基于水灰比及水分蒸发速度的砂浆开裂本构方程.pdfVIP

学兔兔 建 筑 材 料 学 报 V01．i5，NO．1 第15卷第1期 2012年2月 JOURNAL OF BUILDING MATERIALS Feb．，2012 文章编号：1007—9629(2012)01-0075—05 基于水灰比及水分蒸发速度的砂浆开裂本构方程 张 乐， 马一平， 李国友， 杨晓杰 (同济大学 先进土木工程材料教育部重点实验室，上海 201804) 摘要：分别对不同水灰比的砂浆改变温度、湿度、光照及风速，模拟计算出平板砂浆水分蒸发速度， 研究了水分蒸发速度对砂浆抗裂指数的影响，建立了砂浆抗裂指数与水分蒸发速度的一元本构方 程以及砂浆抗裂指数关于水灰比和水分蒸发速度的二元本构方程，并利用该本构方程指导预测砂 浆的开裂趋势． 关键词：水分蒸发速度；水灰比；抗裂指数；本构方程 中图分类号：TU525 文献标志码：A doi：10．3969／j．issn．1007—9629．2012．O1．014 Constitutive Equation of Plastic Shrinkage Cracking Related to Water—Cement Ratio and Evaporation Rate of Water for Cement Mortar ZHANGLe， MA Yi—ping， L Guo—you， YANG Xiao-jie (Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education， Tongji University，Shanghai 201804，China) Abstract：Effect of evaporation rate of water on the cement mortar’S plastic shrinkage cracking was investi— gated by changing temperature，humidity，light exposure and wind speed with different water—cement ratio and the evaporation rate was calculated by simulation of mortar in smal1 mold．The constitutive equation of plastic shrinkage cracking on evaporation rate of water as well as the constitutive equation of plastic shrinkage cracking on both evaporation rate and water—cement ratio were established，which can be used to predict the plastic shrinkage cracking tendency of cement mortar． Key words：evaporation rate of water；water—cement ratio；crack—resisting index；constitutive equation 水泥基材料的塑性收缩开裂是工程建设中的常 裂的判据和本构方程．为了研究水分蒸发速度对水