摘要
针对掺加不同材质、不同长度纤维材料增强的沥青混合料应用MTS 810材料试验机进行未切缝及预切缝三点低温弯曲试验,通过临界应变能密度及应力强度因子方法评价低温性能探讨了纤维增强机理。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。
Fibers with various lengths and strength were added to asphalt mixture to assess their effect on crack resistance, and three-point bending tests were performed on unnotched and notched specimens with MTS 810 to study the crack propagation resistance with critical strain energy density and stress intensity factor at low temperature. The results show that while adding fiber to asphalt mixture can effectively improve its performance at low temperature and enhance the crack resistance, the enhancement could be even better following the increasing of mechanical strength of the fiber and its length.
出处
《筑路机械与施工机械化》
北大核心
2016年第7期45-49,共5页
Road Machinery & Construction Mechanization
关键词
沥青混合料
纤维
临界应变能密度
应力强度因子
asphalt mixture
fiber
critical strain energy density
stress intensity factor
