The Triaxial Test Research of Asphalt-Rubber Mixture

2012 ◽  
Vol 598 ◽  
pp. 603-607 ◽  
Author(s):  
Lan Wang ◽  
Xiao Hui Meng ◽  
Li Qing Pan ◽  
Ji Quan Zhang
Keyword(s):  
Triaxial Test ◽  
Asphalt Mixture ◽  
Confining Pressure ◽  
The United States ◽  
Test System ◽  
Rubber Mixture ◽  
Factors Affecting ◽  
Modified Asphalt ◽  
Asphalt Rubber ◽  
Shear Performance

In order to evaluate the shear performance of the rubber powder modified asphalt mixture, we do the triaxial test of Asphalt-Rubber mixture at specified temperature, which use the United States GCTS STX-100 two-way vibration triaxial test system. Through the result of the test, we analysis the factors affecting the shear resistance of asphalt mixture such as modification agent,confining pressure, gradation type and also get the mechanical properties of the asphalt mixture in the triaxial stress state.

Laboratory Assessment of Workability of Asphalt Rubber Hot Mixes Using Warm Mix Technology

2012 ◽  
Vol 193-194 ◽  
pp. 452-457 ◽  
Author(s):  
Meng Yun Huang ◽  
Jing Hui Liu ◽  
Xi Zhang ◽  
Dan Ni Li
Keyword(s):  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Crumb Rubber ◽  
Laboratory Assessment ◽  
Asphalt Mixes ◽  
Modified Asphalt ◽  
The Road ◽  
Asphalt Rubber ◽  
Synergy Effects ◽  
Save Energy

Using the waste crumb rubber modified asphalt to pave the road surface could reduce cost and save energy. However，in order to obtain adequate workability, the mixing temperature and compaction temperature of rubberized asphalt binder and its mixture is much higher than those of conventional asphalt mixtures. Warm Mix Asphalt (WMA) is the name given to certain technologies that reduce the production and placement temperatures of asphalt mixes. One of the main benefits advertised is the increased workability at conventional and lower compaction temperatures with the WMA addition. This paper evaluates whether there are any synergy effects of using warm mix technologies and Asphalt Rubber(AR) hot mixes. This paper summarizes a lab research to evaluate the workability of Asphalt Rubber hot mixes containing warm mix technologies. Both asphalt binder and asphalt mixture were evaluated and compared. The research suggests that combining WMA technology with Asphalt Rubber mixtures is a win-win.

Research on Designing Optimum Asphalt Aggregate Ratio of Asphalt Mixture by Direct Shear Method

2014 ◽  
Vol 505-506 ◽  
pp. 215-218
Author(s):  
Hong Mei Li ◽  
Wen Fang Liu
Keyword(s):  
Permanent Deformation ◽  
Maximum Shear Stress ◽  
Asphalt Mixture ◽  
Confining Pressure ◽  
Asphalt Mixtures ◽  
Test Machine ◽  
Direct Shear ◽  
The Road ◽  
Good Ability ◽  
Shear Performance

The author has done the shear experiment of asphalt mixtures at different asphalt aggregate ratio and different confining pressure using the direct shear test machine, then determined the optimum asphalt aggregate ratio according to the maximum shear stress. The asphalt mixture under optimum asphalt aggregate ratio has better shear performance by this method, and this method can better simulate the road surface actual stressful condition, the asphalt mixture has a good ability of anti-permanent deformation and fatigue.

The Performance and Mechanism of Waste Tire Crumb Rubber Modified Asphalt

2011 ◽  
Vol 99-100 ◽  
pp. 1365-1369
Author(s):  
Yan Chun Li ◽  
Pan Zhang ◽  
Rui Lv
Keyword(s):  
Performance Improvement ◽  
Crumb Rubber ◽  
Pavement Performance ◽  
Test Results ◽  
Rubber Mixture ◽  
Tire Rubber ◽  
Modified Asphalt ◽  
Waste Tire ◽  
Asphalt Rubber ◽  
Waste Tire Rubber

Crumb rubber modified asphalt can not only improve asphalt pavement performance, but also can achieve the waste re-use, further study on the crumb rubber modified asphalt is very important. This paper mainly discusses the action mechanism of waste tire rubber modified asphalt, and analysis the performance improvement of the asphalt when it is mixed with the waste tire rubber. By analyzing the test results of asphalt’s conventional, we find out that mixed the waste tire rubber in asphalt is the resulting in the improvement of asphalt’s performance. Lastly, it discusses waste tire rubber modified asphalt advantages and the prospects of development. Overall, popularize and application the asphalt-rubber mixture is valuable.

scholarly journals Studying Shear Performance of Flax Fiber-Reinforced Clay by Triaxial Test

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Qiang Ma ◽  
Yicong Yang ◽  
Henglin Xiao ◽  
Wenwen Xing
Keyword(s):  
Shear Strength ◽  
Triaxial Test ◽  
Confining Pressure ◽  
Fiber Content ◽  
Flax Fiber ◽  
Triaxial Tests ◽  
Fiber Reinforced ◽  
Shear Performance ◽  
Strain Relationship ◽  
Reinforced Clay

Laboratory triaxial tests were carried out to investigate the reinforcement mechanism, to study the characteristics of flax fiber-reinforced clay, and to discuss the effect on stress-strain relationship and shear strength parameters of flax fiber-reinforced clay in different flax fiber content and different confining pressure. Respectively, the ratio of fiber content to clay by weight is 0.2%, 0.4%, 0.6%, 0.8%, and 1.0%, and the confining pressure is 100 kPa, 200 kPa, and 300 kPa in triaxial test. The test results show that, the shear strength of flax fiber-reinforced clay is greater than that of pure clay. Compared with the pure clay, the shear strength of flax fiber-reinforced clay increased as the cohesion and friction increased; while the increase of the friction is relatively small, the increase of cohesion is large. The shear strength firstly increased and then reduced with the increase of flax fiber content. When the fiber content was 0.8%, the shear strength reached a peak value, and the shear strength reduced with the further increase of fiber content.

Performance Evaluation of Large Stone Porous Asphalt-Rubber Mixture

2010 ◽  
Vol 150-151 ◽  
pp. 1184-1190 ◽  
Author(s):  
Wei Dong Cao ◽  
Zhan Yong Yao ◽  
Qing Sen Shang ◽  
Ying Yong Li ◽  
Yong Shun Yang
Keyword(s):  
Low Temperature ◽  
Asphalt Mixture ◽  
Rigid Base ◽  
Test Results ◽  
Rubber Mixture ◽  
Porous Asphalt ◽  
Large Stone ◽  
Asphalt Rubber ◽  
Temperature Performance ◽  
As Stress

Performance of Large Stone Porous Asphalt- Rubber Mixture（LSPARM）was studied in laboratory. Hamburg wheel tracking test, low temperature indirect tensile test and bending fatigue test were conducted to evaluate the high temperature performance of resistance to rutting, moisture susceptibility, low temperature performance of resistance to cracking and anti-fatigue performance of LSPARM and the test results were compared with the conventional large stone porous asphalt mixture using one polymer modified asphalt (control mixture). The test results indicate that LSPARM has better performance than the control mixture and it could be used as stress absorbing layers of semi-rigid base asphalt pavement.

scholarly journals Constructing better roads with asphalt rubber

2015 ◽  
Vol 4 (2) ◽  
pp. 23-52 ◽  
Author(s):  
Jorge C. Pais ◽  
Liseane P. Thives ◽  
Paulo A. A. Pereirâ ◽  
Glicério Trichês
Keyword(s):  
Mechanical Properties ◽  
Laboratory Tests ◽  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Good Resistance ◽  
Rubber Mixture ◽  
Wet Process ◽  
Asphalt Rubber ◽  
Prolonged Fatigue

Abstract Brazilians mixtures containing asphalt rubber were evaluated by mechanical laboratory tests. A conventional mixture with asphalt CAP-50/70 was produced as a mixture control. With the aim of compare the Brazilians mixtures performance, a Portuguese asphalt rubber mixture was tested as well. The testing set involved the determination of the mechanical properties, fatigue and permanent deformation, of asphalt rubber produced by wet process through two different systems: continuous blend and terminal blend. The asphalt rubber morphology was evaluated in order to determine the compatibility of the systems. The asphalt rubber mixtures exhibit good resistance to permanent deformation and prolonged fatigue life in relation to mixture control. Therefore it is concluded that the application of asphalt rubber alters the characteristics of asphalt mixture in a very beneficial way.

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