硅酸盐学报2017，Vol.45Issue(2)：227-234,8.DOI:10.14062/j.issn.0454-5648.2017.02.08
养护温度对丁苯乳液/硫铝酸盐水泥砂浆物理力学性能的影响
Influence of Curing Temperature on Physical and Mechanical Properties of Styrene-Butadiene Rubber Latex/Sulphoaluminate Cement Mortar
摘要
Abstract
Styrene-butadiene rubber (SBR) latex was used to modify sulphoaluminate cement (CSA) mortar and the mechanical properties, drying shrinkage and water absorption rate were investigated. The effect of curing temperature (i.e., low (0, 5℃), room (20℃) and high (40℃)) temperatures on the properties of the SBR/CSA mortar was also analyzed. The results show that SBR latex improves the properties of the CSA mortar at different curing temperatures. The compressive, flexural and tensile bond strengths of mortar firstly decrease and then increase with the increase of SBR dosage. The flexural strength and tensile bond strength increase, the ratio of compressive strength to flexural strength decreases, the flexibility improves and the water absorption rate decreases in the case of appropriate addition of SBR. The compressive, flexural and tensile bond strengths increase with curing temperature, but the curing temperature has different effects at different ages and SBR dosages. At certain ages, high and low curing temperature both can favor the improvement of the flexibility. The curing temperature has different effects on the shrinkage rate of the control and modified morta. The control mortar expands in early age under high curing temperature, but the modified mortars don’t expand under all curing temperatures. SBR latex can improve the performance of CSA mortar at room temperature and enhances its performance at low and high temperatures.关键词
低温/室温/高温/丁苯乳液/硫铝酸盐水泥/物理力学性能Key words
low temperature/room temperature/high temperature/styrene-butadiene rubber latex/sulphoaluminate cement/physical and mechanical properties分类
建筑与水利引用本文复制引用
王茹,许运东..养护温度对丁苯乳液/硫铝酸盐水泥砂浆物理力学性能的影响[J].硅酸盐学报,2017,45(2):227-234,8.基金项目
国家自然科学基金(51572196)；中央高校基本科研业务费专项资金(0500219229)；中德科学中心项目(GZ 1290)资助。 （51572196）
