摘要
通过对水泥胶砂试件的潜在膨胀性能及试件在硫酸钠环境中的抗侵蚀性能的试验研究,讨论了水泥品种、粉煤灰掺量、无碱速凝剂及养护时间对水泥-粉煤灰复合胶凝材料抗硫酸盐侵蚀性能的影响。结果表明,粉煤灰能够较好的抑制硫酸盐侵蚀所引起的膨胀,但这种抑制作用主要表现在后期;在无碱速凝剂存在的条件下,粉煤灰对水泥抗硫酸盐性能的影响尤为显著。同时,粉煤灰能够显著提高硫酸盐侵蚀环境下长龄期水泥胶砂试件的抗压强度。经过充分养护的水泥胶砂试件也有较好的抗硫酸盐性能。
Through the experimental study on the potential expansion character stics and the corrosion resistance of cement-mortar in the circumstance of sodium sulfate, the effects of different types of cement, fly ash content, non-alkaline accelerator and the curring time on the sulfate corrosion resistance of cement-fly ash composites are discussed. As a result, the fly ash can greatly restrain the expansion caused by sulfate attack, but the restraint is mainly acted in the later process period. The effect of fly ash on sulfate corrosion resistance is especially obvious with non-alkaline accelerator. Meanwhile, the fly ash can obviously improve the compression strength of cement-mortar at the long-age and in the circumstance of sulfate attack. And the cement-mortar could have a good sulfate resistance under a good curring.
出处
《混凝土与水泥制品》
北大核心
2009年第5期21-23,共3页
China Concrete and Cement Products
关键词
粉煤灰
水泥
抗硫酸盐性能
膨胀
Fly ash
Cement
Sulfate corrosion resistance
Expansion
