聚酯纤维对水泥稳定碎石基层的性能影响研究  

Study on properties of polyester fiber cement stabilized macadam base

作　　者：丘晓坚 QIU Xiao-jian(Xiamen Luyuan Architectural Design Institute Co.,Ltd.,Fujian Xiamen 361009 China)

机构地区：[1]厦门陆原建筑设计院有限公司

出　　处：《山东交通科技》2019年第4期68-70,77,共4页

摘　　要：针对水泥稳定碎石基层易发生收缩变形,从而形成裂缝,影响路面的整体性能这一病害问题。为了能有效的改善水稳层的各项性能指标,降低其收缩变形,通过向集料中添加不同掺配比例的的聚酯纤维,对混合料依次进行无侧限抗压强度实验、劈裂强度实验以及干缩应变实验,分析聚酯纤维与龄期对水泥稳定碎石基层性能的影响及作用机理。实验结果表明:聚酯纤维能显著提高水泥稳定碎石基层的无侧限抗压强度与劈裂强度,且皆为早期前期强度增速较快,后期趋于平缓;水稳层前期的干缩应变随聚酯纤维掺量的增加而减少,后期趋于平缓。Aiming at the problem that the cement stabilized macadam base layer is prone to shrinkage deformation,which forms cracks and affects the overall performance of the road surface.In order to effectively improve the performance indexes of the water-stable layer and reduce its shrinkage deformation,the unconfined compressive strength test and splitting of the mixture are sequentially carried out by adding polyester fibers of different blending ratios to the aggregate.Strength test and dry shrinkage strain test were carried out to analyze the influence of polyester fiber and age on the performance of cement stabilized macadam base and its mechanism.The experimental results show that the polyester fiber can significantly improve the unconfined compressive strength and splitting strength of the cement stabilized macadam base,and both of them are faster in the early stage and tend to be flat in the later stage;the shrinkage in the early stage of the water stable layer The strain decreases with the increase of the polyester fiber content,and tends to be gentle at the later stage.

关 键 词：水泥稳定碎石基层 聚酯纤维 无侧限抗压强度 劈裂强度 干缩应变 

分 类 号：U416[交通运输工程—道路与铁道工程]