摘要
模拟地下水热系的成岩机理,利用水热固化技术在反应釜中将海砂固化成高强度(抗折强度≥20MPa)的新型建筑材料.结果表明:硅酸钙水合物(C-S-H)和托勃莫来石相的生成提高了海砂固化体的强度;消石灰掺量、固化时间和温度均影响C-S-H和托勃莫来石的生成;水热固化可使海砂固化体的氯离子溶出量大大降低,达到了中国建设部制定的建筑用海砂中氯离子含量(溶出量)标准.
To develop and construct island, sea sand had been solidified into construction materials with flexural strength more than 20 MPa under hydrothermal conditions by simulating diagenetic mechanism of underground. The experimental results show that the development in strength is mainly due to the forma- tion of tobermorite and calcium silicate hydrate（C-S-H）. Ca（OH）2 content, curing time and curing tem- perature influence formation of tobermorite. The chloride ion dissolving-out content of the sea sand from solidified sample decreases significantly after hydrothermal solidification, which is far less than regulation made by Ministry of Construction of China.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2016年第4期613-618,共6页
Journal of Building Materials
关键词
水热固化
海砂
托勃莫来石
氯离子溶出量
建筑材料
hydrothermal solidification
sea sand
tobermorite
chloride ion dissolving-out content
build- ing material
