目标孔隙率对天然浮石混凝土冻融损伤影响规律研究  

Study on the effect of target porosity on freeze-thaw damage of natural pumice concrete

作　　者：白岩 尹新生[2] 张克 郑训臻[1] BAI Yan;YIN Xinsheng;ZHANG Ke;ZHENG Xunzhen(College of Civil Engineering,Changchun Institute of Architecture,Changchun 130021,China;College of Civil Engineering,Jilin Architecture University,Changchun 130118,China;Taiyuan Architects&Consulting Engineers,Taiyuan 030002,China)

机构地区：[1]长春建筑学院土木工程学院,吉林长春130021 [2]吉林建筑大学土木工程学院,吉林长春130118 [3]太原市建筑设计院,山西太原030002

出　　处：《混凝土》2021年第1期9-12,16,共5页Concrete

基　　金：国家自然科学基金项目(51178205)。

摘　　要：将橡胶颗粒加入到天然浮石混凝土中,看作混凝土中的孔隙,体积作为目标孔隙率。测试在冻融循环条件下,不同目标孔隙率对天然浮石混凝土质量损失率、动弹性模量和抗压强度的影响,研究混凝土冻融损伤规律。根据影响规律,分别对质量损失率、动弹性模量和抗压强度进行拟合。结果表明:天然浮石混凝土目标孔隙率与各试验指标之间有良好的相关性,进而建立了基于天然浮石混凝土目标孔隙率的经验计算式,为研究天然浮石混凝土冻融损伤规律提供了一定的理论参考。The rubber particles are added to the natural pumice concrete as the pores in the concrete and the volume as the target porosity.Under the condition of freeze-thaw cycle,the effects of different target porosity on the mass loss rate,dynamic elastic modulus and compressive strength of natural pumice concrete were tested,and the freeze-thaw damage law of concrete was studied.According to the influence law,the mass loss rate,dynamic elastic modulus and compressive strength are fitted respectively.The results show that there is a good correlation between the target porosity of natural pumice concrete and the test indexes,and then the empirical formula based on the target porosity of natural pumice concrete is established.It provides a certain theoretical reference for the study of freeze-thaw damage law of natural pumice concrete.

关 键 词：天然浮石混凝土 橡胶颗粒 目标孔隙率 冻融损伤 

分 类 号：TU528.2[建筑科学—建筑技术科学]