砂灰比及粒径对水泥砂浆特性的影响研究  

Research on Effect of Sand-cement Ratio and Particle Size on Cement Mortar Properties

作　　者：郑晓国[1] ZHENG Xiaoguo(Department of Roads and Bridges,Zhejiang Institute of Communications,Hangzhou,Zhejiang 311112,China)

机构地区：[1]浙江交通职业技术学院路桥学院,浙江杭州311112

出　　处：《施工技术》2020年第2期103-106,共4页Construction Technology

基　　金：国家自然科学基金(41672294)。

摘　　要：为研究不同砂灰比和不同粒径下水泥砂浆强度、波速和孔隙度变化规律,制备不同类型水泥砂浆试样分别进行强度、波速和孔隙度测试试验。研究结果表明:砂灰比越大,水泥砂浆强度和波速值越小,而孔隙度越大;粒径越大,水泥砂浆强度和波速值越大,孔隙度越小;水泥砂浆存在一个砂灰比的临界域,在临界域之前,随着砂灰比不断增大,强度平稳下降,达到临界域后,强度和波速显著降低,孔隙度明显增大,本次试验所得砂灰比临界域为5~6。In order to study the variation of strength,wave velocity and porosity of cement mortar under different sand-cement ratio and particle size,different types of cement mortar samples were prepared for strength test,wave velocity test and porosity test.The results show that the larger the mortar-cement ratio is,the smaller the strength and wave velocity value of cement mortar are,and the larger the porosity is;the larger the particle size is,the greater the strength and wave velocity value of cement mortar are,and the smaller the porosity is.There is a critical region of mortar-cement mix ratio before the critical region,the strength decreases steadily with the increasing mortar-cement ratio.After reaching the critical region,the strength and wave velocity decrease significantly,and the porosity increases significantly.The critical region of sand-cement ratio obtained in this experiment is 5~6.

关 键 词：水泥砂浆 试验 强度 波速 砂灰比 临界域 

分 类 号：TU528[建筑科学—建筑技术科学]