氯化铵溶蚀下水泥基材料的固-液平衡方程

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (3): 741-749.

氯化铵溶蚀下水泥基材料的固-液平衡方程

汤玉娟¹, 左晓宝², 殷光吉³, 仝小芳¹, 许飞¹

1.扬州市职业大学土木工程学院,扬州 225009;
2.南京理工大学理学院,南京 210094;
3.宁波工程学院建筑与交通工程学院,宁波 315211

收稿日期:2020-08-04 修回日期:2020-11-11 出版日期:2021-03-15 发布日期:2021-04-13
通讯作者: 左晓宝,博士,教授。E-mail:xbzuo@sina.com
作者简介:汤玉娟(1989—),女,博士,讲师。主要从事混凝土耐久性方面的研究。E-mail:tyjdsr19891103@163.com
基金资助:
2020年江苏省高等学校自然科学研究面上项目(20KJB430030);浙江省自然科学基金探索项目(LQ21E080008);2019年扬州市建筑产业现代化专项引导资金项目(201911、201913);扬州市科技计划(YZ2019049);扬州市职业大学科研课题(2018ZD51)

Solid-Liquid Equilibrium Equation of Cement-Based Materials under Leaching of Ammonium Chloride

TANG Yujuan¹, ZUO Xiaobao², YIN Guangji³, TONG Xiaofang¹, XU Fei¹

1. School of Civil and Engineering, Yangzhou Polytechnic College, Yangzhou 225009, China;
2. School of Science, Nanjing University of Science & Technology, Nanjing 210094, China;
3. School of Civil and Transportation Engineering, Ningbo University of Technology, Ningbo 315211, China

Received:2020-08-04 Revised:2020-11-11 Online:2021-03-15 Published:2021-04-13

摘要/Abstract

摘要： 通过开展硬化水泥净浆与模拟孔溶液间的溶解平衡实验,获得了6 mol/L氯化铵溶液加速溶蚀条件下,硅酸盐水泥体系的固-液平衡曲线。实验得到的固-液平衡曲线与去离子水溶蚀条件下的平衡曲线相似,氯化铵溶液与去离子水溶液对水泥基材料具有相似的溶蚀机理。此外,氯化铵溶液溶蚀过程中还伴随着固相镁和固相硫的溶解流失,且其溶解流失规律与固相钙相似,也存在三个阶段,而固相Al和Fe基本不溶出。

关键词: 水泥基材料, 氯化铵, 溶蚀, 固-液平衡曲线

Abstract: The solid-liquid equilibrium curve of Portland cement system in 6 mol/L ammonium chloride solution was experimentally obtained using the dissolving equilibrium between cement paste powders and simulated pore solutions. The obtained equilibrium curve in nitrate solution has a similar three-stage form to that in water. The leaching mechanism of ammonium chloride solution on cement-based materials is similar to that of deionized water solution. In addition, leaching process of ammonium chloride solution is accompanied by the leaching of other solid elements (including sulfur and magnesium). And its dissolution loss has three stages, which is similar to solid phase calcium, but solid phase Al and Fe basically do not dissolve.

Key words: cement-based material, ammonium chloride, leaching, solid-liquid equilibrium curve

中图分类号:

TU528.01

汤玉娟, 左晓宝, 殷光吉, 仝小芳, 许飞. 氯化铵溶蚀下水泥基材料的固-液平衡方程[J]. 硅酸盐通报, 2021, 40(3): 741-749.

TANG Yujuan, ZUO Xiaobao, YIN Guangji, TONG Xiaofang, XU Fei. Solid-Liquid Equilibrium Equation of Cement-Based Materials under Leaching of Ammonium Chloride[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(3): 741-749.

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