期刊
CEMENT AND CONCRETE RESEARCH
卷 144, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2021.106438
关键词
C-A-S-H; Equilibration time; ICP-OES; TGA; FTIR
资金
- Swiss National Science Foundation (SNF) [200021_169014]
- Swiss National Science Foundation (SNF) [200021_169014] Funding Source: Swiss National Science Foundation (SNF)
The study found that longer equilibration time leads to lower aluminum concentrations in C-S-H and higher aluminum uptake. At low Ca/Si ratios, there was little further decrease in aluminum concentrations after 2 years, while at high Ca/Si ratios, a stable equilibrium was reached faster.
Calcium silicate hydrate (C-S-H) is the main hydration product of Portland cements. The partial replacement of Portland cements by supplementary cementitious materials can result in C-S-H with lower Ca/Si ratios and more aluminum and alkalis. The effect of equilibration time on Al uptake in C-S-H was investigated using equilibration times from 7 days up to 3 years. Lower Al concentrations were measured in the solution after longer equilibration times. In addition, a higher uptake of Al in C-S-H was observed based on the decrease in the content of secondary phases. Little further decrease in Al concentrations was observed after 2 years and longer at low Ca/Si. At high Ca/Si no significant change in solution concentrations was observed after more than 3 month, while the destabilization of secondary phases continued up to 1 year, indicating that a (meta)stable equilibrium was reached faster at higher Ca/Si ratios.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据