矿物掺合料对净浆失水、收缩及相对湿度的影响  

Effect of mineral admixtures on the loss of water,shrinkage and relative humidity of the cement paste

作　　者：费治华[1,2] 秦鸿根[1] 刘加平[2] 

机构地区：[1]东南大学材料科学与工程系,江苏南京210096 [2]江苏省建筑科学研究院有限公司,江苏南京210008

出　　处：《水运工程》2009年第2期43-47,共5页Port & Waterway Engineering

摘　　要：研究了在固定水胶比条件下,矿物掺合料的种类和掺量对水泥净浆失水、收缩及内部相对湿度的影响。结果表明:随粉煤灰掺量的增加,净浆失水率及干缩率随之增大。矿渣对水泥净浆的失水和干缩影响较小,在一定掺量范围内(50%)随矿渣掺量的增大失水率降低,干缩则随掺量的增大而增大,但超过50%这一范围后,干缩随之减小,失水随之增加。粉煤灰随掺量的增大,浆体内部相对湿度下降缓慢,自收缩也随之降低;矿渣随掺量增大,浆体内部湿度下降缓慢,但自收缩随之增大。The effects the cement paste are studied of the mineral admixtures on the loss of water, shrinkage and relative humidity of under the constant water-cement ratio. The results indicate that with the increase dosage of fly-ash, the loss of water and drying shrinkage of cement paste increase. As for slag, within a certain dosage of slag （about 50%）, the loss of water decreases, but the drying shrinkage increases with the increase of the dosage of slag. After exceeding the dosage of 50%, the drying shrinkage decreases, while the loss of water increases. As a result of slow rate of hydration of fly-ash, with the increasing dosage of fly-ash, the humidity of the paste descendes slowly, and the self-shrinkage of the paste declines. As for slag, with the increasing dosage of slag, the humidity of the paste descendes slowly, but the self-shrinkage of the paste increases.

关 键 词：矿物掺合料 收缩 相对湿度 失水 水泥净浆 

分 类 号：TU528[建筑科学—建筑技术科学]