聚丙烯纤维半刚性基层材料弯曲韧性试验研究  

Experimental Research on Flexural Toughness of Semi-rigid Base Mixed into Polypropylene Fiber

作　　者：马银华[1] 张广 易志坚[1] 仲玉善 韩八晓 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074 [2]内蒙古省际通道建设管理办公室,内蒙古呼和浩特010020

出　　处：《重庆交通大学学报（自然科学版）》2007年第4期57-59,77,共4页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：内蒙古交通科技项目(NJ-2005-23)资助

摘　　要：通过4点弯曲试验,得到了低掺量聚丙烯纤维半刚性基层与不掺纤维的普通基层材料的荷载-挠度曲线,并据此分析了各类基层材料的弯曲强度、变形性能;按照日本砼协会(JCI)标准方法和美国材料与试验协会(ASTMC1018—97)标准方法,分别计算得到了聚丙烯纤维半刚性基层材料与普通基层材料的韧性指数.韧性评价结果表明,低掺量聚丙烯纤维半刚性基层材料具有较强的持荷变形能力,其韧性和抗裂性能显著高于普通基层材料.By the four-point flexural test, the load-deflection curves of semi-rigid base mixed into low polypropylene fiber and plain base were got, and the flexural intensity and deformation performance in virtue of them were analyzed. According to the standard measures of JC1 and ASTM C1018-97, the toughness index was calculated separately. Toughness valuation shows that the semi-rigid base mixed into low polypropylene fiber is characterized by sustained load deformation performance and distinct advantage over plain base in toughness and anti-crack performance.

关 键 词：聚丙烯纤维 半刚性基层 水泥稳定砂砾基层 水泥稳定碎石基层 韧性指数 抗裂性能 

分 类 号：U416.214[交通运输工程—道路与铁道工程]