寒冷地区沥青路面老化材料的低温性能评价∗

摘要

沥青路面的低温开裂是道路破坏的主要形式之一，在寒冷地区普遍存在。沥青和沥青混合料的低温性能是反映沥青路面抗低温开裂能力的主要指标。本文依托于长平高速公路实体工程，通过现场调查路面的实际开裂情况，以及室内低温劈裂蠕变实验和弯曲梁流变仪实验，评价沥青路面老化材料的低温性能。同时分析路面实际开裂情况与路面老化材料低温性能间的相关性，验证沥青及沥青混合料低温性能评价标准的有效性。%The main form of highway engineering damages is the low-temperature cracking of asphalt pavement, which ubiquity of damage in cold regions.Low-temperature performance of binder and asphalt mixture is a re-flection of anti-cracking ability of asphalt pavements.This paper was supported by Changping highway con-struction engineering,by investigation the actual cracking status of asphalt pavement,by the indirect tensile test in low temperature condition,and by the bending beam rheological test in laboratory,can have verification of low temperature performance of asphalt pavement aging material.Also we have an analysis of actual cracking status of asphalt pavement with low temperature performance of pavement aging materials,and the result has proven the evaluation criterion of AASHTO highly effective for verification low temperature performance of binder and asphalt pavements.