摘要
采用工业级过烧镁砂、磷酸二氢铵、粉煤灰、硼砂、三聚磷酸钠和标准砂为原料制备磷酸镁水泥,探讨了原料配比参数如M/P值、胶砂比、粉煤灰掺量和缓凝剂的种类与掺量等对磷酸镁水泥性能的影响。结果表明,磷酸镁水泥的凝结时间、强度和微观结构随原料配比变化有较大差异。磷酸镁水泥凝结时间会随着M/P值的减小、水胶比的增大、硼砂和三聚磷酸钠掺量的增大而延长。适当的M/P值、粉煤灰掺量、水胶比、砂胶比和缓凝剂的掺量能够大幅提高磷酸镁水泥的强度。
Using market-bought industrial grade dead burned magnesia oxide, ammonium dihydrogen phosphate, fly ash, borax, sodium tripolyphosphate and standard sand as materials, magnesium phosphate cement was prepared in the study. The influence of M/P value, sand-binder ratio, fly ash content and the variety and dosage of retarders was discussed. The results show that the setting time, compressive strength and microstructure change greatly with different raw material ratio. The setting time increases with M/P value decreasing,the water-binder ratio and the dosages of borax and sodium tripolyphosphate growing. Appropriate M/P value, fly ash content, water-binder ratio, sand-binder ratio and the dosages of retarders can significantly improve the strength of magnesium phosphate cement.
出处
《四川建筑科学研究》
北大核心
2015年第4期73-78,共6页
Sichuan Building Science
基金
中国铁路总公司科技研究开发计划项目(2013G008-F)
关键词
磷酸镁水泥
凝结时间
抗压强度
缓凝剂
magnesium phosphate cement
setting time
compressive strength
retarders
