摘要
海水对混凝土的侵蚀作用决定了海洋环境中混凝土结构的服役性能。本文研究了模拟海水对高性能混凝土浆体(掺加粉煤灰、矿渣、硅灰以及石灰石粉的低水胶比浆体)的侵蚀作用,结果表明:矿物掺和料能阻碍海水的侵蚀,却导致浆体的早期强度较低。粉煤灰对后期强度贡献较大,而对早期强度影响最严重;掺加石灰石粉的浆体早期强度较高,但后期强度损失较大;掺矿渣的浆体后期强度损失较大,膨胀率较高;掺硅灰的浆体膨胀率低,强度损失较小。评价综合指标,掺硅灰的浆体整体表现出较好的抗海水侵蚀能力。
The erosion of seawater on concrete determines the serviceability of concrete structures in the marine environment. This paper studies erosion effect on the high-performance concrete paste(low watercement ratio paste composing with fly ash,slag,silica fume and limestone powder) under simulated seawater. The results show that,erosion of seawater is hindered to some tense by adding mineral admixtures,but leads to low early strength. Fly ash contributes a lot on late strength,but the early strength is ruined. Cement composing with limestone powder brings the paste high early strength,but the greater late strength loss. The late strength loss and expansion rates of paste mixing with slag are great. The paste adding silica fume has low expansion rates with less strength loss,the overall performance of resistant capability under seawater is better.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2016年第10期3319-3323,共5页
Bulletin of the Chinese Ceramic Society
关键词
矿物掺和料
高性能混凝土浆体
模拟海水
强度
膨胀率
mineral admixture
high-performance concrete paste
simulated seawater
strength
expansion rate
