水玻璃-Na2CO3激发富镁镍渣-粉煤灰基地质聚合物的制备及性能

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (2): 582-588.

水玻璃-Na₂CO₃激发富镁镍渣-粉煤灰基地质聚合物的制备及性能

刘云¹, 封春甫¹, 刘洋¹, 杨圣玮¹, 王觅堂^1,2

1.内蒙古科技大学材料与冶金学院,包头 014010;
2.上海理工大学材料科学与工程学院,上海 200093

收稿日期:2021-07-01 修回日期:2021-09-13 出版日期:2022-02-15 发布日期:2022-03-01
通讯作者: 王觅堂,博士,教授。E-mail:btwmt@126.com
作者简介:刘云(1997—),男,硕士研究生。主要从事固废处理研究。E-mail:mbyliuyun@163.com
基金资助:
国家自然科学基金(51974168,51662033);硅酸盐建筑材料国家重点实验室(武汉理工大学)开放基金(SYSJJ2020-08);内蒙古自治区科技重大专项(2019ZD023)

Preparation and Properties of Sodium Silicate-Na₂CO₃ Activated Magnesium-Rich Nickel Slag-Fly Ash Based Geopolymer

LIU Yun¹, FENG Chunfu¹, LIU Yang¹, YANG Shengwei¹, WANG Mitang^1,2

1. College of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China;
2. College of Materials Science and Engineering, Shanghai University of Technology, Shanghai 200093, China

Received:2021-07-01 Revised:2021-09-13 Online:2022-02-15 Published:2022-03-01

摘要/Abstract

摘要： 本文使用正交试验法,研究了富镁镍渣与粉煤灰的质量比、复合碱激发剂(水玻璃-Na₂CO₃)掺量及水胶比对富镁镍渣-粉煤灰基地质聚合物力学性能的影响,通过XRD、SEM、EDS及TG等测试方法对水化产物进行表征。结果表明,最优试样28 d抗压强度可达37.50 MPa。XRD结果显示,7 d与28 d的水化产物中含有水化硅酸钙凝胶,结合SEM、EDS分析可知,产物中还有菱沸石(N-A-S-H)与钠镁硅铝酸盐(N-M-A-S)无定形凝胶相,这些凝胶相是地质聚合物强度增加的主要原因。

关键词: 碱激发地质聚合物, 复合碱激发剂, 富镁镍渣, 粉煤灰, 力学性能

Abstract: In this paper, the effects of the mass ratio of magnesium-rich nickel slag and fly ash, the content of composite alkali activator (sodium silicate-Na₂CO₃) and water binder ratio on the mechanical properties of magnesium-rich nickel slag-fly ash based geopolymer were studied by orthogonal test. The products were characterized by XRD, SEM, EDS and TG. The results show that the 28 d compressive strength of the optimal sample reaches 37.50 MPa. XRD results shows that calcium silicate gel form in the products of 7 d and 28 d. SEM and EDS analysis show that there are chabazite (N-A-S-H) and sodium magnesium aluminum silicate gel (N-M-A-S) amorphous gel phases in the products. These gel phases are the main reasons for the increase of the strength of geopolymer.

Key words: alkali activated geopolymer, composite alkali activator, magnesium-rich nickel slag, fly ash, mechanical property

中图分类号:

TQ172.4⁺4

刘云, 封春甫, 刘洋, 杨圣玮, 王觅堂. 水玻璃-Na₂CO₃激发富镁镍渣-粉煤灰基地质聚合物的制备及性能[J]. 硅酸盐通报, 2022, 41(2): 582-588.

LIU Yun, FENG Chunfu, LIU Yang, YANG Shengwei, WANG Mitang. Preparation and Properties of Sodium Silicate-Na₂CO₃ Activated Magnesium-Rich Nickel Slag-Fly Ash Based Geopolymer[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(2): 582-588.

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水玻璃-Na₂CO₃激发富镁镍渣-粉煤灰基地质聚合物的制备及性能

Preparation and Properties of Sodium Silicate-Na₂CO₃ Activated Magnesium-Rich Nickel Slag-Fly Ash Based Geopolymer

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