Experimental study on the diagonal shear of asphalt mixture at micro‐surfaces

Authors

HUANG Weirong, School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. National & Local Joint Engineering Research Center of Transportation and Civil Engineering Materials, Chongqing Jiaotong University, Chongqing 400074, ChinaFollow
YANG Yuzhu, School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. National & Local Joint Engineering Research Center of Transportation and Civil Engineering Materials, Chongqing Jiaotong University, Chongqing 400074, ChinaFollow
WANG Cheng, National & Local Joint Engineering Research Center of Transportation and Civil Engineering Materials, Chongqing Jiaotong University, Chongqing 400074, China
HUANG Feng, National & Local Joint Engineering Research Center of Transportation and Civil Engineering Materials, Chongqing Jiaotong University, Chongqing 400074, China
YANG Bo, Zhixiang Paving Technology Engineering Co., Ltd., Chongqing 400067, China

Abstract

A new 45° diagonal shear test was conducted to study the shear properties of the SBR-modified emulsified asphalt mixture at the micro-surface under the influence of different loading rates, different interface states, and different temperatures and water. The shear failure forms at the micro-surface at different temperatures were explained, and the effects of viscous layer oil, soil, and water on the shear strength at the micro-surface were analyzed. The results show that a faster loading rate at the micro-surface indicates higher shear strength. The shear failure mode of micro-surface at normal temperature is mainly an interlayer shear failure, while that at high temperature is a self-shear failure. When the surface of the original pavement is rough, the spread of viscous layer oil has little contribution to the increase in interlayer shear strength, and the mud water will reduce the interlayer shear strength at the micro-surface. Water immersion will damage the interlayer shear strength at the micro-surface, and spraying viscous layer oil can effectively improve the water damage resistance of the interface between the micro-surface and the original pavement.

Publication Date

3-17-2023

DOI

10.14048/j.issn.1671-2579.2023.01.031

First Page

178

Last Page

182

Submission Date

March 2025

Recommended Citation

Weirong, HUANG; Yuzhu, YANG; Cheng, WANG; Feng, HUANG; and Bo, YANG (2023) "Experimental study on the diagonal shear of asphalt mixture at micro‐surfaces," Journal of China & Foreign Highway: Vol. 43: Iss. 1, Article 31.
DOI: 10.14048/j.issn.1671-2579.2023.01.031
Available at: https://zwgl1980.csust.edu.cn/journal/vol43/iss1/31