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Journal articles on the topic 'Modified asphalt concrete'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

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1

Kim, Kwang W., Seung Jun Kweon, Young S. Doh, and Tae-Soon Park. "Fracture toughness of polymer-modified asphalt concrete at low temperatures." Canadian Journal of Civil Engineering 30, no. 2 (April 1, 2003): 406–13. http://dx.doi.org/10.1139/l02-101.

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The fracture toughness of asphalt concrete increases at low temperature and then decreases at temperatures below a certain level. Some polymers are known to have the property of improving the temperature susceptibility of asphalt binder at low temperatures. Therefore, this study evaluated the fracture toughness (KIC) of some polymer-modified asphalt concretes. Low-density polyethylene (LDPE), styrene–butadiene–styrene (SBS), and a mixed polymer of LDPE and SBS were used in this study. The fracture toughness KIC of normal asphalt concrete was compared with that of polymer-modified asphalt (PMA) concrete, and the effectiveness of polymer modification against falling values of KIC was evaluated at low temperatures. The results showed that PMA concretes, in general, showed better KIC than normal asphalt concretes, and the temperature at which the highest KIC was obtained was lower than that in the case of normal asphalt concrete. Therefore, the PMA concretes evaluated in this study had better fracture resistance than normal asphalt at low temperatures.Key words: asphalt concrete, polymer-modified asphalt, PMA, fracture toughness, differential thermal contraction, low-temperature damage.
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2

Jiang, Rong-Bin, Jyh-Dong Lin, and Deng-Fong Lin. "Rheology of Asphaltic Binders and Their Effects on Asphalt Concrete." Transportation Research Record: Journal of the Transportation Research Board 1535, no. 1 (January 1996): 74–80. http://dx.doi.org/10.1177/0361198196153500110.

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The rheology of asphaltic binders and their effects on asphalt concrete are discussed with the intention of improving the correlation between conventional mix design results and pavement performance. Test results show that mineral fillers increase the viscosity and pseudoplasticity of asphalts but do not always decrease the tan 8, except apparently at a lower frequency or at a higher temperature. Mineral fillers are also hard to mix homogeneously and quickly with asphalts. All these effects become more pronounced with a continuously increasing filler to asphalt (F/A) ratio, and uses are limited to a lower F/A range unless the processing temperature is adjusted properly. The abnormal drop in tan δ improves for some modified asphalts (e.g., air-blown or polymerized asphalt).
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3

Zuluaga-Astudillo, Daniel Alberto, Hugo Alexander Rondón-Quintana, and Carlos Alfonso Zafra-Mejía. "Mechanical Performance of Gilsonite Modified Asphalt Mixture Containing Recycled Concrete Aggregate." Applied Sciences 11, no. 10 (May 13, 2021): 4409. http://dx.doi.org/10.3390/app11104409.

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Hot-mix asphalts exposed to hot weather and high traffic volumes can display rutting distress. A material that can be used to increase the stiffness of asphalt binders is gilsonite. On the other hand, from an environmental point of view, the virgin natural aggregates of asphalt mixtures can be replaced with recycled concrete aggregates. For these reasons, this study modified the asphalt binder with gilsonite by wet-process to improve rutting resistance, and replaced (by mass and volume) part of the coarse fraction of the aggregate with recycled concrete aggregate in two hot-mix asphalts with different gradations. Unlike other studies, a larger experimental phase was used here. Marshall, indirect tensile strength, resilient modulus, permanent deformation, fatigue resistance, and Cantabro tests were performed. An ANOVA test was carried out. If the replacement of the virgin aggregate by recycled concrete aggregates was made by volume, both materials (gilsonite and recycled concrete aggregate) could be used in hot-mix asphalts for thick-asphalt layers in high temperature climates and any level of traffic. The use of both materials in hot-mix asphalts is not recommended for thin-asphalt layers in low temperatures climates. It is not advisable to replace the aggregates by mass.
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4

Radziszewski, Piotr. "MODIFIED ASPHALT MIXTURES RESISTANCE TO PERMANENT DEFORMATIONS." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 13, no. 4 (December 31, 2007): 307–15. http://dx.doi.org/10.3846/13923730.2007.9636451.

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Permanent deformations, primarily in the form of ruts, are one of the basic asphalt pavement damages impairing its service properties. Application of appropriate asphalt mixtures and binder modification are effective methods for improving asphalt courses resistance. While being manufactured, stored, fitted into a road pavement and during long term service, bitumen binders and asphalt mixtures are subject to continuous unfavourable ageing processes during which pavement courses characteristics change considerably, resistance to permanent deformations being among them. This article presents rut and dynamic creep test results of concrete, SMA (stone mastic asphalt), MNU (thin courses of non‐continuous grain mixtures), Superpave mixture and porous asphalt mixture of two air void content percentages: 15 %, 20 %. Asphalt concrete mixtures, MNU's and porous asphalt mixtures contained elastomer, plastomer and fine rubber modified binders. Samples for laboratory rut tests were made by slab compaction because this method, as the author's previous research had shown, was the closest to ‘in‐situ’ conditions. Resistance to permanent deformations of the examined specimens was evaluated before aging, after technological aging (short term ageing) and after service ageing (long‐term ageing). The test results show that resistance to permanent deformations depends on the kind of asphalt mixture and binder applied. Concrete asphalts with fine rubber modified bitumens and concrete asphalts with 7 % polymer modified binders as well as SMA's and Superpave mixtures with unmodified binders appeared to be most resistant to permanent deformations after a long‐term laboratory ageing. It was proved that the overall evaluation of resistance to permanent deformations could be obtained by rut and creep testing of asphalt mixtures exposed to short‐ and long‐term ageing. Simultaneous determining 4 parameters: maximum rut depth after short‐term ageing, rutting coefficient after operational ageing, stiffness creeping modulus after long‐term ageing and cumulated deformation after short‐term ageing, facilitates full characteristics of modified asphalt mixes designed to be built in the wearing course of a road pavement.
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5

Chen, Yuan Zhao, and Zhen Xia Li. "High Temperature Stability of Modified Asphalt Concrete." Applied Mechanics and Materials 438-439 (October 2013): 391–94. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.391.

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According to high temperature weak stability of common asphalt mixture, rutting tests of diatomite modified asphalt mixture, modified lake asphalt mixture, modified rock asphalt mixture and common asphalt mixture are carried out. Changes of dynamic stability for common asphalt mixture compared with modified asphalt mixtures are comparatively analysed. The results show that compared with common asphalt mixture, rutting resistances of diatomite modified asphalt mixture, modified lake asphalt mixture and modified rock asphalt mixture are greatly improved. It is proposed that those kinds of modified asphalt mixture are adopted in asphalt pavement of large longitudinal slope section.
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6

Li, Yun Liang, Yi Qiu Tan, and Liang Meng. "Application Study on High Modulus Asphalt Concrete in Bridge Pavement." Advanced Materials Research 243-249 (May 2011): 4244–47. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.4244.

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A type of high modulus asphalt was prepared by mixing modifier into SBS modified asphalt and used for confecting HMAC-16 high modulus asphalt concrete with finished product of modified asphalt from Liaohe oil field. This paper investigates pavement performance of high modulus asphalt concrete and its practical application in bridge pavement. Results obtained by application in practical project show that the high modulus asphalt concrete is provided with outstanding high-and-low temperature performance and water damage resistance which are suitable for bridge pavement.
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7

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.

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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.
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8

Wu, Shao Peng, Tian Gui Liu, Ling Pang, Ting Wei Cao, and Pan Pan. "Study of High Temperature Performance and Low Temperature Property on Layered Silicate Modified Asphalt Concrete." Key Engineering Materials 509 (April 2012): 189–93. http://dx.doi.org/10.4028/www.scientific.net/kem.509.189.

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Montmorillonite (MMT), a typical layered silicate, has been widely used to prepare modified asphalt. This paper investigates the high temperature performance and low temperature property on layered silicate modified asphalt concrete. The control concrete is prepared by base asphalt. Meanwhile, three-point bending, conventional and SHRP rutting tests are used to compare the properties of the two types of asphalt concrete. The results of conventional and SHRP rutting tests show that the modified asphalt concrete exhibits a better high temperature performance than the control concrete. And the maximum bending strength of modified asphalt concrete is higher than that of control concrete at the same temperature. It can be concluded that both the high temperature performance and low temperature property of asphalt concrete has been improved efficiently by utilization of layered silicate modified asphalt.
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9

Guo, Xuedong, Mingzhi Sun, Wenting Dai, and Shuang Chen. "Performance Characteristics of Silane Silica Modified Asphalt." Advances in Materials Science and Engineering 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/6731232.

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At present there are many kinds of fillers and modifier used for modified asphalt, but the effect of modifier differs in thousands of ways; most of them can increase the high temperature performance of asphalt, but the modified effect of low-temperature crack resistance, water stability, and antifatigue performance is different. Aiming at the subsistent problems, this paper innovatively puts forward the idea of taking the silane silica (nanosilica modified with silane coupling agent) as filler to develop one kind of modified asphalt concrete which has excellent comprehensive performance based on the idea of enhance the whole performance of asphalt concrete and interface consolidation strength between aggregate and asphalt at the same time. The best mixing amount of silane silica and the production process of modified asphalt were conducted by contrasting the test date as penetration, viscosity, and softening point; the aging of asphalt and modified asphalt was analyzed by TG test, the superiority of silane silica modified asphalt is more clearly understandable by chemical analysis results. Meanwhile it is proved that silane silica has positive effect to improve the mixture of high and low temperature performance, water stability, and aging resistance through a series of road performance tests.
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10

Handayani, Ani Tjitra, Bagus Hario Setiaji, and Sri Prabandiyani. "The Use of Natural Zeolite as an Additive in Warm Mix Asphalt with Polymer Modified Asphalt Binder." International Journal of Engineering Research in Africa 15 (April 2015): 35–46. http://dx.doi.org/10.4028/www.scientific.net/jera.15.35.

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Asphalt Concrete mixture of polymer modification are used to reduce the damage early and increasing the durability of pavement to various damage such as permanent deformation, cracking due to temperature changes, fatigue During this process the polymer asphalt mixing using Hot Mix Asphalt / HMA. In accordance with the name and nature of hot mix asphalt, require high enough heating temperature on the Asphalt Mixing Plant (AMP), and also requires a high temperature compaction. As a result, it takes quite a lot of fuel so produced a large exhaust emissions. Emissions generated during the mixing process and compaction of HMA is a challenge for the environment. Some countries have developed a method of asphalt mixture to overcome this by using Warm Mix Asphalt technology. Warm Mix Asphalt is the technology of mixing and compaction temperatures of asphalt mixtures using mixing and compaction temperatures lower than Hot Mix Asphalt. Decreasing the mixing and compaction temperatures by adding additives to the asphalt mixture. Types of additives that have been widely used and developed for Warm Mix Asphalt them is the use of synthetic zeolites with various trademarks such as Aspha-min (R), Sasobit(R) dan Advera(R). In this paper the synthetic zeolite will be replaced by natural zeolite as an additive to be mixed with a mixture of Polymer Modified Asphalt Concrete. This study uses laboratory testing, using aggregate materials from Subang, West Java, Asphalt Elastomer Polymers, natural zeolite mineral mordenite sourced from Bayat, Central Java, Indonesia. Tests using a mixture Marshall Test. Marshall test results stated that the levels of natural zeolite 1% can reduce the temperature of mixing and compaction temperatures on Polymer Modified Concrete Asphalt mix 30°C, lower than the temperature of the mixture of Polymer Modified Asphalt Concrete without zeolite. Keywords: additive, Natural Zeolites, Warm Mixed Asphalt, Polymer Modified Asphalt Concrete
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11

Mieczkowski, Paweł, Robert Jurczak, and Bartosz Budziński. "Asphalt concretes with metal-organic frameworks for highways and expressway road surfaces." Transportation Overview - Przeglad Komunikacyjny 2018, no. 11 (November 1, 2018): 85–93. http://dx.doi.org/10.35117/a_eng_18_11_09.

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The aim of performed research and analysis is the evaluation of the influence of metal-organic catalyst (MOC) on the properties of asphalt concretes designed for KR5-7 traffic load. The anhydrous iron (III) chloride was added as a metal-organic catalyst in the amount of 2,5% of asphalt mass. The study determined the properties of asphalt concrete with modified binder (70/100+2,5% FeCl3) and referential asphalt concrete with typical binder 35/50. The test included determination of water and freeze-thaw resistance (ITSR) and resistance to permanent deformation. Additional basic tests were performed to compare the properties of modifies, the 70/100 and 35/50 asphalt. The research was performed for three binder conditions: before aging, short-term aging in accordance with RTFOT and PAV long-term aging. The test results allowed to determine the IP penetration index. Additionally, for 35/50 asphalt and modified binder the dynamic viscosity was determined before and after aging in accordance with RTFOT. The addition of metal-organic catalyst increased the resistance of the asphalt concrete to permanent deformation without changing its water and freeze-thaw resistance. In case of the 70/100 asphalt the addition of MOC improved the hardness (especially after short- and long-term aging) and influenced the rheology.
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12

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.

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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.
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13

Onishchenko, Artur, Larysa Stolyarova, and Andrii Bieliatynskyi. "Evaluation of the durability of asphalt concrete on polymer modified bitumen." E3S Web of Conferences 157 (2020): 06005. http://dx.doi.org/10.1051/e3sconf/202015706005.

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For research conduction to prepare the modified bitumen and the polymer asphalt concrete there were used the stone materials from the Malynsky enterprise and the mineral powdered lime, the petroleum paving bitumen of 60/90 grade from the Mozyrsky enterprise, and the Butanol NS 198 modifier. Conducted research showed that the asphalt concretes produced using the Butonal NS 198 meet the requirements to hot asphalt concrete and have higher strength and durability parameters. The polymer asphalt concrete design characteristics values change in sufficiently wide range depending on the binding agent amount shows the possibility of active regulation of its properties under the designing actual conditions. Higher water resistance and extended durability of these PACs ensure the preconditions of their use in different regions of Ukraine. Research results show that to get the maximum effect from the modifying agent application it is desirable to perform the scientist support during its field use and also the operational conditions monitoring to collect statistic data and carry out the necessary corrections to obtain the best results.
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14

Nykypanchuk, Mykhailo, Yurii Hrynchuk, and Mykola Olchovyk. "Effect of Modified Bitumen on Physico-Mechanical Properties of Asphalt Concrete." Chemistry & Chemical Technology 7, no. 4 (December 15, 2013): 467–70. http://dx.doi.org/10.23939/chcht07.04.467.

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15

Cheng, Yong Chun, Hui Li Ma, Qing Lin Guo, Chun Xu, and Peng Zhang. "Experimental Investigation on Fatigue Property of Asphalt Concrete Modified by Diatomite-Glass Fibers." Applied Mechanics and Materials 236-237 (November 2012): 38–42. http://dx.doi.org/10.4028/www.scientific.net/amm.236-237.38.

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Diatomite and glass fiber are used for modifying asphalt concrete in this paper. Besides, wet and dry processes are adopted to achieve the composite modified asphalt concrete. Meanwhile, experimental investigation has been done on its fatigue properties and dynamic mechanical property, it indicates that diatomite-glass fiber modified asphalt concrete has a better capacity to resist fatigue damage. Compared with matrix asphalt concrete, the modified asphalt concrete has higher fatigue life. Thus, its mechanical parameter of fatigue property changes obviously so as to provide a reference basis for the durability design of pavement materials.
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16

Khamad, Rami. "Estimation of fuel resistance of asphalt concrete and polymer modified asphalt concrete." Eastern-European Journal of Enterprise Technologies 3, no. 11(75) (June 24, 2015): 35. http://dx.doi.org/10.15587/1729-4061.2015.43713.

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17

Shukla, Manoj, Devesh Tiwari, and K. Sitaramanjaneyulu. "Performance Characteristics of Fiber Modified Asphalt Concrete Mixes." International Journal on Pavement Engineering & Asphalt Technology 15, no. 1 (May 1, 2014): 38–50. http://dx.doi.org/10.2478/ijpeat-2013-0007.

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ABSTRACT Asphalt binder modification is one of the approaches taken to improve pavement performance. In addition it may also be improved through the addition of fibers to Asphalt mix that enhances material strength and fatigue characteristics while adding ductility. Due to their inherent compatibility with Asphalt concrete and excellent mechanical properties, fibers offer an excellent potential for modification of Asphalt concrete mix. To investigate the behavior of Fiber Modified Asphalt Concrete Mixes (FMACM), a preliminary study has been done to determine the feasibility of modifying the behavior of a Asphalt Concrete (AC) mixture through the use of Glass fiber and Polyester fiber. The purpose of this study was to identify and understand the factor that is responsible for improving the behavior of FMACM. Asphalt concrete samples were prepared and tested in the laboratory to evaluate the various mixture characteristics. The conclusions drawn from the study on testing of fiber-modified mixes are that fiber modified Asphalt mixtures have shown increased stiffness and resistance to permanent deformation. Fatigue characteristics of the mixtures were also improved. Fibers used in the study were of high tensile strength therefore test results of FMACM have shown higher indirect tensile strength and improved skid resistance for paving applications.
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18

Shekhovtsova, Svetlana Yur’evna, and Marina Alekseevna Vysotskaya. "Effect of carbon nanotubes on the properties of pmb and asphalt concrete." Vestnik MGSU, no. 11 (November 2015): 110–19. http://dx.doi.org/10.22227/1997-0935.2015.11.110-119.

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In the modern world nanotechnologies are an integral part of successful and progressive development of all the areas of activity. Materials science is not an exception. The authors studied the method of nanomodification and its influence on the performance properties of polymer-modified binder (PMB) and asphalt concrete, produced on their basis. It is established that nanomodified PMB are less susceptible to aging, which is a consequence of the processes of peptization of asphalt-resin complexes (ARC) in the structure of the modified binder and the crosslinking with the polymer matrix. It is revealed that nanotubes (SWCN or MWCN) used as a modifier, act as crosslinking agent and the inhibitor of the aging process in a PMB. The influence of nanomodified PMB on strength and deformation properties of asphalt concrete is investigated. It was found out that the use of modified binder in the asphalt concrete mixtures enhances the water resistance of asphalt concrete, heat resistance and shear-resistance.
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19

Zhurinov, M. Zh, B. B. Teltayev, Ye D. Amirbayev, and A. O. Elschibayev. "COMPARATIVE ANALYSIS OF LOW TEMPERATURE STRENGTH OF MODIFIED ASPHALT CONCRETES." NEWS of National Academy of Sciences of the Republic of Kazakhstan 6, no. 444 (December 15, 2020): 261–67. http://dx.doi.org/10.32014/2020.2518-170x.155.

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A comparative analysis has been performed in this work for low temperature strength of 31 types of the conventional (non-modified) and modified road asphalt concretes. The neat bitumens of the grades BND 70/100, BND 100/130 and BND 130/200 have been produced by the Pavlodar petrochemical plant from the crude oil of the Western Siberia (Russia) by the method of direct oxidation and they satisfy the requirements of the standard ST RK 1373-2013. The polymers Elvaloy 4170, Elvaloy AM, Kraton, Calprene 501, Butonal NS, SBS (L 30-01 A), KUMHO KTP and crumb rubber have been used for the modification of the bitumens. The modification of the bitumens has been performed in the laboratory of Kazakhstan Highway Research Institute. The modified bitumens satisfy the requirements of the standard ST RK 2534-2015. The conventional and modified asphalt concretes satisfy the requirements of the standards ST RK 1225-2019, ST RK 1223-2019, ST RK 2028-2010, ST RK 2373-2019 and GOST 31015-2002. The strength of the asphalt concretes at uniaxial direct tension at a constant strain rate of 1 mm/min at the temperatures of -10 °С, -20 °С and -30 °С determined in the device TRAVIS under the standard EN 2697-46 has been accepted as a characteristic of their low temperature strength. It is found out that various modifiers affect the asphalt concrete strength in different ways: a degree of impact depends both on a type of an asphalt concrete and a modifier, as well as on a negative temperature value. Some modifiers increase, and some of them decrease the strength of the asphalt concretes at low temperatures compared with the original asphalt concretes. Among the modifiers the polymer Elvaloy AM has been found to be the most efficient at low temperatures. The asphalt concretes of type B with the bitumens of grades BND БНД 100/130 and BND 130/200 at modification by the polymer Elvaloy AM had the biggest strength at all the considered low temperatures: at -10 ºC – 6.79 MPa and 6.43 MPa; at -20 ºC – 7.57 MPa and 7.87 MPa; at -30 ºC – 7.35 MPa and 8.86 MPa. The stone mastic asphalt concretes 15 and 20 with the polymers and without them at all the considered low temperatures practically had the strength not higher than the basic asphalt concretes of type B with neat (original) bitumens of grades BND 100/130 and BND 130/200.
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20

Estakhri, Cindy K., and Donald Saylak. "Sulfur-Modified Bottom Ash as Aggregate in Hot-Mix Asphalt Concrete: Field Demonstration Project." Transportation Research Record: Journal of the Transportation Research Board 1723, no. 1 (January 2000): 57–65. http://dx.doi.org/10.3141/1723-08.

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The use of bottom ash in road construction as an aggregate for both roadway surfaces and base courses has been limited because of its absorbency and friability. The former tends to increase asphalt binder demand, and the latter adversely affects its ability to withstand the crushing effects of traffic loads. Nevertheless, bottom ash is lighter in weight and generally much cheaper than conventional quality aggregates such as crushed limestone, sand, and gravel. Research was undertaken to upgrade the load-bearing characteristics of bottom ash and maximize its use in asphaltic concrete mixtures through sulfur modification. The process essentially coats the ash with liquid sulfur, which, upon cooling, fills the voids on the surface of the particles while increasing their crushing resistance. The results of laboratory investigations indicate that asphaltic concrete mixture designs in which bottom ash represents 50 to 100 percent of the aggregate fraction can be achieved. Sulfur-modified bottom ash (SMBA) mixtures compare favorably with typical Texas Department of Transportation surface course mixtures in terms of strength, durability, and asphalt demand. Results of a field demonstration project in which SMBA was incorporated into hot-mix asphalt concrete are presented. An asphalt batch plant was successfully used to incorporate the sulfur into the bottom ash and produce the hotmix asphalt concrete. The mixture was successfully placed as a 50-mm (2-in.) overlay on an existing asphalt surface at the entry to the asphalt plant facility, and adequate density was achieved with standard compaction equipment. The SMBA hot-mix overlay is currently under traffic by heavy haul trucks entering the plant facility, and early indications of performance are good.
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21

Shekhovtsova, S. Yu. "Features of the Formation of Properties of Stone-Mastic Asphalt Concrete Based on a Warm Polymer Modified Binder." Materials Science Forum 992 (May 2020): 200–205. http://dx.doi.org/10.4028/www.scientific.net/msf.992.200.

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Stone mastic asphalt concrete is one of the main types of asphalt concrete used for the construction of road surfaces. The quality, reliability and longevity of which depends on road safety of vehicles. To reduce the intensity of aging processes occurring at the stage of production and laying of asphalt concrete, "green" technologies are used, based on the use of physical and chemical processes that reduce the viscosity of bitumen to produce warm asphalt mixtures. This paper discusses the features of the formation of properties of crushed stone-mastic asphalt mixes SMA-15 based on polymer bitumen modified, compacted at lower temperatures, relative to traditional asphalt concrete. The influence of chemical additives of domestic and foreign production of DAD-TA and Cecabase RT 945 on the properties of modified binder and asphalt concrete was studied. It was established that they have a positive plasticizing effect on the modified bitumen binder in crushed stone-mastic asphalt concrete without a decrease in heat resistance and adhesive strength, which made it possible to compact asphalt concrete samples at low temperatures (up to 130°C) without negatively affecting the strength and deforming properties of asphalt concrete.
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22

Zhdaniuk, Valeriy, Oleksandr Volovyk, Dmytro Kostin, and Sergey Lisovin. "An investigation of the effect of thermoplastic additives in asphalt concrete mixtures on the properties of different types of asphalt concrete." Eastern-European Journal of Enterprise Technologies 2, no. 6 (110) (April 12, 2021): 61–70. http://dx.doi.org/10.15587/1729-4061.2021.227806.

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The effect of modification of asphalt concrete mixtures of different grain sizes with “Ric-Polycell” (Ukraine) and “Duroflex®-SMA” thermoplastic polymers (Germany), which were added directly to the asphalt mixer during their preparation, on the properties of asphalt concrete was studied. It is confirmed that it is more expedient to use stone mastic asphalt concretes with a larger size of mineral crushed stone grains on high-traffic roads, as they are more rutting-resistant compared to asphalt concretes with smaller size and content of crushed stone grains. The effect of the temperature of preparation and thermostating of asphalt concrete mixtures modified with the investigated thermoplastics on the compressive strength of asphalt concrete at a temperature of 50 °С, which were made of the studied mixtures, was investigated. It was found that the maximum possible temperatures of preparation and thermostating of asphalt concrete mixes provide a more complete modification. The effect of the content of thermoplastic polymers in the composition of asphalt concrete mixtures on the properties and rutting resistance of fine-grained asphalt concrete, as well as stone mastic asphalt concrete, was studied. It was found that adding the “Ric-Polycell” polymer in the amount of 1.5 % and 3 % by weight of bitumen in the composition of the studied asphalt mixtures in the asphalt mixer during their preparation increases the rutting resistance of asphalt concrete under the studied conditions by 2.52–3.86 times. Modification of asphalt concrete mixtures with the “Duroflex®-SMA” additive in the amount of 0.3 % and 0.6 % by weight of the aggregate by a similar technology also allows increasing the rutting resistance of the obtained asphalt concrete by 1.86–3.16 times. Using these modifiers in the future will have a positive effect on the service life of the entire pavement structure
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23

Chen, Luchuan, Wenjun Gu, and Xuanyu Zhang. "Environment Effect on the Rutting Resistance of Nano-SiO2-Modified Asphalt Concrete: Temperature and Water." Advances in Civil Engineering 2021 (August 12, 2021): 1–9. http://dx.doi.org/10.1155/2021/7439006.

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Nanoparticles have been widely adopted to improve the high-temperature performance of asphalt binder. However, the influence of moisture on high-temperature performance is not clear. Hence, the water absorption performance of the nano-SiO2-modified asphalt concrete is investigated. Based on this, to further analyze the pavement performance of the nano-SiO2-modified asphalt concrete, the coupled effects of high-temperature, moisture content, and nanoparticles content on the rutting resistance of the nano-SiO2-modified asphalt concrete are tested and revealed in this study. Results show that temperature has the most significant influence on the water absorption performance of the nano-SiO2-modified asphalt concrete. The rutting resistance of the nano-SiO2-modified asphalt concrete decreases as temperature and moisture content increase, especially for the temperature. The dynamic stability at the same temperature condition decreases approximately linearly as moisture content increases. The effect of the nano-SiO2 content is the most nonobvious.
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Ogundipe, Olumide Moses. "The Use of Polyethylene Terephthalate Waste for Modifying Asphalt Concrete Using the Marshall Test." Slovak Journal of Civil Engineering 27, no. 2 (June 1, 2019): 9–15. http://dx.doi.org/10.2478/sjce-2019-0010.

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AbstractThis study considers the use of polyethylene terephthalate (PET) waste for modifying asphalt concrete. In the study, the optimum bitumen content of asphalt concrete was replaced with 4%, 6%, 8%, 10%, 12%, 14% and 16% of PET waste; the Marshall test was conducted on the samples. A comparison of the unmodified and PET-modified asphalt concrete showed that the stability of the modified asphalt concrete was reduced. The maximum stability for the PET waste-modified asphalt concrete was recorded at a content of 12% PET waste. This gives about a 20.4% reduction in stability. The study reveals that the addition of PET waste to the asphalt concrete causes a reduction in the flow value except with the addition of 14% and 16 % waste. This implies that the introduction of PET waste could improve the permanent deformation resistance of asphalt, although there is concern about a reduction in fatigue resistance.
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Vysotskaya, Marina, Anastasia Kurlykina, Artem Shiryaev, Anna Tkacheva, and Dmitry Litovchenko. "Modification of bituminous binders for guss asphalt." E3S Web of Conferences 274 (2021): 02011. http://dx.doi.org/10.1051/e3sconf/202127402011.

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Over the past few years, the research of the use of cast asphalt concrete mixtures in the upper layers of the coating of bridge structures has been actively carried out. The experience gained allows us to conclude that one of the most common effective ways to improve the durability and thermal stability of cast asphalt concrete pavements is the use of modified bituminous binders. The modified bitumen part of cast asphalt concrete acts as a medium capable of initiating the «self-healing» of the composite, independently eliminating structural defects. This study aims to research the rheological characteristics of modified bituminous binders. Bitumen grade BND 50/70 was used as a raw material in the study; the following types of additives were used as its modifiers: rubber modifier (RM), EVATHERM and SBS. The optimal concentrations of the proposed additives for modification allowing to achieve the effect of structuring the mastic component of cast asphalt concrete with insignificant increases in the temperatures of mixing and compaction of mixtures based on them have been revealed.
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Ismael, Saif Al-din Majid, and Mohammed Qadir Ismael. "Moisture Susceptibility of Asphalt Concrete Pavement Modified by Nanoclay Additive." Civil Engineering Journal 5, no. 12 (December 3, 2019): 2535–53. http://dx.doi.org/10.28991/cej-2019-03091431.

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Durability of hot mix asphalt (HMA) against moisture damage is mostly related to asphalt-aggregate adhesion. The objective of this work is to find the effect of nanoclay with montmorillonite (MMT) on Marshall properties and moisture susceptibility of asphalt mixture. Two types of asphalt cement, AC(40-50) and AC(60-70) were modified with 2%, 4% and 6% of Iraqi nanoclay with montmorillonite. The Marshall properties, Tensile strength ratio(TSR) and Index of retained strength(ISR) were determined in this work. The total number of specimens was 216 and the optimum asphalt content was 4.91% and 5% for asphalt cement (40-50) and (60-70) respectively. The results showed that the modification of asphalt cement with MMT led to increase Marshall stability and the addition of 6% of MMT recorded the highest increase, where it increased by 26.35% and 22.26% foe asphalt cement(40-5) and(60-70) respectively. Also, the addition of MMT led to increase moisture resistance of asphalt mixture according to the increase in TSR and IRS. The addition of 4% and 6% of MMT recorded the highest increase in TSR and IRS for asphalt cement (40-50) and (60-70) respectively, where they increased by 11.8% and 17.5% respectively for asphalt cement (40-50) and by 10% and 18% respectively for asphalt cement (60-70).
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Navolokina, S., V. Yadykina, and Anatoliy Gridchin. "CRAWLER-MASTIC ASPHALT CONCRETE WITH THE USE OF BITUMEN MODIFIED BY SEVILEEN." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 6, no. 8 (August 13, 2021): 8–16. http://dx.doi.org/10.34031/2071-7318-2021-6-8-8-16.

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Heavy traffic reduces the strength characteristics of asphalt concrete, causes peeling on the pavement. Crushed stone-mastic asphalt concrete is designed for the device of the upper layers of the coating on roads with high traffic intensity. The use of polymerasfalt concrete on a modified binder can lead to an improvement in the physical and mechanical characteristics of asphalt concrete and increase its re-sistance to climatic influences. The main aspects of improving the quality of crushed stone-mastic as-phalt concrete (SMA) due to the use of a binder modified with sevilen (SEVA) are discussed. The effect of bitumen containing sevilen with 22 and 29 % vinyl acetate groups on the properties of crushed stone-mastic asphalt concrete has been investigated. Analysis of the results showes that the use of modified binders has a positive effect on the entire complex of physical and mechanical parameters of polymer asphalt concrete. An increase in the strength of the samples at 20 and 50 °C, a decrease in this indicator at 0 °C is established. The indicators of water and heat resistance, shear resistance and crack resistance are also improved, which should have a positive effect on the durability of the road surface. Rational concentrations of polymer additives and the amount of vinyl acetate groups in its composition have been established. The adhesion of the binder to the mineral part of the asphalt con-crete mixture is estimated. The index of sensitivity to temperature differences of asphalt concrete sam-ples is considered due to the fact that asphalt concrete is a material that reacts to temperature fluctua-tions in the external environment. The analysis of the results of the tests carried out demonstrates that the use of modified binders has a positive effect on the entire complex of physical and mechanical pa-rameters of polymer asphalt concrete.
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Hao, Xiu Hong, Yan Min Wang, and Ai Qin Zhang. "A Study on Improving the Adhesiveness between Granite and Asphalt by Nano-Scaled Calcium Carbonate." Key Engineering Materials 575-576 (September 2013): 54–57. http://dx.doi.org/10.4028/www.scientific.net/kem.575-576.54.

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Granite, due to the poor adhesiveness with asphalt, cannot be widely used as aggregate in asphalt pavement. In this study, nanoscaled calcium carbonate (CaCO3), was selected as modifier to modify asphalt. The adhesion of aggregate and asphalt was evaluated by Boiling test method and the Marshall Test and Immersion Marshall Test were conducted on asphalt concrete (AC-16) according to the Standard Test Methods of Bitumen and Bituminous Mixture for Highway Engineering (JTG E20-2011). The results showed that When the Doping content of CaCO3 (%) is 7%, the adhesion levels reached up to 5 grade and achieved the project requirements. The Immersion Marshall Stability (MS1) of AC-16 CaCO3 modified asphalt concrete can improve 27.6% than that the Matrix asphalt concrete.
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Bhurke, Alekh S., E. Eugene Shin, and Lawrence T. Drzal. "Fracture Morphology and Fracture Toughness Measurement of Polymer-Modified Asphalt Concrete." Transportation Research Record: Journal of the Transportation Research Board 1590, no. 1 (January 1997): 23–33. http://dx.doi.org/10.3141/1590-04.

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Pavement distress occurs through a variety of mechanisms, but it is always controlled by the adhesive and cohesive performance of the asphalt binder. Although the causes of pavement failures are known, the precise mechanisms by which they occur remain to be understood. Observation of the fracture morphology of asphalt concrete can provide some information in this respect. The fracture morphology of asphalt concrete is dependent on the morphology of the binder. A network structure was observed in thin asphalt binder films and the fracture morphology and engineering properties of asphalt concrete were found to be dependent on the network morphology of the asphalt binder. Addition of polymers to asphalt binders causes changes in the nature of the network structure, and its effect can be qualitatively determined by characterizing the fracture morphology. Styrene butadiene styrene (SBS), styrene ethylene butylene styrene (SEBS), styrene butadiene rubber (SBR) latex and an epoxy-terminated reacting polyolefin (Elvaloy AM) were used in this study. A quantitative method to determine the effect of polymer modification on the fracture properties of asphalt concrete is the J-contour integral fracture toughness measurement. An experimental protocol to measure the critical J-integral fracture toughness ( J1 c) was developed and the low temperature (-10°C) J1 c values were determined for SEBS and Elvaloy AM-modified asphalt concrete at three different concentrations.
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30

Wang, Xiao Chu, Ying Li, Yi Peng Wang, and Lei Fu. "A Study on the Application of Rubber Crumb Modified Asphalt Mixture." Applied Mechanics and Materials 193-194 (August 2012): 500–504. http://dx.doi.org/10.4028/www.scientific.net/amm.193-194.500.

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The article is based on the rubber crumb modified asphalt’s fundamental characteristics, paving a practical road surface, doing rubber crumb modified asphalt concrete road surface in the Northern cold regions’ practical application and testing, summarizing relevant experience, providing reference for similar engineering application .
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31

Starchevskyy, V. L., Yu M. Hrynchuk, P. A. Matcipura, and V. V. Reutskyy. "Рhysical and mechanical properties of asphalt concrete obtained from bitumen modified by epoxide of vegetable origin." Chemistry, Technology and Application of Substances 4, no. 1 (June 1, 2021): 105–8. http://dx.doi.org/10.23939/ctas2021.01.105.

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The properties of fine-grained asphalt concrete and its modified by bio based epoxy rape oil (BERO) form were studied. Rapeseed oil epoxide (ROE) obtained from renewable and ecological raw materials, rapeseed oil in a composition with initiators (hardeners) was used as a modifier. It was found that the introduction of BERO in the amount of 3 % of the mass. allows to increase indicators of limit of durability of asphalt concrete at compression at a temperature of 20 °C and 50 °C. The efficiency of BERO composition and its positive effect on physical and mechanical prop- erties of asphalt concrete is established.
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32

Moretti, Laura, Nico Fabrizi, Nicola Fiore, and Antonio D’Andrea. "Mechanical Characteristics of Graphene Nanoplatelets-Modified Asphalt Mixes: A Comparison with Polymer- and Not-Modified Asphalt Mixes." Materials 14, no. 9 (May 7, 2021): 2434. http://dx.doi.org/10.3390/ma14092434.

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In recent years, nanotechnology has sparked an interest in nanomodification of bituminous materials to increase the viscosity of asphalt binders and improves the rutting and fatigue resistance of asphalt mixtures. This paper presents the experimental results of laboratory tests on bituminous mixtures laid on a 1052 m-long test section built in Rome, Italy. Four asphalt mixtures for wearing and binder layer were considered: two polymer modified asphalt concretes (the former modified with the additive Superplast and the latter modified with styrene–butadiene–styrene), a “hard” graphene nanoplatelets (GNPs) modified asphalt concrete and a not-modified mixture. The indirect tensile strength, water sensitivity, stiffness modulus, and fatigue resistance of the mixtures were tested and compared. A statistical analysis based on the results has shown that the mixtures with GNPs have higher mechanical performances than the others: GNP could significantly improve the tested mechanical performances; further studies will be carried out to investigate its effect on rutting and skid resistance.
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33

Chen, Zhi Guo, Zi Ning Chen, Jian Tao Wu, and Hai Chen Yao. "Pavement Performance Research on Fine Volcanic Ash Modified Asphalt Mastic and Mixture." Advanced Materials Research 255-260 (May 2011): 3382–86. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.3382.

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In this paper, based on advanced test methods such as laser particle sizer, scanning electron microscope, DSR and BBR,studies on physical properties of fine volcanic ash are carried out and the effect of single and composite modification on asphalt mastics and concrete by fine volcanic ash are also studied. Cost-effective of asphalt concrete modified by fine volcanic ash are analyzed as well. Results indicated fine volcanic ash can be qualified as a filler modifier for asphalt mixture and it significantly improves asphalt pavement performance and reduces project cost. Fine volcanic ash has favorable social and economic benefits and a broad application prospect.
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34

Raof, Hussein Burhan, and Mohammed Qadir Ismael. "Effect of PolyPhosphoric Acid on Rutting Resistance of Asphalt Concrete Mixture." Civil Engineering Journal 5, no. 9 (September 1, 2019): 1929–40. http://dx.doi.org/10.28991/cej-2019-03091383.

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The action of high repeated trucks load associated with dramatically elevated ambient temperatures leads to the most harmful distress in asphalt pavements occurred in Iraq known as rutting. Essentially, it is produced from the accumulation of irrecoverable strains, which mainly occurred in the asphalt layers. That visually demonstrated as a longitudinal depression in the wheel paths as well as small upheavals to the sides. Poly Phosphoric Acid (PPA) has been used as a means of producing modified asphalt binders and the interest to use it has increased in recent years. The PPA provides modified asphalt binder, which is relatively cheaply produced compared to polymer-modified asphalt. In this paper, PPA was used by three-percentages 1, 2 and 3 % of the weight of asphalt binder. Two asphalt binder grades were used in this study, 40-50 and 60 -70. The evaluation process based on conducting Marshall Test, Compressive strength test and the Wheel Tracking test. The optimum asphalt content was determined for eight asphalt mixture. The results of the index of retained strength of modified asphalt were slightly increased compared with conventional mixtures. The rut depth was determined by using wheel tracking device at different temperature (45 and 55 ºC) for each asphalt mixture under 10000 cycles and the results showed that modified asphalt with PPA produced mixtures with more rutting resistance than conventional asphalt mixture. Moreover, the effect of PPA on rutting resistance for asphalt grade 60-70 was higher than asphalt grade 40-50.
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35

Motamedi, Mana, Gholamali Shafabakhsh, and Mohammad Azadi. "Linking fatigue response of asphalt binders, mastics, and asphalt concrete mixture modified by nano-silica and synthesized polyurethane." International Journal of Damage Mechanics 30, no. 1 (August 25, 2020): 103–22. http://dx.doi.org/10.1177/1056789520950766.

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Asphalt concrete is composed of stone, sand, filler, and asphalt binder. Fatigue can be considered as a phenomenon affecting both the binder (asphalt binder or mastic) and the mixture. The purpose of this study was to investigate the fatigue damage response in asphalt binders, mastics, and asphalt concrete mixtures modified with nano-silica and synthesized polyurethane. The continuum damage mechanics method and phenomenological approaches in this study were used to investigate the fatigue performance. Obtained results indicated that the effect of the synthesized polyurethane on improving the fatigue life was far greater than that of nano-silica. The damage process in asphalt binders differed from that in the mastic and asphalt concrete mixture. Damage intensity parameter is an appropriate criterion for evaluating fatigue performance of asphalt binders and mastics. Concerning the fatigue of asphalt concrete mixture, the results of this study indicated a better convergence between the fatigue parameters of mastics and asphalt concrete mixture compared to asphalt binders, especially with increasing aging. Also, there was greater convergence between the fatigue life of the asphalt concrete mixture and asphalt binder and mastics in the method of continuum damage mechanics as compared to the phenomenological approach.
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36

Kandil, K., A. O. Abd El Halim, Y. Hassan, and A. Mostafa. "Investigation of the effects of different polymer-modified asphalt cements on asphalt mixes at low temperature." Canadian Journal of Civil Engineering 34, no. 5 (May 1, 2007): 589–97. http://dx.doi.org/10.1139/l06-152.

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The extreme environmental conditions in Canada require the use of asphalt cement that can provide a high resistance to low-temperature cracking during the winter season and a high resistance to rutting due to the elevated temperatures in the summer. Earlier studies showed that such desired improvements in the quality of asphalt cement could be achieved using polymer-modified asphalt (PMA) cement. This paper presents a three-phase experimental program that was carried out to evaluate the expected performance of asphalt concrete mixtures with PMA compared to asphalt concrete mixtures with conventional and air-oxidized asphalt binders. The results of this study show that PMA in asphalt concrete mixes would significantly improve the resistance to cracking (loading and low-temperature). Key words: asphalt mixtures, polymer-modified asphalt, conventional asphalt cement, air-oxidized asphalt, testing.
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37

Alexandrov, D. Yu. "PROSPECTS FOR APPLICATION OF COMPLEX-MODIFIED SAND ASPHALT CONCRETE IN ROAD CONSTRUCTION." Science & Technique 16, no. 4 (July 6, 2017): 315–23. http://dx.doi.org/10.21122/2227-1031-2017-16-4-315-323.

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The paper considers a possibility to use sand asphalt concrete as a material for protection of asphalt concrete and cement concrete road pavements against affection of external destructive factors. Advantages and disadvantages of sand asphalt concrete road pavements have been determined in the paper. The paper provides recommendations on improvement of sand asphalt concrete properties and contains an analysis of possible variants for usage of complex-modified sand asphalt concrete in the road construction. It has been noted that according to its potentially possible physical and mechanical properties activated quartz sand being micro-reinforced by dispersive industrial wastes is considered as an efficient component for creation of constructive layers in road asphalt concrete pavements. The paper reveals only specific aspects of the efficient application of quartz sand in road asphalt concrete. The subject of the paper loоks rather interesting for regions where there are no rock deposits for obtaining broken-stone ballast but there is rather significant spreading of local quarts sand. Its successful application is connected with the necessity to develop special equipment for physical and chemical activation of sand grain surface that permits strongly to increase an adhesive strength in the area of phase separation within the “bitumen–SiO2” system. The considered problem is a topical one and its solution will make it possible to local sand in a maximum way and partially to exclude application of broken stone in road construction.
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38

Widianty, Desi, Ratna Yuniarti, Akmaluddin Akmaluddin, Agung Prabowo, and Shofia Rawiana. "Analisis Karakteristik Marshall pada Beton Aspal Lapis Pengikat (Asphalt Concrete-Binder Course) menggunakan Aspal Modifikasi Serbuk Serat Pelepah Batang Pisang." JURNAL SAINS TEKNOLOGI & LINGKUNGAN 6, no. 1 (June 25, 2020): 85. http://dx.doi.org/10.29303/jstl.v6i1.119.

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Asphalt modification by adding fiber powder of banana stem can be implemented to improve the performance of pure asphalt. Asphalt concrete binder course AC-BC is a flexible pavement layer that functions to distribute the load towards the foundation layer. So it really needs strength, durability and stability of the materials. For that, it is necessary to use asphalt modification with fiber powder of banana stem which is used as a binding material in AC-BC asphalt concrete mixture. The proper percentage of modified asphalt level will determine the optimum quality of an asphalt mixture. Asphalt concrete specimens were made in 3 (three) samples for each variation of asphalt level by 5%; 5.5%; 6%; 6.5%; and 7%. The asphalt optimum level in the mixture is carried out through volumetric investigation in the form of VMA, VIM, and VFB values and mechanical assessment in the form of stability, flow and Marshall Quetient. The results of data analysis found that the value of VIM, stability and MQ tend to decrease with increasing levels of modified asphalt. On the other hand the value of VMA, VFB and flow tend to rise with increasing levels of modified asphalt. However, from the five variations of asphalt levels obtained asphalt levels of 5% and 5.5% which meet all the specifications of AC-BC asphalt concrete specification. To determine the asphalt optimum level, the average of qualified asphalt level is taken. So that the asphalt concrete AC-BC will produce a better structural performance at 5.25% asphalt level with banana stem fiber powder on asphalt by 0.1%.
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39

Lin, Yan Peng, and Bin Li. "Research on Pavement Performance with Warm Mix Asphalt Concrete." Advanced Materials Research 418-420 (December 2011): 147–52. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.147.

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Using SBR and epoxy to modified warm-mix asphalt, the penetrability, ductility, softening point of bitumen at different aging times are tested, the comparative analysis of the modified effects of two modified agents to the asphalt mixture is made; Construction temperature of asphalt is determined by using temperature - porosity curve; The results reflect epoxy resin and SBR can improve the high temperature stability and anti moisture infringement capacity, so propose to use warm mix asphalt concrete for the top layer except in special sections layer.
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40

Suaryana, Nyoman, and Tedi Santo Sofyan. "Performance Evaluation of Hot Mixture Asphalt Using Concentrated Rubber Latex, Rubber Compound and Synthetic Polymer as Modifier." Civil Engineering Dimension 21, no. 1 (March 28, 2019): 36–42. http://dx.doi.org/10.9744/ced.21.1.36-42.

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Research on the utilization of natural rubber for Hot Mixture Asphalt as modifier has been widely carried out, and more intensively since 2016 due to the declining global natural rubber price. Further research conducted is the utilization of pre-vulcanized concentrated rubber latex and rubber compound added with antioxidants and treated through vulcanization process. This study experimentally evaluates the performance of Asphalt Concrete Wearing Course (ACWC) using natural rubber and synthetic polymer as modifier, compared to ACWC without modifier (only petroleum asphalt). The results show that the rubberized asphalt has higher index penetration value as well as higher elasticity compared to petroleum asphalt penetration grade 60, but lower than synthetic polymer modified asphalt. Similarly, the level of performance of rubberized asphalt mixtures, particularly resilient modulus, water resistance, deformation, and fatigue cracking, is between that of petroleum asphalt and synthetic polymer modified asphalt
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41

Imaninasab, Reza, and Behzad Bakhshi. "Rutting analysis of modified asphalt concrete pavements." Proceedings of the Institution of Civil Engineers - Construction Materials 170, no. 4 (August 2017): 166–77. http://dx.doi.org/10.1680/coma.15.00015.

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42

Issa Sarsam, Saad. "Resilient Behavior of Modified Asphalt Concrete Mixture." American Journal of Traffic and Transportation Engineering 3, no. 2 (2018): 18. http://dx.doi.org/10.11648/j.ajtte.20180302.11.

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43

Sarsam, Saad Issa, and Ammar Khalaf AL-Lamy. "Fatigue Life Assessment of Modified Asphalt Concrete." International Journal of Scientific Research in Knowledge 3, no. 2 (February 1, 2015): 30–41. http://dx.doi.org/10.12983/ijsrk-2015-p0030-0041.

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44

Qi, Xicheng, Peter E. Sebaaly, and Jon A. Epps. "Evaluation of Polymer-Modified Asphalt Concrete Mixtures." Journal of Materials in Civil Engineering 7, no. 2 (May 1995): 117–24. http://dx.doi.org/10.1061/(asce)0899-1561(1995)7:2(117).

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45

Liantong, Mo, Wu Shaopeng, Liu Xiaoming, and Chen Zheng. "Percolation model of graphite-modified asphalt concrete." Journal of Wuhan University of Technology-Mater. Sci. Ed. 20, no. 1 (March 2005): 111–13. http://dx.doi.org/10.1007/bf02870889.

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46

Karahancer, Sebnem Sargin, Melek Kiristi, Serdal Terzi, Mehmet Saltan, Aysegul Uygun Oksuz, and Lutfi Oksuz. "Performance evaluation of nano-modified asphalt concrete." Construction and Building Materials 71 (November 2014): 283–88. http://dx.doi.org/10.1016/j.conbuildmat.2014.08.072.

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47

Chernov, Sergey A., K. D. Golyubin, and Lyudmila V. Eremeeva. "Modifying Additives Effect on Use Properties of Asphalt Concrete." Materials Science Forum 931 (September 2018): 653–60. http://dx.doi.org/10.4028/www.scientific.net/msf.931.653.

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The article dwells on the results of the survey of the asphalt concrete modified with various additives. It contains the results of the impact made by the modifying additives on the physical mechanic and performance properties (rutting resistance, fatigue life and permanent deformation accumulation resistance) of the Type A Grade I asphalt concretes. In the article the regularities of the influence exerted by the formula-related and technological factors on the asphalt concrete properties were established. Consistent with the obtained results forecasting of rutting in accordance with AVTODOR STO 2.28-2016 and forecasting of fatigue damage accumulation on the basis of the Miner’s cumulative model of damage linear addition were executed. On the basis of the forecast results the interrepair life of the road structures with the pavement courses of asphalt concretes containing the surveyed modifiers was evaluated.
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48

Li, Hechuan, Jianying Yu, Shaopeng Wu, Quantao Liu, Yuanyuan Li, Yaqi Wu, and Haiqin Xu. "Investigation of the Effect of Induction Heating on Asphalt Binder Aging in Steel Fibers Modified Asphalt Concrete." Materials 12, no. 7 (April 1, 2019): 1067. http://dx.doi.org/10.3390/ma12071067.

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Induction heating is a valuable technology to repair asphalt concrete damage inside. However, in the process of induction heating, induced particles will release a large amount of heat to act on asphalt binder in a short time. The purpose of this paper was to study the effect of induction heating on asphalt binder aging in steel fibers modified asphalt concrete. The experiments were divided into two parts: induction heating of Dramix steel fibers coated with asphalt binder (DA) and steel wool fibers modified asphalt concrete. After induction heating, the asphalt binders in the samples were extracted for testing aging indices with Fourier Transform Infrared (FTIR), Dynamic Shear Rheometer (DSR), and Four-Components Analysis (FCA) tests. The aging of asphalt binder was analyzed identifying the change of chemical structure, the diversification of rheological properties, and the difference of component. The experiments showed that the binder inside asphalt concrete began aging during induction heating due to thermal oxygen reaction and volatilization of light components. However, there was no peak value of the carbonyl index after induction heating of ten cycles, and the carbonyl index of DA was equivalent to that of binder in asphalt concrete after three induction heating cycles, which indicated the relatively closed environment inside asphalt concrete can inhibit the occurrence of the aging reaction.
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49

Hossain, Mustaque, Affan Habib, and Todd M. Latorella. "Structural Layer Coefficients of Crumb Rubber–Modified Asphalt Concrete Mixtures." Transportation Research Record: Journal of the Transportation Research Board 1583, no. 1 (January 1997): 62–70. http://dx.doi.org/10.3141/1583-08.

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Structural layer coefficients for crumb rubber–modified (CRM) asphalt concrete mixtures were developed from the backcalculated moduli values using the falling weight deflectometer (FWD) test results on in situ pavements. Several test sections of recently built crumb rubber–modified pavements on three routes in Kansas (I-135, K-32 and US-56) were selected for this study. I-135 is a newly built asphalt pavement and the other two are gap-graded CRM overlays. Deflection data were collected with a Dynatest 8000 FWD at 21 locations at 7.5-m intervals on each test section on I-135, 22 locations on K-32, and 11 locations on US-56. For CRM asphalt mix overlays, the average surface layer coefficients from the equal mechanistic approach of analysis were found to vary between 0.11 and 0.46 with most values falling around 0.30. This indicates a lower structural layer coefficient value for the asphalt-rubber mix compared with the conventional asphalt concrete. For newly constructed CRM asphalt pavements, the structural layer coefficients varied from 0.25 to 0.48, with the average value around 0.35. These values are close to the design layer coefficient values used for conventional asphalt concrete layers. Large variabilities in computed structural layer coefficients for the rubblized jointed reinforced concrete pavement were observed. The structural layer coefficients computed for this layer varied from 0.10 to 0.35.
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50

Zou, Xiao Long, Ai Min Sha, Wei Jiang, and Xin Yan Huang. "Characteristic Analysis of Dynamic Modulus for High Modulus Asphalt Concrete." Applied Mechanics and Materials 505-506 (January 2014): 15–18. http://dx.doi.org/10.4028/www.scientific.net/amm.505-506.15.

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In order to analyze the characteristics of high modulus asphalt mixture dynamic modulus, Universal Testing Machine (UTM-25) was used for dynamic modulus test of three kinds of mixtures, which were PR Module modified asphalt mixture and PR PLAST.S modified asphalt mixture and virgin asphalt mixture, to investigate dynamic modulus and phase angle at different temperatures and frequencies. The results indicate that: the dynamic modulus order of the three asphalt mixtures is PR MODULE > PR PLAST.S > Virgin. PR MODULE asphalt mixture dynamic modulus is much larger than the other two.
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