沸石微粉对磷酸钾镁水泥水化性能的影响

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (9): 3083-3088.

沸石微粉对磷酸钾镁水泥水化性能的影响

邓永刚, 代婷婷, 孙晨, 杨元全

沈阳理工大学材料科学与工程学院,沈阳 110159

收稿日期:2023-05-06 修订日期:2023-06-28 出版日期:2023-09-15 发布日期:2023-09-14
通信作者: 杨元全,博士,副教授。E-mail:aquarius0109@163.com
作者简介:邓永刚(1984—),男,博士,副教授。主要从事钢纤维混凝土的研究。E-mail:yonggangdeng@126.com
基金资助:
辽宁省教育厅基础研究项目(LJKZ0251)

Effect of Zeolite Powder on Hydration Properties of Potassium Magnesium Phosphate Cement

DENG Yonggang, DAI Tingting, SUN Chen, YANG Yuanquan

School of Material Science and Engineering, Shenyang Ligong University, Shenyang 110159, China

Received:2023-05-06 Revised:2023-06-28 Online:2023-09-15 Published:2023-09-14

摘要/Abstract

摘要： 为提高磷酸镁水泥的水化性能,利用沸石微粉替代部分氧化镁制备磷酸钾镁水泥,结合凝结时间、力学性能测试和水化放热、物相、微观形貌分析研究掺加沸石微粉对磷酸钾镁水泥基本性能的影响。结果表明:沸石微粉的掺量为8%(质量分数)时,磷酸钾镁水泥的水化凝结时间延长至10.17 min,但同时其7 d抗压强度和抗折强度降低至44.6和8.0 MPa;随着沸石微粉掺量的增加,K型鸟粪石的生成量有所降低;当沸石微粉掺量不超过12%(质量分数)时,磷酸钾镁水泥的水化放热总量提高,但进一步掺加沸石微粉,磷酸钾镁水泥中氧化镁含量降低,磷酸钾镁水泥水化放热降低。

关键词: 磷酸钾镁水泥, 沸石, K型鸟粪石, 凝结时间, 力学性能, 水化放热

Abstract: In order to improve the hydration property of magnesium phosphate cement, potassium magnesium phosphate cement was prepared by replacing part of magnesium oxide with zeolite powder. The influence of adding zeolite powder on the basic properties of potassium magnesium phosphate cement was studied by combining setting time test, mechanical properties test, hydration heat, phase identification and micro-morphology analysis. The results show that the hydration setting time of potassium magnesium phosphate cement is extended to 10.17 min when the content of zeolite powder is 8% (mass fraction), but at the same time its 7 d compressive strength and flexural strength are reduced to 44.6 and 8.0 MPa. With the increase of zeolite powder content, the amount of K-type struvite decreases. When the content of zeolite powder is not exceed 12% (mass fraction), the total hydration heat of potassium magnesium phosphate cement increases, but further adding zeolite powder can reduce the magnesium oxide in potassium magnesium phosphate cement and the hydration heat of potassium magnesium phosphate cement.

Key words: potassium magnesium phosphate cement, zeolite, K-type struvite, setting time, mechanical property, hydration heat

中图分类号:

TQ172

邓永刚, 代婷婷, 孙晨, 杨元全. 沸石微粉对磷酸钾镁水泥水化性能的影响[J]. 硅酸盐通报, 2023, 42(9): 3083-3088.

DENG Yonggang, DAI Tingting, SUN Chen, YANG Yuanquan. Effect of Zeolite Powder on Hydration Properties of Potassium Magnesium Phosphate Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(9): 3083-3088.

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