Open AccessFracture Performance of a Large-Stone Asphalt Mixture Based on a Monotonic Tensile Overlay Test
Author(s) -
Jianhui Wei,
Tao Fu,
Junlin Liang
Publication year - 2021
Publication title -
advances in civil engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.379
H-Index - 25
eISSN - 1687-8094
pISSN - 1687-8086
DOI - 10.1155/2021/6622024
Subject(s) - materials science , asphalt , fracture (geology) , cracking , overlay , composite material , ultimate tensile strength , tensile testing , fracture mechanics , structural engineering , geotechnical engineering , geology , engineering , computer science , programming language
A large-stone asphalt mixture (LSAM) is usually used as the base course of asphalt pavement to prevent the generation of cracks. However, there are few studies on the fracture performance and crack resistance of LSAMs. Under the monotonic tensile loading mode, the overlay test (OT) was explored to investigate the influence of different test factors on the cracking resistance and fracture performance. The study results indicated that a change in temperature and aging results in a variation in fractal dimension, the fracture energy of crack growth is higher than that of crack initiation, and fracture energy is increased to a certain extent by decreased temperature, an increased loading rate or increased aging. Finally, a constitutive model is established based on the disturbed state concept (DSC), and the proposed constitutive model is consistent with the test results.