摘要
为研究沥青混合料紫外老化过程中的水稳定性能,采用实验室模拟紫外环境和自然大气暴露两种老化方式,改进浸水马歇尔试验、冻融循环劈裂试验和浸水车辙试验,实现了沥青路面水损害环境模拟,对不同老化程度的混合料,采用马歇尔残留稳定度、残留劈裂强度比和车辙深度评价其水稳定性能。试验结果表明,随着紫外老化时间延长沥青混合料水稳定性能衰减。试验方法结果表明实验室模拟紫外老化与自然大气老化之间具有一定相关性,采用冻融循环劈裂试验和浸水车辙试验评价紫外老化混合料的水稳定性能更加合理。
In order to study the water stability of asphalt mixture with ultraviolet（ UV） radiation,several indoor accelerated simulation of ultraviolet aging tests together with natural exposure aging tests were carried out. Original simulation of water damage of asphalt pavement tests were improved,such as long term immersing Marshall test,frozen-thaw cycle test and wheel tracking test immersed in water.Experimental results show that water stabilities and mechanical behaviors of mixture have been altered by UV aging. With aging time prolonged,the retained stability,splitting intensity ratio declines and the amount of rutting increases. It shows attenuation on water stability of asphalt concrete. The results show the correlation between indoor accelerated simulation of UV aging tests and natural exposure aging tests,and the water stability evaluating by frozen-thaw cycle test and wheel tracking test immersed in water was more reasonable.
出处
《公路工程》
北大核心
2014年第5期160-164,169,共6页
Highway Engineering
关键词
紫外老化
沥青混合料
水稳定性
残留稳定度
劈裂强度比
车辙深度
asphalt mixture
UV aging
water stability
retained stability
splitting intensity ratio
the amount of rutting
