Effect of gradation segregation on low-temperature crack resistance of asphalt pavement using 3D DEM

2021 ◽  
Vol 274 ◽  
pp. 122060
Author(s):  
Xu Chen ◽  
Changfa Ai ◽  
Jianhuan Du ◽  
Hongzhi He ◽  
Yangquan Huang
Keyword(s):  
Low Temperature ◽  
Crack Resistance ◽  
Asphalt Pavement ◽  
Temperature Crack

scholarly journals Effect of Polyester Fiber on Air Voids and Low-Temperature Crack Resistance of Permeable Asphalt Mixture

2020 ◽  
Vol 2020 ◽  
pp. 1-12 ◽  
Author(s):  
Jin-rong Wu ◽  
Fei Li ◽  
Qin-yong Ma
Keyword(s):  
Low Temperature ◽  
Crack Resistance ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Fiber Content ◽  
Polyester Fiber ◽  
Air Voids ◽  
Temperature Performance ◽  
Low Temperature Performance ◽  
Temperature Crack

With the rapid development of asphalt pavement, the drainage capacity of asphalt pavement is becoming more and more demanding. Therefore, it is imperative to study the permeable asphalt mixture. The air voids and the connected air voids are the main factors affecting the drainage function and low-temperature performance of asphalt pavement. In order to solve the drainage and low-temperature cracking problem, it is proposed to incorporate a certain amount of polyester fiber into the permeable asphalt mixture. This paper studies the air voids and low-temperature performance of asphalt mixture with different polyester fiber contents. It is concluded that with the increase of polyester fiber content, both the air voids and the connected air voids decrease first and then increase and reach the minimum value when the polyester fiber content is 0.4%. At this time, the low-temperature crack resistance of the permeable polyester fiber asphalt mixture is also the best.

Characteristics of Different Warm Mix Asphalt Compacted at Low Temperature

2011 ◽  
Vol 255-260 ◽  
pp. 3166-3170
Author(s):  
Li Ming Wang ◽  
Yi Qiu Tan ◽  
Zhen Wu Shi
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Crack Resistance ◽  
Temperature Stability ◽  
High Temperature Stability ◽  
Obvious Effect ◽  
Water Sensitivity ◽  
Active Additive ◽  
Surface Active ◽  
Temperature Crack

Additives on low temperature compaction and performances of compacted mixtures, the author devised low temperature environment compaction test, and then, comparison tests of volume parameters, high temperature stability, low temperature crack resistance and water sensitivity were conducted. Tests results showed that the wax additives and the surface-active additive can significantly contribute to mixtures low-temperature compactibility. The wax additive helps to improve high temperature stability obviously, and has no significant contribution to low temperature crack resistance and water sensitivity. The surface-active additive directly reduces water sensitivity, the wax additive indirectly plays the role of reducing water sensitivity by increasing the density of mixture, and the foam additive has no obvious effect on the water sensitivity.

scholarly journals Feasibility Evaluation of Preparing Asphalt Mixture with Low-Grade Aggregate, Rubber Asphalt and Desulphurization Gypsum Residues

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1481 ◽  
Author(s):  
Xiaoliang Zhang ◽  
Ben Zhang ◽  
Huaxin Chen ◽  
Dongliang Kuang
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Crack Resistance ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Asphalt Mixtures ◽  
Limestone Powder ◽  
Low Grade ◽  
High Temperature Stability ◽  
Temperature Crack

Road construction consumes great amounts of high-grade natural resources. Using low-grade natural rocks or some solid wastes as substitute materials is a hot topic. Considering this, the feasibility of using low-grade granite aggregate, solid waste-based filler (desulphurization gypsum residues, DGR) and binder (waste tire rubber modified asphalt, RMA) simultaneously in asphalt mixtures has been fully investigated in this research. The commonly used base asphalt and limestone powder (LP) filler were control groups. Material characteristics of raw materials mainly including micro-morphology, functional group, mineral phase, chemical composition and thermal stability were first evaluated in order to recognize them. Four asphalt mixtures (two asphalt binder and two filler) were then designed by standard Superpave method. Finally, a detailed investigation into the pavement performance of asphalt mixtures was carried out. The moisture damage resistance and low-temperature crack resistance were detected by the changing rules of stability, strength and fracture energy, and the high-temperature stability and fatigue performance were determined by wheel tracking test and indirect tensile (IDT) fatigue test, respectively. Results suggested that RMA and DGR both showed positive effects on the low-temperature crack resistance and fatigue property of the granite asphalt mixture. DGR also strengthened moisture stability. The contribution of RMA on high-temperature deformation resistance of the granite asphalt mixture was compelling. It can offset the insufficiency in high-temperature stability made by DGR. A conclusion can be made that asphalt mixture prepared with granite, DGR and RMA possesses satisfactory pavement performances.

scholarly journals Research on Low Temperature Performance of Emulsified Asphalt Cold Recycled Mixture and Improvement Measures Based on Fracture Energy

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3176
Author(s):  
Jialin Zhang ◽  
Mulian Zheng ◽  
Jianzhong Pei ◽  
Jiupeng Zhang ◽  
Rui Li
Keyword(s):  
Low Temperature ◽  
Crack Resistance ◽  
Fracture Energy ◽  
Influencing Factors ◽  
Engineering Application ◽  
Bending Test ◽  
Energy Index ◽  
Cracking Performance ◽  
Emulsified Asphalt ◽  
Temperature Crack

At present, there are no specific indicators and requirements for the low-temperature crack resistance of emulsified asphalt cold recycled mixture (CRME) in the Chinese road mixture specifications. In order to expand the application of this technology in the asphalt surface layer in cold areas, this paper studied the influence of 10 influencing factors on the low-temperature anti-cracking performance of CRME through the semicircular bending test (SCB) with fracture energy as the evaluation index. The research results show that the fracture energy index of the SCB test can be used to evaluate the low temperature crack resistance of CRME. After 10 kinds of influencing factors were analyzed, it was found that the biggest factor affecting the low-temperature cracking resistance of the mixture was the recycling agent, which had an effect on the fracture energy index of over 60%. Followed by cement, fiber and compaction work, the degree of influence exceeded 30%. Finally, combined with engineering application experience, some specific measures to improve the low-temperature anti-cracking performance of CRME were proposed.

The Weakening Effect of the Snow-Melting Agent on the Performance of Municipal Asphalt Pavement in the Severe Cold Region

2014 ◽  
Vol 953-954 ◽  
pp. 1604-1608 ◽  
Author(s):  
Yan Hui Liu ◽  
Hong Zhang ◽  
Xiao Long Wang ◽  
Liang Li
Keyword(s):  
Low Temperature ◽  
Asphalt Pavement ◽  
Cold Region ◽  
Snow Melting ◽  
Stiffness Modulus ◽  
The Road ◽  
Rule Changes ◽  
Bending Failure ◽  
Property Index ◽  
Temperature Crack

According to the phenomenon that the road would get frozen during the severe cold region in the high latitude area of Inner Mongolia, this paper study on low temperature crack resistance indexes of the asphalt pavement-the bending stiffness modulus, changing rules of stiffness modulus that is the low temperature anti-crack property index of the asphalt pavement, and bending failure characteristic. The rule changes with the density of the commonly used Chlorine salt snowmelt agent changes. Then the paper analyses how does the Chlorine salt snowmelt agent exert influences on the two kinds of aggregates of bituminous concrete. Finally, it is concluded that the snow-melting agent can weaken the performance of the asphalt pavement. The existing snow-melting agent will be replaced by Affordable and efficient pollution-free deicing in the future.

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