砂浆组成与其收缩性能的关系

Study on the Effect of Additives on the Shrinkage of Cement Mortars

研究了石灰膏、粉煤灰及聚合物（羧基丁苯乳胶）等掺合料对砂浆收缩性能的影响，探讨了不同组分砂浆的收缩机理，提出了降低砂浆收缩率的一些措施．

Cementitious mortars containing different kinds of additives were prepared and their shrinkage rate up to 90 d were measured.The test results show that the shrinkage rate increases with increasing the content of lime putty while decreases with increasing the content of fly ash or latex.The shrinkage mechanism of mortars containing different kinds of additives are discussed preliminary.Furthermore,some suggestions on reducing the shrinkage of mortar are proposed.