氨基三亚甲基膦酸和磷酸二氢钾改性发泡硫氧镁水泥

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (11): 3958-3967.

氨基三亚甲基膦酸和磷酸二氢钾改性发泡硫氧镁水泥

张玉婷¹, 侯占利², 乔紫璇¹, 付新宇¹, 杨红健¹, 刘晓莉¹

1.河北工业大学化工学院,天津 300400;
2.天津市津安热电有限公司,天津 300204

收稿日期:2024-04-23 修订日期:2024-05-31 出版日期:2024-11-15 发布日期:2024-11-21
通信作者: 杨红健,博士,副教授。E-mail:1991033@hebut.edu.cn刘晓莉,博士,副教授。E-mail:1993041@hebut.edu.cn
作者简介:张玉婷(1999—),女,硕士研究生。主要从事轻质镁胶凝材料的研究。E-mail:13287113703@163.com
基金资助:
天津能源集团津安热电有限公司高性能板房建筑热工性能研究应用项目(JARD202307140118)

Amino Trimethylene Phosphonic Acid and Potassium Dihydrogen Phosphate Modified Foamed Magnesium Oxysulfate Cement

ZHANG Yuting¹, HOU Zhanli², QIAO Zixuan¹, FU Xinyu¹, YANG Hongjian¹, LIU Xiaoli¹

1. School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300400, China;
2. Tianjin Jin'an Thermal Power Co., Ltd., Tianjin 300204, China

Received:2024-04-23 Revised:2024-05-31 Published:2024-11-15 Online:2024-11-21

摘要/Abstract

摘要： 以有机膦酸-氨基三亚甲基膦酸(ATMP)为改性剂制备发泡硫氧镁水泥(FMOSC),分别探究ATMP单掺改性及ATMP与磷酸二氢钾(KDP)复合改性对FMOSC干密度、抗压强度、耐水性能等性能的影响。通过孔结构分布、XRD、FT-IR、TG-DSC、FESEM等多种微观测试、分析和表征手段,对改性前后FMOSC的物相组成及微观形貌进行分析。结果表明,相比于ATMP单掺改性,复合改性在m(ATMP)∶m(KDP)=1∶1、总掺量1.00%(质量分数,下同)时效果最佳,对FMOSC的耐水性能和孔结构有显著优化作用。改性剂的加入使FMOSC的物相组成发生改变,生成了新的强度相5Mg(OH)₂·MgSO₄·7H₂O(5·1·7相)。

关键词: 发泡硫氧镁水泥, 5·1·7相, 孔结构, 耐水性能, 抗压强度, 改性剂

Abstract: Foamed magnesium oxysulfate cement (FMOSC) was prepared by using organophosphonic acid-amino trimethylene phosphonic acid (ATMP) as a modifier, and the effects on dry density, compressive strength, and water resistance of FMOSC were investigated when ATMP was modified alone and when ATMP was modified in combination with potassium dihydrogen phosphate (KDP), respectively. The physical phase composition and microscopic morphology of FMOSC before and after modification were analyzed by a variety of microscopic tests, analyses and characterizations, such as pore structure distribution, XRD, FT-IR, TG-DSC and FESEM. The results show that the compound modification is most effective at m(ATMP)∶m(KDP)=1∶1 with a total dosage of 1.00% (mass fraction, same as below) compared to ATMP single modification, and it has a significant enhancement on the water resistance and pore structure of FMOSC. The addition of the modifier changes the physical phase composition of FMOSC and generates a new strength phase 5Mg(OH)₂·MgSO₄·7H₂O (5·1·7 phase).

Key words: foamed magnesium oxysulfate cement, 5·1·7 phase, pore structure, water resistance, compressive strength, modifier

中图分类号:

TQ172.1

张玉婷, 侯占利, 乔紫璇, 付新宇, 杨红健, 刘晓莉. 氨基三亚甲基膦酸和磷酸二氢钾改性发泡硫氧镁水泥[J]. 硅酸盐通报, 2024, 43(11): 3958-3967.

ZHANG Yuting, HOU Zhanli, QIAO Zixuan, FU Xinyu, YANG Hongjian, LIU Xiaoli. Amino Trimethylene Phosphonic Acid and Potassium Dihydrogen Phosphate Modified Foamed Magnesium Oxysulfate Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(11): 3958-3967.

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