聚丙烯纤维增强水泥稳定碎石基层材料的抗冲刷性能  

Anti-erosion Property of Polypropylene Fiber Reinforced Cement-Stabilized Macadam Base Material

作　　者：何小兵[1] 杨庆国[1] 何国基 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074 [2]广州东新高速公路有限公司,广东广州511442

出　　处：《建筑材料学报》2010年第2期263-267,276,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(10672196);重庆市自然科学基金资助项目(2008BB6344)

摘　　要：应用材料试验系统(MTS)研究了聚丙烯纤维增强水泥稳定碎石基层材料抗冲刷性能随聚丙烯纤维掺量、聚丙烯纤维长度、水泥掺量、养护龄期以及冲刷时间变化的规律,并从材料结构组成、强度理论以及断裂损伤理论三方面分析了材料的抗冲刷机理.结果表明:在10 Hz正弦交变集中荷载作用下,养护14 d聚丙烯纤维增强水泥稳定碎石基层材料20 min时的冲刷速率可用来评价其抗冲刷性能;合理配比的聚丙烯纤维增强水泥稳定碎石基层材料的抗冲刷性能较普通水泥稳定碎石基层材料提高30%以上.In order to improve the anti-erosion performance of cement-stabilized macadam base material,polypropylene fiber reinforced cement-stabilized macadam base material was made to investigate the effects of fiber content, fiber length,cement content,curing age and eroding time on its anti-erosion property by MTS（material test system）.The anti-erosion improvement mechanism of polypropylene fiber was analyzed from material composition,strength theory and fracture and damage theory.The test results show that the eroding rate in 20 min of 14 d polypropylene fiber reinforced cement-stabilized macadam base material at 10 Hz alternating load can be used to evaluate its anti-erosion performance.Reasonable proportion design of polypropylene fiber reinforced cement-stabilized macadam base material reduced the eroding（amount） more than 30% compared with ordinary cement-stabilized macadam base material.

关 键 词：半刚性基层 聚丙烯纤维增强水泥稳定碎石 抗冲刷性能 

分 类 号：TU528.0[建筑科学—建筑技术科学] U416.0[交通运输工程—道路与铁道工程]