Application of asphalt mixture shear strength to evaluate pavement rutting with accelerated loading facility (ALF)

2013 ◽  
Vol 41 ◽  
pp. 1-8 ◽  
Author(s):  
Xiaoping Ji ◽  
Nanxiang Zheng ◽  
Yueqin Hou ◽  
Sisheng Niu
Keyword(s):  
Shear Strength ◽  
Asphalt Mixture

scholarly journals Prediction Models of Shear Parameters and Dynamic Creep Instability for Asphalt Mixture under Different High Temperatures

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2542
Author(s):  
Junxiu Lv ◽  
Xiaoyuan Zhang
Keyword(s):  
Shear Stress ◽  
Shear Strength ◽  
Stress Level ◽  
Prediction Models ◽  
Asphalt Mixture ◽  
Confining Pressure ◽  
Shear Strength Parameters ◽  
Dynamic Creep ◽  
Shear Stress Level ◽  
Creep Instability

This study mainly investigates the prediction models of shear parameters and dynamic creep instability for asphalt mixture under different high temperatures to reveal the instability mechanism of the rutting for asphalt pavement. Cohesive force c and internal friction angle φ in the shear strength parameters for asphalt mixture were obtained by the triaxial compressive strength test. Then, through analyzing the influence of different temperatures on parameters c and φ, the prediction models of shear strength parameters related to temperature were developed. Meanwhile, the corresponding forecast model related to confining pressure and shear strength parameters was obtained by simplifying the calculation method of shear stress level on the failure surface under cyclic loading. Thus, the relationship of shear stress level with temperature was established. Furthermore, the cyclic time FN of dynamic creep instability at 60 °C was obtained by the triaxial dynamic creep test, and the effects of confining pressure and shear stress level were considered. Results showed that FN decreases exponentially with the increase in stress levels under the same confining pressure and increases with the increase in confining pressure. The ratio between shear stress level and corresponding shear strength under the same confining pressure was introduced; thus, the relationship curve of FN with shear stress level can eliminate the effect of different confining pressures. The instability prediction model of FN for asphalt mixture was established using exponential model fitting analysis, and the rationality of the model was verified. Finally, the change rule of the parameters in the instability prediction model was investigated by further changing the temperature, and the instability forecast model in the range of high temperature for the same gradation mixture was established by the interpolation calculation.

Research on Road Performance of Desulfurized Rubber Asphalt and Mixture

2014 ◽  
Vol 525 ◽  
pp. 546-551 ◽  
Author(s):  
Chun Wei Wang ◽  
Fei Wang ◽  
Wen Gang Zhang
Keyword(s):  
Shear Strength ◽  
Rubber Particle ◽  
Asphalt Mixture ◽  
Performance Testing ◽  
High Viscosity ◽  
Cohesive Strength ◽  
The Road ◽  
Swelling Mechanism ◽  
Road Performance ◽  
Asphalt Mortar

In order to discuss the road performance of desulfurized rubber asphalt and mixture, Swelling mechanism of desulfurized rubber asphalt was studied first, and then performance testing of KLMY90#, normal rubber asphalt and desulfurized rubber asphalt were taken, after that, penetration, shear strength and cohesive strength of desulfurized rubber asphalt mortar were test, road performance of desulfurized rubber asphalt mixture were test at last. The results of the study show that, there is no Rubber particle core, but lots of chemical reaction in desulfurized rubber asphalt; the performance of desulfurized rubber asphalt is better than normal rubber asphalt without high viscosity, easy isolation and poor high temperature storage stability; shear strength and cohesive strength of desulfurized rubber asphalt mortar is better; and desulfurized rubber asphalt mixture have good road performance.

The Research on the Index of High Temperature Performance of Asphalt Mixture in Airfield

2013 ◽  
Vol 723 ◽  
pp. 1076-1083 ◽  
Author(s):  
Ping Li ◽  
Lie Ping Wang ◽  
Wei Lei ◽  
Bao Lin Xiong
Keyword(s):  
Shear Strength ◽  
High Temperature ◽  
Dynamic Stability ◽  
Asphalt Mixture ◽  
Evaluation Index ◽  
Design Parameters ◽  
Advantages And Disadvantages ◽  
Temperature Performance ◽  
Performance Evaluation Index ◽  
Wheel Tracking

In order to solve current airfield asphalt road surface high temperature performance evaluation index defective problem, we apply the humbug wheel tracking test, general rutting test and uniaxial penetration test ,and use different evaluation index to carry on the analysis. Test results show that shear strength index and rutting test index on the contrary, regression dynamic stability can't distinguish between SMA - 13 and AC - 20 high temperature performance advantages and disadvantages, creep slope and dynamic stability index consistent; At the same time, the use of bailey method design parameters and asphalt cement parameters on its verification found that bailey method can further explain mixture grading high temperature performance advantages and disadvantages, ratio of filler to bitumen and dynamic stability, shear strength, creep slope has a good correlation, and asphalt film thickness and its correlation is poor. So suggest using dynamic stability and humbug wheel tracking creep slope, rutting depth combination evaluation mixture at high temperature performance advantages and disadvantages.

Powder Oil Ratio on Stability of Asphalt Mixture in High Temperature Effect

2013 ◽  
Vol 700 ◽  
pp. 175-178
Author(s):  
Guang Pu Hao
Keyword(s):  
Shear Strength ◽  
High Temperature ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Electron Microscope Observation ◽  
Dynamic Shear ◽  
High Temperature Stability ◽  
Asphalt Mortar ◽  
Scanning Electron ◽  
High Temperature Effect

According to the different powder oil ratio of asphalt mixture rutting experiment at high temperature, rotary experimenting machine, for different powder oil ratio dynamic shear experiment of asphalt mortar, using the scanning electron microscope observation on the microstructure of asphalt mortar, powder oil ratio on mixture high temperature stability influence. The experiment results show that: powder oil ratio is larger, stronger anti rut ability, and powder oil ratio is affected by the asphalt shear strength to influence high temperature stability of asphalt mixture, and put forward the best powder oil ratio in the range of 0.18~1.2.

Estimation of shear modulus of asphalt mixture based on the shear strength of the aggregate interface

2020 ◽  
Vol 248 ◽  
pp. 118695
Author(s):  
Xu Cai ◽  
Li Chen ◽  
Ruida Zhang ◽  
Wenke Huang ◽  
Kuanghuai Wu ◽  
...  
Keyword(s):  
Shear Strength ◽  
Shear Modulus ◽  
Asphalt Mixture

Research on Shear Strength for Asphalt Mixture by the Uniaxle Penetration Test Method

2011 ◽  
Vol 97-98 ◽  
pp. 220-225 ◽  
Author(s):  
Yang Cai
Keyword(s):  
Shear Strength ◽  
High Temperature ◽  
Linear Correlation ◽  
Shear Test ◽  
Asphalt Mixture ◽  
Test Method ◽  
Penetration Test ◽  
Triaxial Shear Test ◽  
Different Temperatures ◽  
Penetration Tests

With uniaxle penetration test method and Triaxial Shear method test, the shear strengths for asphalt mixture were analyzed. It turns out that the result of triaxial shear test is a little conservative than that of uniaxle penetration test. Then reasonable structure factor for shear strength should be considered by uniaxle penetration test. Uniaxle penetration tests at different temperatures revealed there were a linear correlation between shear strength and temperature.The asphalt was not the main fator of shear strength at high temperature.

scholarly journals Analysis of a Methodology for Torsional Test under Normal Stress and Shear Performance for Asphalt Mixtures

2019 ◽  
Vol 2019 ◽  
pp. 1-14
Author(s):  
Jun Xie ◽  
Yiqun Zhan ◽  
Yifan Wang
Keyword(s):  
Shear Strength ◽  
Normal Stress ◽  
Shear Test ◽  
Stress Condition ◽  
Asphalt Mixture ◽  
Friction Angle ◽  
Asphalt Mixtures ◽  
Test Method ◽  
Shear Performance ◽  
Torsional Test

Insufficient shear performance in an asphalt mixture is a primary reason for rutting deformation and pavement surface longitudinal cracking. Thus, it is important to choose a suitable shear test method to evaluate shear performance in an asphalt mixture. Current testing methods mainly evaluate the bonding strength between asphalt layers, and the current shear test method for an asphalt mixture is disadvantaged by high equipment cost and complicated procedures. Our study proposes a torsional test method under normal stress condition, and evaluation was done for four types of asphalt mixture under different temperature conditions. Through the mechanical analysis, the calculation formulas for shear strength and shear parameters (cohesion and internal friction angle) for the torsional test under a normal stress condition were obtained. Testing results were also obtained for shear strength, shear modulus, and cohesion and internal friction angle of the asphalt mixtures. Experimental testing indicated that the method was able to provide repeatable results for the shear resistance of asphalt mixtures at different temperatures and also reflected the difference in shear performance of the various asphalt mixtures and the influence of temperature on shear performance. The failure mode of the specimen was the appearance of an oblique crack of about 45° from the vertical axis after the specimen was destroyed, which accorded with shear failure characteristics. A shear fatigue model was obtained considering different shear stress levels. The torsional test method under normal stress formed a compression-shear action on the specimen by applying torque and normal stress and was used to evaluate the shear performance of the asphalt mixtures.

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