可溶无水石膏Ⅲ对半水石膏水化过程的影响  

Mechanism Analysis of the Soluble Anhydrite Ⅲ in Hydration Process of β-hemihydrate gypsum

作　　者：郑绍聪[1] 余强[1] 宁平[2] 谢刚[1] 王智娟[3] 田林[1] 

机构地区：[1]昆明冶金研究院,昆明650031 [2]昆明理工大学环境科学与工程学院,昆明650031 [3]曲靖师范学院化学化工学院,云南曲靖655011

出　　处：《云南化工》2016年第3期1-5,共5页Yunnan Chemical Technology

基　　金：国家自然科学基金资助项目(E0415);曲靖师范学院校级青年项目(2012QN018)

摘　　要：研究了可溶无水石膏Ⅲ（AⅢ）对半水石膏水化过程的影响。采用常规分析方法、XRD和扫描电镜对半水石膏原料、水化过程和石膏产品进行分析和表征。结果表明：新粉AⅢ活性高,水化速度快,导致添加减水剂时几乎未见减水增强效果。陈化粉添加加速剂YT,当添加量在0.1%～0.2%时,石膏制品2h的强度增加22%,24 h的强度增加20%～30%;添加FDN减水剂,当掺量在0.2%时,水膏比从0.7 mL/g降低至0.6 mL/g（降低了14.2%）,减水效果明显。The paperstudied the influence of the soluble anhydrite III（A III） on the hydration process of β-hemihydrate gypsum.The raw material of β-hemihydrate gypsum,hydration processand gypsum products were analyzed by conventional analysis method,XRD and scanning electron microscopy.The results show that the activity of AⅢ is very high and the hydration speed is very quickly.So when the water reducing agents was investigated,the effects of reducing the amount of water and improving strength of gypsum products were not found.The additives of YT can improve the strength of gypsum products.When the amount is 0.1 ～ 0.2%,with 2-hour and 24-hour,the compressive strength can be improved to be 22%and 20 ～ 30% respectively.When the additives of FDN is 0.2%,the ratio of water-powder decreases from0.7mL / g to 0.6mL / g and the amount of water decreases nearly 14.2%.The water reduction is obvious.

关 键 词：无水石膏Ⅲ 半水石膏 增强加速剂 

分 类 号：TQ177.3[化学工程—硅酸盐工业] X705[环境科学与工程—环境工程]