To see the other types of publications on this topic, follow the link: Marshall/stiffness.
Journal articles on the topic 'Marshall/stiffness'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Marshall/stiffness.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Razzaq, Ahlam K. "POSSIBILITY OF UTILIZING RECYCLED CONCRETE AGGREGATES IN HMA MIXTURE." Kufa Journal of Engineering 7, no. 3 (2016): 96–109. http://dx.doi.org/10.30572/2018/kje/731197.
Full textAbstract:
Environmental and economic considerations have encouraged civil engineers to find ways to reuse recycled materials in new constructions. The objective of this research was studying the possibility of utilizing recycled concrete RC in a surface course of hot mix asphalt HMA mixtures and evaluating the volumetric and mechanical properties of hot mix asphalt mixtures containing recycled concrete aggregates. For this purpose, the performance of HMA mixtures containing various percentages of RC has been evaluated based on experimental tests, such as Marshall Stability MS, Marshall flow, Marshall stiffness, and Indirect tensile strength ITS. 90 specimens contain 5% asphalt bitumen and RC in various percentages (10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%) were mixed with virgin crushed stone aggregates and compacted by using Marshall Compactor to produce HMA specimen then Marshall mix design method was used to measure the optimum RC content.The results of MS and flows slightly decreased with the addition of RC. Marshall stiffness values for 10 percent RC was higher than the Control Specimen CS and the others. ITS values decreased with increasing RC.A mixture without recycledconcrete RC and varies gradation of maximum size of ( 1/2,1, and 1/2) incheswas prepared as control mix to CM test the Marshall stability –flow , ITS, and temperature sensitivities properties of mixes with 58% ( optimum percent) of RC that is obtained from a mix design that was investigated in this study. Specimens showedslightly improvements in Marshall Stability, flow, and ITS as compared with CM.
2
Saad, Issa Sarsam. "Influence of Ageing Periods on Strength Properties of Rubber Modified Asphalt Concrete." Journal of Sustainable Construction Engineering and Project Management 4, no. 1 (2021): 1–11. https://doi.org/10.5281/zenodo.4882620.
Full textAbstract:
Crumb rubber is usually implemented to enhance the flexibility, strength, and durability of asphalt concrete. An attempt has been made in this assessment to implement (8 and 16) % of crumb rubber powder into three types of asphalt binders obtained from (Nasiriyah, Erbil, and Dourah) oil refineries. Asphalt concrete wearing course specimens have been prepared using Marshall procedure and tested for Marshall stability and indirect tensile strength. Test results were analysed and compared. It was noted that implementation of 8 % of crumb rubber exhibit superior quality of asphalt concrete from Marshall stability and indirect tensile strength points of view regardless of the ageing period or asphalt binder origin. It can be observed that mixture of Dourah binder exhibit the highest Marshall stability of (11.6 and 18.0) kN, highest tensile strength of (1509 and 2159) kPa and highest Marshall stiffness of (3693.8 and 10500) N/mm before and after ageing process respectively. However, the modified Dourah binder mixtures with 8 % crumb rubber exhibits the highest Marshall stability of (15 and 23.5) kN, highest tensile strength of (1967 and 2789) kPa and highest Marshall stiffness of (6168.6 and 23000) N/mm before and after ageing process respectively as compared with mixtures from other binders’ origin. Binder obtained from Erbil refinery exhibit the highest flow value of 3.33 mm as compared with (3.08 and 3.13) mm flow for Nasiriyah and Dourah oil refineries binder respectively.
3
Abed, Mohammed A., and Alaa H. Abed. "Effect of Hybrid Modification and Type of Compaction on the Cracking Properties of Asphalt Concrete." Al-Nahrain Journal for Engineering Sciences 23, no. 2 (2020): 106–16. http://dx.doi.org/10.29194/njes.23020106.
Full textAbstract:
This paper focused on evaluating the effect of aggregate gradation and polymer modification on indirect tensile strength (ITS) and the static stiffness for hot asphalt mixtures. In particular, data from ITS tests have been processed to obtain stiffness measurements through the application of Hondros theory. The results showed that fine mixtures had a better tensile strength by 26.3% than the coarse mixtures. The effect of compaction also was examined, the results showed that samples compacted with the Superpave gyratory compactor (SGC) had an enhancement in ITS by 36.58 and 23.1% in comparison with Marshall and roller compactor respectively. Polymer modifiers were used to estimate their effect on tensile strength, adding 4, 6, and 8% of Styrene-Butadiene-Styrene (SBS), which can rise the ITS by 3.2,6.14 and 13.3% of the non-modified asphalt mixture. Furthermore, using 4, 6, and 8 percent of SBS could increase static stiffness by 53.9, 209.6, and 302.4% respectively for roller compacted fine mixes and 58, 220, and 379.3% for SGC compacted mixes. Furthermore, SBS raised the stiffness modulus by 52.3, 188, and 295% for Marshall compacted mixes. Using hybrid modifier can improve the stiffness of the asphalt mixture. However, The results indicate that using 1, 2 and 3% polyvinyl chloride (PVC) can magnify the stiffness of mixtures by 41.2, 199.8% and 262.6 for roller compacted mixtures and 133.4, 212.1 and 354% for SGC compacted mixtures, whereas there is a stringent increasing by 133.4, 189.2 and 354% for Marshall compacted mixes. Otherwise, polymer-modification can decrease the fracturing index for coarse and fine mixtures.
4
Ajah, Uche Christian, and Elvis Mbadike. "Influence of Oyster Shell Ash Filler on the Marshall Properties of Asphalt Concrete." Scholars Journal of Engineering and Technology 11, no. 08 (2023): 163–71. http://dx.doi.org/10.36347/sjet.2023.v11i08.002.
Full textAbstract:
Roads are vital for the movement of people and goods, and their durability and mechanical properties depend on various factors, including the construction materials used. Marshall properties are crucial for analysis of asphaltic concrete designed for road construction, Also, filler materials improves the properties of asphaltic concrete. Therefore, this study investigated the influence of oyster shell ash (OSA) on the Marshall properties of hot mix asphalt concrete. The Marshall properties analyzed include stability, flow, void in mineral aggregate (VMA), void in the mixture (VIM), void filled with asphalt (VFA), and Marshall Quotient (MQ). The research revealed that the addition of oyster shell ash enhanced the stability and flow of asphaltic concrete. VMA and VFA increased with increase in OSA content, while increase in asphalt content resulted in a decrease in VIM and increase in VFA. The optimum performance of the Marshall’s properties was recorded at 10% OSA and 5% asphalt content. The study also showed that the OSA-filled asphaltic concrete improved the performance of the OSA-filled asphalt concrete stability and stiffness compared to the sample without OSA. Moreover, OSA enhances the stiffness of the mixture, as reflected by the Marshall Quotient. Therefore, the findings highlighted the potential of oyster shell ash as a viable and sustainable filler material in asphaltic concrete.
5
Rusbintardjo, Gatot. "Utilization of Buton Natural Rock Asphalt as Additive of Bitumen Binder in Hot Mix Asphalt Mixtures." Advanced Materials Research 723 (August 2013): 543–50. http://dx.doi.org/10.4028/www.scientific.net/amr.723.543.
Full textAbstract:
In Buton Island, an island located in South-East Sulawesi Island in Indonesia is found about 700 million tons natural rock asphalt (NRA) which have not been maximally utilized yet. Buton-NRA contains 20 to 30% of bitumen. This paper reported the first part of the research on utilizing of Buton-NRA as additive of bitumen binder in hot mix asphalt (HMA) mixtures. Amount of 15, 20, 25, 30, 35, 50, and 65% of very fine of Buton-NRA was added into the bitumen, resulted Buton-NRA-Bitumens binder. Penetration and softening point test was conducted to get penetration index (PI) value, an index to determine the temperature susceptibility of the binder. The results show that the Buton-NRA-Bitumens binder has low temperature susceptibility. Use as binder in HMA mixtures also shown that the Buton-NRA-Bitumens binder can improve the performance of the mixtures. Marshall Stability and stiffness of the mixtures is higher compare to that of base bitumen binder, especially Buton-NRA-Bitumens binder with 50% of Buton-NRA, Marshall Stability reach 2374kg and stiffness 311kg.mm, while HMA mixtures with base bitumen (0% Buton-NRA) only has 1294kg of Marshall stability and 169kg/mm of stiffness.
6
Sarsam, Saad I., and Mahmood Khalid Jumaah. "Modeling of Comparative Performance of Asphalt Concrete under Hammer, Gyratory, and Roller Compaction." Journal of Engineering 22, no. 11 (2016): 1–15. http://dx.doi.org/10.31026/j.eng.2016.11.01.
Full textAbstract:
The main objective of this study is to develop predictive models using SPSS software (version 18) for Marshall Test results of asphalt mixtures compacted by Hammer, Gyratory, and Roller compaction. Bulk density of (2.351) gm/cc, at OAC of (4.7) % was obtained as a benchmark after using Marshall Compactor as laboratory compactive effort with 75-blows. Same density was achieved by Roller and Gyratory Compactors using its mix designed methods.
 A total of (75) specimens, for Marshall, Gyratory, and Roller Compactors have been prepared, based on OAC of (4.7) % with an additional asphalt contents of more and less than (0.5) % from the optimum value. All specimens have been subjected to Marshall Test. Mathematical models obtained indicated that variation of Marshall Stiffness is based on the variation of air voids. All of these models depend on asphalt cement content too.
 
7
Al-Araji, Nowfel M. H., Ghazi Jalal Kashesh, and Anmar Dulaimi. "Effect of Adding Metakaolin and Dolomite Powder on the Properties of Hot Mix Asphalt." IOP Conference Series: Earth and Environmental Science 1507, no. 1 (2025): 012048. https://doi.org/10.1088/1755-1315/1507/1/012048.
Full textAbstract:
Abstract Modifiers have been applied to enhance the performance of asphalt binder and asphalt mixes in recent years. In this study, metakaolin and dolomite powder have been used as fillers for the potential to enhance the characteristics of hot mix asphalt. An experimental program on asphalt mixes was undertaken to evaluate the impact of both metakaolin and dolomite powder materials on pavement performance. Both materials were used instead of part of the traditional filler (cement) with different percentages (0%, 50%, 100%) by weight of mixes. Several fundamental assessments were performed on the asphalt mixture, including Marshall Stability (MS), Marshall Flow (MF), Unit weight (γ), Marshall Quotient (MQ), and Marshall Stiffness Modulus (Ms). The outcomes showed that the properties of the modified asphalt mixture improved by using binary blended filler (50% metakaolin and 50% dolomite) in comparison to the traditional hot mix asphalt. Furthermore, the replacement of cement with 100% metakaolin increases Marshall stability by around 27% compared to the traditional hot mix asphalt.
8
Asfiati, Sri, Zurkiyah, M. Yani, Indrayani, and Sri Prafanti. "Analysis of mixed stiffness modulus of different asphalt levels for AC–BC pavement layer with pertamina 60/70 asphalt and 60/70 esso asphalt material." Journal of Physics: Conference Series 2193, no. 1 (2022): 012017. http://dx.doi.org/10.1088/1742-6596/2193/1/012017.
Full textAbstract:
Abstract Asphalt/bitumen is a brownies black material, is viscous so it will soften and melt when it gets enough heating. In general, asphalt is obtained from petroleum refining. Pavement construction in Indonesia, both road rehabilitation project, maintenance and construction of roads, generally. Pertamina 60/70 asphalt is used as a binder for the asphalt mixture. Apart from pertamina asphalt, there are several types of asphalt that ore often used in projects in Indonesia, one of which is esso 60/70 asphalt.Esso asphalt is a type of asphalt produced from foreign companies outside of Indonesia, so it is necessary to do a comparative research test on the Marshall Properties and the stiffness modulus of asphalt. The research was conducted to analyze the stress-strain relationship which show the stiffness and strength of the asphalt material by experimenting with several test objects using the Marshall tool. If the value of the stiffness modulus decreases, asphalt aging will occur which causes the pavement to crack easily when receiving heavy loads. The stiffness modulus analysis of the asphalt mixture is an analytic procedure for planning and evaluating the performance of asphalt mixture. Asphalt mixture is a material that is not perfectly elastic, so the use of the term modulus of elasticity (E) is not suitable, instead the term mixed stiffness modulus is used. The data needed is the value of the stiffness of the asphalt content mixture which was tested by the laboratory to obtain the stiffness modulus and asphalt content characteristic.
9
Al Qadi, Arabi N. S., Taisir S. Khedaywi, Madhar A. Haddad, and Owies A. Al-Rababa'ah. "Investigating the Effect of Olive Husk Ash on the Properties of Asphalt Concrete Mixture." Annales de Chimie - Science des Matériaux 45, no. 1 (2021): 11–15. http://dx.doi.org/10.18280/acsm.450102.
Full textAbstract:
Technology in transportation used available resources to make it safe, fast, suitable, easy, economic, and environmental to transport people and goods. Olive Husk became an environmental problem as waste materials especially in the Middle East where huge quantities are found. The objective of this research is to investigate the effect of addition of Olive Husk Ash (OHA) on the properties of asphalt concrete mixtures. Marshall Test was used to perform the asphalt concrete mixture by the addition of OHA to the binder of asphalt; different percentages of OHA (0, 5, 10, 15, and 20%) by volume were added to the binder. Five percent of asphalt cements (5, 5.5, 6, 6.5 and 7%) by weight and limestone aggregate were used for preparing asphalt mixture specimens to find the optimum content of asphalt that could be used in the binder. Tests on flow, stability, air void percentage and void in mineral aggregate, retained stability, stiffness, and retained stiffness were made. The principle results on OHA as filler in Asphalt binder improves the Marshall Stability, and void in mineral aggregate and decrease in flow, retained stability, stiffness, and retained stiffness with a 10%-15% of olive husk ash replacement of asphalt binder. The contribution that OHA could be used as a pavement construction material in field.
10
Mashaan, Nuha, Amin Chegenizadeh, and Hamid Nikraz. "Laboratory Properties of Waste PET Plastic-Modified Asphalt Mixes." Recycling 6, no. 3 (2021): 49. http://dx.doi.org/10.3390/recycling6030049.
Full textAbstract:
Commercial polymers have been used in pavement modification for decades; however, a major drawback of these polymers is their high cost. Waste plastic polymers could be used as a sustainable and cost-effective additive for improving asphalt properties, attaining combined environmental–economic benefits. Since 2019, in Australia, trial segments of roads have been built using waste materials, including plastic, requiring that laboratory evaluations first be carried out. This study aims to examine and evaluate the effect of using a domestic waste plastic, polyethylene terephthalate (PET), in modifying C320 bitumen. The assessment of several contents of PET-modified bitumen is carried out in two phases: modified bitumen binders and modified asphalt mixtures. Dynamic shear rheometer (DSR) and rolling thin film oven tests (RTFOT) were utilised to investigate the engineering properties and visco-elastic behaviour of plastic-modified bitumen binders. For evaluating the engineering properties of the plastic-modified asphalt mixtures, the Marshall stability, Marshall flow, Marshall quotient and rutting tests were conducted. The results demonstrated that 6–8% is the ideal percentage of waste plastic proposed to amend and enhance the stiffness and elasticity behaviour of asphalt binders. Furthermore, the 8% waste PET-modified asphalt mixture showed the most improvement in stability and rutting resistance, as indicated by increased Marshal stability, increased Marshall quotient and decreased rut depth. Future fatigue and modulus stiffness tests on waste plastic-modified asphalt mixtures are suggested to further investigate the mechanical properties.
11
Abudullahi, Ali Mohamed, Kwong Yiing Ting, Wee Kang Choong, and Boon Hoe Goh. "The Effects of Temperature on the Stiffness Modulus of Dense Graded Asphalt Mixtures." Applied Mechanics and Materials 423-426 (September 2013): 997–1000. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.997.
Full textAbstract:
This study aimed to investigate the effect of temperature on stiffness modulus of asphaltic concrete. The asphaltic concrete mixture were prepared based on Marshall Mix Design method using two different types of bitumen, the 80/100 penetration grade bitumen (80/100 PGB) and Styrene-Butadiene-Styrene (SBS), both with five percent bitumen content. Indirect Tensile Stiffness Modulus (ITSM) test of 1000 N loading was then performed at three different temperatures (25 °C, 30 °C and 40 °C). The results showed that stiffness modulus decreases with increases in temperature for both 80/100 PGB and SBS, which shows the important role of temperature to stiffness modulus of asphaltic concrete. Also, the results showed a higher stiffness modulus for SBS mixtures compare to that of 80/100 PGB mixtures.
12
Azarhoosh, Alireza, Mehdi Koohmishi, and Gholam Hossein Hamedi. "Rutting Resistance of Hot Mix Asphalt Containing Coarse Recycled Concrete Aggregates Coated with Waste Plastic Bottles." Advances in Civil Engineering 2021 (June 21, 2021): 1–11. http://dx.doi.org/10.1155/2021/9558241.
Full textAbstract:
The use of recycled concrete aggregate (RCA) as a part of coarse aggregates in asphalt pavements confers economic and environmental benefits. Coarse RCA (CRCA) has inferior mechanical and physical properties compared to natural aggregates due to very porous and weakly adhered cement mortar. In this study, CRCA surfaces were coated with waste plastic bottles (WPB) and used at 15%, 30%, and 50% in the asphalt concrete. The Marshall, stiffness modulus, and dynamic creep tests were performed to determine the strength of hot mix asphalts against rutting. The results revealed that the use of untreated CRCA reduced the Marshall quotient and the rutting resistance of the asphalt concrete. The results of the stiffness modulus and dynamic creep tests indicated that CRCA incorporation increased permanent deformation in the tested specimens due to the reduction of asphalt concrete stiffness. However, the asphalt concrete containing treated CRCA had lower permanent deformation because WPB promotes CRCA stability by penetrating its void and reinforcing cement mortar. Furthermore, by raising the temperature, the strength of all asphalt concretes decreased against rutting, and the reduction rate was higher in the modified specimens.
13
Darabadi, Babak Kazemi, and Hasan Taherkhani. "An investigation on the effects of flaky particles on the properties of asphaltic mixtures." Canadian Journal of Civil Engineering 42, no. 11 (2015): 865–71. http://dx.doi.org/10.1139/cjce-2014-0458.
Full textAbstract:
Flaky particles, because of their shape, are considered as inferior aggregates in asphaltic mixtures, and specifications usually set limits on the amount of flaky particles in asphaltic mixtures. In this study, the effects of flaky particles content on the volumetric properties, Marshall Stability and creep behaviour of hot mixed asphaltic concrete have been investigated. Specimens with two different types of gradation and specified amounts of flaky particles were made and used for Marshall Stability and static creep tests. Test results show that the Marshall Stability decreases and the air voids content of asphaltic mixture and the voids in mineral aggregate increase as the flaky particles content increases. It is also found that flaky particles cause increase in permanent deformation and decrease in creep stiffness. The creep tests also show that the recoverable deformation of the mixtures decreases as the flaky particles content increases.
14
Maleka, Abdulmalik Musa, Ahmed Wsoo Hamad, and Ramadhansyah Putra Jaya. "Effect of Palm Oil Fuel Ash (POFA) on the Durability of Asphaltic Concrete." Applied Mechanics and Materials 744-746 (March 2015): 1560–65. http://dx.doi.org/10.4028/www.scientific.net/amm.744-746.1560.
Full textAbstract:
The Cantabro durability test is usually used for open graded asphalt mixtures and has seen little use with dense graded mixtures. This paper presents durability data from the Cantabro test for Palm oil fuel ash (POFA) modified dense graded asphaltic concrete AC 14. The nature and amount of filler in an asphaltic concrete mixes significantly affect its design and performance. POFA is an ash obtained from the burning of waste material generated from the production of crude palm oil which is of high quantity in Malaysia. A number of trial mixes were prepared using the Marshall Mix design procedure with 5% POFA and 1% Ordinary Portland Cement (OPC) as filler materials to arrive at asphalt concrete mixtures that fulfil the Marshall criteria. Cantabro durability test was used to measure the durability of the asphaltic concrete. The results show that Marshall stability, flow, stiffness and cantabro loss values shows general improvement for the POFA modified asphalt compared to the control specimens.
15
Baldo, Nicola, Matteo Miani, Fabio Rondinella, Jan Valentin, Pavla Vackcová, and Evangelos Manthos. "Stiffness Data of High-Modulus Asphalt Concretes for Road Pavements: Predictive Modeling by Machine-Learning." Coatings 12, no. 1 (2022): 54. http://dx.doi.org/10.3390/coatings12010054.
Full textAbstract:
This paper presents a study about a Machine Learning approach for modeling the stiffness of different high-modulus asphalt concretes (HMAC) prepared in the laboratory with harder paving grades or polymer-modified bitumen which were designed with or without reclaimed asphalt (RA) content. Notably, the mixtures considered in this study are not part of purposeful experimentation in support of modeling, but practical solutions developed in actual mix design processes. Since Machine Learning models require a careful definition of the network hyperparameters, a Bayesian optimization process was used to identify the neural topology, as well as the transfer function, optimal for the type of modeling needed. By employing different performance metrics, it was possible to compare the optimal models obtained by diversifying the type of inputs. Using variables related to the mix composition, namely bitumen content, air voids, maximum and average bulk density, along with a categorical variable that distinguishes the bitumen type and RAP percentages, successful predictions of the Stiffness have been obtained, with a determination coefficient (R2) value equal to 0.9909. Nevertheless, the use of additional input, namely the Marshall stability or quotient, allows the Stiffness prediction to be further improved, with R2 values equal to 0.9938 or 0.9922, respectively. However, the cost and time involved in the Marshall test may not justify such a slight prediction improvement.
16
Jia, Xiaoyang, Wei Hu, Pawel Polaczyk, Hongren Gong, and Baoshan Huang. "Comparative Evaluation of Compacting Process for Base Materials using Lab Compaction Methods." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 4 (2019): 558–67. http://dx.doi.org/10.1177/0361198119837953.
Full textAbstract:
Precise characterization of the compactability of aggregates and soils in the laboratory has always been a challenge to pavement technologists. The present study investigated compactability of aggregates and soils through the comparison of three laboratory compaction methods, the Superpave Gyratory Compactor, the Marshall impacting hammer, and a vibratory compacting machine. Accelerometers were attached to the Marshall impacting hammer and a laboratory scale vibratory compactor to capture the dynamic response of soils and aggregates during compaction. The results from this comparative experiment indicated that there was a consistent relationship between the stiffness of soils and aggregates and the dynamic responses from impaction and vibration, which can be used to better characterize the compactability of different paving materials through laboratory testing.
17
Mior Sani, Wan Noor Hin, Asnif Hakimi Azman, Jusma Jaafar, Indra Mawardi, Norhidayah Abdul Hassan, and Mohd Hazree Hashim. "Fiber from Coconut as Smart Materials in Road Construction." Smart and Green Materials 1, no. 2 (2024): 129–46. https://doi.org/10.70028/sgm.v1i2.19.
Full textAbstract:
This study investigates the effects of incorporating coconut fiber as a sustainable modifier in bitumen mixtures, focusing on its impact on mechanical properties such as Marshall stability, indirect tensile strength (ITS), flow, stiffness, and abrasion resistance. Coconut fiber was added at varying percentages (0%, 0.50%, 0.75%, and 1%) to evaluate its performance. The Marshall stability results revealed a significant improvement at 1% fiber content, achieving the highest stability of 11.978 kN, while ITS exhibited a strong polynomial correlation (R2 =0.9818) with fiber content, peaking at 423 kPa for the same fiber percentage. Flow and stiffness showed non-linear trends, with optimal results observed at specific fiber levels, reflecting the complex interaction between fiber dispersion and matrix bonding. Abrasion loss analysis indicated that lower fiber percentages (0.50%) enhanced wear resistance, while higher contents (1%) improved structural integrity but increased susceptibility to wear. The findings highlight that 1% coconut fiber content provides the best balance between mechanical strength and durability, offering a promising approach for enhancing bitumen performance in sustainable road construction. These results underscore the potential of coconut fiber as a cost-effective and environmentally friendly material for improving the performance of bituminous mixtures, aligning with sustainable development goals.
18
Hashim, Zuraidah, Wan Noor Hin Mior Sani, Nik Nur Dina Nik Azmi, Safety Husna Pangestika, and Mohd Hazree Hashim. "Effect of Kaolin on Asphalt Concrete Properties Under Aging Conditions." Smart and Green Materials 1, no. 2 (2024): 114–28. https://doi.org/10.70028/sgm.v1i2.21.
Full textAbstract:
Asphalt modification is an essential process in enhancing the performance and durability of asphalt mixtures. Recently, many research has been carried out in order to shift construction industry into a green and sustainable industry. This study investigates the effect of kaolin as a partial replacement for asphalt in asphalt concrete, focusing on its impact on the mechanical properties of the mixture under various aging conditions. The asphalt mixtures were subjected to Marshall stability, resilient modulus, and dynamic creep tests to assess stability, stiffness, and rutting resistance. The results show that the incorporation of kaolin improves the overall performance of the asphalt mixtures, with 6% kaolin replacement providing the most favorable balance between stability, stiffness, and flexibility. Unaged samples with higher kaolin content exhibited increased Marshall stability, resilient modulus, and dynamic creep modulus, indicating enhanced rutting resistance. Long-term aging further enhanced the mechanical properties, with kaolin-modified mixtures showing better performance compared to their short-term aged counterparts. These findings suggest that kaolin can be an effective modifier in asphalt mixtures, offering a sustainable and cost-effective solution to improve the durability and performance of pavement materials.
19
Sarsam, Saad Issa, and Samer Muayad Adbulmajeed. "Influence of Aging Time on Asphalt Pavement Performance." Journal of Engineering 20, no. 12 (2023): 1–12. http://dx.doi.org/10.31026/j.eng.2014.12.01.
Full textAbstract:
Aging of asphalt pavements typically occurs through oxidation of the asphalt and evaporation of the lighter maltenes from the binder. The main objective of this study is to evaluate influence of aging on performance of asphalt paving materials.nAsphalt concrete mixtures, were prepared, and subjected to short term aging (STA) procedure which involved heating the loose mixtures in an oven for two aging period of (4 and 8) hours at a temperature of 135 o C. Then it was subject to Long term aging (LTA) procedure using (2 and 5) days aging periods at 85 o C for Marshall compacted specimens. The effect of aging periods on properties of asphalt concrete at optimum asphalt content such as Marshall Properties, indirect tensile strength at 25 o C, Resilient Modulus and resistance to permanent deformation were evaluated. The impact of Short-term and long-term aging on asphalt concrete properties was evaluated. The stiffness of the mixture increases by increasing aging period that lead to increase of Marshall Stability, indirect tensile strength, and the resilient modulus, which leads to increases the resistance of mixtures against permanent deformation. The 8 hr. short term aging causes the Marshall stability, indirect tensile strength at 25 o C and resilient modulus to be increased by 52%, 34 % , 20% respectively as compared with control mixture while, the permanent deformation decreased by (33 %) as compared with control mixture.
20
KÖK, Baha Vural, Mehmet YILMAZ, and Yunus ERKUS. "EFFECTS OF GRAPHITE ON MECHANICAL PROPERTIES OF STONE MASTIC ASPHALT PAVEMENT." Journal of Civil Engineering and Management 23, no. 8 (2017): 1013–20. http://dx.doi.org/10.3846/13923730.2017.1374302.
Full textAbstract:
Hot mix asphalt needs to be developed to resist particular permanent deformations like rutting and thermal cracking due to increased traffic volumes and vehicle loads. Additives such as carbon black, graphite, carbon fibers are used in the mixture or the binder for improving the mechanical features of asphalt. In this article, the effects of graphite used for developing the mechanical properties of asphalt have been investigated in mixtures tests. Therefore, Marshall stability, indirect tensile stiffness modulus and indirect tensile fatigue tests were performed to bituminous mixtures modified with three different proportions of graphite by weight of bitumen. Stone mastic asphalt mixtures which were manufactured with pure and modified bitumen were aged in different time intervals in the oven. In conclusion, it has defined that Marshall stability values have declined. It has been determined that there is no significant difference in the time-dependent deformation behavior of the original and aged samples in pure and different graphite content although the stiffness modulus and load repeat number of the samples increased with the rise of the aging time. These results shown that graphite generally used for improving the thermal properties in literature were also determined to contribute to mechanical properties of mixtures.
21
Iwański, M., P. Buczyński, and G. Mazurek. "The use of gabbro dust in the cold recycling of asphalt paving mixes with foamed bitumen." Bulletin of the Polish Academy of Sciences Technical Sciences 64, no. 4 (2016): 763–73. http://dx.doi.org/10.1515/bpasts-2016-0085.
Full textAbstract:
Abstract Mineral fines are a waste product of aggregate production in quarries and asphalt mixing plants. The incorporation of mineral gabbro dust into foam bitumen causes developing of a mesh reinforcement in the recycled base mixture. This mesh reinforcement, observed in a recycled base structure, induces an increase in stiffness modulus, where its elastic part of complex modulus dominates over the imaginary part. Therefore, it is possible to create a recycled mixture with a lower susceptibility to loading time/temperature. In result, the presence of gabbro dust in recycled mixture limits the magnitude of strains induced by the traffic load. This paper presents the results of the tests carried out on the mineral dusts derived from gabbro rock. Structural and functional properties of the fines were determined to prepare their characteristics. Then, the cold recycled mixtures for the road base were designed with the 5–20% mineral fines content. The mixtures were prepared in cold recycling technology with foamed bitumen. Further tests involved determining mechanical and physical properties of the recycled mixes, including air voids content, Marshall stability, Marshall quotient (stiffness), indirect tensile strength and stiffness modulus at 20°C). The results indicated a positive influence of the gabbro dusts on the investigated parameters. With the use of ANOVA tests, the significance of the influence of the gabbro dust and foamed bitumen on these properties was evaluated. Harrington’s multicriteria method was employed to establish gabbro dust and foamed bitumen amounts, the addition of which would guarantee optimal properties of the recycled base mixture.
22
Agus Ariawan, I. Made, D. M. Priyantha Wedagama, I. Nyoman Arya Thanaya, I. Gusti Agung Ratih Kusuma Wardani, and I. Putu Chandra Wibawa. "Kinerja Mekanistik Campuran Beraspal dengan Mensubstitusi Agregat Kasar dengan Batu Vulkanik Merah." Jurnal Teknik Sipil 30, no. 3 (2023): 397–404. http://dx.doi.org/10.5614/jts.2023.30.3.8.
Full textAbstract:
Semakin terbatasnya ketersediaan batu vulkanik di alam menyebabkan bahan konstruksi perkerasan jalan menggunakan batu vulkanik hitam tercampur dengan batu vulkanik merah yang berat jenisnya lebih ringan dan berpori. Penelitian ini bertujuan menganalisis kinerja mekanistik campuran beraspal dengan mensubstitusi agregat kasar dengan batu vulkanik merah hingga prosentase 10% pada ukuran butiran ½”, 3/8”, No.4 sesuai dengan kondisi di lapangan. Pembuatan campuran beraspal dilakukan dengan metode marshall. Karakteristik mekanistik diperoleh dari pengujian modulus kekakuan tarik tidak langsung/Indirect Tensile Stiffness Modulus (ITSM) sesuai BS EN 12697-26: 2012, pengujian rangkak dinamis/dynamic creep (BS EN 12697–25:2005) dan pengujian kelelahan tarik tidak langsung/Indirect Tensile Fatique Test (ITFT) sesuai BS EN 12697–24:2012 menggunakan alat uji dynapave universal testing material (UTM) 30. Nilai-nilai karakteristik marshall campuran beraspal memenuhi spesifikasi Kementrian PUPR (2020), karakteristik kekakuan meningkat rata-rata 6,9% setiap penambahan substitusi 5% batu vulkanik merah. Ketahanan deformasi meningkat dengan nilai tipikal kemiringan rangkak menyimpulkan campuran beraspal dapat digunakan untuk beban lalu lintas berat (ESA >106). Karakteristik ketahanan kelelahan lebih rendah (lebih awal runtuh) dibandingkan dengan tanpa substitusi batu vulkanik merah dan terjadi penurunan ketahanan kelelahan sebesar 2,18% setiap penambahan substitusi 5% batu vulkanik merah. Abstract The increasingly limited availability of volcanic stone in nature has caused road pavement construction materials to use black volcanic stone mixed with red volcanic stone, which is lighter in density and porous. This research aims to analyze the mechanistic performance of asphalt mixtures by substituting coarse aggregate with red volcanic stone up to a percentage of 10% at a granule size of ½", 3/8", No. 4 according to conditions in the field. The asphalt mixture is made using the marshall method. Mechanistic characteristics are obtained from indirect tensile stiffness modulus (ITSM) testing according to BS EN 12697-26: 2012, dynamic creep testing (BS EN 12697–25:2005) and indirect tensile fatigue testing (ITFT) according to BS EN 12697–24:2012 using a dynapave universal testing material (UTM) 30 test tool. The marshall characteristic values of the asphalt mixture meet the specifications of the Ministry of PUPR (2020), the stiffness characteristic increases by an average of 6.9 % for each additional substitution of 5% red volcanic stone. Deformation resistance increases with typical values of creep slope, concluding that asphalt mixtures can be used for heavy traffic loads (ESA >106). The fatigue resistance characteristics are lower (earlier to collapse) compared to without red volcanic stone substitution and there is a decrease in fatigue resistance of 2.18% for each additional 5% red volcanic stone substitution.
23
TrustGod, John Ayibatunimibofa, and Ebuka Nwankwo. "Evaluation of the Stability and Flow of Asphalt Concrete Produced with Waste Brick Tile Powder as a Filler." Journal of Engineering 29, no. 12 (2023): 1–13. http://dx.doi.org/10.31026/j.eng.2023.12.01.
Full textAbstract:
The utilization of recycled brick tile powder as a replacement for conventional filler in the asphalt concrete mix has been studied in this research. This research evaluates the effectiveness of recycled brick tile powder and determines its optimum replacement level. Using recycled brick tile powder is significant from an environmental standpoint as it is a waste product from construction activities. Sixteen asphalt concrete samples were produced, and eight were soaked for a day. Samples contained 5% Bitumen, 2% to 5% brick tile powder, and conventional stone dust filler. The properties of samples were evaluated using the Marshall test. It was observed that the resistance to stiffness and deformation of asphalt concrete was increased by 99% when the conventional filler was replaced with brick tile powder. The resistance to deformation decreases as the percentage of brick tile powder increases while Marshall stability values increase significantly. At an optimum content of 4% recycled brick tile powder as filler, the Marshall stability is increased by 123%. Based on this investigation, it is established that brick tile powder can be effectively used in asphaltic concrete as a filler. This presents a sustainable solution to waste utilization and pavement performance.
24
Saad, Issa Sarsam. "Impact of Ageing on Strength Parameters of Asphalt Concrete." Journal of Building Construction 3, no. 2 (2021): 1–8. https://doi.org/10.5281/zenodo.5493550.
Full textAbstract:
Ageing of asphalt concrete pavement causes loss of volatiles and decline the flexibility of the mixture. In the present investigation, an attempt has been made to assess the impact of short and long-term ageing process on the tensile, shear, and Marshall properties of asphalt concrete. The susceptibility of the asphalt concrete to testing temperature was also monitored. Asphalt concrete mixtures were prepared at optimum binder content. Extra specimens were also prepared at 0.5 % binder higher and lower than the optimum. The mixtures were subjected to short-term ageing. Marshall specimens were prepared and subjected to long-term ageing. Control mixtures without agĀeing process were prepared for comparison. The strength properties were determined. It was concluded that at optimum binder content, the indirect tensile strength of asphalt concrete increases by (7.3, and 27.4) % , the punching shear strength increases by (25.6, and 223.8) % while the Marshall stability increases by (21.2, and 29.7) % and the Marshall stiffness increases by (38.6, and 143.1) % for mixtures practicing short-term ageing and short and long-term ageing process respectively as compared with the control mixture. At (25, 40, and 60) °C testing temperatures, the indirect tensile strength of asphalt concrete increases by (7.3, and 27.4) % (23.7, and 94) % and (131.8, and 353.6) % for mixtures practicing short-term ageing and short and long-term ageing process respectively as compared with the control mixture. The tensile strength of asphalt concrete is highly susceptible to the testing environment.
25
Jaleel, Mustafa Mohammed, Mustafa Albdairi, and Ali Almusawi. "Marshall-Based Thermal Performance Analysis of Conventional and Polymer-Modified Asphalt Binders." Construction Materials 5, no. 2 (2025): 40. https://doi.org/10.3390/constrmater5020040.
Full textAbstract:
Iraq’s extreme summer temperatures pose critical challenges to pavement durability, as conventional asphalt mixtures often fail under prolonged thermal stress. This paper provides a comparative evaluation of the high-temperature performance of unmodified (40/50 penetration grade) and polymer-modified (PG 76-10) asphalt mixtures for the asphalt course layer. Marshall stability, flow, and stiffness were measured at elevated temperatures of 60 °C, 65 °C, 70 °C, and 75 °C after short-term (30 min) and extended (24 h) conditioning. Results show that while both mixtures experienced performance degradation as the temperature increased, the polymer-modified mixture consistently exhibited superior thermal resistance, retaining approximately 9% higher stability and 28% higher stiffness, and displaying 18% lower flow deformation at 75 °C compared to the unmodified mixture. Stability degradation rate (SDR), stiffness degradation rate (SiDR), and flow increase rate (FIR) analyses further confirmed the enhanced resilience of PG 76-10, showing nearly 39% lower FIR under thermal stress. Importantly, PG 76-10 maintained performance within specification thresholds under all tested conditions, unlike the conventional 40/50 mixture. These findings emphasize the necessity of adapting mix design standards to regional climatic realities and support the broader adoption of polymer-modified asphalt binders to enhance pavement service life in hot-climate regions like Iraq.
26
Ranieri, Vittorio, Nicola Berloco, Francesca Garofalo, Liang He, Paolo Intini, and Karol J. Kowalski. "Effects of Reclaimed Asphalt, Wax Additive, and Compaction Temperature on Characteristics and Mechanical Properties of Porous Asphalt." Baltic Journal of Road and Bridge Engineering 17, no. 3 (2022): 187–213. http://dx.doi.org/10.7250/bjrbe.2022-17.575.
Full textAbstract:
This paper describes physical and mechanical properties of porous asphalt mixtures with various RAP amount (0%, 10%, 20%, 30%) containing one WMA additive (organic wax). The samples were prepared using the Marshall compactor at two different temperatures (125 °C, 145 °C) by fabricating six series of porous mixtures. Air void content, particle loss, stiffness modulus, indirect tensile strength, and indirect tensile strength ratio were measured and the effects of RAP, wax, and compaction temperatures were evaluated, considering the results of statistical analyses. Based on the performed tests, it has been concluded that high RAP contents (30%) in WMA-RAP PAs result in decreased porosity, permeability, and moisture resistance, and in increased cohesiveness, stiffness, and indirect tensile strength compared to the reference PAs. On the other hand, for low RAP contents (10%), WMA-RAP PAs show lower cohesiveness and indirect tensile strength, at the same time demonstrating an increase in porosity, permeability, moisture resistance, and stiffness. Reduced compaction temperatures (125 °C) particularly affect the cracking resistance.
27
Bousmaha, Youssra, M’hammed Merbouh, Suhana Koting, and Ali Mohammed Babalghaith. "Performance Evaluation of Asphalt Concrete Wearing Containing Plastic Bags Using the Dry Method Under Various Thermal Cycles." Romanian Journal of Transport Infrastructure 13, no. 2 (2024): 1–22. https://doi.org/10.2478/rjti-2024-0016.
Full textAbstract:
Abstract Premature technical issues in roads and highways worldwide often stem from inadequate asphalt concrete composition or intense traffic loads under varying climatic conditions. This study evaluated the performance of both original and low-density polyethylene (LDPE)-modified asphalt concrete under various thermal cycling conditions. Three thermal cycling ranges [-20°C to +20°C, +20°C to +40°C, and +40°C to +60°C] were applied to assess the mixtures’ mechanical performance. The LDPE modification involved replacing 5% of the bitumen weight with dry plastic bags. Performance was assessed using Marshall stability, dynamic creep, wheel tracking, and resilient modulus tests. Results indicated that LDPE modification significantly improved Marshall stability, reduced permanent deformation, and increased the stiffness modulus of the asphalt concrete. Notably, freezing-thawing cycles [-20°C to +20°C] caused more damage to the asphalt concrete compared to heating-cooling cycles. Moreover, the LDPE-modified mixture demonstrated enhanced performance across all thermal cycling ranges, suggesting its potential to improve road durability under diverse climatic conditions.
28
Putra, I. Gusti Agung Ananda, I. Nyoman Arya Thanaya, I. Made Agus Ariawan, and Yenni Ciawi. "Enhancing Porous Asphalt Performance by Adding Waste Mask Fiber: Experimental Analysis of Stiffness, Fatigue, and Creep at Optimum Asphalt Content." Revista de Gestão Social e Ambiental 18, no. 7 (2024): e06900. http://dx.doi.org/10.24857/rgsa.v18n7-102.
Full textAbstract:
Purpose: This study aims to evaluate the impact of incorporating waste mask fibers into porous asphalt mixtures, focusing on stiffness, fatigue, and creep performance at the optimum asphalt content (OAC). Theoretical Reference: The study is based on sustainable construction and materials engineering theories, emphasizing the recycling of waste materials to enhance the performance of construction materials and mitigate environmental impacts. Method: Laboratory experiments were conducted by adding waste mask fibers at varying levels (0%, 1%, 2%, and 3% by weight of asphalt) to the porous asphalt mixtures. Test specimens were designed and evaluated for stability, flow, Marshall Quotient, Voids in Mineral Aggregate (VIM), indirect tensile strength (ITS), stiffness (ITSM), fatigue, and creep performance. Results and Conclusion: The addition of 1% waste mask fibers at the OAC is recommended as it meets the criteria for stability, flow, Marshall Quotient, and VIM. The Cantabro Test showed enhanced resistance, while the ITS Test indicated increased indirect tensile strength. The ITSM Test revealed heightened stiffness of the mixture. Although fatigue testing demonstrated that the porous asphalt mixture could bear loads until collapse at a certain stress level, the creep test confirmed the mixture's resistance to permanent deformation due to traffic loads. Implications of research: The findings suggest that incorporating waste mask fibers into asphalt mixtures can improve mechanical properties and durability, offering a sustainable solution for mask waste disposal. This approach can be adopted by policymakers and engineers to enhance road construction practices while addressing environmental concerns. Originality/value: This study provides novel insights into the recycling of waste mask fibers in asphalt mixtures, demonstrating their potential to improve performance and sustainability in road construction. The research offers a pioneering approach to addressing the environmental challenges.
29
Khiong, Lim Min, Md Safiuddin, Mohammad Abdul Mannan, and Resdiansyah. "Material Properties and Environmental Benefits of Hot-Mix Asphalt Mixes Including Local Crumb Rubber Obtained from Scrap Tires." Environments 8, no. 6 (2021): 47. http://dx.doi.org/10.3390/environments8060047.
Full textAbstract:
This paper presents the results of a laboratory-based experimental investigation on the properties of asphalt binder and hot-mix asphalt (HMA) mixes modified by locally available crumb rubber, which was used as a partial replacement of asphalt by weight. In this study, fine crumb rubber with a particle size in the range of 0.3–0.6 mm, obtained from scrap tires, was added to the asphalt binder through the wet process. Crumb rubber contents of 5%, 10%, 15%, and 19% by weight of asphalt were added to the virgin binder in order to prepare the modified asphalt binder samples, while the unmodified asphalt binder was used as the control sample. The crumb rubber modified binder samples were examined for measuring viscosity indirectly using the penetration test, and temperature resistance using the softening point test. Later, both the modified and unmodified asphalt binders were used to produce HMA mixes. Two categories of HMA mix commonly used in Malaysia—namely, AC 14 (dense-graded) and SMA 14 (gap-graded)—were produced using the modified asphalt binders containing 5%, 10%, 15%, and 19% crumb rubber. Two AC 14 and SMA 14 control mixes were also produced, incorporating the unmodified asphalt binder (0% crumb rubber). All of the AC 14 and SMA 14 asphalt mixes were examined in order to determine their volumetric properties, such as bulk density, voids in total mix (VTM), voids in mineral aggregate (VMA), and voids filled with asphalt (VFA). In addition, the Marshall stability, Marshall flow, and stiffness of all of the AC 14 and SMA 14 mixes were determined. Test results indicated that the modified asphalt binders possessed higher viscosity and temperature resistance than the unmodified asphalt binder. The viscosity and temperature resistance of the asphalt binders increased with the increase in their crumb rubber content. The increased crumb rubber content also led to improvements in the volumetric properties (bulk density, VTM, VMA, and VFA) of the AC 14 and SMA 14 mixes. In addition, the performance characteristics of the AC 14 and SMA 14 mixes—such as Marshall stability, Marshall flow, and stiffness—increased with the increase in crumb rubber content. However, the AC 14 mixes performed much better than the SMA 14 mixes. The overall research findings suggest that crumb rubber can be used to produce durable and sustainable HMA mixes, with manifold environmental benefits, for use in flexible pavements carrying the heavy traffic load of highways.
30
Ab Manaf, Mohd Badrul Hisyam, Mohd Mustafa Al Bakri Abdullah, Rafiza Abdul Razak, Muhammad Munsif Ahmad, Mustaqqim Abdul Rahim, and Sharifah Nurfarhana Tuan Muda. "Substitution of Fly Ash as Mineral Filler in Wearing Course of Hot Mix Asphalt." Journal of Physics: Conference Series 2129, no. 1 (2021): 012039. http://dx.doi.org/10.1088/1742-6596/2129/1/012039.
Full textAbstract:
Abstract Fly Ash (FA) is one of the sustainable materials to substitute Ordinary Portland Cement (OPC) was found commercialized in construction field but the usage in HMA pavement is limited. Thus, this study is important to promote FA as a sustainable filler instead of using OPC to reduce greenhouse gases. The primary aim is to investigate the Marshall Stability of HMA that incorporating of OPC and FA as filler. In addition, Optimum Bitumen Content (OBC) determination also conducted in this study. Marshall Stability test was conducted based on ASTM 2006 for both mixtures. The parameters gained from the test are the stability, flow, air void in mix (VIM), void filled bitumen (VFB) and stiffness being used to OBC. The OBC for HMA with OPC filler obtained is 5.06% meanwhile for HMA with FA is 4.79%. All Marshall Parameters was complied with of Malaysia Public Work Department (PWD) Standard for both mixtures. The HMA with FA filler give better results for all parameters. Based on OBC percentage, usage of asphalt binder was reduced at 0.29%. Thus, it was more economical if using FA compared with OPC as a filler. Furthermore, HMA with FA filler have better stability and strength as well as lesser deformation with HMA with OPC filler. For the overall, FA have huge potential in substituting other mineral filler to produce better quality of asphalt pavement.
31
Li, Wei, Haitao Yao, Dongjin Yang, et al. "Study on Pavement Performance of Recycled Asphalt Mixture Modified by Carbon Nanotubes and Waste Engine Oil." Applied Sciences 13, no. 18 (2023): 10287. http://dx.doi.org/10.3390/app131810287.
Full textAbstract:
The large amount of recycled asphalt pavement mixture (RAP) generated during renovations has a negative impact on the environment. In recent years, how to rationally recycle and reuse RAP has become a hot research direction in the field of highway construction. However, the recycled asphalt binder has some problems such as instability, easy aging and decreased adhesion. In this paper, carbon nanotubes and waste engine oil were used to modify recycled asphalt binder. Through a high-temperature rutting test, low-temperature bending test and Marshall stability test, the properties of an asphalt mixture with 40% RAP modified by carbon nanotubes and waste engine oil, an asphalt mixture with 40% RAP and an asphalt mixture without RAP were compared and analyzed. The tests showed that 1.5 wt% carbon nanotubes could improve the performance of the old asphalt binder most significantly. After adding 1.5 wt% carbon nanotubes, the high-temperature rutting resistance of the asphalt mixture was increased by 24.3%, and the bending stiffness modulus and the best crack resistance at low temperature increased significantly. In addition, after adding 1.5 wt% carbon nanotubes, the Marshall stability of the waste-engine-oil-modified RAP could be restored to the level of the new asphalt mixture. In summary, carbon nanotubes can improve the high-temperature stability, low-temperature crack resistance and Marshall stability of waste-engine-oil-modified RAP.
32
Abdullah Baqadeem, Abdullah Omar, Khairil Azman Masri, Mazlan Abu Seman, Muzamir Hasan, Othman Che Puan, and Ramadhansyah Putra Jaya. "VOLUMETRIC PROPERTIES OF STONE MASTIC ASPHALT MIXTURE INCORPORATED WITH NANO SILICA AND GLASS FIBER." Suranaree Journal of Science and Technology 32, no. 1 (2025): 010356(1–9). https://doi.org/10.55766/sujst4104.
Full textAbstract:
Stone Mastic Asphalt (SMA) has become integral to contemporary road construction due to its exceptional durability and performance. The stability of SMA, a key determinant of its resistance to deformation under diverse traffic and environmental conditions, underscores its effectiveness. Moreover, the flow characteristics of SMA play a pivotal role in its workability and compaction during construction. This study aims to evaluate the impact of nano silica-modified bitumen on rheological properties, encompassing viscosity, penetration, and softening point. Additionally, the research investigates the influence of glass fiber reinforcement on the mechanical properties of the asphalt mixture, explicitly focusing on volumetric properties and the Marshall stability test. In pursuit of these objectives, pure bitumen underwent modification with (1-5%) nano silica using a high-shear mechanical mixer, and (0, 0.2, 0.4, 0.6, 0.8, and 1%) glass fiber was incorporated into the asphalt mixture. The findings reveal that the asphalt mixture exhibits enhanced Marshall stability, stiffness, and flow values compared to conventional asphalt mixtures. Notably, the modified bitumen containing 4% nano silica and the hybrid asphalt mixture with a 0.4% glass fiber concentration demonstrate the most significant improvements in Marshall stability. The study establishes a positive correlation between the addition of nano silica to bitumen and glass fiber to the asphalt mixture, indicating a beneficial impact on the overall mechanical characteristics of the pavement.
33
Naji, Samer Ali, and Alaa H. Abed. "Stability and Volumetric Properties of Colored Asphalt Mixtures Containing Iron Oxide." Al-Nahrain Journal for Engineering Sciences 24, no. 2 (2021): 130–36. http://dx.doi.org/10.29194/njes.24020130.
Full textAbstract:
The objective of this paper is find the effect of using iron oxide as a filler on the Marshall stability, flow and the volumetric properties of HMA and compared the results with conventional HMA using limestone dust. Three blends were used: coarse, mid and fine with neat bitumen (AC 40-50). One aggregate type (crushed) with two types of fillers: limestone and iron oxide III (α- ) with three different filler content 6%, 8% and 10%. The Marshall mix design was conducted on the three blends and the optimum binder content is computed for each blend. The Marshall stability test results and the volumetric properties analysis showed that increasing the iron oxide content from 6% to 10% increases the stability about 28%, 17% , 16% for the coarse , mid and fine mixtures respectively. This increment in stability of mixtures using iron oxide related to the increment in specific gravity of the mix (Gmb) by (1.3% to 1.5% about 30 to 50 kg/m3). On the other hand, the flow of mixtures is decreased about (5%) for mixes using iron oxide than the ones that used limestone as filler. The fine blend with 10% iron oxide exhibit the highest stability of 13.3 kN. While the coarse blend stability was 10 kN for the same filler type and content. Generally, the Marshall Test results of HMA using iron oxide as filler showed better resistance to plastic deformation, also produce denser HMA with higher stiffness. On the other hand, the volumetric properties analysis showed lesser values as compared with conventional mixture where the void in mineral aggregates and void filled with asphalt has decreased but within the acceptable limits.
34
Geckil, Tacettin, and Perviz Ahmedzade. "Effects of Carbon Fibre on Performance Properties of Asphalt Mixtures." Baltic Journal of Road and Bridge Engineering 15, no. 2 (2020): 49–65. http://dx.doi.org/10.7250/bjrbe.2020-15.472.
Full textAbstract:
In this study, the effects of carbon fibre on improving the performance characteristics of asphalt mixtures were investigated. To this end, four percentages of carbon fibre (0%, 0.3%, 0.5%, and 0.7% by weight of bitumen) were used as an additive in asphalt mixtures. The mechanical properties of prepared mixture specimens were investigated using tests such as Marshall Stability and flow, Indirect Tensile Stiffness Modulus, Creep Stiffness, Indirect Tensile Strength, and moisture resistance. The results of tests applied to asphalt mixtures showed that the carbon fibre additive increased the resistance to shear stress by 25%, the fatigue life by 51% at 40 °C and the permanent deformation resistance by 2.25 times at 60 °C. It also improved the resistance of mixtures to moisture damage by increasing the durability and cohesion of asphalt mixtures. Experimental results indicated that the carbon fibre provided a positive contribution to the performance properties of asphalt pavements.
35
Abdal, Juma Abdulla, Redwan Al-zebaree, and Al-hadidy Ai. "Effects of Compaction Efforts on Tensile Strength Characteristics And Durability of Warm-asphalt Mixture Containing Natural And Synthetic Zeolite." Journal of duhok university 25, no. 1 (2022): 152–63. http://dx.doi.org/10.26682/sjuod.2022.25.1.17.
Full textAbstract:
Many studies have been conducted to evaluate the mechanical properties of warm-mix asphalt (WMA) mixtures using Natural Zeolite (NZ) and Synthetic Zeolite (SZ) without considering the impact of compaction efforts. In this study, the influence of compaction cycles on the mechanical characteristics of WMA mixtures including NZ & SZ additives, is studied and compared with hot mix asphalt (HMA) mixtures. The amount of NZ and SZ used to make the WMA mixes was 5% of the whole asphalt mass. For the research, six WMA mixtures with a penetration grade of 40-50 were designed and compared to HMA traditional mixture. HMA &WMA mixtures were designed with 35, 50 and 75 compaction efforts. Mechanical and durability experiments were performed on HMA and WMA mixtures, involving Marshall stability, Marshall quotient, static indirect tensile strength at 25 and 60°C, and tensile stiffness modulus at 25 and 60°C. Calculating the tensile strength ratio (TSR) to study the moisture susceptibility of the mixes was used to assess their durability. The study indicates that compaction efforts had a considerable impact on the performance of the mixtures. The Natural Zeolite of WMA & Synthetic Zeolite of WMA mixtures display lower Marshall stability and Marshall quotient with greater tensile strength and tensile strength ratio than HMA mixture for 35, 50 and 75 compaction efforts. Increased compaction efforts result in a greater reduction in mechanical and durability characteristics of WMA. The flow values of NZWMA and SZWMA mixtures are larger than HMA mixtures indicating higher strain capacities to achieve failure. All NZWMA and SZWMA mixtures achieve the SCRB standard specifications of 8kN stability, 2-4mm flow, 14 percent VMA, and 85 percent TSR when using the same optimum binder content. Furthermore, the NZAC mixtures show higher performance than SZAC mixtures in terms of stability and strength
36
Fauna Adibroto. "Studi Pemanfaatan Abu Tanah Liat Bakar Asal Gunung Sarik Padang Sebagai Filler Pada Campuran Hot Rolled Sheet (HRS) – WC." Jurnal Ilmiah Poli Rekayasa 9, no. 2 (2014): 23. http://dx.doi.org/10.30630/jipr.9.2.62.
Full textAbstract:
Together with advancement in transportation technology, there is a need to study current technology on transportation. Various research have been conducted on pavement to achieve a strong, durable, and economic construction. One of the constructions is Hot Rolled Sheet – Wearing Course (HRS-WC) or widely known as thin concrete asphaltic layer. Concrete asphalt is a flexible pavement with high structural strength and widely used in Indonesia as road pavement. Therefore the characteristic of the mixture is highly affected by type and percentage of filler in the mixture. In the last two decades, design methods are developed based on analytical method which require stiffness modulus and structural values of the material. During this period many research have been conducted on the methods to improve performance of asphaltic concrete by modification of materials as well as material substitution.The main objective of this study is to evaluate the impact of substitution of standard filler of HRS-WC with clay mineral from Gunung Sarik, Padang, on Marshall properties parameters such as stability, density, VIM, VMA, VFB, flow, and MQ. This aim is achieved by analyzing Marshall properties of the mixtures.Our study shows that the substitution of standard filler with clay mineral from Gunung Sarik with variations from 25%, 50%, 75%, and 100% has no significant impact on optimum asphalt content and other Marshall properties such as Density, VIM, VMA, and Flow. These values do not vary from mixtures using standard filler.
37
Zhu, Chunfeng, Huijin Luo, Wei Tian, et al. "Investigation on Fatigue Performance of Diatomite/Basalt Fiber Composite Modified Asphalt Mixture." Polymers 14, no. 3 (2022): 414. http://dx.doi.org/10.3390/polym14030414.
Full textAbstract:
The fatigue resistance of asphalt mixture is an important indicator to evaluate the durability of asphalt pavement. In order to improve the fatigue properties of asphalt mixture, diatomite and environmental basalt fiber were added. Four types of asphalt mixtures, ordinary asphalt mixture (AM), diatomite modified asphalt mixture (DAM), basalt fiber modified asphalt mixture (BFAM) and diatomite/basalt fiber composite modified asphalt mixture (DBFAM), were chosen, whose optimum asphalt–aggregate ratio, optimum content of diatomite and optimum content of basalt fiber could be determined by Marshall test and response surface methodology (RSM). The multi-functional pneumatic servo Cooper test machine was carried out by a four-point bending fatigue test. Through the comparative analysis of flexural-tensile stiffness modulus (S), initial stiffness modulus(S0), residual stiffness modulus ratio, lag angle (ϕ) and cumulative dissipation energy (ECD), the fatigue resistance of asphalt mixture can be effectively improved by adding diatomite and basalt fiber. Grey correlation analysis was also used to analyze the degree of correlation between the fatigue life and the influencing factors such as VV, VMA, VFA, OAC, S, and ECD. The analysis results indicate that ECD has the greatest impact on the fatigue life of the asphalt mixture.
38
Maleka, Abdulmalik Musa, Ibrahim Abubakar Alkali, and Ramadhansyah Putra Jaya. "The Indirect Tensile Strength of Palm Oil Fuel Ash (POFA) Modified Asphaltic Concrete." Applied Mechanics and Materials 587-589 (July 2014): 1270–75. http://dx.doi.org/10.4028/www.scientific.net/amm.587-589.1270.
Full textAbstract:
The amount and nature of filler in asphaltic concrete mixes significantly affect its design and performance. The use of Palm oil fuel ash (POFA) as filler in asphaltic concrete has been studied with varying degree of success, this study therefore, evaluates the effect of POFA on the indirect tensile strength of asphaltic concrete AC 14. POFA was grained and passed through 75 μm sieve; a number of trial mixes were prepared using the Marshal Mix design procedure with 5% POFA to arrive at asphalt concrete mixtures that fulfill the Marshal criteria. The effects of POFA on stability, flow, stiffness and indirect tensile strength of asphaltic concrete (AC14) mixtures at their respective optimum binder content were evaluated. The results show that Marshall stability, flow, stiffness and indirect tensile strength values generally improved in the POFA modified mix compared with the control. POFA modified sample shows 16% improvement on the indirect tensile strength compared to the control.
39
Mohammed Jasim, Faris, and Ismael Azeez Mohammed. "Comparison of Full Crushed Aggregate (Harsh Mix of Sandstone) and Partially Crushed Aggregate on some Properties of HMA." Polytechnic Journal 12, no. 01 (2022): 135–40. https://doi.org/10.25156/ptj.v12n1y2022.pp135-140.
Full textAbstract:
Aggregate angularity has an important effect on the performance of HMA. More angular aggregates particles can increase the stone-on-stone interlocking and consequently reduce the permanent deformation. The performance of dense graded asphalt mixture is significantly influenced by the angularity, shape, and surface texture of aggregates. This study determines the effect of using Harsh aggregate (full crushed) and normal aggregate in asphalt mixture, and evaluates the volumetric properties of both mixtures. Marshall Test was carried out in order to assess the resistance of stability of mixtures. It was found that a mixture with harsh aggregate needs (0.2 %) more asphalt compared to normal aggregate. Harsh aggregate induced higher stability and stiffness (12%) and (35%) respectively, compared to normal aggregate. VFA and VMA of full crushed aggregate are more than (13%) compared to VMA% of the normal mix. Therefore, it can be concluded that full crushed aggregate with a more angular shape, provides better stability and stiffness, and increases rutting resistance.
40
Rasheed, Suad Kamiran, and Al-hadidy Ai. "Tensile Strength And Moisture Sensitivity of Sulfur Waste in Asphalt Mixtures As An Eco-friendly Filler." Journal of duhok university 25, no. 1 (2022): 164–73. http://dx.doi.org/10.26682/sjuod.2022.25.1.18.
Full textAbstract:
Sulfur waste (SW) materials continue to accumulate in Iraq, posing an expensive disposal and gas emission problem. Utilizing SW as a mineral filler is a cost-effective way to reduce the amount of common filler (calcium carbonate; CaCO3) used and hazardous gas emissions. SW was used to gradually replace a component of the asphalt binder in hot asphalt mixes. The purpose of this research is to explore the use of SW as a mineral filler in the construction of sustainable pavements. Three sulfur waste asphalt concrete (SWAC) mixes with asphalt binder penetration grades of 40–50 were created and compared to the study's CaCO3-asphalt concrete (AC) reference mix. Different percentages of SW (4%, 5%, and 6%) by weight and one AC blend contained a CaCO3 content of 5% (by weight) were prepared. The Marshall stability, Marshall quotient, tensile strength ratio at 25 and 60°C, tensile strength modulus at 25 and 60°C, tensile strength ratio, and tensile stiffness modulus of AC and SWAC mixtures were all determined. Tensile strength, tensile stiffness modulus, tensile strength ratio, and resilience modulus are all decreased in SWAC mixtures. Despite the lower SWAC percentage, tensile strength ratios remain higher than the required minimum of 85 percent when 40-50 penetration grade asphalt is used. Additionally, SWAC combinations have higher flow values, indicating a greater strain capacity to rupture. As long as the proper binder content is maintained, all SWAC combinations meet the ASTM standards for 8kN stability, 2-4mm flow, 5% air voids, and 14% VMA. This study found that SW can be reused and used as a mineral filler in pavement applications at a rate of 4–5% by aggregate weight
41
Zhou, Shijun, Hui Zhang, Jiayin Jia, Menglong Zhao, Qin Ai, and Lei Tong. "Experimental Study on Pavement Performance of Warm High Modulus Mixture WHMM-13." Baltic Journal of Road and Bridge Engineering 19, no. 3 (2024): 1–16. http://dx.doi.org/10.7250/bjrbe.2024-19.640.
Full textAbstract:
In order to solve the dusting and rutting problems of hot mix asphalt mixture during construction and operation, rutting test, bending test, Marshall stability test, freeze-thaw splitting test, uniaxial compression dynamic modulus test, overlay test, and four-point bending fatigue life test are applied on WHMM-13 to study the high-temperature stability, low-temperature cracking resistance, water stability, anti-reflection crack performance and fatigue durability in comparison with HMM-13. The results show that, compared to HMM-13, the dynamic stability and dynamic modulus (45 ℃, 10 Hz) of WHMM- 13 are improved by 10.0% and 47% respectively, and the rutting depth is reduced by 27.3%, indicating that the high temperature stability of WHMM-13 has been greatly improved. As for low temperature cracking resistance, the bending failure strain, stiffness modulus, flexural tensile strength and rupture energy of WHMM-13 are slightly lower than those of HMM-13. As for water stability, the residual stability of WHMM-13 in immersion Marshall test is 87.5%, and the splitting strength is 82.3%, both higher than that of HMM-13. As for anti-reflection crack performance, the total tensile rupture energy of WHMM-13 is 2.32 times that of HMM-13, with cracking resistance index (CRI) increased by 25%, which shows that WHMM-13 has better strength, can effectively prevent the crack from spreading and effectively improve the cracking resistance capacity of asphalt pavement. As for fatigue durability, the fatigue life of WHMM-13 is 5.4% lower than that of HMM-13, with bending stiffness modulus and cumulative dissipation energy reduced by 11.3% and 2.8% respectively, indicating that the fatigue durability of WHMM-13 is slightly reduced.
42
Kamran, Muhammad, Muhammad Tariq Khan, Diyar Khan, Mohd Rosli Mohd Hasan, Noman Khan, and Mati Ullah. "Ocena doświadczalna mieszanek mineralno-asfaltowych po częściowym zastąpieniu wypełniacza popiołami dennymi z elektrowni węglowej." Roads and Bridges - Drogi i Mosty 22, no. 2 (2023): 167–79. http://dx.doi.org/10.7409/rabdim.023.008.
Full textAbstract:
The purpose of this study is to evaluate the performance of hot mix asphalt (HMA) prepared with coal bottom ash (CBA) as an alternative mineral filler. In this study, the effect of CBA on rutting, stiffness and fatigue resistance was experimentally evaluated. Combinations of conventional filler (stone dust) with different percentages of CBA (at 1.5%, 3%, and 4.5% by volume) were adopted. The HMA samples were prepared and tested using the Marshall mix design method. Following the Asphalt Institute MS-2 and the Pakistani National Highway Authority (NHA) General Specifications, sixty samples of HMA were compacted; stability tests at varying bitumen contents (3.5%, 4.0%, 4.5%, 5.0%, and 5.5%) were used to determine the optimum bitumen content (OBC) in the mixture for each percentage of CBA in the filler. For 0%, 1.5%, 3%, and 4.5% CBA, the optimum bitumen contents of 4.27%, 4.47%, 4.53%, and 5.0% were obtained, respectively. They were used throughout the study. Three samples with the optimum binder content were made for each of the four analysed CBA proportions. The wheel tracker test was run on 12 OBC samples, and the dynamic modulus test was run on 12 OBC samples. The Marshall stability and flow test results showed that the samples prepared with 3% CBA as filler and an OBC of 4.53% satisfied the NHA requirements for flexible pavement. It was noted that CBA greatly improves the rutting resistance and stiffness of asphalt mixtures. It also improved the fatigue life. Therefore, adding up to 3% CBA by volume to stone dust used as filler in asphalt concrete can minimize the need for stone dust and provide a suitable method of CBA disposal.
43
Putri, Elsa Eka, Yosritzal Yosritzal, Akhyarul-An Agusyaini, and Wiwik Budiawan. "Evaluating the effect of using shredded waste tire in the asphalt concrete-binder coarse on Marshall parameters." SINERGI 26, no. 1 (2022): 107. http://dx.doi.org/10.22441/sinergi.2022.1.014.
Full textAbstract:
Shredded Waste Tires are industrial materials that can be used in the asphalt mixture. The use of tires increases every day, considering the number of vehicles that grow from year to year. Using used tires is highly recommended for efforts to reduce waste that will harm the environment. The research aims to see the effect of adding shredded tires in a pavement mixture based on Marshall Value. The AC-BC pavement layer is not directly in contact with wheel load. Still, it must have sufficient thickness and stiffness to minimise stress or strain from traffic loads continuously transferred from the top of the pavement. The most important characteristic of the AC-BC is its stability. The optimum asphalt content value in the AC-BC mixture is 6.81%, mixed with various shredded waste tires. The Asphalt Concrete-Binder Course blended with 1.5%, 3.5%, 5.5% and 7.5% of the various shredded waste tire. The optimum shredded tire content was obtained at 3.5%, with the stability value increased by 2.1% from 1581.98 to 1614.88 kg, with a flow value of 5.43 mm, and a Marshall Quotient value of 297.4 kg/mm.
44
Wróbel, Michał, Agnieszka Woszuk, and Wojciech Franus. "Laboratory Methods for Assessing the Influence of Improper Asphalt Mix Compaction on Its Performance." Materials 13, no. 11 (2020): 2476. http://dx.doi.org/10.3390/ma13112476.
Full textAbstract:
Compaction index is one of the most important technological parameters during asphalt pavement construction which may be negatively affected by wrong asphalt paving machine set, weather conditions, or the mix temperature. Presented laboratory study analyzes the asphalt mix properties in case of inappropriate compaction. The reference mix was designed for AC 11 S wearing layer (asphalt concrete for wearing layer with maximum grading of 11 mm). Asphalt mix samples used in the tests were prepared using Marshall device with the compaction energy of 2 × 20, 2 × 35, 2 × 50, and 2 × 75 blows as well as in a roller compactor where the slabs were compacted to various heights: 69.3 mm (+10% of nominal height), 66.2 mm (+5%), 63 mm (nominal), and 59.9 mm (−5%) which resulted in different compaction indexes. Afterwards the samples were cored from the slabs. Both Marshall samples and cores were tested for air void content, stiffness modulus in three temperatures, indirect tensile strength, and resistance to water and frost indicated by ITSR value. It was found that either insufficient or excessive level of compaction can cause negative effect on the road surface performance.
45
Al-Suleiman, Turki I., Mohammed Taleb Obaidat, Ghassan T. Abdul-Jabbar, and Taisir S. Khedaywi. "Field inspection and laboratory testing of highway pavement rutting." Canadian Journal of Civil Engineering 27, no. 6 (2000): 1109–19. http://dx.doi.org/10.1139/l00-037.
Full textAbstract:
The main objective of this research was to investigate the contribution of pavement characteristics, traffic, and physical and mechanical properties of asphaltic mixtures to highway pavement rutting. A total of 51 pavement sections from the rural highway network in Jordan were selected for a case study. The average rut depths for these sections were measured and three cores were drilled for comprehensive laboratory testing. The investigation was performed using four approaches. The first approach considered pavement characteristics represented by surface thickness, last overlay thickness, pavement age, and subgrade California bearing ratio. The average annual equivalent single axle load was also included in this approach. The second approach included Marshall test parameters such as stability, flow, stiffness, and Marshall modulus. The third approach dealt with the effect of mixture air voids on rutting. The variables examined in this approach include air void content within the ruts, voids between ruts, voids near the pavement centerline, and the difference between centerline and rut voids. The fourth approach considered the dynamic permanent deformation characteristics of the pavement surface layer represented by the dynamic modulus. Regression analysis techniques were employed to develop statistical relationships between average rut depths and the parameters examined in each individual approach. The combined effect of these significant parameters on pavement rutting was also examined for prediction purposes. Rutting formation was found to be most dependent on the traffic loading, dynamic modulus of the bituminous mixture and its susceptibility to further compaction, and foundation soil strength.Key words: pavement rutting and characteristics, Marshall test, traffic loading, air voids, static creep, dynamic permanent deformation.
46
Medeiros, Marcelo S., Ghassan R. Chehab, and Mansour Solaimanian. "Investigation of Ultra-Rapid-Setting Emulsion for Tack Coat Applications." Transportation Research Record: Journal of the Transportation Research Board 2293, no. 1 (2012): 80–88. http://dx.doi.org/10.3141/2293-10.
Full textAbstract:
The presence and the proper application of bituminous tack coat between pavement layers are critical elements to the effective functionality and longevity of multilayered flexible pavements. This study assessed the performance of a newly developed ultra-rapid-setting (URS) emulsion as a tack coat, with particular emphasis on its adhesive properties. The experimental testing matrix included physical and rheological tests consistent with relevant specifications of the Pennsylvania Department of Transportation and Superpave® binder grading. Bonding performance was evaluated on the basis of results from shear tests conducted with a modified Marshall setup and the Superpave shear tester (SST). The results revealed that the new product set faster than the typical cationic rapid-setting emulsion (CRS-1h) used as a control tack coat in this study. The physical and rheological properties of the URS residue indicated a reduction in density, stiffness, and viscosity. The changes in the properties of the residue, however, were not significant enough to alter its performance grade. Results from the modified Marshall test at 25°C and SST tests at 25°C and 51°C revealed similar values for shear strength for both types of emulsions. The strengths of the specimens with the CRS-1h tack coat were slightly higher than those of the URS when tested in the modified Marshall setup, while the opposite was true for the SST setup at 51°C. This study demonstrated no statistical difference between the performances of the two products regarding adhesion for all conditions and tests performed.
47
Kukiełka, Jerzy, Agnieszka Woszuk, and Wojciech Franus. "Warm mix asphalt with zeolite additions." Budownictwo i Architektura 13, no. 4 (2014): 161–68. http://dx.doi.org/10.35784/bud-arch.1754.
Full textAbstract:
In this study, preliminary results of zeolite application to reduce the compaction temperature of mix asphalt are presented and discussed. The reference mix was an asphalt concrete AC 16 W containing 35/50 penetration grade bitumen and designed for binder course. Two types of the zeolites were used for tests: natural zeolite klinoptilolit and synthetic NaP1 one. The optimal amount of zeolite addition was determined on the basis of the compactibility test results in the Marshall compactor as well as in the gyratory compactor. The results of stiffness modulus and waterproofness tests confirm the possibility to reduce the compaction temperature of asphalt mixes with zeolite additions to 1300C level.
48
Quintana, Hugo Rondon, Saieth Chaves-Pabón, and Diego A. Escobar. "Evaluation of a Warm Mix Asphalt Manufactured with Blast Furnace Slag." Modern Applied Science 12, no. 12 (2018): 28. http://dx.doi.org/10.5539/mas.v12n12p28.
Full textAbstract:
The study evaluated the response under monotonic loading (Marshall and indirect traction) and the resistance to moisture damage and abrasion of a warm mix asphalt (WMA) manufactured with an additive called HUSIL, when the coarse fraction of the aggregate was replaced by a blast furnace slag (BFS). In conclusion, it is reported that the additive is capable of reducing the manufacturing temperature of the asphalt mixture by 30 ° C. Additionally, the BFS can be used as a partial substitute for the coarse fraction of aggregates in WMA, since when replacing it in 21%, the mixture reach a significant increase in stiffness, resistance to moisture damage, and similar resistance to abrasion with respect to the control asphalt mixture.
49
Li, Wei, Peng Xiang Sun, and Chun Xiao Zhang. "Laboratory Test Study on Asphalt Concrete with Steel Slag Aggregates." Applied Mechanics and Materials 152-154 (January 2012): 117–20. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.117.
Full textAbstract:
To investigate the validity of steel slag as aggregates in road surface dressing, a series of tests for asphalt concrete mixed with asphalt cement and steel slag aggregates particles are performed using Marshall method. Through the statistical analysis of the test data, and comparison the data with those of asphalt macadam mixture, the asphalt concrete mixed with asphalt cement and steel slag aggregates have very large stiffness, high resistance to deformation and high resistance to cracking. If meeting the requirements of the code in china for asphalt macadam mixture, steel slag can be applied in road surface dressing instead of stone aggregates, but also bring remarkable economic effect and has broad application prospect.
50
Rondón-Quintana, Hugo, Saieth Chaves-Pabón, and Carlos Zafra-Mejía. "Performance characteristics and mechanical resistance of a hot mix asphalt using gilsonite and blast furnace slag." Przegląd Naukowy Inżynieria i Kształtowanie Środowiska 28, no. 4 (2019): 503–15. http://dx.doi.org/10.22630/pniks.2019.28.4.46.
Full textAbstract:
Replacing natural aggregates (NA) for blast furnace slag (BFS) is seen as a technique that is beneficial for the environment. Additionally, in high temperature climates, rigidizing the asphalt by employing gilsonites (G) could be an alternative in order to increase rutting resistance. This study substituted in volume, part of the coarse fraction of NA for BFS in a hot mix asphalt (HMA) that employed asphalt modified with G in wet process. Physical properties of BFS are presented, as well as its chemical and mineral compositions. Additionally, physical properties of asphalt modifi ed are shown. In regards to HMAs, their resistance under monotonic load (Marshall test and indirect tensile strength test), cyclic (resilient modulus, permanent deformation and fatigue) and moisture damage (tensile strength ratio – TSR) was evaluated. All HMAs were manufactured employing the same asphalt content from the control mix. An ANOVA variance analysis was conducted. Based on ANOVA, when the NA volume is substituted with BFS, Marshall stability/ /flow relation significantly drops. However, when such substitution is carried out using G-modified asphalt, resistance under monotonic load, stiffness under cyclic load, resistance to permanent deformation and moisture damage notably increase. Fatigue resistance also increases but such increase is not statistically significant.