冻融后聚丙烯纤维细石混凝土力学性能研究  

Study on mechanical properties of polypropylene fiber reinforced fine aggregate concrete under action of frezze-thaw

作　　者：赵军[1] 李光辉 张营 

机构地区：[1]郑州大学土木工程学院,河南郑州450002 [2]河南省交通科学技术研究院有限公司,河南郑州450006

出　　处：《混凝土》2010年第1期61-63,共3页Concrete

基　　金：河南省杰出青年科学基金(0612002300);河南省教育厅自然科学计划(2009A560015)

摘　　要：通过聚丙烯纤维细石混凝土的冻融循环试验,研究了聚丙烯纤维掺量、冻融循环次数、细石混凝土强度等级对冻融循环作用下聚丙烯纤维细石混凝土基本力学性能的影响,探讨了聚丙烯纤维对细石混凝土抗冻性能的增强机理。试验结果表明:聚丙烯纤维细石混凝土的抗压强度、劈拉强度和抗折强度随冻融次数的增加而降低;聚丙烯纤维的加入及细石混凝土强度等级的提高是改善聚丙烯纤维细石混凝土抗冻性能的有效途径。Through the experiment on freeze-thaw for concrete specimens, the influence of the grade of concrete strength was studied, the con- tent of polypropylene fiber and the freeze-thaw circulation times on the basal mechanics performance of polypropylene fiber reinforced fine aggre- gate concrete after freeze-thaw were tested.Furthermore, the reinforced mechanism of the polypropylene fiber reinforced fine aggregate concrete under the action of freeze-thaw was discussed.The study results showed that as the number of freeze-thaw circulation increased, the basal mechan- ics performance of polypropylene fiber reinforced fine aggregate concrete declined.The additional of polypropylene fiber and the enhancement of the grade of fine aggregate concrete strength were the effective ways to improve the freeze-resisting property of polypropylene fiber reinforced fine aggregate concrete.

关 键 词：冻融 细石混凝土 聚丙烯纤维 力学性能 

分 类 号：TU528.572[建筑科学—建筑技术科学]