In the experiment,the influence of single defoamer,single shrinkage reducing agent and the compounds between them on the drying shrinkage and mass loss rate of polymer modified cement mortar were discussed.The results show that the drying shrinkage rate and mass loss rate of mortar will be reduced when defoamer is added alone,and the reduction effect is pro-portional to the dosage.When the shrinkage reducing agent is added alone,the drying shrinkage rate of the mortar will also be re-duced and the reduction effect is proportional to the dosage.Although the mass loss rate decreases as a whole when the shrinkage reducing agent is added alone,the inhibitory effect of shrinkage reducing agent on mass loss gradually decreases with the increase of dosage.The inhibitory effect of the two on the drying shrinkage and mass loss of mortar is greater than that of single mixing.There is obvious synergistic effect between them.Through research,it is found that there is a power function relationship between the mass loss rate of mortar and the drying shrinkage rate,which is affected by the type and dosage of admixture.
关键词
聚合物改性水泥砂浆/消泡剂/减缩剂/干燥收缩率/质量损失率
Key words
polymer modified cement mortar/defoamer/shrinkage reducing agent/drying shrinkage rate/mass loss rate
维普
万方数据