关键词: 低温;干湿循环;水泥砂浆;硫酸盐侵蚀

Abstract: At low temperature(10 ℃)and dry wet cycles under the dual environment, experimental study on sulfate resistance of cement mortar specimens than different cementitious materials for different water cement, the water cement ratio by 0.5 and 0.36 respectively, the cementitious materials of ordinary portland cement,anti sulfur acid and Portland cement in ordinary portland cement was added to 15% +1%and 15% +3%powder of wollastonite powder and silica fume.The results show that at low temperature(10 ℃)-dry wet cycle double conditions,there exist physical chemical erosion and erosion, but the physical erosion; by reducing the water cement ratio or sulfate resistant Portland cement can significantly improve the sulfate resistance of mortar;in different water cement ratio, complex admixture and silica fume will get different results in low water ash can improve the sulfate resistance ratio, high water cement ratio will reduce the resistance to sulfate erosion.

Key words: low temperature;dry-wet cycle;cement mortar;sulfate attack