摘要
鉴于现有冷补沥青混合料易松散的特性,通过进行不同纤维掺量下冷补沥青混合料的开裂能试验、冻融劈裂试验和飞散试验,分析纤维掺量对冷补沥青混合料路用性能的影响。试验结果表明:纤维的掺入有助于改善混合料水稳定性,但纤维掺量过多会导致混合料拌合困难,容易产生离析,影响混合料之间的粘结性能,反而降低混合料水稳定性;纤维的掺入对冷补沥青混合料的抗松散性是有利的,且纤维掺量适当增加有助于改善其结构整体性;混合料低温抗裂性随纤维掺量的增加有所降低,初步分析是由于养生不充分引起的。
As cold patch asphalt mixture can be loosened easily, through fracture energy test, freeze-thaw splitting test and dispersion test on cold patch asphalt mixture with different fiber contents, the influence of different fiber contents on the road performance of cold patch asphalt mixture is analyzed. The test results show that （1） fiber is helpful to improve the moisture stability of cold patch asphalt mixture, but too much fiber will make it difficult to mix and easy to segregate, which could influence the bond behavior of mixture and reduce the moisture stability of cold patch asphalt mixture; （2） fiber is favorable to the loosening resistance property of cold patch asphalt mixture, appropriately increasing the content of fiber is helpful to improve the integrity stability; （3） the low-temperature crack resistance property decreases as the content of fiber increasing, and the preliminary analysis shows that it is resulted from insufficient curing time.
出处
《公路交通科技》
CAS
CSCD
北大核心
2013年第9期13-17,共5页
Journal of Highway and Transportation Research and Development
基金
交通运输部西部交通建设科技项目(2011318801670)
关键词
道路工程
沥青混合料
路用性能
纤维掺量
冷补
road engineering
asphalt mixture
road performance
fiber content
cold patch
