含砂量对水泥砂浆强度与孔结构的影响  

Effect of Sand Content on Strength and Pore Structure of Cement Mortar

作　　者：周继凯[1] 金龙[1] 丁宁[1] 

机构地区：[1]河海大学土木与交通学院,南京210098

出　　处：《科学技术与工程》2013年第20期5855-5860,共6页Science Technology and Engineering

基　　金：国家自然科学基金项目(51178162;50979032)资助

摘　　要：探讨四种不同含砂量对水泥砂浆抗压、弯拉和劈拉强度的影响。通过试验研究了随着含砂量和水灰比的变化水泥砂浆孔结构的不同。通过测量孔隙率及压汞法测量孔径分布来描述水泥砂浆的孔结构。试验结果表明水泥砂浆的强度(弯拉,劈拉和抗压)随含砂量的增加而提高。含砂量对水泥砂浆的孔结构也有十分重要的影响,水泥砂浆强度与其孔结构间有一定的相关性,给出相对应孔结构参数(孔径分布与孔隙率)与强度的定量关系表达式。Results of a study conducted to evaluate the effect of four sand content on the compressive, flexural and splitting-tensile strength of cement mortar are report. An experimental investigation in the pore structure of ce- ment mortar brought about by changing the sand content and water/cement ratio is also reportsed. The changes in the pore structure were quantified by measuring the porosity, and pore size distribution obtained using mercury in- trusion porosimetry technique. Test results show that the strengths of cement mortar increase with increasing sand content. Sand content is an important parameter influencing the pore structure of cement mortar. Moreover, there is a good relationship between pore structure and strength of cement mortar. A quantative expression is given between strength and pore parameters.

关 键 词：抗压强度 抗拉强度 水灰比 砂灰比 

分 类 号：TU528.041.3[建筑科学—建筑技术科学]