养护条件对水泥砂浆干缩性能的影响  

Influence of curing conditions on the drying shrinkage characteristics of cement mortar

作　　者：黄颖星[1] 严生[1] 蔡安兰[2] 邓敏[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]盐城工学院材料科学与工程系,江苏盐城224003

出　　处：《南京工业大学学报（自然科学版）》2006年第3期20-23,共4页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家"973"基金资助项目(2001CB610705)

摘　　要：实验研究了养护条件(包括干燥前养护时间、干燥前养护温度和干燥时相对湿度)对砂浆干缩性能的影响。比较了养护时间(1 d,3 d,14 d),养护温度(20℃,60℃),相对湿度(30%,43%,75%)等对水泥砂浆干缩性能的影响。研究结果表明:延长干燥前养护时间,各砂浆干缩率增大;提高干缩前养护温度,不掺矿物外加剂的水泥砂浆干缩率减小,而掺矿物外加剂的水泥砂浆干缩率增大;干燥时相对湿度增加,水泥砂浆干缩率降低。The effects of curing conditions, such as curing time （ 1 d ,3 d, 14d）, curing temperature（20℃ ,60℃ ） and relative humidity（30% ,43% , 75% ）, on the drying shrinkage of cement mortar were studied and compared. The results reveal that generally higher drying shrinkage is to be expected with the increase of curing time before drying, with the rise in curing temperature, with the decrease in relativ with mineral admixture show the rising in drying shrinkage with e humidity with an exception that cement mortars the rise in curing temperature.

关 键 词：水泥砂浆 干缩率 干燥前养护时间 干燥前养护温度 湿度 

分 类 号：TQ172.12[化学工程—水泥工业]