聚酯纤维和聚丙烯腈纤维沥青混凝土水稳定性对比试验.pdfVIP

学兔兔 2011年第7期 混凝土与水泥制 品 2011 N07 7月 CHINA CONCRETE AND CEMENT PR0DUCTS July 聚酯纤维和聚丙烯腈纤维沥青混凝土 水稳定性对比试验 常传立 ，宋建学 (1．河南省第五建筑安装工程(集团)有限公司，郑州450001；2郑州大学土木工程学院，450001) 摘 要：马歇尔残留稳定度试验和冻融劈裂试验结果表明，加入纤维对沥青混合料的水稳性有明显改善作用， 马歇尔残留稳定度从88％提高到92％以上。不同类型的纤维，提高程度略有不同，聚酯纤维稍逊于聚丙烯腈纤维，而 聚丙烯腈纤维又弱于其与聚酯纤维混合配方。冻融循环试验结果表明，未掺纤维的沥青混凝土强度损失最大，聚丙 烯腈纤维与聚酯纤维混合掺入的沥青混凝土强度损失最小。 关键词：公路工程；纤维沥青混凝土；马歇尔残留稳定度；劈裂强度；聚酯纤维；聚丙烯腈纤维 Abstract：Abstract：By the Marshall residual stability experiment and freezing and thawing split test，the experimental results indicate that the water stability of asphalt admixture can be obviously impmved by adding fiber,and Marshall residual stability is increased from 88％ to over 92％．Difierent types of fiber have different improving effects on Marsha11 residual stability，for example，the one with polyester fiber is less than the one with polyacrylonitrile fiber，and the one with polyacrylonitrile fiber is less than the one with the mixing proportion by polyacrylonitrile fiber and polyester fiber．Freeze- thaw cycle experimental resuhs show that the strength loss of asphalt concrete without adding fiber is the largest，and strength loss of asphalt concrete with adding polyaerylonitrile fiber and polyester fiber is the least． Key words：Hi曲way engineering；Fiber reinforced asphalt concrete；Marshall residual stability；Cleavage strength； Polyester fiber；Polyaerylonitrile fiber 中图分类号：TU377．9 文献标识码：A 文章编号：1000—4637(2011)07-44-03 0 前言 标准，根据规程[31对其各项指标进行试验，所检项目 近年来，人们