A STUDY ON AGING EVALUATION METHOD OF ASPHALT MIXTURE BASED ON CYCLIC TORSIONAL SHEAR TEST

2020 ◽  
Vol 76 (2) ◽  
pp. I_227-I_235
Author(s):  
Shinya YOKOTA ◽  
Satoru SHIBUYA ◽  
Osamu KAMADA ◽  
Yoshio HISARI ◽  
Yasumoto AOKI
Keyword(s):  
Shear Test ◽  
Evaluation Method ◽  
Asphalt Mixture ◽  
Torsional Shear

scholarly journals BASIC RESEARCH ON EVALUATION METHOD OF ASPHALT MIXTURES USING CYCLIC TORSIONAL SHEAR TEST

2019 ◽  
Vol 75 (2) ◽  
pp. I_185-I_193
Author(s):  
Shinya YOKOTA ◽  
Tara Nidhi LOHANI ◽  
Satoru SHIBUYA ◽  
Osamu KAMADA ◽  
Yoshio HISARI
Keyword(s):  
Shear Test ◽  
Evaluation Method ◽  
Basic Research ◽  
Asphalt Mixtures ◽  
Research On Evaluation ◽  
Torsional Shear

Investigation into Shear Coefficient for Circle Shear Test Method of Asphalt Mixture

2012 ◽  
Vol 446-449 ◽  
pp. 2590-2594
Author(s):  
Tuo Huang ◽  
Guo Ping Qian ◽  
Jian Long Zheng
Keyword(s):  
Shear Test ◽  
Asphalt Mixture ◽  
Test Method ◽  
Shear Coefficient

Comparison of Test Methods for High-Temperature Performance of Asphalt Mixtures

2013 ◽  
Vol 361-363 ◽  
pp. 1629-1634 ◽  
Author(s):  
Guo Xiong Wu ◽  
Xiao Ke Zhang ◽  
Rui Lin Wang
Keyword(s):  
Elastic Modulus ◽  
High Temperature ◽  
Shear Test ◽  
Asphalt Mixture ◽  
Test Methods ◽  
Asphalt Mixtures ◽  
Penetration Test ◽  
Shear Elastic Modulus ◽  
Temperature Performance ◽  
Slant Shear

Through a comparative study of high-temperature asphalt mixture performance by three methods: the standard rutting test, uniaxial penetration test on cylindrical specimens, and slant shear test, this paper displays that the shear elastic modulus gained by both cylindrical uniaxial penetration test and slant shear test can reflect well the properties of shear deformation of asphalt mixture under high temperature. However, there are certain limitations in these test methods.

scholarly journals Numerical Simulation Virtual Test of Torsion Shear for Asphalt Mixture

2019 ◽  
Vol 2019 ◽  
pp. 1-21
Author(s):  
Jun Xie ◽  
Yougang Yang
Keyword(s):  
Numerical Simulation ◽  
Shear Failure ◽  
Failure Process ◽  
Asphalt Mixture ◽  
Test Method ◽  
Reconstruction Method ◽  
Virtual Test ◽  
Torsional Shear ◽  
Shear Process ◽  
Air Void

In order to analyze the torsional shear process of asphalt mixtures in a microscopic view, the numerical simulation of a torsional shear test of an asphalt mixture was carried out by discrete element method. Based on the defects of existing algorithms, the method of random reconstruction of the existing 3D model of the asphalt mixture was improved, and a new reconstruction method was proposed. A 3D numerical model of the asphalt mixture contained irregular-shaped coarse aggregate, mineral gradation, and asphalt mortar; furthermore, the particle algorithm established the air void distribution. Then, the numerical simulation of the asphalt mixture’s torsional shear was completed; in addition, the stress, displacement, and contact of the specimens at each stage were analyzed. The results showed that the stress and displacement in different stages changed greatly with the loading, i.e., the crack generated from a weak point on the surface and then spread to the ends with an oblique angle of about 45°. At the same time, the shear failure process of the asphalt mixture was studied. The virtual test method could accomplish the implementation of the numerical simulation of torsional shear; it also provided a good research method for analysis of the asphalt mixture’s shear failure process.

Evaluation on High Temperature Performance of Asphalt Mixture by Triaxial Dynamic Compression Test

2011 ◽  
Vol 97-98 ◽  
pp. 130-137
Author(s):  
Chuan Hai Wu
Keyword(s):  
High Temperature ◽  
Compression Test ◽  
Evaluation Method ◽  
Dynamic Compression ◽  
Testing Machine ◽  
Asphalt Mixture ◽  
Objective Evaluation ◽  
Road Pavement ◽  
Temperature Performance ◽  
Accumulated Strain

This paper aims to explore the reasonability of an evaluation method on high temperature performance of asphalt mixture through a series of experiements. The first step of these experiements is to formulate specimens of different high-temperature performances by Gyratory Testing Machine which simulates the on-road pavement to the most extent , and then adopt triaxial dynamic compression test to compare and analyze high-temperature performances of these specimens. By introducing concepts and indicators such as validity, reliability, discrimination, this paper evaluates comprehensively the discrimination results of various compression test parameters on high-temperature performance of asphalt mixture. It concludes that the evaluation effect of compression stiffness modulus is best, followed by the slope of logarithmic creep curve and accumulated strain area, and the evaluation effect of final compression strain is comparatively poor. That provides an objective evaluation method on high temperature performances of asphalt mixtures.

Experimental Study on Foamed Asphalt Warm Mix Technology

2014 ◽  
Vol 919-921 ◽  
pp. 1110-1114
Author(s):  
Ying Biao Wu ◽  
Jin Jin Shi ◽  
Chen Fang Yang ◽  
Sheng Xia Song
Keyword(s):  
Evaluation Method ◽  
Asphalt Mixture ◽  
The Road ◽  
Foamed Asphalt ◽  
Outdoor Experiment ◽  
Road Performance ◽  
Cold Recycling ◽  
Lower Temperature ◽  
Specification Requirement ◽  
Better Than

Usually, foamed asphalt as cold recycling mixture binder, study on foamed asphalt warm mix technology was limited in China. Aimed at the asphalt foaming characteristic, the paper put forward the best asphalt foaming condition and carried out indoor and outdoor experiment to study the road performance of warm mixed asphalt mixture. The paper proposed the maturation curing time concept and its evaluation method. Results indicated that the warm mixed asphalt mixtures road performance can meet the HMA specification requirement in a lower temperature of construction, and low-temperature crack resistance was better than the tradition hot mix asphalt mixture so the warm mix foamed mixture has a remarkable economic and society benefit.

scholarly journals Durability Evaluation Study for Crumb Rubber–Asphalt Pavement

2019 ◽  
Vol 9 (16) ◽  
pp. 3434 ◽  
Author(s):  
Xuancang Wang ◽  
Zhenyang Fan ◽  
Li Li ◽  
Hongyao Wang ◽  
Minghui Huang
Keyword(s):  
Evaluation System ◽  
Evaluation Method ◽  
Asphalt Pavement ◽  
Water Immersion ◽  
Asphalt Mixture ◽  
Objective Evaluation ◽  
Evaluation Study ◽  
Crumb Rubber ◽  
Working Environment ◽  
Traffic Load

In this study, the failure mechanism of crumb rubber–asphalt pavement was analyzed under the combined effects of low temperature, water, and traffic load. The investigation was carried out based on the mechanical and deformational properties of crumb rubber–asphalt mixture and the typical environmental and load conditions such pavement is typically exposed to. A method was proposed for objective evaluation of the interfacial adhesion between rubber crumbs and asphalt through consideration of the effects of the characteristics of the materials and the working environment. The main evaluation method used herein included the indirect tensile strength test under freeze–thaw–boiling cycle, and the Cántabro abrasion test under water-immersion was adopted as an auxiliary method. The evaluation system has the advantages of simple implementation, realistic simulation of the actual working state of the mixture, and reliable results. Moreover, it is a durability evaluation method that can be specifically applied to asphalt mixtures with some special aggregates or stone mastic asphalt (SMA) mixtures.

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