细集料对混杂纤维混凝土性能的影响  

Influence of fine aggregate on properties of hybrid fiber reinforced concrete

作　　者：李永鹏[1] 嵇绍华[2] 何锐[2] 陈拴发[1] 

机构地区：[1]长安大学交通铺面材料教育部工程研究中心,陕西西安710064 [2]长安大学公路学院,陕西西安710064

出　　处：《混凝土》2013年第6期40-42,51,共4页Concrete

基　　金："十二五"国家科技支撑计划项目(2011BAE27B04)

摘　　要：通过对混杂纤维混凝土进行工作性试验、力学试验和弯曲韧性测试,得到了细集料对混杂纤维混凝土性能的影响效果。试验结果表明,细集料的细度模数减小会降低混杂纤维混凝土的坍落度和泌水率,对强度的影响不大,但用低细度模数的细集料配制的混杂纤维混凝土的荷载-挠度曲线具备明显的变形硬化特征,极限挠度和弯曲韧性指数显著增大。Properties of hybrid fiber reinforced concrete was analyzed by workability test, mechanics test and fiexural toughness test.The results showed that slump and bleeding rate of hybrid fiber concrete reduced and mechanical strength changed little with reduction of fine aggregate fineness modulus.But load-deflection curves of hybrid fiber concrete prepared with a low fineness modulus of fine aggregate had significant deformation hardening characteristics,limitd deflections and bending toughness index increased significantly.

关 键 词：细集料 混杂纤维混凝土 工作性 力学性能 弯曲韧性 

分 类 号：TU528.041[建筑科学—建筑技术科学]