混杂纤维对护坦混凝土性能的影响及增强机理研究  

Study on influence and reinforcement mechanism of hybrid fibers on performance of apron concrete

作　　者：李俊 何代宇 亓星 陈剑 赵珊德 王培懿 吴超 李小波 LI Jun;HE Daiyu;QI Xing;CHEN Jian;ZHAO Shande;WANG Peiyi;WU Chao;LI Xiaobo(School of Civil Engineering,Sichuan University of Science&Engineering,Zigong 643000,China;Kangding City Project Reserve Center,Tibetan Autonomous Prefecture of Garzê626000,China;Tongjiang County Emergency Management Monitoring Center,Bazhong 636700,China)

机构地区：[1]四川轻化工大学土木工程学院,四川自贡643000 [2]康定市项目储备中心,四川甘孜藏族自治州626000 [3]四川省通江县应急管理监测中心,四川巴中636700

出　　处：《混凝土与水泥制品》2025年第4期60-64,共5页China Concrete and Cement Products

基　　金：四川省科技厅科普培训项目(24KJPX0076)。

摘　　要：研究了聚丙烯纤维的体积掺量(0、0.05%、0.10%、0.15%、0.20%)、钢纤维的类型(端钩型、铣销型)和体积掺量(0、0.6%、0.9%、1.2%、1.5%)对泥石流护坦混凝土抗压、抗冻和抗冲磨性能的影响,分析了端钩型钢纤维和聚丙烯纤维的混杂效果,并进行了微观机理分析。结果表明:与单掺聚丙烯纤维相比,单掺钢纤维对护坦混凝土抗压强度的提高效果较好,且端钩型钢纤维的提高效果更好,其最佳掺量为1.2%;相对单掺,混掺适量端钩型钢纤维和聚丙烯纤维能有效提高护坦混凝土的抗压、抗冻和抗冲磨性能,推荐两者的混掺比例为1.2%和0.15%。The effects of the volume content(0,0.05%,0.10%,0.15%,0.20%)of polypropylene fiber,the type(end hook type,milling pin type)and the volume content(0,0.6%,0.9%,1.2%,1.5%)of steel fiber on the compressive,frost resistance,and abrasion resistance of apron concrete for debris flow were investigated.The hybrid effect of end hooked steel fiber and polypropylene fiber was analyzed,and the micro mechanism was analyzed.The results show that compared with the individual addition of polypropylene fiber,the individual addition of steel fiber has a better effect on improving the compressive strength of apron concrete,especially the improvement effect of end hooked steel fiber,with an optimal content of 1.2%.Compared to individual addition,mixing an appropriate content of end hooked steel fiber and polypropylene fiber can effectively improve the compressive,frost resistance,and abrasion resistance of apron concrete.The recommended mixing ratio of end hooked steel fiber and polypropylene fiber is 1.2%and 0.15%,respectively.

关 键 词：泥石流拦砂坝 护坦混凝土 混杂纤维 力学性能 抗冻性能 抗冲磨性能 

分 类 号：TU528.572[建筑科学—建筑技术科学]