Um die anderen Arten von Veröffentlichungen zu diesem Thema anzuzeigen, folgen Sie diesem Link: Asphalt concrete Asphalt industry.
Zeitschriftenartikel zum Thema „Asphalt concrete Asphalt industry“
Geben Sie eine Quelle nach APA, MLA, Chicago, Harvard und anderen Zitierweisen an
Machen Sie sich mit Top-50 Zeitschriftenartikel für die Forschung zum Thema "Asphalt concrete Asphalt industry" bekannt.
Neben jedem Werk im Literaturverzeichnis ist die Option "Zur Bibliographie hinzufügen" verfügbar. Nutzen Sie sie, wird Ihre bibliographische Angabe des gewählten Werkes nach der nötigen Zitierweise (APA, MLA, Harvard, Chicago, Vancouver usw.) automatisch gestaltet.
Sie können auch den vollen Text der wissenschaftlichen Publikation im PDF-Format herunterladen und eine Online-Annotation der Arbeit lesen, wenn die relevanten Parameter in den Metadaten verfügbar sind.
Sehen Sie die Zeitschriftenartikel für verschiedene Spezialgebieten durch und erstellen Sie Ihre Bibliographie auf korrekte Weise.
1
Zhou, Changhong, Xueyan Liu, Panos Apostolidis, A. Scarpas und Liang He. „Induction Heating-Assisted Compaction in Porous Asphalt Pavements: A Computational Study“. Applied Sciences 8, Nr. 11 (20.11.2018): 2308. http://dx.doi.org/10.3390/app8112308.
Der volle Inhalt der QuelleAnnotation:
Low temperature asphalt (LTA) technologies, such as warm-mixed asphalt mixes, are utilized in the paving industry to lower energy demands and greenhouse gas emissions during asphalt mixing and pavement construction. However, the asphalt mixes developed that incorporate LTA additives are more sensitive than hot-mixed asphalts to temperature reduction during compaction, which leads to inadequate compaction and subsequent poor pavement performance. The induction heating-assisted compaction of pavement structures appears to be an effective way to ameliorate such issues and to improve mix compactability at lower temperatures. Considering that induction-assisted compaction is a complex process, a computational methodology is proposed in this paper. A porous asphalt concrete mix was considered as case material. For the pavement compaction analyses after induction, the temperature field generated by electromagnetic induction was predicted and the material parameters of asphalt mortar were adjusted. The effect of induction heating on asphalt compaction effectiveness, the tendency of mix density changing, the increase in compactor passes, and the influence of temperature on compaction at different locations in the pavement were studied as well.
2
Ergun, Murat. „Estimation of friction coefficient of asphalt concrete road surfaces using the fuzzy logic approach“. Canadian Journal of Civil Engineering 34, Nr. 9 (01.09.2007): 1110–18. http://dx.doi.org/10.1139/l07-045.
Der volle Inhalt der QuelleAnnotation:
Vehicle speeds have increased very dramatically with new developments in todays automotive industry, and thus the friction behavior of roads has become very important from the safety point of view. The main aim of this paper is to estimate the friction behavior of asphalt concrete road surfaces at any speed using the fuzzy logic approach. Friction is defined in the paper, and the effects of road surface characteristics, mainly macrotexture and microtexture properties, on the friction behavior of asphalt concrete road surfaces are explained. The data measured from the different asphalt concrete road pavements (on Belgium road networks) representing different road surface characteristics are analyzed for estimating the friction behavior of roads. Both the multiple linear regression analysis and the fuzzy logic approach are used to estimate the friction coefficient of asphalt concrete road surfaces. The two approaches are compared, and it is shown that the fuzzy logic approach precisely estimates the friction coefficient of asphalt concrete road surfaces at any speed better than multiple linear regression analysis. It is possible that there is a strong relation between the asphalt concrete road surface characteristics, mainly macrotexture and microtexture, and friction.Key words: asphalt concrete road surfaces, friction, fuzzy estimation.
3
Musa, Sarah Safaaldeen, Noorance Al-Mukaram und Mohammed Bally Mahdi. „Assessment of Asphalt Mixture Behaviour Containing Recycled Concrete Aggregates“. Key Engineering Materials 895 (03.08.2021): 139–46. http://dx.doi.org/10.4028/www.scientific.net/kem.895.139.
Der volle Inhalt der QuelleAnnotation:
Recently, the construction industry uses the Recycled Concrete Aggregates (RCA)resulting from construction and demolition waste (CDW) to achieve sustainable requirements andeconomic benefits. In this paper, asphalt paving mixes were prepared with RCA instead of naturalaggregates for the base course in flexible road pavements and walking areas used by pedestrians andcyclists. Different asphalt mixes samples were prepared with different asphalt contents to meet therequired specifications. Additionally, several laboratory tests were carried out to assess mixturebehavior including the Marshall test. The results indicated that the mixture made with aggregates ofCDW have met all the requirements of Iraqi specifications of roads and bridges (SORB/R9). Thisinvestigation could be a useful guide for road engineers in designing asphalt mixtures from RCA.
4
Chan, Yin Wen, Min Huang Hsu, Chun Hung Chang und Je Wei Tu. „Study on the Application of a Verification System Implementation Mode in Asphalt Concrete Batching Plants“. Advanced Materials Research 723 (August 2013): 993–1000. http://dx.doi.org/10.4028/www.scientific.net/amr.723.993.
Der volle Inhalt der QuelleAnnotation:
Asphalt concrete is the main body of the surface layer of the road construction, which directly affects the service level of the road surface. During the construction process, how quality control (QC) operation is performed for products of the asphalt concrete batching plant (ACBP) is one of the key factors that will directly affect whether the road construction is successful. How to stimulate the asphalt concrete industry to strengthen its efforts on QC, investment in R&D, upgrading its manpower, machinery, raw material quality and assist the construction authority in playing a watchdog on the quality of the ACBP have become an imminent and critical issue. The theme of this study is to bring QC of the ACBP in the verification system and describe how to establish the quality appraisal standard and the verification system for the ACBP and the real benefits from implementation of the product verification, properly monitoring the quality of asphalt concrete from the origin.
5
Ziari, Hassan, Mahmud Ameri und Mohammad Mahdi Khabiri. „RESILIENT BEHAVIOUR OF HOT MIXED AND CRACK SEALED ASPHALT CONCRETE UNDER REPEATED LOADING“. Technological and Economic Development of Economy 13, Nr. 1 (31.03.2007): 56–60. http://dx.doi.org/10.3846/13928619.2007.9637776.
Der volle Inhalt der QuelleAnnotation:
Bituminous mixes are becoming increasingly important in the road industry. The road engineers identify rutting as a major source of distress in Hot Mix Asphalt (HMA) pavements. The Asphalt Mix Design Marshal method adequately addresses the aggregate and asphalt binder properties that contribute to permanent deformation. However, there is no laboratory test currently at hand to quickly predict permanent deformation susceptibility of HMA. The main purpose of this paper is to provide practical information of laboratory samples for practitioners and mix designers. Thus, relevant test procedures and results of tests conducted are reported in this paper. Two resilient behaviours of cracked sealed asphalt concrete were studied by varying temperature and time of loading to understand the crack sealed pavement behaviour under Iran conditions.
6
Le, Anh Thang, Manh Tuan Nguyen und Van Phuc Le. „The Effect of Spent Fluid Catalytic Cracking Filler on Performance Testing of Asphalt Concrete Mixture“. Advances in Materials Science and Engineering 2021 (31.07.2021): 1–17. http://dx.doi.org/10.1155/2021/8577021.
Der volle Inhalt der QuelleAnnotation:
The spent fluid catalytic cracking (SFCC), waste from the petroleum industry, is nonstop increasing and causing environmental pollution in Vietnam. This study is an attempt to recycle SFCC in pavement construction. The study investigated the effect of SFCC, as a filler material in the hot-mix asphalt (HMA), on the essential characteristics of the asphalt concrete mix. First, the optimum percentages of bitumen and SFCC rate were investigated based on the Marshall design method. The HMA with SFCC showed more enhanced stability, flow, and other Marshall properties than the asphalt concrete mixture with the optimum limestone filler of 5%. Besides, the effects of SFCC rates on Marshall characteristics were explored. Second, performance tests were conducted to compare the mix with the different optimum content fillers of SFCC, limestone, and Portland cement. The tests include wheel tracking, indirect tensile, fatigue, and dynamic modulus tests to evaluate the performance of HMA with SFCC. It was found that the asphalt mixture with the optimum SFCC filler content can enhance pavement performance and improve the rutting and cracking resistance of the asphalt pavement.
7
Horvath, Arpad, und Chris Hendrickson. „Comparison of Environmental Implications of Asphalt and Steel-Reinforced Concrete Pavements“. Transportation Research Record: Journal of the Transportation Research Board 1626, Nr. 1 (Januar 1998): 105–13. http://dx.doi.org/10.3141/1626-13.
Der volle Inhalt der QuelleAnnotation:
The public, industry, and governments have become increasingly interested in green design and sustainable development. Construction activities affect the environment significantly, so environmental issues should be considered seriously. Thousands of miles of roads are paved every year with asphalt and steel-reinforced concrete. What are the environmental effects of the two materials? If asphalt has been used overwhelmingly over concrete, is it a better choice for sustainable development? We present results of a life cycle inventory analysis of the two materials based on publicly available data. We find that for the initial construction of equivalent pavement designs, asphalt appears to have higher energy input, lower ore and fertilizer input requirements, and lower toxic emissions, but it has higher associated hazardous waste generation and management than steel-reinforced concrete. When accounting for the uncertainty in the data and when annualizing environmental effects based on assumed average service lives of the two pavement types, the resource input requirements and the environmental outputs are roughly comparable for the two materials. However, asphalt pavements have been recycled in larger quantities than concrete pavements, with consequent resource savings and avoided pollution, which suggests that asphalt may be a better choice from a sustainable development viewpoint. Of course, special functional requirements or economics may dictate the use of one material over the other in particular applications regardless of the overall environmental effects.
8
Bdour, Ahmed N., Yahia Khalayleh und Aslam A. Al-Omari. „Assessing Mechanical Properties of Hot Mix Asphalt with Wire Wool Fibers“. Advances in Civil Engineering 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/795903.
Der volle Inhalt der QuelleAnnotation:
This paper investigates the potential application of wire wool in the modification of hot asphalt mixes (HMA). Wire wool material is widely available at local markets as a by-product of wire wool industry and as waste products from homes. For the purpose of this study, wire wool was cut into small pieces so that it can be placed in the asphalt mixes. Different percentages of wire wool were incorporated with the hot asphalt mixes (0.0%, 0.25%, and 0.5%) of the total weight of the asphalt binder. Various experimental tests were used to evaluate the modification effectiveness of combining wire wool with hot asphalt mixes, namely, the Marshall Stability, indirect tensile strength (ITS), dynamic creep, fatigue, and rutting tests. Test results proved that the addition of wire wool increased the tensile strength of the asphalt concrete mixes. However, rutting increased due to increasing percentage of wire wool. Therefore, mixes containing wire wool can be used in areas where rutting is not the expected predominant distress type.
9
Kim, Sun Gun, Sung Jin Lee, Soon Jae Lee und Kwang W. Kim. „Evaluation of Rut Resistance of Polymer-Modified Asphalt Concretes“. Advanced Materials Research 687 (April 2013): 282–88. http://dx.doi.org/10.4028/www.scientific.net/amr.687.282.
Der volle Inhalt der QuelleAnnotation:
The rutting is a significant damage mechanism showing longitudinal furrows along with both wheel paths on asphalt pavement surface. To prevent the rutting under heavy traffic condition, polymer-modified asphalt (PMA) concretes were introduced in asphalt pavement industry. To measure rut resistance of asphalt concretes, the asphalt pavement analyzer (APA) and the deformation strength, SD, were used in this study. The SD was measured by Kim Test, a simple static-loading test, on the 150 mm-diameter cylindrical specimens at 60oC and APA test was performed for the same material. The PMA concretes were found to show improvement in SD and APA rut resistance by more than 50% and 60%, respectively. The SD and APA rut depth showed a relatively high correlation (R2 = 0.81) each other at 60°C. Therefore, it was possible to estimate rut tendency of normal asphalt and polymer-modified asphalt concretes by SD.
10
Perca Callomamani, Luis Alberto, Leila Hashemian und Katrina Sha. „Laboratory Investigation of the Performance Evaluation of Fiber-Modified Asphalt Mixes in Cold Regions“. Transportation Research Record: Journal of the Transportation Research Board 2674, Nr. 7 (09.06.2020): 323–35. http://dx.doi.org/10.1177/0361198120922213.
Der volle Inhalt der QuelleAnnotation:
Thermal cracking of pavement is caused by contraction of the asphalt layer at low temperatures, when tensile stresses build up to a critical point at which a crack is formed. The cracks formed then propagate under traffic loading conditions. Freeze-thaw cycles accelerate crack propagation and deterioration of the asphalt layer, and can also lead to the formation of more severe distresses such as potholes. Fibers have attracted increasing attention in the asphalt industry for use as asphalt concrete modifiers. The addition of fibers to hot mix asphalt (HMA) results in a composite material that has a higher tensile strength, along with the ability to absorb greater energy during the fracture process. The fibers within the material also act as a barrier preventing the formation and propagation of cracks in the asphalt mix. This research evaluates the effectiveness of adding polymer fibers to HMA to increase both its resistance to cracking at intermediate and low temperatures, and its rutting resistance and moisture susceptibility at high temperatures. For this purpose, three different types of polymer fibers: aramids, polyethylene terephthalate (PET), and polyacrylonitrile (PAN), were added to conventional HMA mixes. The resulting samples were compacted, and their mechanical properties were compared with conventional HMA in the laboratory. At the end of the paper, a material cost comparison is provided as a reliable source of information when selecting materials to fulfill minimum industry specifications.
11
Sackey, Solomon, Dong-Eun Lee und Byung-Soo Kim. „Life Cycle Assessment for the Production Phase of Nano-Silica-Modified Asphalt Mixtures“. Applied Sciences 9, Nr. 7 (29.03.2019): 1315. http://dx.doi.org/10.3390/app9071315.
Der volle Inhalt der QuelleAnnotation:
To combat the rutting effect and other distresses in asphalt concrete pavement, certain modifiers and additives have been developed to modify the asphalt mixture to improve its performance. Although few additives exist, nanomaterials have recently attracted significant attention from the pavement industry. Several experimental studies have shown that the use of nanomaterials to modify asphalt binder results in an improved oxidative aging property, increased resistance to the rutting effect, and improves the rheological properties of the asphalt mixture. However, despite the numerous benefits of using nanomaterials in asphalt binders and materials, there are various uncertainties regarding the environmental impacts of nano-modified asphalt mixtures (NMAM). Therefore, this study assessed a Nano-Silica-Modified Asphalt Mixtures in terms of materials production emissions through the Life Cycle Assessment methodology (LCA), and the results were compared to a conventional asphalt mixture to understand the impact contribution of nano-silica in asphalt mixtures. To be able to compare the relative significance of each impact category, the normalized score for each impact category was calculated using the impact scores and the normalization factors. The results showed that NMAM had a global warming potential of 7.44563 × 103 kg CO2-Eq per functional unit (FU) compared to 7.41900 × 103 kg CO2-Eq per functional unit of the conventional asphalt mixture. The application of LCA to NMAM has the potential to guide decision-makers on the selection of pavement modification additives to realize the benefits of using nanomaterials in pavements while avoiding potential environmental risks.
12
Wei, Minghua, Shaopeng Wu, Haiqin Xu, Hechuan Li und Chao Yang. „Characterization of Steel Slag Filler and Its Effect on Aging Resistance of Asphalt Mastic with Various Aging Methods“. Materials 14, Nr. 4 (11.02.2021): 869. http://dx.doi.org/10.3390/ma14040869.
Der volle Inhalt der QuelleAnnotation:
Steel slag is the by-product of the steelmaking industry, the negative influences of which prompt more investigation into the recycling methods of steel slag. The purpose of this study is to characterize steel slag filler and study its feasibility of replacing limestone filler in asphalt concrete by evaluating the resistance of asphalt mastic under various aging methods. Firstly, steel slag filler, limestone filler, virgin asphalt, steel slag filler asphalt mastic and limestone filler asphalt mastic were prepared. Subsequently, particle size distribution, surface characterization and pore characterization of the fillers were evaluated. Finally, rheological property, self-healing property and chemical functional groups of the asphalt mastics with various aging methods were tested via dynamic shear rheometer and Fourier transform infrared spectrometer. The results show that there are similar particle size distributions, however, different surface characterization and pore characterization in the fillers. The analysis to asphalt mastics demonstrates how the addition of steel slag filler contributes to the resistance of asphalt mastic under the environment of acid and alkaline but is harmful under UV radiation especially. In addition, the pore structure in steel slag filler should be a potential explanation for the changing resistance of the asphalt mastics. In conclusion, steel slag filler is suggested to replace limestone filler under the environment of acid and alkaline, and environmental factor should be taken into consideration when steel slag filler is applied to replace natural fillers in asphalt mastic.
13
Wang, Wenfeng, Shaochan Duan und Haoran Zhu. „Research on Improving the Durability of Bridge Pavement Using a High-Modulus Asphalt Mixture“. Materials 14, Nr. 6 (16.03.2021): 1449. http://dx.doi.org/10.3390/ma14061449.
Der volle Inhalt der QuelleAnnotation:
In order to improve the durability of the asphalt pavement on a cement concrete bridge, this study investigated the effect of the modulus of the asphalt mixture at the bottom layer on the mechanical response of bridge pavement, along with a type of emerging bridge pavement structure. In addition, the design method and pavement performance of a high-modulus asphalt mixture were investigated using laboratory and field tests, and the life expectancy of the deck pavement structure was predicted based on the rutting deformation. The results showed that the application of a high-modulus asphalt mixture as the bottom asphalt layer decreased the stress level of the pavement structure. The new high-modulus asphalt mixture displayed excellent comprehensive performance, i.e., the dynamic stability reached 9632 times/mm and the fatigue life reached 1.65 million cycles. Based on the rutting depth prediction, using high-modulus mixtures for the bridge pavement prolonged the service life from the original 5 years to 10 years, which significantly enhanced the durability of the pavement structure. These research results could be of potential interest for practical applications in the construction industry.
14
Kusdiyono, Kusdiyono, Supriyadi Supriyadi, Tedjo Mulyono und Sukoyo Sukoyo. „Pengaruh Penambahan Limbah Plastik Jenis Thermosetting Terhadap Parameter Marshall Laston AC-WC“. Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil 24, Nr. 2 (31.12.2019): 166. http://dx.doi.org/10.32497/wahanats.v24i2.1733.
Der volle Inhalt der QuelleAnnotation:
At present, plastic is a material that is needed by the community at large, where the impact is also very extraordinary after the plastic is used in everyday life which can cause serious problems if the management is not done properly. The problem of plastic waste does not only occur in the city of Semarang, but also in other cities, so that the Ministry of Environment and Forestry has implemented a paid plastic bag program in the short term. But this is only to deal with problems in the short term. In the long run, it will not solve the problem of "plastic waste", because the policy actually encourages people to buy plastic which, of course, will add a new burden for the community to buy it. Based on the above problems, it is necessary to utilize this plastic waste to be made into road pavement materials such as in the manufacture of Asphal Concrette Wearing Course, by making 5 mixed variations ranging from (2 to 10)% of the weight of the aggregate . This research was initiated through a survey process, material procurement, testing of stacking materials, making test specimens, testing specimens. The results of the research can show that the type of Thermosetting plastic waste has a significant influence on the Asphalt Concrete mixture AC-WC heat mixture, including: Density, Marshall Stability, Flow, VIM, VMA, MQ and the remaining Marshall Stability tend to show an increase, moderate VFA and VIMrefusal Density values tend to show a decrease. Thus the plastic waste from the Thermosetting type can be used as a partial replacement of the aggregate for the Asphalt Concrete mixture AC-WC heat mixture with a plastic waste content is limited to a maximum of 10% and at an optimum asphalt content of 5.55%. Thus this research is expected to be of benefit to the industry and the people of Semarang in relation to the use of plastic waste for road pavement.
15
Xiao, Yue, Sandra Erkens, Mingliang Li, Tao Ma und Xueyan Liu. „Sustainable Designed Pavement Materials“. Materials 13, Nr. 7 (29.03.2020): 1575. http://dx.doi.org/10.3390/ma13071575.
Der volle Inhalt der QuelleAnnotation:
This Special Issue “Sustainable Designed Pavement Materials” has been proposed and organized as a means to present recent developments in the field of environmentally-friendly designed pavement materials. For this reason, articles included in this special issue relate to different aspects of pavement materials, from industry solid waste recycling to pavement materials recycling, from pavement materials modification to asphalt performance characterization, from pavement defect detection to pavement maintenance, and from asphalt pavement to cement concrete pavement, as highlighted in this editorial.
16
Krayushkina, Kateryna, Olegas Prentkovskis, Andrii Bieliatynskyi und Raimundas Junevičius. „USE OF STEEL SLAGS IN AUTOMOBILE ROAD CONSTRUCTION“. TRANSPORT 27, Nr. 2 (26.06.2012): 129–37. http://dx.doi.org/10.3846/16484142.2012.690093.
Der volle Inhalt der QuelleAnnotation:
Building and, especially, reconstruction and repairs of highways, call for the development of stone materials manufacturing industry. Increasing need for stone materials may be satisfied by a wide use of industrial waste and secondary resources. In road building, slag of ferrous and nonferrous metallurgy is one of the most popular wastes which are increasingly widespread with every year. Such slag is a valuable raw material for preparation of macadam materials and mineral binders serving as a base for asphalt concrete mixtures and manufacturing of cement emulsions, which are widely used in road paving. The research focused on the use of different types of slag in road construction in Ukraine. Possibilities of using crushed rock and sand as recrement slag of different production for preparation of asphalt concrete and cement mixtures to be used for road-base was studied, as well as the use of slag materials for construction of lower category roads. In the given work, the opportunity to recycle electric furnace steel-smelting slag for preparation of asphalt concrete mixtures was defined.
17
Gabdullin, Talgat, und Marat Makhmutov. „Providing interlayer adhesion of dissimilar layers of top road surfaces“. E3S Web of Conferences 274 (2021): 02003. http://dx.doi.org/10.1051/e3sconf/202127402003.
Der volle Inhalt der QuelleAnnotation:
The article reviews the option of how to make the top pavement of asphalt-concrete mixture adhere reliably to the base, which is the underlying cement-concrete coating. The bitumen-latex emulsion is suggested as a binder for the two pavement layers. The research aimed to determine the optimal layer thickness of the bituminous-latex emulsion to be applied and achieve the maximum interlayer adhesion between the top asphalt-concrete pavement and the cement-concrete base. After full-scale experiments, the required layer thickness of the bitumen-latex emulsion was 2 mm. With this layer thickness of the binder, road pavement layers do not delaminate and shear when stressed by the intensive flows of vehicles moving on the roads. The results obtained are important for the road construction industry for suggesting the formulation of bitumen-latex emulsion and finding the most effective layer thickness to be applied. The suggested formulation of a bitumen-latex emulsion is frost-resistant. The article describes the experimental steps for determining the optimal application thickness at a fair length. The maintenance-free life of roads with an asphalt-concrete mixture on a cement-concrete base interlayered with a bitumen-latex emulsion as a binder is assumed to get much longer.
18
Rahman, Md Tareq, Abbas Mohajerani und Filippo Giustozzi. „Recycling of Waste Materials for Asphalt Concrete and Bitumen: A Review“. Materials 13, Nr. 7 (25.03.2020): 1495. http://dx.doi.org/10.3390/ma13071495.
Der volle Inhalt der QuelleAnnotation:
Waste management has become an issue of increasing concern worldwide. These products are filling landfills and reducing the amount of livable space. Leachate produced from landfills contaminates the surrounding environment. The conventional incineration process releases toxic airborne fumes into the atmosphere. Researchers are working continuously to explore sustainable ways to manage and recycle waste materials. Recycling and reuse are the most efficient methods in waste management. The pavement industry is one promising sector, as different sorts of waste are being recycled into asphalt concrete and bitumen. This paper provides an overview of some promising waste products like high-density polyethylene, marble quarry waste, building demolition waste, ground tire rubber, cooking oil, palm oil fuel ash, coconut, sisal, cellulose and polyester fiber, starch, plastic bottles, waste glass, waste brick, waste ceramic, waste fly ash, and cigarette butts, and their use in asphalt concrete and bitumen. Many experts have investigated these waste materials and tried to find ways to use this waste for asphalt concrete and bitumen. In this paper, the outcomes from some significant research have been analyzed, and the scope for further investigation is discussed.
19
Budiman, Lucky, und Silvia Sukirman. „Studi Penggunaan Batu Kapur Kalipucang sebagai Substitusi Sebagian Agregat Halus Beton Aspal Jenis AC-BC (Hal. 45-55)“. RekaRacana: Jurnal Teknil Sipil 4, Nr. 1 (27.02.2018): 45. http://dx.doi.org/10.26760/rekaracana.v4i1.45.
Der volle Inhalt der QuelleAnnotation:
ABSTRAKPerkerasan jalan adalah campuran antara agregat dan bahan pengikat, berfungsi melayani beban lalu lintas. Agregat yang biasa digunakan untuk perkerasan jalan adalah batu pecah dan bahan lainnya. Batu kapur adalah batuan sedimen yang terusun dari kalsium karbonat (CaCO3) dalam bentuk mineral kalsit. Batu kapur merupakan salah satu mineral industri yang banyak digunakan oleh sektor industri dan konstruksi. Tujuan penelitian ini antara lain untuk mengetahui karakteristik batu kapur dan penggunaan batu kapur Kalipucang sebagai substitusi agregat halus dari campuran beton aspal jenis AC-BC, dengan penambahan batu kapur sebanyak 50% dari dari agregat halus. Berdasarkan hasil analisis data pengujian didapatkan nilai stabilitas dari beton aspal substitusi batu batu kapur lebih tinggi dibandingan dengan campuran beton aspal tanpa batu kapur, yaitu 1.800 kg untuk campuran substitusi batu kapur dan 1.600 kg untuk campuran tanpa batu kapur. Sifat volumetrik beton aspal dari kedua campuran yaitu dan memenuhi spesifikasi yang telah ditentukan.Kata kunci: laston AC-BC, batu kapur, substitusiABSTRACTThe pavement street is a mixture between of aggregates and binders,the function is serving the traffic load. The aggregate commonly used for street pavement are broken stone and other materials. Limestone is sedimentary rock are composed of calcium carbonate (caCO3) in the mineral form of calcite.Limestone is one of a mineral an industry that is much used by the industrial and construction sectors. The purpose of this research include to know characteristic limestone and the use of limestone Kalipucang as a substitution of fine aggregate from a mixture of asphalt concrete of AC-BC,by the addition of limestone 50% of the fine aggregate. Based on the results of data analysis testing obtained the value of the stability from concrete asphalt the substitution of limestone higher than being with a mixture of asphalt concrete without limestone, that is 1,800 kg to mixed the substitution of limestone and 1,600 kg to mix without limestone. Volumetric properties of asphalt concrete of two mixetures is and meet specifications which has been determined.Keywords: laston AC-BC, limestone, substitution
20
Dobrowolski, Joe, und Terrie Bressette. „Development of Quality Control/ Quality Assurance Specifications by Using Statistical Quality Assurance for Asphalt Concrete Pavements in California“. Transportation Research Record: Journal of the Transportation Research Board 1632, Nr. 1 (Januar 1998): 13–21. http://dx.doi.org/10.3141/1632-02.
Der volle Inhalt der QuelleAnnotation:
Since 1992, the California Department of Transportation (Caltrans) has been working to improve quality in construction contracting and ultimately the quality of the product provided to the public. In 1996, Caltrans implemented quality control/quality assurance (QC/QA) specifications for asphalt concrete paving. These specifications require contractor QC and provide rewards or penalties based on statistical quality analysis of eight quality characteristics. These specifications were developed through a joint Caltrans/industry group and are supplemented with a QC manual. They were introduced through presentations to user/producer groups, appointment of district QC/QA coordinators, and training for engineers. In March 1996 the first project using QC/QA specifications for asphalt concrete went to bid and in the first year six projects were completed with them. Early projects were for the most part successful. Throughout 1996-1997, the specifications, the QC manual, and the implementation program were reviewed. Revisions to the specifications have been developed. The specifications and manual, issues, recommendations based on the 1996 projects, changes Caltrans has made for the continued use of QC/QA for asphalt concrete, and anticipated additional endeavors in the areas of QC/QA and materials testing are discussed here.
21
Choudhary, Jayvant, Brind Kumar und Ankit Gupta. „Performance evaluation of asphalt concrete mixes having copper industry waste as filler“. Transportation Research Procedia 48 (2020): 3656–67. http://dx.doi.org/10.1016/j.trpro.2020.08.083.
Der volle Inhalt der Quelle
22
Sang, Levy, Temitope Idowu und Victoria Okumu. „EVALUATION OF THE PERFORMANCE OF WASTE MARBLE DUST AS A MINERAL FILLER IN HOT-MIX ASPHALT CONCRETE“. Journal of Civil Engineering, Science and Technology 12, Nr. 1 (30.04.2021): 1–14. http://dx.doi.org/10.33736/jcest.3337.2021.
Der volle Inhalt der QuelleAnnotation:
As the construction industry continues to evolve globally, there is a need to develop best practices geared towards achieving sustainable construction. Asphalt concrete’s demand has been increasing steadily with an estimated global demand of 122.5 million tons in 2019. This is driven primarily by the growth in construction activities in developing countries as each country works towards enhancing its transportation facilities to cater to the ever-expanding population. Hence, there are needs to develop newer and more efficient means of asphalt consumption. One of such is identifying cheaper or waste materials for use in Asphalt production. This study, therefore, examined the viability of waste marble dust (WMD), an industrial waste produced during the shaping and polishing of marble blocks and also during its extraction from the mines, as a mineral filler in Hot-mix asphalt (HMA) concrete. Engineering properties such as Marshall stability and flow, Void characteristics, Indirect tensile strength and Tensile strength ratio properties were examined. It was observed that the addition of WMD steadily increased the Marshall Stability and indirect tensile strength values and lowered the voids percentages. The study’s major finding is that waste marble dust is highly suitable as a mineral filler in HMA and a 3% by volume addition of WMD in HMA at 4.5% binder content produced the most optimal mix for use in road pavements.
23
Winayati, Winayati, und Fadrizal Lubis. „ANALISIS KARAKTERISTIK MARSHALL CAMPURAN AC-BC MENGGUNAKAN FILLER ABU TANDAN SAWIT DAN ABU BATU“. SIKLUS: Jurnal Teknik Sipil 4, Nr. 1 (20.04.2018): 51–58. http://dx.doi.org/10.31849/siklus.v4i1.1129.
Der volle Inhalt der QuelleAnnotation:
Lapis aspal beton atau AC (Asphalt Concrete) merupakan salah satu campuran beraspal dengan kekuatan campuran ditentukan oleh daya ikat (interlocking) antar agregat, bahan pengisi (filler) dan bahan pengikat (asphalt). Daya ikat antar agregat merupakan penyokong utama bagi kekuatan dan performa material pada struktur perkerasan. Oleh karena itu, permukaan jalan dapat menahan beban dengan baik ketika kendaraan melewatinya (Ahmad, 2010). AC-BC (Asphalt Concrete-Binder Course) adalah salah satu dari tiga macam campuran Asphalt Concrete, yaitu AC-BC (Asphalt Concrete-Binder Course), AC-WC (Asphalt Concrete-Wearing Course), AC-Base, perbedaan ketiga campuran ini terletak pada perbedaan ukuran bahan agregat yang digunakan sesuai dengan Spesifikasi Umum Bina Marga 2010. Pemilihan jenis material sebagai filler sangat penting karena filler merupakan bahan pengisi yang sifatnya halus dan dapat mengisi rongga atau pori yang mempunyai diameter lebih kecil atau kurang dari 0,002 mm. Salah satu limbah yang dihasilkan oleh industri perkebunan kelapa sawit memberikan peluang alternatif material penyusun campuran aspal (filler). Sebagai gambaran umum bahwa pabrik yang mengolah kelapa sawit dengan kapasitas 200 ton TBS/hari akan menghasilkan abu tandan sawit sebesar 10,8 %/ hari (Fauzi dkk, 2002). Berdasarkan pengujian awal terhadap abu tandan sawit, dari analisis saringan diperoleh hasil bahwa abu tandan sawit 65% lolos saringan No.200, pada pengujian saringan basah dan penentuan indeks plastisitas filler abu tandan sawit telah memenuhi gradasai yang ditentukan. Selain aspal agregat kasar dan agregat halus, bahan pengisi (filler) adalah salah satu komponen dalam campuran yang mempunyai peranan besar pada sifat-sifat Marshall. Rekomendasi penelitian Afrian (2016), campuran AC-BC yang memenuhi Spesifikasi Umum Bina Marga 2010, yakni 25% filler abu tandan sawit dicampur dengan 75% abu batu dari berat total filler dalam campuran. Berdasarkan rekomendasi tersebut, penelitian dilanjutkan dengan analisis karakteristik Marshall campuran AC-BC yang menggunakan komposisi campuran 50% filler abu tandan sawit dicampur dengan 50% abu batu, dengan menganalisis karakteristik Marshall, antara lain: stabilitas 920.118, flow didapat 3.7, VIM 4.006, VMA 15.930, MQ 240.722 juga masih memenuhi Standar Binamarga 2010.
24
Lukashevich, O. D., und V. N. Lukashevich. „IMPROVEMENT OF ENVIRONMENTAL SAFETY IN CONSTRUCTION AND ROAD SERVICE“. Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture 22, Nr. 5 (31.10.2020): 200–210. http://dx.doi.org/10.31675/1607-1859-2020-22-5-200-210.
Der volle Inhalt der QuelleAnnotation:
The paper considers the road transportation sector in the context of the negative impacts of the global economic and financial crises on the environment. The ecology-oriented development of the road construction, road repair and maintenance are described herein. The promising research and innovation development in Siberia includes the ways to increase the stability of asphalt concrete pavements, studying the possibilities of waste utilization produced by the local industrial enterprises (for example, stillage residues of the chemical industry) for the road asphalt modification; replacement of rock materials used in the upper and lower layers of the pavement coatings by by-passed stone, utilization of plastics scrap and rubber in polymer modification.
25
Patel, Arti, Marshall Thompson, Eric Harm und William Sheftick. „Developing QC/QA Specifications for Hot Mix Asphalt Concrete in Illinois“. Transportation Research Record: Journal of the Transportation Research Board 1575, Nr. 1 (Januar 1997): 66–74. http://dx.doi.org/10.3141/1575-10.
Der volle Inhalt der QuelleAnnotation:
The Illinois Department of Transportation (IDOT) has recently undertaken a quality management program to improve the quality of construction, allow more innovation, and reduce IDOTs management of industry construction programs. The Asphalt Concrete (AC) Quality Control/Quality Assurance (QC/QA) program is a significant part of this quality management program. IDOT accredits the success of the AC QC/QA program to gradual implementation and contractor and industry involvement. In 1991, four projects were constructed under a newly developed QC/QA specification. After reviewing and evaluating feedback from the contractors and IDOT personnel, the specification was revised for use on 1992 projects. In 1992, IDOT let 30 QC/QA projects, and in 1993, 65 QC/QA projects. In 1994 and 1995, most AC projects containing over 225 metric tons (250 tons) of hot-mix asphalt (HMA) were designated as QC/QA projects. In conjunction with this effort on AC quality, an aggregate certification program was implemented. The program ensures that aggregate gradation is highly controlled and is acceptable for incorporation into the mixture. Training programs for contractor QC and aggregate certification were also implemented. Analysis of the data indicates an increase in uniformity of the HMA, potentially leading to a 15 percent increase in fatigue life. IDOT is now examining the implications of developing end-result and performance-related specifications (ERS/PRS) for the AC QC/QA program. In the summer of 1996, one QC/QA project was shadowed and evaluated based on newly developed ERS/PRS.
26
Chen, Jian-Shiuh, und Chin Hung Yang. „Porous asphalt concrete: A review of design, construction, performance and maintenance“. International Journal of Pavement Research and Technology 13, Nr. 6 (November 2020): 601–12. http://dx.doi.org/10.1007/s42947-020-0039-7.
Der volle Inhalt der QuelleAnnotation:
AbstractPorous asphalt concrete (PAC) is an open-graded friction course that is specifically designed to have high air void contents for removing water from the pavement surface. PAC surfaces, which include open-graded friction courses, permeable friction courses, and drainage asphalt pavements, have increasingly gained acceptance among agencies and industry in the world. PAC might be susceptible to freeze-thaw damage in cold climates and require winter maintenance practices. The life span of PAC pavements shows a large variation depending on climates, traffic volumes and loadings, design and construction practices. The objective of this paper was to review design, construction, and performance that could maximize the advantages and minimize the disadvantages associated with the use of PAC mixtures. A consolidated review of the worldwide literature on PAC applications was conducted, with attention to the use of PAC in agency practices, and specifications for PAC from the world were evaluated. Based on an analysis of the results of this review, two key features were emphasized: (1) a recommended practice for material selection and design of PAC, and (2) a recommended practice for PAC construction and maintenance. Key points include a careful assessment of the PAC drainage and an adequate asphalt content to improve the performance of the pavement surface. A proper binder content stabilized by additives such as fibers and polymers is essential to ensure sufficient film thickness that is critical to the durability of the PAC mix in the long run.
27
Lou, Baowen, Zhuangzhuang Liu, Aimin Sha, Meng Jia und Yupeng Li. „Microwave Absorption Ability of Steel Slag and Road Performance of Asphalt Mixtures Incorporating Steel Slag“. Materials 13, Nr. 3 (02.02.2020): 663. http://dx.doi.org/10.3390/ma13030663.
Der volle Inhalt der QuelleAnnotation:
Excessive usage of non-renewable natural resources and massive construction wastes put pressure on the environment. Steel slags, the main waste material from the metal industry, are normally added in asphalt concrete to replace traditional aggregate. In addition, as a typical microwave absorber, steel slag has the potential to transfer microwave energy into heat, thus increasing the limited self-healing ability of asphalt mixture. This paper aims to investigate the microwave absorption potentials of steel slag and the effect of its addition on road performance. The magnetic parameters obtained from a microwave vector network analyzer were used to estimate the potential use of steel slag as microwave absorber to heal cracks. Meanwhile, the initial self-healing temperature was further discussed according to the frequency sweeping results. The obvious porous structure of steel slag observed using scanning electron microscopy (SEM) had important impacts on the road performance of asphalt mixtures. Steel slag presented a worse effect on low-temperature crack resistance and water stability, while high-temperature stability can be remarkably enhanced when the substitution of steel slag was 60% by volume with the particle size of 4.75–9.5 mm. Overall, the sustainability of asphalt mixtures incorporating steel slag can be promoted due to its excellent mechanical and microwave absorption properties.
28
Stempihar, Jeffrey J., Tina Pourshams-Manzouri, Kamil E. Kaloush und Maria Carolina Rodezno. „Porous Asphalt Pavement Temperature Effects for Urban Heat Island Analysis“. Transportation Research Record: Journal of the Transportation Research Board 2293, Nr. 1 (Januar 2012): 123–30. http://dx.doi.org/10.3141/2293-15.
Der volle Inhalt der QuelleAnnotation:
Increased nighttime temperatures caused by retained heat in urban areas is a phenomenon known as the urban heat island (UHI) effect. Urbanization requires an increase in pavement surface area, which contributes to UHI as a result of unfavorable heat retention properties. In recent years, alternative pavement designs have become more common in an attempt to mitigate the environmental impacts of urbanization. Specifically, porous pavements are gaining popularity in the paving industry because of their attractive storm water mitigation and friction properties. However, little information regarding the thermal behavior of these materials is available. This paper explores the extent to which porous asphalt pavement influences pavement temperatures and investigates the impact on UHI by considering the diurnal temperature cycle. A one-dimensional pavement temperature model developed at Arizona State University was used to model surface temperatures of porous asphalt, traditional dense-graded asphalt, and portland cement concrete pavements. Scenarios included variations in pavement thickness, structure, and albedo. Thermal conductivity testing was performed on porous asphalt mixtures to obtain values for current and future analysis. In general, porous asphalt exhibited higher daytime surface temperatures than the other pavements because of the reduced thermal energy transfer from the surface to subsurface layers. However, porous asphalt showed the lowest nighttime temperatures compared with other materials with a similar or higher albedo. This trend can be attributed to the unique insulating properties of this material, which result from a high air void content. As anticipated, the outcome of this study indicated that pavement impact on UHI is a complex problem and that important interactions between influencing factors such as pavement thickness, structure, material type, and albedo must be considered.
29
Hainin, Mohd Rosli, Nur Izzi Md Yusoff, Mohd Fahmi Mohammad Sabri, Mohd Azizi Abdul Aziz, Mohd Anwar Sahul Hameed und Wasid Farooq Reshi. „Steel Slag as an Aggregate Replacement in Malaysian Hot Mix Asphalt“. ISRN Civil Engineering 2012 (11.09.2012): 1–5. http://dx.doi.org/10.5402/2012/459016.
Der volle Inhalt der QuelleAnnotation:
As natural aggregate sources are becoming depleted due to high demand in road construction and the amount of disposed waste material keeps increasing, researchers are exploring the use of alternative materials which could preserve natural sources and save the environment. In this study, steel slag was used as an aggregate replacement in conventional dense graded asphalt mixes (ACW14 and ACB28). Steel slag was selected due to its characteristics, which are almost similar to conventional aggregates, and the fact that it is easily obtainable as a by-product of the steel industry. The same gradations of mixtures were produced using normal crushed aggregate as control samples. The Marshall mix design system was used for sample preparation in accordance with Malaysian specifications. Samples of asphaltic concrete were subjected to the resilient modulus test, creep test and rutting test. Samples made from steel slag show significantly better results than conventional aggregate. Therefore, utilization of steel slag will reduce land fill, save natural resources and improve the strength of pavement to sustain a higher volume of vehicles. This will shift the gear in sustainable pavement construction, which is most desirable in today’s energy deficient world.
30
Pokorný, Jaroslav, Radek Ševčík und Jiří Šál. „The Design and Material Characterization of Reclaimed Asphalt Pavement Enriched Concrete for Construction Purposes“. Materials 13, Nr. 21 (05.11.2020): 4986. http://dx.doi.org/10.3390/ma13214986.
Der volle Inhalt der QuelleAnnotation:
Reclaimed asphalt pavement (RAP) is a valuable commodity originating during processes of road/highways rehabilitations, resurfacing in the cases of the revelation of underneath-placed layers. Removed material can be successfully recycled and utilized as a supplementing material for new hot asphalt mixes. However, its dosages are limited because of variations in properties of aged bitumen compared to fresh material and, thus, a significant amount of waste material is remaining as waste products. Nonetheless, this commodity may find usage in the construction industry that suffers from a shortage of high-quality and easily available aggregates. This work aimed to investigate the optimal substitution of mined natural aggregate with commonly available RAP in order to produce composites with the comparable mechanical performance of reference ordinary Portland concrete. The aggregate substitutions up to 100% with RAP have been studied with a combination of mechanical and analytical techniques. Obtained experimental data showed changes in the porous structure, mineralogy, and in the amount of formed cement-related hydration products that influenced the mechanical performance of produced composites. Composite with 10% of natural aggregate substitution with RAP has shown the strength class C16/20 after 28 days of water curing, according to the EN 206-1. Such innovative products could be utilized in the construction industry. The usage of waste RAP could contribute to preservation of our environment for future generations.
31
Bystrov, N. V. „STANDARDIZATION OF PROPERTIES OF MODIFIED BITUMEN“. Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture, Nr. 5 (30.10.2018): 198–203. http://dx.doi.org/10.31675/1607-1859-2018-20-5-198-203.
Der volle Inhalt der QuelleAnnotation:
The article provides information on how to comply with normalized indicators of asphalt concrete quality through the use of modified bitumen. The article deals with the problem of the road industry associated with the need to streamline the current regulatory field that reflects requirements for bitumen with various modifiers introduced into compositions. The paper describes the foreign and domestic experience in quality standardization of bitumen with additive modifiers.
32
Garcia, Alvaro, Erik Schlangen und Martin Van de Ven. „Two Ways of Closing Cracks on Asphalt Concrete Pavements: Microcapsules and Induction Heating“. Key Engineering Materials 417-418 (Oktober 2009): 573–76. http://dx.doi.org/10.4028/www.scientific.net/kem.417-418.573.
Der volle Inhalt der QuelleAnnotation:
It is well known that asphalt concrete is a self healing material: immediately after both faces of a crack are in contact, the diffusion of molecules from one face to the other starts. If there are no more loads, this process takes place until the crack has completely disappeared and the material has recovered its original resistance [1]. To increase this healing rate two methods are proposed. The first one is a passive self-healing mechanism. Embedded encapsulated chemicals are used in the binder. When microcracks start appearing in the binder due to the combination of ageing and accumulated damage, they break the capsules and the chemicals enter the binder by diffusion. These chemicals repair the material, decreasing the stiffness and increasing the healing rates of bitumen. The second approach makes use of an active self healing mechanism. Local heating inside the material is used to repair the binder and to improve the properties again. This is realized by adding conductive particles to the binder and using induction energy to increase the temperature. These methods are a fairly new concept in the asphalt industry.
33
ShEINA, T. V., und A. A. TsUKER. „COMPOSITE ORGANIC BINDER BASED ON TECHNOLOGICAL WASTE OF DRILLING ENGINEERING INDUSTRY COMPANYS“. Urban construction and architecture 1, Nr. 1 (15.02.2011): 117–22. http://dx.doi.org/10.17673/vestnik.2011.01.23.
Der volle Inhalt der QuelleAnnotation:
In the article the rubber compound composition is considered in detail. It is used in rubber rings of cone drill bit at Volgaburmashjoint stock company. In the laboratory the omposite organic binder was prepared on the basis of bitumen, oil-slime and crashed rubber waste of gasket rubber rings of cone drill bit (fr. 1mm). This binder has extremely heat stability and crack resistance and as a result it has wide range of plasticity at high and low temperatures. On the basis of this organic binder asphalt concrete with improved heat, crack and water resistance was prepared.
34
Muhammad Riski, Febrina Dian Kurniasari und Bunyamin. „The Effect of Mixing Natural Aggregates with Artificial Aggregates on Marshall Parameters“. Jurnal Inotera 6, Nr. 1 (28.01.2021): 10–19. http://dx.doi.org/10.31572/inotera.vol6.iss1.2021.id135.
Der volle Inhalt der QuelleAnnotation:
In general, aggregates consist of Natural Aggregates (NA) and Artificial Aggregates (AA). Artificial aggregates, such as Crushed Stone (CS), are aggregates produced through the crusher industry which has a rough and angular surface so that it has excellent adhesion to asphalt. Meanwhile, NA is an aggregate produced from a river which has a smooth and large hollow surface texture. The cost for AA is very expensive when compared to NA, so it is necessary to experiment with mixing NA and AA to minimize the use of AA. NA are obtained from Sungai Jalin, Jantho City District, Aceh Besar District. The method used refers to the specification of Bina Marga 2010 Revision four (2018) and the Indonesian National Standard (SNI). The purpose of this study was to see the effect of the combination of NA and AA as a substitute for coarse aggregate on the AC-WC concrete asphalt layer. The specimens used were 66 specimens with substitution of NA and AA into the asphalt layer were 0% NA: 100% AA, 25% NA: 75% AA, 50% NA: 50% AA, 75% NA: 25% AA, 100% NA : 0% AA. Based on the research results, the best value for the optimum marshall parameter is the substitution of 25% AA: 75% BP at asphalt content of 5.00%, the stability value is 1492.37kg with a VIM value of 3.69%, VMA 16.17%, VFA 77.88% and MQ 573.87kg / mm which have met the requirements of the 2010 Revision four (2018) Bina Marga specification.
35
Chertes, Konstantin L., und Nikolay I. Shestakov. „Modern biopositive technologies of waste processing in the utilities and construction industries“. Vestnik MGSU, Nr. 8 (August 2020): 1135–46. http://dx.doi.org/10.22227/1997-0935.2020.8.1135-1146.
Der volle Inhalt der QuelleAnnotation:
Introduction. In this article the analysis of certain biopositive technologies applied to processing or recycling of construction waste, municipal sewage, and paste-like slurries of organo-mineral nature is performed. The relevance of this research is confirmed by the steadily growing number of publications and currently implemented government programmes aimed at solving such problems. The paper summarizes the results of research into the treatment of wastes having different origin.
Materials and methods. The analysis of the research literature and patents for inventions, as well as publicly available technologies used in waste processing and recycling is performed. Selection of biopositive technologies based on the chemical nature of materials and their groups is described. Biopositive technologies, most effectively applied to construction materials, are identified for the purpose of converting engineering structures into secondary raw components. The co-authors demonstrate the application of a biopositive technology to sludge decontaminated at municipal waste water treatment plants and to hot waste generated by the hydrolysis industry, as well as technologies used to process special thermal insulation and waterproofing materials.
Results. The use of water-organic emulsions as active components in effective regeneration of asphalt granulated concrete mixtures is considered. Сompositions, concentrations and sedimentation stability of such emulsions have been identified. The results of the study of physical, mechanical and hydro-physical properties of the asphalt-concrete granulate treated with water-organic emulsions are described. This regeneration technology helps bitumen to restore binding properties on the surface of the asphalt-concrete granulate and makes this composite applicable as a material designated for the bottom layers of the road pavement.
Conclusions. These biopositive technologies make it possible to efficiently and rationally process or recycle a wide range of municipal and construction waste into structures and products having various applications. Recycling, composting and plasma technologies are considered in this case.
36
Getahun, Mulusew, Stanley Shitote und Zachary Gariy. „Experimental Investigation on Engineering Properties of Concrete Incorporating Reclaimed Asphalt Pavement and Rice Husk Ash“. Buildings 8, Nr. 9 (23.08.2018): 115. http://dx.doi.org/10.3390/buildings8090115.
Der volle Inhalt der QuelleAnnotation:
Waste generation from agricultural and construction industries is growing at an upsetting rate that causes a heavy burden on landfill facilities. On the other hand, the construction industry is exhausting natural resources thereby posing environmental problems. This study investigates the potential use of agro-industrial waste such as rice husk ash (RHA) and construction waste like reclaimed asphalt pavement (RAP) as promising construction materials. The durability and physical and mechanical properties of concrete were assessed by partially replacing cement and virgin aggregates with RHA and RAP, up to 20% and 50%, respectively. A total of 22 mixes were studied, twelve of which were devoted to studying the collective effects of RHA and RAP on the engineering properties of concrete. Based on experimental results, RHA and RAP decreased slump, compacting factor, density, water absorption and sorptivity. RHA increased compressive and tensile splitting strength, whereas RAP decreased compressive and tensile splitting strength. Comparable strength and favorable sorptivity values were obtained when 15% RHA was combined with up to 20% RAP in the concrete mix. Thus, utilizing RHA and RAP as concrete ingredients can contribute to solid waste management, engineering and economic benefits.
37
Ibrahimi, Izet, Nurten Deva und Skender Muqolli. „Integrated dry granulation – possibility of reducing environmental pollution and valorization of Fe-Ni slag“. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, Nr. 3 (2021): 25–30. http://dx.doi.org/10.33271/nvngu/2021-3/025.
Der volle Inhalt der QuelleAnnotation:
Purpose.The aim of our research consists in argumentation of the possibility of transformation of slag from potential pollutants into a new material used and its promotion as an alternative raw material for the production of consumable layers of asphalt concrete for highway. Methodology.The research on the possibility of using the slag of the electric furnace in Ferronickel Foundery is based on the practice of CISRO and Sumitomo Metals Industri in Japan, while the products of this process, in accordance with the standards EN12697-1:2006, EN12697-23, EN12697-12, EN 12697-27 dhe DD226-26/2004, have been used as aggregates for the production of asphalt concrete in the AHN Group-Kosovo. Findings.This paper presents the results from a study program related to minimizing the pollution impact of Fe-Ni slag landfill in Drenas, through valorization and improvement of physical-mechanical properties of slag according to the method of integrated dry granulation and using it afterwards as aggregate for the production of AC11 surf. Originality.Laboratory analyses were conducted in specialized laboratory and data presented are achieved through the use of devices and equipment that are necessary for experimental research, thus the obtained results are original data presented in this paper. Practical value.From the research data it has been proved that the conversion of Fe-Ni slag from wastes with high pollutant potentials into aggregates valuable for industry would express significant economic and environmental effects.
38
Khrustalev, B. M., T. Liu, A. V. Busel, G. Li, V. A. Verenko, V. V. Zankovich und E. A. Busel. „Environmentally sustainable technologies for the use of China industry waste for regeneration of asphalt concrete pavements“. Proceedings of the National Academy of Sciences of Belarus, Chemical Series 56, Nr. 3 (29.08.2020): 374–84. http://dx.doi.org/10.29235/1561-8331-2020-56-3-374-384.
Der volle Inhalt der Quelle
39
Yang, Yan Mei, und Shi Qiang Wei. „A Recycling Review of Construction Waste in China's Road Construction Industry“. Advanced Materials Research 433-440 (Januar 2012): 1945–49. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.1945.
Der volle Inhalt der QuelleAnnotation:
Many kinds of construction wastes are now produced in China. Recycling disposal of construction wastes not only alleviate pressure on the environment but also identify certain economic and social benefits. This paper undertakes a timely review of recycling disposal of construction waste in China's Road Construction Industry. The paper presented definitions of construction wastes and described the current situation of construction wastes in China. Considering the research findings which have been achieved in the field of waste disposal, this paper discussed the approaches to recycle construction wastes in China including abandoned concrete, waste asphalt, old brick, waste timber, sewage sludge. The conclusion makes recommendations that are deemed to offer substantial benefits for both the road construction industry and society as a whole.
40
“Skip” Brown, Norman R. „Solution for Distressed Pavements and Crack Reflection“. Transportation Research Record: Journal of the Transportation Research Board 1819, Nr. 1 (Januar 2003): 313–17. http://dx.doi.org/10.3141/1819a-45.
Der volle Inhalt der QuelleAnnotation:
It is commonly accepted that cracks in aged asphalt pavements will reflect through seal coat and overlay applications. Pavement fabric placed under asphalt concrete overlays will slow this crack reflection, but not stop it. Nineteen years of experience working with the same fabric under a double chip seal has shown that using a modified technique, developed through trial and experimentation, adds substantial pavement life at a reduced cost over typical methods of repair used in the industry. In addition, pavement deterioration due to oxidation and stripping has been eliminated because air and water are unable to penetrate the surface. The subgrade dries out and regains its original strength, minimizing deflection under traffic loadings. This method reduces crack reflection by more than 90% over alternate methods. The reduction is due mainly to a regaining of the subgrade strength along with an increase in the flexibility of the surface through the use of a higher percentage of oil in the total mix. The most surprising aspect of this process is that alligatored pavement can be repaired without having to remove and replace the damaged pavement.
41
Levkivska, Liydmyla, und Jafar Musa Elallak. „Analysis factors affecting formation on the clutch durability between asphalt-concrete layers of road clothing“. Automobile Roads and Road Construction, Nr. 109 (2021): 26–31. http://dx.doi.org/10.33744/0365-8171-2021-109-026-031.
Der volle Inhalt der QuelleAnnotation:
This article reflects the importance of the road network for the social development of society and the development of the economy of the country as a whole. On the basis of literary sources provides complex analysis of roads in Ukraine, their current functional state and tendencies of development. It is established that the road industry is in a rather difficult situation due to unsatisfactory transport and operational conditions of the vast majority of Ukrainian roads. Construction of new roads is extremely rare because of lack of financial resources. Road works are usually carried out to preserve the network of already existing roads and to ensure their necessary transport and operational status. According to the results of the analysis, one of the main reasons for the premature destruction of newly constructed or repaired non-rigid pavements is the low strength of interlayer adhesion in the contact area of the newly covered material with the layer below. The effect of clutch durability between asphalt layers on the road strength has been studied in detail. A number of factors that affect the quality of clutch durability between layers are analyzed. It is established that in order to ensure the strength of grafting between asphalt concrete layers of road clothing, it is necessary to strictly observe the technological regimes of their laying, above all temperature; to take into account the physical and mechanical properties of materials at the construction stage and the influence of climatic and mechanical factors, or most often their complex effect on the operation of the highway.
42
Speakman, Jim, und Harris N. Scott. „Ultra-Thin, Fiber-Reinforced Concrete Overlays for Urban Intersections“. Transportation Research Record: Journal of the Transportation Research Board 1532, Nr. 1 (Januar 1996): 15–20. http://dx.doi.org/10.1177/0361198196153200103.
Der volle Inhalt der QuelleAnnotation:
An industry partnership involving state and local highway officials; ready mix concrete producers; and fiber, admixture, and cement suppliers paved the way for extensive testing of a new concrete technology in Tennessee. Known as ultra-thin whitetopping (UTW), this experimental repair procedure involves placing a layer 50 to 75 mm (2 to 3 in.) thick of high-strength concrete over milled asphalt. Crucial to a long life for the thin concrete is a high synthetic fiber content, normally 1.4 kg/m3 (3 lbs/yd3) with joints spaced at a minimum of 0.92 to 1.22 m (3 to 4 ft) on center. From 1992 to 1995, seven cities in Tennessee participated in UTW demonstrations. The field tests were so successful that synthetic fiber-reinforced UTW is now being bid on many state and local projects. Presently, the primary use of UTW is to rehabilitate high average daily traffic intersections. Other potential uses include overlays of residential streets, parking lots, and airport aprons.
43
Mansurov, Z. A., E. K. Ongarbaev und B. K. Tuleutaev. „Utilization of Oil Wastes for Production of Road-building Materials“. Eurasian Chemico-Technological Journal 2, Nr. 2 (16.04.2016): 161. http://dx.doi.org/10.18321/ectj374.
Der volle Inhalt der QuelleAnnotation:
<p>The pollution of environment by oil spills in the process of extraction, refining and transporting of oil is an important ecological problem of oil industry. Composition and properties of the oil sludge and il contaminated soil taken from the area of Zhetybai – Uzen – Atyrau pipeline failure have been investigated aiming at development of oil waste utilization methods. The offered thermal method of organic fraction extraction allows to decrease the organic fraction content by 15–20 %. It is shown that the recovered oil may be used for the bitumen production, and the solid residue – as a component of cold asphalt concrete.</p>
44
Gaudenzi, Elena, Francesco Canestrari, Xiaohu Lu und Fabrizio Cardone. „Performance Assessment of Asphalt Mixture Produced with a Bio-Based Binder“. Materials 14, Nr. 4 (15.02.2021): 918. http://dx.doi.org/10.3390/ma14040918.
Der volle Inhalt der QuelleAnnotation:
Nowadays, the growing energy costs and pressing worldwide demand for petroleum-based products create a strong need to develop alternative binders deriving from green and renewable sources. Bio-binders (or bitumen added to bio-based materials) can potentially be a viable alternative for the production of bituminous mixture, promoting the circular economy as well as environmental sustainability principles without reducing the overall performance of the mixture. In this context, the current study focuses on evaluation of the effects of a bio-binder on the mechanical response of asphalt concrete (AC) produced with it. In particular, a 10% bio-oil deriving from a by-product of the paper industry has been blended with a conventional 50/70 penetration grade bitumen to obtain the bio-binder. Moreover, plain bitumen having the same consistency was chosen to produce a reference AC. Two dense-graded AC wearing courses were prepared in the laboratory according to Italian technical specifications. A mechanical characterization in terms of indirect tensile strength, indirect tensile stiffness modulus, fatigue response and permanent deformation resistance was performed on gyratory compacted specimens using both conventional and performance tests. In addition, aging and water sensitivity of the AC specimens were evaluated. Overall results highlight that the AC produced with the bio-binder did not show reduced mechanical properties and it was comparable to the reference AC regardless of aging and water conditioning. This highly encourages the use of bio-binder as a viable alternative in asphalt technology.
45
Sokolov, L. I., A. N. Tyanin und K. L. Sokolov. „Reuse of Treated Surface Runoff at a Bearing Factory“. Ecology and Industry of Russia 25, Nr. 3 (10.03.2021): 14–17. http://dx.doi.org/10.18412/1816-0395-2021-3-14-17.
Der volle Inhalt der QuelleAnnotation:
The results of studies of cutting fluids on three types of solvents are presented: distilled water, tap water and treated surface effluents of the factory. It has been proven that replacing tap water with treated surface wastewater when preparing soda-nitrite solutions does not affect the operational and functional properties of the coolant. The possibility of using the treated surface runoff of a bearing factory for the preparation of coagulant solutions for the purpose of using it in the purification of emulsion wastewater has been confirmed. Shown are the directions of recycling waste treatment of the surface runoff of the factory, in particular in the construction industry in the production of asphalt concrete.
46
Mohajerani, Abbas, Siu-Qun Hui, Mehdi Mirzababaei, Arul Arulrajah, Suksun Horpibulsuk, Aeslina Abdul Kadir, Md Tareq Rahman und Farshid Maghool. „Amazing Types, Properties, and Applications of Fibres in Construction Materials“. Materials 12, Nr. 16 (07.08.2019): 2513. http://dx.doi.org/10.3390/ma12162513.
Der volle Inhalt der QuelleAnnotation:
Fibres have been used in construction materials for a very long time. Through previous research and investigations, the use of natural and synthetic fibres have shown promising results, as their presence has demonstrated significant benefits in terms of the overall physical and mechanical properties of the composite material. When comparing fibre reinforcement to traditional reinforcement, the ratio of fibre required is significantly less, making fibre reinforcement both energy and economically efficient. More recently, waste fibres have been studied for their potential as reinforcement in construction materials. The build-up of waste materials all around the world is a known issue, as landfill space is limited, and the incineration process requires considerable energy and produces unwanted emissions. The utilisation of waste fibres in construction materials can alleviate these issues and promote environmentally friendly and sustainable solutions that work in the industry. This study reviews the types, properties, and applications of different fibres used in a wide range of materials in the construction industry, including concrete, asphalt concrete, soil, earth materials, blocks and bricks, composites, and other applications.
47
Cleveland, Gregory S., Robert L. Lytton und Joe W. Button. „Using Pseudostrain Damage Theory to Characterize Reinforcing Benefits of Geosynthetic Materials in Asphalt Concrete Overlays“. Transportation Research Record: Journal of the Transportation Research Board 1849, Nr. 1 (Januar 2003): 202–11. http://dx.doi.org/10.3141/1849-22.
Der volle Inhalt der QuelleAnnotation:
Reflective cracking is one of the more serious distresses associated with existing hot-mix asphalt (HMA) or portland concrete cement pavements overlaid with a thin bituminous layer. Preventive maintenance techniques have included incorporating geosynthetic materials (defined here as grids, fabrics, or composites) into the pavement structure. These materials have exhibited varying degrees of success, and their use within a particular agency has been based primarily on local experience or a willingness to try a product that appears to have merit. A methodology is described that was used to compare the relative effectiveness of six commercially available geosynthetic materials in reducing the severity or delaying the appearance of reflective cracking in HMA overlay. Each geosynthetic material was incorporated into compacted HMA specimens and tested to failure. Engineering fracture mechanics and pseudostrain energy concepts based on the elastic-viscoelastic correspondence principle were used and demonstrated to be appropriate and efficient in characterizing the fatigue damage process. By considering the effects of the geosynthetic products on the loading and unloading paths of the HMA specimens, a new concept was developed and termed the reinforcing factor, R. The use of this value allows the industry to characterize the relative reinforcing benefits of geosynthetic materials in reducing reflective cracking in HMA overlays. A crack speed index was then derived to summarize the complex interactions of the material properties. In general, grids and composites performed better than fabrics, which in turn performed better than a thin tacked surface as compared with unreinforced specimens. Design equations were developed between the fracture properties of the geosyntheticmixture system and the relaxation modulus properties of the HMA, which can be used in forward-calculating design methods to predict the rate of crack growth and support the design of an HMA overlay to resist reflective cracking. To calibrate the design equations, comparative field test pavements were constructed in three regions of Texas (Amarillo, Waco, and McAllen) using each geosynthetic material. These pavements will be monitored over the next 4 years.
48
Kassem, Hussein, Ghassan Chehab und Shadi Najjar. „Effect of Asphalt Mixture Components on the Uncertainty in Dynamic Modulus Mastercurves“. Transportation Research Record: Journal of the Transportation Research Board 2674, Nr. 5 (09.04.2020): 135–48. http://dx.doi.org/10.1177/0361198120914292.
Der volle Inhalt der QuelleAnnotation:
Practitioners and researchers in the paving industry have highlighted the importance of the adoption of reliability-based pavement design. The goal of developing reliable pavements with optimum performance over their design life has become a key factor to be considered during both pavement design and construction processes. This requires the adoption of statistical and probabilistic-based analyses for the formulation of the properties and behavior of pavement materials. Thus, many researchers worked on the quantification and modeling of the uncertainty caused by the inherent variability in pavement materials in general and that of asphalt concrete (AC) in particular. The dynamic modulus (| E*|), a fundamental property for mechanistic-empirical and purely mechanistic pavement designs, has been proven to have a significant level of uncertainty that is dependent on climatic and traffic loading conditions. The main objective of this study is to investigate the effect of the AC mixture properties and components on the uncertainty in the | E*| mastercurve. This objective is achieved by conducting an experimental program incorporating four different mixtures having the same material sources but different binder types and gradations. Monte Carlo simulations are used to model the uncertainty of | E*| for each of these mixtures. The paper shows that the uncertainty is dependent on mixture type, as the presence of larger nominal maximum aggregate size, modified binder, or additive can increase the uncertainty in the | E*| mastercurve, especially at high temperatures or slow loading rates. The uncertainty is proven to be material related and not imposed by the testing instrumentation.
49
Kulagina, Liudmila, Tamara Yenutina und Irina Kirillova. „Increasing the energy efficiency and environmental safety of the operation of smallvolume furnaces by adding a water-fuel mixture and organic components“. E3S Web of Conferences 295 (2021): 02002. http://dx.doi.org/10.1051/e3sconf/202129502002.
Der volle Inhalt der QuelleAnnotation:
Industrialisation is trending manufacturing revolution vector, an urgent task is to increase the energy efficiency and environmental safety of small-volume furnaces processes, which are widely applied in the agricultural industry, asphalt concrete plants, etc. In many countries, there are practically no working coal mines or open-pit mines left. However, in a number of regions, coal waste remained in the form of coal dust, ash or in the form of sludge. Utilization of coal dust by preparation of coal-water fuel (CWF) with subsequent combustion of the mixture is currently being applied as the most suitable method. The article discusses improvement of the technology for the preparation of coal-water fuel by applying the effects of hydrodynamic cavitation and adding waste from the livestock complex.
50
Makoundou, Christina, Kenth Johansson, Viveca Wallqvist und Cesare Sangiorgi. „Functionalization of Crumb Rubber Surface for the Incorporation into Asphalt Layers of Reduced Stiffness: An Overview of Existing Treatment Approaches“. Recycling 6, Nr. 1 (08.03.2021): 19. http://dx.doi.org/10.3390/recycling6010019.
Der volle Inhalt der QuelleAnnotation:
The substitution of mineral aggregates with crumb rubber (CR) from waste end-of-life tires (ELTs) in the asphalt concretes, has been considered a sustainable paving industry approach. The rubber has been used to construct pavements with proven enhanced resilience and improved durability. However, some issues related to the rubber’s surface adhesion or swelling may arise with these practices and generate complications (binder consumption, temperatures, mixing times). One possible solution to overcome the materials’ compatibility problems is to pre-treat the CR’s surface before its incorporation into the asphalt mixes to allow a surface functionalization that can enhance coverage and cohesion inside the mixes. The physical treatments using radiations-based beam are already exploited in the plastic recycling industries avoiding the use of chemicals in considerable amounts. Such treatments permit the recovering of large quantities of polymer-based materials and the enhancement of interfacial properties. This article provides an overview of existing surface treatments of polymers and especially rubber, including gamma ray, UV-ozone, microwaves, and plasma. Several studies have shown an overall improvement of the rubber surface’s reactive properties due to contaminant removal or roughness enhancement attributed to cross-linking or scission reactions occurring on the rubber’s surface layer. With those properties, the asphalt mixes’ phase stability properties are increased when the pre-treated rubber is incorporated. The treatments would permit to increase the CR quantities, yet reduce the layer stiffness, and improve the durability and the sustainability of future advanced road pavements.