橡胶沥青水老化试验研究

发布时间：2018-03-01 14:06

本文关键词： 橡胶沥青水老化水量高温稳定疲劳开裂低温性能　出处：《四川大学学报(工程科学版)》2014年01期 　论文类型：期刊论文

【摘要】：为研究水老化作用方式及水量对橡胶沥青老化性能的影响,以橡胶沥青和TOR橡胶沥青2种材料为例,通过改变水作用阶段和用水量试验研究不同水老化方式对橡胶沥青老化后软化点、黏度、疲劳因子、蠕变劲度、蠕变速率的影响。试验结果表明:选择在压力老化前三分之一时间(400 min)进行加水压力老化试验,后三分之二时间进行无水压力老化试验的水老化作用方式最具可行性;对比无水压力老化试验和加水压力老化试验可知,水的存在促进了橡胶沥青的热氧老化;随水量的增加,TOR橡胶沥青的高温稳定性能降低,抗疲劳开裂能力和低温性能降低,沥青老化加剧。
[Abstract]:In order to study the effect of water aging mode and amount of water on the aging performance of rubber asphalt, two kinds of materials, rubber asphalt and TOR rubber asphalt, were taken as examples. The softening point, viscosity, fatigue factor, creep stiffness of rubber asphalt after aging with different water aging methods were studied by changing the water action stage and water consumption test. The effect of creep rate on the creep rate. The results show that the water aging mode is the most feasible when the water pressure aging test is carried out at 1/3 minutes before the pressure aging and the anhydrous pressure aging test is carried out at the later 2/3 hours. Compared with water pressure aging test and water pressure aging test, the existence of water promoted the thermal oxygen aging of rubber asphalt, and the high temperature stability, fatigue cracking resistance and low temperature performance of TOR rubber asphalt decreased with the increase of water content. The aging of asphalt is aggravated.
【作者单位】：扬州大学建筑科学与工程学院;
【分类号】：U414

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