scholarly journals Study on the Performance and Adhesion Behavior of Ultrathin Wearing Course Using Calcined Bauxite as Aggregate

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Yanping Sheng ◽  
Runzhi Wang ◽  
Haichuan Jia ◽  
Wenli Qiu ◽  
Lei Feng ◽  
...  
Keyword(s):  
Low Temperature ◽  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Asphalt Pavements ◽  
Temperature Deformation ◽  
Water Stability ◽  
Road Maintenance ◽  
Laboratory Test Results ◽  
Deformation Ability ◽  
Pavement Construction

An ultrathin wearing course is an effective maintenance treatment for prolonging the service life of asphalt pavements, which have been widely used in the field of pavement construction and road maintenance. However, the repeated vehicle load and wear results in a decreased durability of ultrathin wear course cover pavement. Hence, the gradation of ultrathin wear course was designed using calcined bauxite in this study, and the water stability, low-temperature properties, resistance to permanent deformation, and salt erosion were investigated through a laboratory test. Results indicated that the addition of a nonammonia antistripping agent significantly improves the water stability of the asphalt mixture with calcined bauxite and its ability to resist salt erosion as well as improve its low-temperature deformation ability. At the same time, polyphosphoric acid improves the adhesion between asphalt and calcined bauxite aggregate and the high-temperature performance of asphalt mixture but has limited improvement in water stability and resistance to salt erosion. This research is conducive to the widespread use of calcined bauxite aggregates in road pavements and is of great significance for improving the durability of ultrathin wear course asphalt pavements.

Applied Research of the Modifying Agent of Rubber Plastic Composite (MaR) in Asphalt Mixture

2013 ◽  
Vol 477-478 ◽  
pp. 1175-1178
Author(s):  
Ling Zou ◽  
Jing Wei Ne ◽  
Weng Gang Zhang
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Asphalt Mixture ◽  
Bending Test ◽  
Water Stability ◽  
Modified Asphalt ◽  
Modifying Agent ◽  
Temperature Performance ◽  
Splitting Test ◽  
Low Temperature Performance

70# and 90# matrix asphalt mixture with MaR were studied through dynamic modulus test, rutting test, freeze-thaw splitting test, bending test to study the applicability of the Modifying agent of rubber plastic compound (MaR) in matrix asphalt mixture.Test results were Compared with SBSI-C modified asphalt mixture.The results indicate that: high-temperature stability of MaR+70# asphalt mixture is as well as SBSI-C modified asphalt mixture,and is bettere than MaR+90# asphalt mixture; water stability of MaR+90# asphalt mixture is bettere than SBSI-C modified asphalt mixture and MaR+70# asphalt mixture; low temperature performance of MaR+90# asphalt mixture is bettere than MaR+70# asphalt mixture, but is worse than modified asphalt mixture SBSI-C ; MaR+70# asphalt mixture can be first used in area of resisting high temperature and rutting, MaR+90# asphalt mixture can be used if the water stability performance and low temperature performance are considered.

scholarly journals Recycling Tire Rubber in Asphalt Pavements: State of the Art

2020 ◽  
Vol 12 (21) ◽  
pp. 9076
Author(s):  
Saud A. Alfayez ◽  
Ahmed R. Suleiman ◽  
Moncef L. Nehdi
Keyword(s):  
State Of The Art ◽  
Permanent Deformation ◽  
Engineering Properties ◽  
Asphalt Pavements ◽  
Future Research ◽  
Tire Rubber ◽  
Durability Assessment ◽  
Overall Performance ◽  
Pavement Construction ◽  
Critical Overview

The use of recycled tire rubber in asphalt pavements to improve the overall performance, economy, and sustainability of pavements has gained considerable attention over the last few decades. Several studies have indicated that recycled tire rubber can reduce the permanent deformation of flexible pavements and enhance its resistance to rutting, reduce pavement construction and maintenance costs, and improve the resistance to fatigue damage. This paper provides a systematic and critical overview of the research on and practice of using recycled tire rubber in asphalt pavements in terms of engineering properties, performance, and durability assessment. This critical analysis of the state-of-the-art should enhance the understanding of using recycled tire rubber in asphalt pavements, define pertinent recommendations, identify knowledge gaps, and highlight the need for concerted future research.

scholarly journals Study on Laboratory Experimental Pavement Performances of SEAM Modified Asphalt Mixture

2019 ◽  
Vol 136 ◽  
pp. 03010
Author(s):  
Ma Qingna ◽  
Zhao Zhiqin ◽  
Xu Qian ◽  
Sun Feng
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Water Stability ◽  
High Temperature Stability ◽  
Modified Asphalt ◽  
The Road ◽  
Road Performance ◽  
Property Index

Adding sulphur dilution asphalt modifier SEAM to asphalt mixture is not only a modifier of asphalt mixture, but also an additive of asphalt mixture. When the modifier is added into the asphalt mixture, the road performance of the asphalt mixture can be improved. This paper studies SEAM modified asphalt mixture the Marshall property index, temperature stability, Water stability and fatigue feature in the Laboratory. On the based of the result of the experiment and analysis, SEAM can improve the high temperature stability, Water stability and fatigue feature. But the low temperature stability can’t improve.

Effect of Crumb Rubber Modifier on Pavement Performance of Wearing Course Asphalt Mixture

2010 ◽  
Vol 168-170 ◽  
pp. 1145-1148 ◽  
Author(s):  
Xin Qiu ◽  
Lan Yun Chen ◽  
Liang Xue
Keyword(s):  
Low Temperature ◽  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Moisture Damage ◽  
Crumb Rubber ◽  
Total Weight ◽  
Pavement Performance ◽  
Wet Process ◽  
Low Temperature Cracking ◽  
Improved Performance

The paper investigates the effects of different concentrations of crumb rubber (CR) on the pavement performance of the conventional penetration-grade 80/100 bitumen and the dense-graded wearing course asphalt mixture (AC16). A wet process and 0.6mm size CR were used and the control variables included three types of CR of concentrations 5%,10% and 15% by total weight of binder. The evaluations were twofold. Firstly, a comparison of the basic and rheological properties of those modified and unmodified binders was conducted. Secondly, a comparison of the resistance to moisture damage, low temperature cracking and permanent deformation of the AC16 and CR modified AC16 was performed. The results show that all the CR modified binders and mixtures are found to have improved performance as evaluated by a series of laboratory tests. In addition, among three CR concentrations, AC16 modified with 10%CR by total weight of binder exhibits the most satisfactory performance properties with respect to the resistance to moisture damage, permanent deformation and low temperature cracking.

Experimental Research on the Performances of Warm Mix Recycled Asphalt Mixture in Road Application

2011 ◽  
Vol 243-249 ◽  
pp. 4207-4212
Author(s):  
Ji Shu Sun ◽  
Chun Feng Yang ◽  
Zhao Xia Chen ◽  
Hui Ran Pi
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Experimental Research ◽  
Hot Mix Asphalt ◽  
Asphalt Mixture ◽  
Water Stability ◽  
Recycled Asphalt ◽  
Pavement Structures

The effect of sasobit’s quantity exerted on the asphalt viscosity was researched firstly in this paper, and the mixing temperature of warm mix recycled Asphalt mixture was determined. Then, the technical performances of warm mix recycled asphalt mixture on high temperature, low temperature and water stability were studied through systematic experiments. And compared the technical indexes with that of hot mix asphalt. The results showed that sasobit could reduce asphalt viscosity significantly, so it could lower the mixing and compaction temperatures of the recycled asphalt mixture. The technical indexes of warm mix recycled asphalt mixture conform to the current specifications, so it can be used in many pavement structures.

scholarly journals Preparation and Properties of an Active Cooling Antirutting Asphalt Mixture

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Shuan Li ◽  
Xianghang Li ◽  
Xinquan Xu ◽  
Xiaoping Ji ◽  
Dawei Lv ◽  
...  
Keyword(s):  
Low Temperature ◽  
Asphalt Mixture ◽  
Water Stability ◽  
High Temperature Stability ◽  
Plate Temperature ◽  
Cooling Performance ◽  
Modified Asphalt ◽  
Active Cooling ◽  
Temperature Performance ◽  
Low Temperature Performance

To reduce the temperature of asphalt pavements in summer and improve their high-temperature stability, tourmaline anion powder (TAP) was used as a modifier to prepare modified asphalt, which actively cools the pavement. The effects of different TAP contents on the high- and low-temperature performance of modified asphalt and its pavement cooling performance were studied based on the dynamic shear rheometer, low-temperature bending beam rheometer, and indoor rutting plate temperature difference tests; subsequently, the optimum TAP content was determined. Modified asphalt was used to prepare an active cooling antirutting asphalt mixture, and its pavement cooling performance was verified via outdoor lighting tests. High- and low-temperature dynamic modulus and low-temperature semicircular splitting tests were used to evaluate the high- and low-temperature performance; further, freeze-thaw splitting and immersion Marshall tests were performed to evaluate the water stability of the active cooling antirutting asphalt mixture. The results denote that TAP is useful for improving the rutting factor of asphalt. When the TAP content is 16% of the asphalt material, the maximum cooling value of the surface in laboratory tests becomes 5.9°C. When compared with an ordinary asphalt mixture, the dynamic stability of the active cooling antirutting asphalt mixture at medium and high temperatures increased by 18%–22%. The fracture energy can be increased by 12% at low temperatures. The maximum cooling value of the surfaces in outdoor tests is 7.2°C, and the water stability slightly decreases; however, it still satisfies the specification requirements.

Mix Design and Performance Research on Asphalt Mixture of SUP-20 with Lucobit

2015 ◽  
Vol 713-715 ◽  
pp. 2765-2768
Author(s):  
Ye Mao Zhang ◽  
Kun Wang
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Asphalt Mixture ◽  
Performance Comparison ◽  
Mix Design ◽  
Water Stability ◽  
Stability Performance ◽  
Temperature Performance ◽  
And Performance ◽  
Performance Research

To research the grading applicability of Lucobit modifier and make it adapt to China's basic national conditions very well, the gradations of SUP-20 was selected to research mix design and pavement performance in the text. First, the mix design of SUP-20 without Lucobit is researched. Then the performance of SUP-20 is verified including the high temperature, low temperature and water stability performance of common asphalt mixture. At last the performance comparison between SUP-20 asphalt mixture with 7% Lucobit and without is carried out. Results show that the performance of SUP-20 asphalt mixture with 7% Lucobit and without can all meet the requirement. Compared with the performance of SUP-20 asphalt mixture without Lucobit, the low temperature and water stability performance with Lucobit have a little improvement and the high temperature performance improves a lot. So Lucobit modifier can greatly improve the high temperature performance of SUP-20 asphalt mixture.

Effect of Aging on the Low-Temperature Properties of Asphalt Mixture

2013 ◽  
Vol 438-439 ◽  
pp. 383-386
Author(s):  
Ning Li Li ◽  
Xin Po Zhao ◽  
Cai Li Zhang ◽  
Qing Yi Xiao ◽  
Hu Hui Li
Keyword(s):  
Low Temperature ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Flexural Test ◽  
Short Term ◽  
Modified Asphalt ◽  
Aging Test ◽  
Cracking Performance

This article studies the low-temperature anti-cracking properties of plain asphalt mixtures and rubber-modified asphalt mixtures at different aging condition. Laboratory flexural test was conducted on the beam specimens of plain asphalt mixtures and rubber-modified asphalt mixtures. Experiment results indicate that rubber-modified asphalt mixtures have superior low-temperature anti-cracking performance than that of plain asphalt mixtures. Compared with the short term oven aging test, the long term oven aging test has more significant effect on the low-temperature anti-cracking of the mixture. In order to better represent the low-temperature anti-cracking of in-service aging asphalt pavement, the long term oven aging test should be used to appraise the low-temperature anti-cracking of asphalt pavements in china.

Study on Pavement Performance of High Volume Reclaiming Asphalt Mixture

2014 ◽  
Vol 1081 ◽  
pp. 260-264
Author(s):  
Wei Rong Huang ◽  
Ming Tan
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Crack Resistance ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
High Volume ◽  
Pavement Performance ◽  
Water Stability ◽  
High Temperature Stability ◽  
Temperature Crack

It was based on laboratory test, in order to study on the high temperature stability, water stability and low-temperature crack resistance of AC-16 reclaiming asphalt mixture with different proportion of old material, this test takes into account 9 kinds of these asphalt mixture. The results show, with the old material blending ratio increased, the high temperature stability of asphalt mixture changed for the better, water stability and low-temperature crack resistance deteriorated. The pavement performance meet the requirements of secondary road or less, when old material content is within 70%. The research results provide reference for the application of reclaiming asphalt mixture.

scholarly journals Road Performance and Application Analysis of Ultra-Thin Asphalt Coating Mixture with High Elastic Modification

2021 ◽  
Vol 276 ◽  
pp. 02034
Author(s):  
Jinfen Wei ◽  
Xundong Yang ◽  
Qiwei Zhou ◽  
Huoming Wang ◽  
Yunfei Fang
Keyword(s):  
Low Temperature ◽  
Asphalt Mixture ◽  
Fatigue Properties ◽  
Water Stability ◽  
Modified Asphalt ◽  
High Elasticity ◽  
Road Performance ◽  
Sbs Modified Asphalt ◽  
Temperature Water ◽  
Temperature Crack

A kind of composite modified asphalt with high elasticity was prepared by SBS and high elasticity agent, and the asphalt mixture with easy compactness was applied. The high temperature, low temperature, water stability and fatigue properties of the mixture were evaluated by laboratory tests. The results show that the optimum content of high elasticity agent is about 6% for SBS modified asphalt. The pavement performance of the high-elasticity modified asphalt compacting mixture was improved to a certain extent. Compared with SBS modified asphalt SMA-13, the dynamic stability was increased by 13.5%. The water stability, low temperature crack resistance and fatigue resistance increased by 10.4%, 59.3% and 173%.

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