保水率和含气量对水泥砂浆抗塑性开裂性能影响的研究

Effect of Retention Rate and Air Content on the Plastic Shrinkage and Cracking of Mortar

通过研究在三种不同环境条件下的砂浆保水率、含气量与塑性抗拉强度和水分蒸发速率的关系,探讨砂浆保水率和含气量对砂浆塑性收缩开裂的影响。试验结果表明,保水率是决定砂浆阻裂性能好坏的主要因素,其原因主要是高保水率砂浆表面水分蒸发速率较小。

In order to study the effect of retention rate and air content on the plastic shrinkage and cracking of mortar, relations between retention rate and air content with the rate of water evaporation and the plastic tensile strength was studied under three different conditions. The results show that, retention rate is the key factor to affect the cracking for the mortar of higher retention rate with the lower rate of water evaporation .