单掺粉煤灰和矿渣粉对磷酸镁水泥水化进程及强度的影响

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (7): 2472-2478.

所属专题：资源综合利用

单掺粉煤灰和矿渣粉对磷酸镁水泥水化进程及强度的影响

刘进¹, 韩达¹, 张增起²

1.北京城建集团有限责任公司,北京 100088;
2.北京科技大学冶金与生态工程学院,北京 100083

收稿日期:2023-03-22 修订日期:2023-05-15 出版日期:2023-07-15 发布日期:2023-07-25
作者简介:刘进(1992—),男,博士。主要从事建筑材料及建筑工程的研究。E-mail:liujin001@vip.qq.com
基金资助:
中国科协青年人才托举工程(2022QNRC001)

Effects of Single-Doped Fly Ash and GGBS on Hydration Process and Strength of Magnesium Phosphate Cement

LIU Jin¹, HAN Da¹, ZHANG Zengqi²

1. Beijing Urban Construction Group Co., Ltd., Beijing 100088, China;
2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

Received:2023-03-22 Revised:2023-05-15 Online:2023-07-15 Published:2023-07-25

摘要/Abstract

摘要： 以石英粉作为参照,通过监测水化热、悬浮液pH值及凝结时间变化研究了粉煤灰和矿渣粉(GGBS)对磷酸镁水泥水化进程的影响,并测定了砂浆的抗压强度及硬化浆体的孔结构。结果表明,粉煤灰和矿渣粉对磷酸镁水泥的水化具有较强的延缓作用,且矿渣粉的缓凝效果更强。粉煤灰和矿渣粉能够改善硬化浆体的孔结构,其中矿渣粉的改善效果更为显著。在15%(质量分数)掺量下,单掺粉煤灰和矿渣粉的磷酸镁水泥砂浆2 h抗压强度都略高于纯磷酸镁水泥砂浆。掺粉煤灰的磷酸镁水泥砂浆后期抗压强度等于或略高于纯磷酸镁砂浆,掺矿渣粉的磷酸镁水泥砂浆后期抗压强度显著高于纯磷酸镁水泥砂浆。

关键词: 粉煤灰, 矿渣粉, 磷酸镁水泥, 水化进程, 抗压强度, 孔结构

Abstract: Taking quartz powder as a reference, the effects of fly ash and ground granulated blast furnace slag powder (GGBS) on the hydration process of magnesium phosphate cement were researched by monitoring the changes of hydration heat, suspension pH value and setting time. In addition, the compressive strength of mortar and pore structure of hardened paste were determined. The results show that fly ash as well as GGBS have strong delaying effects on the hydration of magnesium phosphate cement, and the delaying effect of GGBS is stronger. Fly ash and GGBS can improve the pore structure of hardened paste, and the improving effect of GGBS is more significant. When the replacement ratio is 15% (mass fraction), the compressive strength of magnesium phosphate cement containing fly ash or GGBS is higher than that of pure magnesium phosphate cement at 2 h. The compressive strength of magnesium phosphate cement containing fly ash is equal to or higher than that of pure magnesium phosphate cement at late ages. While the compressive strength of magnesium phosphate cement containing GGBS is significantly higher than that of pure magnesium phosphate cement at late ages.

Key words: fly ash, GGBS, magnesium phosphate cement, hydration process, compressive strength, pore structure

中图分类号:

TQ172

刘进, 韩达, 张增起. 单掺粉煤灰和矿渣粉对磷酸镁水泥水化进程及强度的影响[J]. 硅酸盐通报, 2023, 42(7): 2472-2478.

LIU Jin, HAN Da, ZHANG Zengqi. Effects of Single-Doped Fly Ash and GGBS on Hydration Process and Strength of Magnesium Phosphate Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(7): 2472-2478.

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单掺粉煤灰和矿渣粉对磷酸镁水泥水化进程及强度的影响

Effects of Single-Doped Fly Ash and GGBS on Hydration Process and Strength of Magnesium Phosphate Cement

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