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.
出处
《水运工程》
北大核心
2009年第2期43-47,共5页
Port & Waterway Engineering
关键词
矿物掺合料
收缩
相对湿度
失水
水泥净浆
mineral admixtures
shrinkage
relative humidity
loss of water
cement paste
