摘要
检测了掺入不同石膏的低热硅酸盐水泥的物理性能及水化率,并采用XRD、离子色谱法分析了不同石膏品种对低热水泥性能的影响机理。结果表明:硬石膏作缓凝剂时,低热水泥的强度随着石膏掺量的增加而逐步提高,掺量越大,对水泥的增强作用越明显。二水石膏对低热水泥强度的影响曲线呈波浪形。掺入硬石膏可提高水泥石液相中SO42-离子浓度,从而加快水泥中硅酸盐矿物的水化速度,显著提高低热水泥的强度。
The physical properties and hydrated rates of low-heat Portland cement prepared with different varieties of gypsum were tested. The influence of varieties and amount of gypsum on the performance of low-heat Portland cement was analyzed by means of XRD and ion chromatography. The results showed that when the anhydrous gypsum was used as setting retarder, the cement strength gradually improved along with the augment of anhydrous gypsum. And the more the augment was, the more obvious the function of enhancing strength was. The influence of dehydrate gypsum on the strength of the cement appeared the shape of wave. The SO4^2- concentration of solution increased by adding anhydrous gypsum, so the rate of hydration of silicate minerals accelerated, the strength of the cement improved obviously.
出处
《水泥》
CAS
北大核心
2010年第3期5-9,共5页
Cement
关键词
石膏品种
低热硅酸盐水泥
水化速度
离子色谱法
gypsum variety
low-heat Portland cement
hydrated rates
ion chromatography
