硅酸盐学报2013，Vol.41Issue(4)：505-510,6.DOI:10.7521/j.issn.0454-5648.2013.04.13
膨胀剂与陶砂对低水灰比砂浆的减缩作用
Effects of Expansive Agent and Shale Pottery on Shrinkage Reduction of Lower Water-cement Ratio Mortar
摘要
Abstract
Cement-based materials behave a higher shrinkage when the water-cement ratio is low. The effects of sulphoaluminate expansive agent and internal curing of pre-saturated shale pottery on the shrinkage of mortar with a lower water-cement ratio were investigated. The results show that the expansive agent does not reduce the autogenous and dry shrinkage of the mortar. A higher dosage of pre-saturate shale pottery decreased the autogenous shrinkage of the mortar with a lower water-cement ratio, but increased the dry shrinkage and decreased the strength. By combining the expansive agent with the pre-saturated shale pottery, the autogenous and dry shrinkage were decreased and the adverse effects on the strength via the reduction of the amount of shale pottery at the same shrinkage reduction were eliminated. The maintenance of pre-saturated shale pottery, the expansive agent could hydrate effectively, and the combination of expansive agent and internal curing of shale pottery would be a potential way to reduce the shrinkage of cement-based materials with a lower water-cement ratio.关键词
膨胀剂/内养护/低水灰比/砂浆/收缩Key words
expansive agent/ internal curing/ low water-cement ratio/ mortar/ shrinkage分类
建筑与水利引用本文复制引用
陈伟,钱觉时,何兵,刘军,张琳,贾兴文..膨胀剂与陶砂对低水灰比砂浆的减缩作用[J].硅酸盐学报,2013,41(4):505-510,6.基金项目
国家"十二五"科技支撑(2011BAE14B06-03)资助项目. （2011BAE14B06-03）
