Study on modulus characteristics of semi‐flexible pavement

Authors

CAI Yubin, Yancheng Highway Administration Office, Yancheng, Jiangsu 224005, ChinaFollow
GONG Minghui, Sobute New Materials Co., Ltd., Nanjing, Jiangsu 211103, China; 3. State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Research Institute of Building Science Co., Ltd, Nanjing, Jiangsu 210008, China
XIONG Zijia, Sobute New Materials Co., Ltd., Nanjing, Jiangsu 211103, China; 3. State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Research Institute of Building Science Co., Ltd, Nanjing, Jiangsu 210008, China
DENG Cheng, Sobute New Materials Co., Ltd., Nanjing, Jiangsu 211103, China; 3. State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Research Institute of Building Science Co., Ltd, Nanjing, Jiangsu 210008, China
PENG Gang, Sobute New Materials Co., Ltd., Nanjing, Jiangsu 211103, China; 3. State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Research Institute of Building Science Co., Ltd, Nanjing, Jiangsu 210008, China
ZHANG Lihua, Sobute New Materials Co., Ltd., Nanjing, Jiangsu 211103, China; 3. State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Research Institute of Building Science Co., Ltd, Nanjing, Jiangsu 210008, China
HONG Jinxiang, Sobute New Materials Co., Ltd., Nanjing, Jiangsu 211103, China; 3. State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Research Institute of Building Science Co., Ltd, Nanjing, Jiangsu 210008, China

Abstract

Semi-flexible pavement has the advantages of good bearing capacity and strong shear deformation resistance and is an effective means to solve the rutting disease of intersections, bus stops, and other sections. However, due to the difference in mechanical properties, semi-flexible pavement can not completely refer to the design method of cement concrete pavement or asphalt concrete pavement, and one of the important tasks of establishing a design system suitable for semi-flexible pavement is to analyze the material modulus characteristics of pavement. In this paper, the dynamic modulus, indirect tensile stiffness modulus, and rebound modulus of laboratory forming and coring specimens were tested based on laboratory tests, and the pavement deflection data was collected by drop hammer bending meter. The test results show that the dynamic modulus of semi-flexible pavement material and asphalt mixture is similar in the range of medium temperature. Under high temperature and low frequency conditions, the dynamic modulus of the two materials is significantly different. By comparing rebound modulus and deflection data, it is found that the modulus of semi-flexible pavement is about twice that of asphalt pavement, while the bending of the former is only 1/2 that of the latter. The results show that the influence of the test method and loading mode on the modulus of the two materials is significantly different, and the pavement design should further select the modulus parameters under different test conditions according to the two typical failure modes of the pavement.

Publication Date

3-17-2023

DOI

10.14048/j.issn.1671-2579.2023.01.008

First Page

52

Last Page

56

Submission Date

March 2025

Recommended Citation

Yubin, CAI; Minghui, GONG; Zijia, XIONG; Cheng, DENG; Gang, PENG; Lihua, ZHANG; and Jinxiang, HONG (2023) "Study on modulus characteristics of semi‐flexible pavement," Journal of China & Foreign Highway: Vol. 43: Iss. 1, Article 52.
DOI: 10.14048/j.issn.1671-2579.2023.01.008
Available at: https://zwgl1980.csust.edu.cn/journal/vol43/iss1/52