基于水灰比及水分蒸发速度的砂浆开裂本构方程

Constitutive Equation of Plastic Shrinkage Cracking Related to Water Cement Ratio and Evaporation Rate of Water for Cement Mortar

关键词:  水分蒸发速度  水灰比  抗裂指数  本构方程

Key words:  evaporation rate of water  water cement ratio  crack resisting index  constitutive equation

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.

Abstract:

Effect of evaporation rate of water on the cement mortars plastic shrinkage cracking was investigated 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 small 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.