A unified evaluation method for intermediate and low temperature fracture performance of asphalt concrete

被引：0
作者：
Song W. [1 ]
Xu Z. [1 ]
Wu H. [1 ]
Xu F. [1 ]
Zhan Y. [1 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2021年 / 52卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Equivalent stress intensity factor; Fracture energy; Fracture toughness; Low-intermediate temperature; Reclaimed asphalt pavement;
D O I：
10.11817/j.issn.1672-7207.2021.07.024
中图分类号：
学科分类号：
摘要：
To evaluate the fracture toughness of asphalt concrete at intermediate and low temperatures by a unified indicator, an equivalent stress intensity factor(KIC*) based on energy approach was used to evaluate the fracture resistance of asphalt concrete at intermediate temperatures. Semi-circular bending(SCB) tests were conducted on specimens incorporated with three different contents of reclaimed asphalt pavement(RAP) (0, 25% and 50%). The parameters of stress intensity factor(KIC) and fracture energy(GF) were measured at -10 ℃, and J integral and KIC* were measured at 25 ℃. The results show that the stress intensity factor of specimens with 25% RAP obtains the maximum value at -10 ℃, whereas, the fracture energy declines with the increase of RAP mass fraction. At 25 ℃, J integrals increase remarkably along with the RAP mass fraction inclusion, which indicates that RAP can enhance the fracture performance at the intermediate temperature. The equivalent stress intensity factor(KIC*) also improves along with the increase of RAP mass fraction, which demonstrates that the equivalent stress intensity factor criterion can be used to evaluate the low-intermediate temperature fracture toughness of asphalt concrete. © 2021, Central South University Press. All right reserved.
引用
收藏
页码：2386 / 2393
页数：7
相关论文
共 22 条
  • [1] TAN Yiqiu, Asphalt and asphalt mixture, pp. 1-48, (2007)
  • [2] WANG Songgen, HUANG Xiaoming, Asphalt pavement maintenance and reconstruction, pp. 88-102, (2012)
  • [3] LI Sheng, CHEN Shangwu, LIU Zhaohui, Et al., Damage behavior and mechanism of asphalt layer of rigid base asphalt pavement, Journal of Central South University(Science and Technology), 47, 3, pp. 1065-1070, (2016)
  • [4] SONG Weimin, HUANG Baoshan, SHU Xiang, Influence of warm-mix asphalt technology and rejuvenator on performance of asphalt mixtures containing 50% reclaimed asphalt pavement, Journal of Cleaner Production, 192, pp. 191-198, (2018)
  • [5] WU Hao, YU Jia, SONG Weimin, Et al., A critical state-of-the-art review of durability and functionality of open-graded friction course mixtures, Construction and Building Materials, 237, (2020)
  • [6] YE Chao, CHEN Huaxin, Study on road performance of nano SiO<sub>2</sub> and nano TiO<sub>2</sub> modified asphalt, New Building Materials, 36, 6, pp. 82-84, (2009)
  • [7] JAHROMI S G, KHODAII A., Effects of nanoclay on rheological properties of bitumen binder, Construction and Building Materials, 23, 8, pp. 2894-2904, (2009)
  • [8] PIRMOHAMMAD S, MAJD SHOKORLOU Y, AMANI B., Influence of natural fibers (kenaf and goat wool) on mixed mode I/II fracture strength of asphalt mixtures, Construction and Building Materials, 239, (2020)
  • [9] PIRMOHAMMAD S, AYATOLLAHI M R., Asphalt concrete resistance against fracture at low temperatures under different modes of loading, Cold Regions Science and Technology, 110, pp. 149-159, (2015)
  • [10] LU Song, XIAO Hong, ZHANG Zhihai, Research on stress and cracking characteristics of high-speed railway asphalt concrete under complex loads, Journal of Central South University(Science and Technology), 51, 10, pp. 2893-2905, (2020)
123