矿渣和粉煤灰对混凝土塑性收缩裂缝的影响  

Effects of blastfurnace slag and fly ash on plastic shrinkage cracking of concrete

作　　者：王川[1] 杨长辉[1] 吴芳[1] 陈科[1] 

机构地区：[1]重庆大学建材系,重庆400045

出　　处：《混凝土》2002年第11期45-48,共4页Concrete

摘　　要：　在试验室控制环境条件下研究了矿渣和粉煤灰对混凝土塑性收缩裂缝的影响,结果表明:比表面积在4000cm2/g左右的矿渣掺入混凝土后对塑性收缩裂缝影响不明显。水胶比在0 36及以上时,混凝土掺入粉煤灰后在塑性阶段较易开裂;水胶比在0 36以下时,混凝土掺入粉煤灰后对塑性收缩裂缝具有抑制作用。试验同时测试了新拌混凝土的水分损失。The effects of blastfurnace slag and fly ash on plastic shrinkage cracking of concretes placed in laboratorycontrolled evironment condition were investigated.The experimental results indicate that there was no obvious influence on plastic shrinkage cracking of concretes containing blastfurnace slag(specific surface:about 4000cm2/g).Above the w/b ratio of 036,concrete mixtures containing fly ash are more sensitive to plastic shrinkage cracking than that of plain concrete mixtures,and below which the case is revered.Water loss of fresh concrete was also measured in this study.

关 键 词：矿渣 粉煤灰 混凝土 塑性收缩裂缝 水胶比 蒸发速率 

分 类 号：TU528.01[建筑科学—建筑技术科学]