摘要
本文主要研究了粉煤灰、矿渣、硅灰和石灰石对不同龄期混凝土抗盐冻剥蚀性能的影响。结果表明:(1)硅灰可显著地提高混凝土的抗盐冻剥蚀性能;(2)粉煤灰和矿渣可使短龄期混凝土的抗盐冻剥蚀性能降低,但在经长时间养护后有可能使该性能改善;(3)石灰石明显使混凝土抗盐冻剥蚀性能劣化。
In this paper, effects of blending components, such as fly ash, slag, silica fume and limestone on the deicer-frost resistance of concrete were investigated. Results showed: (1) the use of blended cement with limestone significantly reduced the deicer-frost resistance of concrete, even if the addition amount of limestone was as low as 10%; (2) addition of silica fume obviously enhanced the deicer-frost resistance of concrete; (3) addition of slag or fly ash decreased the deicer-frost resistance of concrete, but improved it Only after long-term curing.
关键词
掺合料
盐冻剥蚀
混凝土
性能
blending component
deicer-frost scaling
freezing-thawing cycle
air-entraining agent
