路面混凝土冻融破坏评价指标参数敏感性分析  

Sensitivity Analysis of Evaluation Indicator Parameters on Freeze-thaw Damage of Pavement Concrete

作　　者：柳明亮[1] 石振武[1] 

机构地区：[1]东北林业大学土木工程学院,黑龙江哈尔滨150040

出　　处：《施工技术》2015年第11期82-84,91,共4页Construction Technology

基　　金：黑龙江省交通运输厅科技项目(20110715)

摘　　要：评价混凝土冻融破坏的指标参数较多,为研究这些评价参数对抗冻性的敏感程度,测试了不同含气量和粉煤灰混凝土的抗冻性能,着重从含气量、气泡间距系数、相对动弹性模量、相对耐久性指数、抗折强度损失率、剥落量6个方面分析混凝土冻融破坏。结果表明,含气量、气泡间距系数均是评价混凝土抗冻性的敏感指标,水冻环境和盐冻环境下分别增加抗折强度损失率和剥落量作为评价混凝土抗冻性的敏感指标。Many indicator parameters are used to evaluate freeze-thaw damage of concrete,in order to study sensitivity of evaluation parameters on freeze resistance,this paper tests freeze resistance of concrete including different air content and fly ash,6 parameters used to evaluate freeze-thaw damage of concrete are emphasized,such as air content,air void spacing coefficient,relative dynamic elastic modulus,relative durability index,flexural strength loss rate,scaled mass. The results show that air content and air void spacing coefficient are all sensitivity indexes on evaluating freeze resistance of concrete,adding flexural strength loss rate index under pure water environment,and adding scaled mass under salt solution environment.

关 键 词：公路工程 路面 冻融破坏 含气量 抗折强度 

分 类 号：TU414[建筑科学—岩土工程]