硅酸盐通报2018，Vol.37Issue(1)：134-138,5.
MgO膨胀剂对水泥浆体收缩的影响
Effects of MgO Expansive Agent on Shrinkage of Cement Pastes
摘要
Abstract
The deformations of cement pastes containing light calcined MgO expansive agent cured in different curing conditions were measured.The hydration properties of MgO of cement pastes were analyzed by X-ray diffraction(XRD),thermogravimetric analysis(TG)/differential scanning calorimetry (DSC)and backscattered electron microscopy(BSEM).The results show that shrinkage of cement pastes is decreased by improving the relative humidity and prolonging pre-cured age.Light calcined MgO expansive agent produces effective expansion in the dry air curing conditions,has an excellent ability to compensate for shrinkage of cement pastes cured in low relative humidity.This is attributed to the formation of Mg(OH)2owing to the hydration of light calcined MgO expansive agent, and hence decreasing the shrinkage of cement pastes.关键词
氧化镁/收缩/相对湿度Key words
MgO/shrinkage/relative humidity分类
建筑与水利引用本文复制引用
张世华..MgO膨胀剂对水泥浆体收缩的影响[J].硅酸盐通报,2018,37(1):134-138,5.基金项目
福建省宁德市科技局项目(20150180) （20150180）
