文献类型：期刊文献

中文题名：双掺稻壳灰和石灰石粉对混凝土干燥收缩的影响

英文题名：Effect on drying shrinkage of concrete mixed with rice husk ash and limestone powder

作者：刘春[1];何智海[2]

机构：[1]宁德师范学院建筑工程系;[2]绍兴文理学院土木工程学院

年份：2016

期号：9

起止页码：79

中文期刊名：混凝土

外文期刊名：Concrete

收录：CSTPCD、、北大核心2014、北大核心

基金：湖南省科技计划发展项目(2006sk4017)

语种：中文

中文关键词：稻壳灰;石灰石粉;干燥收缩;保水性

外文关键词：rice husk ash; limestone powder; drying shrinkage; water retention;

中文摘要：通过测试不同龄期混凝土干燥收缩和相应砂浆的失水量,研究了双掺稻壳灰和石灰石粉对混凝土干燥收缩的影响及机理,并分析了干燥收缩与保水性的关系。结果表明:双掺15%稻壳灰和适量石灰石粉可以有效降低混凝土干燥收缩,且随着石灰石粉掺量的增加,混凝土干燥收缩不断增大,其掺量不宜超过25%;混凝土干燥收缩与相应砂浆的失水量有着较好的线性回归关系,较高的保水性对应着较低的干燥收缩。

外文摘要：The effect and mechanism of a mixture of rice husk ash and limestone powder on drying shrinkage of concrete were studied by testing concrete drying shrinkage and corresponding mortar water loss at different ages.And the relationship between drying shrinkage and water loss was analyzed also.The results indicate that drying shrinkage of concrete mixed with 15% rice husk ash and a moderate amount of limestone powder can be reduced effectively.Concrete drying shrinkage is increased with the increase of limestone powder,and the dosage of limestone powder should not be more than 25%.There is a good linear regression relationship between concrete drying shrinkage and corresponding mortar water loss,and the higher water retention corresponds with the lower drying shrinkage.