Micromechanical Simulation of Influence Factors of Indirect Tensile Test of Asphalt Mixture

2017 ◽  
Vol 46 (2) ◽  
pp. 20160352 ◽  
Author(s):  
W. Liu ◽  
Y. Gao ◽  
L. Li
Keyword(s):  
Tensile Test ◽  
Asphalt Mixture ◽  
Influence Factors ◽  
Indirect Tensile Test ◽  
Indirect Tensile

scholarly journals Study on Mesoscopic Mechanics of Recycled Asphalt Mixture in the Indirect Tensile Test

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Yanping Sheng ◽  
Haichuan Jia ◽  
Hongli Lv ◽  
Huaxin Chen ◽  
Xiaorui Zhao ◽  
...  
Keyword(s):  
Tensile Test ◽  
Mechanical Response ◽  
Mechanical Test ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Simulation Method ◽  
Recycled Asphalt ◽  
Macroscopic Appearance ◽  
Indirect Tensile Test ◽  
Indirect Tensile

Reclaimed asphalt pavement (RAP) mainly contains asphalt binder and aggregates, and the RAP materials used in paving roads could save virgin materials. This paper studied the following: asphalt mixture with different RAP material contents was prepared; then the indirect tensile test was carried out, and the mesoscopic model of the recycled asphalt mixture was reconstructed digitally. Discrete element method (DEM) of indirect tensile test was carried out to analyze the mechanical properties of recycled asphalt mixture in mesoscopic perspective. The results showed that there were some gaps between the simulation result of the digital specimen model and the test value of the recycled asphalt mixture, but the velocity vector and the law of force chain development of the recycled asphalt mixture could be explained in mesoscopic perspective. It proved that the virtual simulation test of the mechanical test was effective. The damage process of recycled asphalt mixture was analyzed in mesoscopic perspective, and the unification of mechanical response and macroscopic appearance was completed. Meanwhile, the simulation method of mesoscopic mechanics was an effective supplement to traditional tests, and guided tests method theoretically.

Indirect Tensile Test (IDT) to Determine Asphalt Mixture Performance Indicators during Quality Control Testing in New Jersey

2018 ◽  
Vol 2672 (28) ◽  
pp. 394-403 ◽  
Author(s):  
Thomas Bennert ◽  
Edwin Haas ◽  
Edward Wass
Keyword(s):  
Quality Control ◽  
Tensile Test ◽  
Asphalt Mixture ◽  
Performance Testing ◽  
Fatigue Cracking ◽  
Test Methods ◽  
Mixture Design ◽  
Indirect Tensile Test ◽  
Quality Control Testing ◽  
Indirect Tensile

In recent years, there has been a growing interest in incorporating performance testing during the mixture design and quality control testing of asphalt mixtures. The move toward utilizing performance related specifications (PRS) and balanced mixture design concepts have pushed the need for asphalt mixture performance testing to the forefront. Numerous researchers have proposed a variety of laboratory tests that have showed promise at predicting asphalt mixture performance, yet most of these test methods are never adopted due to a number of issues often cited by the asphalt industry: (1) equipment cost; (2) equipment/test method complexity; and (3) time/labor effort required. The research presented here summarizes the effort to evaluate the indirect tensile test (IDT) as a potential performance indicator for hot-mix asphalt that can be easily utilized during quality control testing at an asphalt plant. Utilizing the same test equipment and basic procedure, both high-temperature rutting and intermediate-temperature fatigue cracking can be evaluated in a timely manner. Comparison testing to more standardized and accepted rutting and fatigue cracking test methods have shown excellent agreement, indicating that the suite of IDT tests have potential for adoption within a quality control testing program. Examples of criteria are given utilizing the New Jersey Department of Transportation’s (NJDOT) PRS.

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