福州大学学报（自然科学版）2011，Vol.39Issue(6)：941-946,6.DOI:35-1117/N.20111220.0951.017
陶粒预湿程度对轻骨料混凝土自收缩的影响
Effect of ceramsite prewetting degree on autogenous shrinkage of lightweight aggregate concrete
摘要
Abstract
The water absorption and desorption process of different prewetting degree ceramsites embe-ded in ceramsite concrete was obtained by an U - shape tube micro pressure measurement device. The pore size distribution of hardened cement paste in ceramsite concrete was tested by a nitrogen adsorption method. The ceramsite concrete internal humidity was monitored by adopting a humidity measurement instrument. The autogenous shrinkage of ceramsite concrete was also tested by using an erecting dial indicator method. The study reveals that for the ceramsites embeded in ceramsite concrete, with the increase of ceramsite prewetting degree, the ability of water absorption declines and the ability of water desorption increases, and the internal humidity of ceramsite concretes declines, and the autogenous shrinkage of ceramsite concretes also decreases.关键词
陶粒混凝土/吸水/返水/氮气吸附/内部湿度/自收缩Key words
ceramsite concrete/ water absorption/ water desorption/ nitrogen adsorption/ internal humidity/ autogenous shrinkage分类
建筑与水利引用本文复制引用
陈永波,季韬,陈彩艺,李锋,梁咏宁,林旭健..陶粒预湿程度对轻骨料混凝土自收缩的影响[J].福州大学学报（自然科学版）,2011,39(6):941-946,6.基金项目
国家自然科学基金资助项目(51078090) （51078090）
