水下不分散混凝土在海水环境下强度发展特性  

Law of strength development of non-dispersible underwater concrete in seawater

作　　者：赵晶[1] 王进京[1] 吴会军[1] 

机构地区：[1]大连交通大学土木与安全工程学院,辽宁大连116028

出　　处：《混凝土》2015年第8期31-34,共4页Concrete

基　　金：国家自然科学基金资助项目(51472040)

摘　　要：采用水下浇筑工艺配制水下不分散混凝土,并掺加不同的矿物掺合料,在淡水和海水两种条件下成型、养护混凝土试件,通过力学性能试验和XRD试验,研究水下不分散混凝土的强度发展规律。结果表明:海水中丰富的盐离子能促进水泥水化,提高水下不分散混凝土的早期强度,但是会降低后期强度;矿物掺合料因改善混凝土的和易性和增加水泥的水化产物,有助于提高水下不分散混凝土的强度。By using underwater pouting craft and different kinds of mineral admixtures,we mix non - dispersible underwater concrete. The concrete samples are made and cured in two different conditions, in fresh water, in seawater. We study the law of strength development of non - dispersible underwater concrete through mechanical properties test and XRD test.The results show that the plentiful ions in seawater promote cement hydration, and increase the early strength of non - dispersible underwater concrete, but lower the long - term strength. Bcause of making workability of concrete be better and increasing hydration products of cement, mineral admixtures are helpful to improving strength of non - dispersible underwater concrete.

关 键 词：水下不分散混凝土 强度 掺合料 XRD 

分 类 号：TU528.01[建筑科学—建筑技术科学]