摘要
采用MTS 810对未切缝及预切缝两种小梁试件进行低温3点弯曲试验,并利用临界应变能密度及材料的临界应力强度因子评价纤维长度及纤维力学性能对低温抗裂性能的影响.结果表明,掺加纤维能有效阻滞裂纹的进一步发展,提高沥青混合料的低温抗裂能力,且随纤维力学强度的增大及长度的适当增长,纤维的增强效果进一步改善.
Three point bending tests are performed using unnotched and notched specimens to study the crack propagation resistance with critical strain energy density and stress intensity factor at low temperature. Fiber with various length and strength are added to asphalt mixture to assess their effects on cracking resistance, It is shown through the results that adding fiber to asphalt mixture can effectively improve its performance at low temperature and enhance cracking resistance, and that, the enhance degree is greater with higher strength and longer fiber.
出处
《昆明理工大学学报（理工版）》
2007年第6期55-60,共6页
Journal of Kunming University of Science and Technology(Natural Science Edition)
关键词
沥青混合料
沥青路面
低温开裂
asphalt mixture
asphalt pavement
low- temperature cracking
作者简介
王巨创（1966-），男，高级工程师．主要研究方向：通桥．E—mail：JL．F@163．com
