基于目标孔隙率的天然浮石混凝土强度分布规律研究  

Study on strength distribution of natural pumice concrete based on target porosity

作　　者：白岩 尹新生[2] BAI Yan;YIN Xinsheng(College of Civil Engineering,Changchun Institute of Architecture,Changchun 130021,China;College of Civil Engineering,Jilin Architecture University,Changchun 130118,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

出　　处：《混凝土》2020年第7期30-32,共3页Concrete

基　　金：国家自然科学基金项目(51178205)。

摘　　要：以天然浮石混凝土为研究对象,将橡胶颗粒近似为孔隙加入到混凝土中,将橡胶颗粒体积作为目标孔隙率。测试目标孔隙率在0、1.05%、1.13%、1.18%、2.11%、2.26%、2.37%、3.15%、3.39%、3.55%时,0.40、0.42、0.45三种水胶比条件下,天然浮石混凝土抗压强度和劈拉强度。根据强度变化规律,分别对抗压强度和劈拉强度的分布情况进行拟合。结果表明:天然浮石混凝土目标孔隙率与强度之间有良好的相关性,进而建立了天然浮石混凝土目标孔隙率与强度的经验计算式,为天然浮石混凝土孔隙率的研究提供了一定的理论参考。Taking the natural pumice concrete as the research object.The rubber particle volume were added into the concrete,taken as the target porosity approximately.Test the compressive and splitting tensile strength of natural pumice concrete when the target porosity is 0,1.05%,1.13%,1.18%,2.11%,2.26%,2.37%,3.15%,3.39% and 3.55%,the water binder ratio is 0.40,0.42 and 0.45.According to the rule of strength change,fitting respectively the distribution of compressive and splitting tensile strength.The conclusion shows that there is a favourable relation between target porosity and strength that can establish a empirical formula,providing certain theoretical reference for the study on porosity of natural pumice concrete.

关 键 词：天然浮石混凝土 橡胶颗粒 目标孔隙率 混凝土强度 经验公式 

分 类 号：TU528.01[建筑科学—建筑技术科学]