沥青混凝土低温直接拉伸蠕变研究

On the Low-Temperature Creep Characteristic of Asphalt Concrete in Direct Tension

本文根据改性和未改性两种沥青混凝土试件在低温下的直接拉伸蠕变试验结果,分析了两种独立的蠕变模型:衰减蠕变和非衰减蠕变.以条件持久强度和非衰减蠕变曲线的稳定蠕变段的解析特征为基础,建立了蠕变的计算方程.依据该方程介绍了一种计算温度应力的方法.

Two creep models-attenuate creep and non-attenuate creep are analyzed in this paper based on the test result of low-temperature characteristic of standard and modified asphalt concrete in direct tension. An equation is proposed for calculating the creep of asphalt concrete in terms of the conditional long term strength and analytical characteristic of the stable section in the non-attenuate creep curve and accordingly a method of calculating-temperature stress is derived.