粗集料粒径和级配对混凝土抗折强度的影响  

The influence of coarse aggregate limiting grain size and gradation on the discrete spectrum of concrete rupture strength

作　　者：李跃东 

机构地区：[1]河南省平顶山市县乡公路管理处

出　　处：《山西建筑》2007年第25期16-18,共3页Shanxi Architecture

基　　金：河南省科技攻关项目(项目编号:0624450002)

摘　　要：利用正交设计的方法,研究了粗集料最大粒径和级配、水灰比、砂率对卵石混凝土路面抗折强度离散性的影响,结果表明,砂率对卵石混凝土路面抗折强度的离散性影响不显著,而水灰比、卵石最大粒径和级配对卵石混凝土路面抗折强度的离散性影响十分显著。　Based on the orthogonal experiment,these factors on the coarse aggregate limiting grain size and gradation,cement ratio and sand percentage which effect the discrete spectrum of cobble concrete rupture strength are investigated.The analysis results show that the influence of sand percentage on the discrete spectrum of cobble concrete rupture strength is not remarkable,but cement ratio,the coarse aggregate limiting grain size and gradation is remarkable.

关 键 词：卵石混凝土 变异系数 离散性 正交设计 

分 类 号：TU528.1[建筑科学—建筑技术科学]