TiO2改性煤气化粗渣基地质聚合物的微观结构与性能

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (2): 520-525.

TiO₂改性煤气化粗渣基地质聚合物的微观结构与性能

张彤, 刘泽, 苏壮飞, 朱思雨

中国矿业大学(北京)化学与环境工程学院, 北京 100083

收稿日期:2021-09-30 修回日期:2021-12-22 出版日期:2022-02-15 发布日期:2022-03-01
通讯作者: 刘泽,博士,教授。E-mail:lzk1227@sina.com
作者简介:张彤(1997—),女,硕士研究生。主要从事固废资源化利用的研究。E-mail:18864832172@163.com
基金资助:
国家重点研发计划(2019YFC1904302);宁夏回族自治区重点研发计划(2020BCE01001,2021BEG92002);国家自然科学基金联合基金(U20A20324)

Microstructure and Properties of TiO₂ Modified Coal Gasification Coarse Slag Based Geopolymer

ZHANG Tong, LIU Ze, SU Zhuangfei, ZHU Siyu

School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China

Received:2021-09-30 Revised:2021-12-22 Online:2022-02-15 Published:2022-03-01

摘要/Abstract

摘要： 煤气化渣可分为粗渣和细渣,其有在碱激发领域应用的潜力。本文对煤气化粗渣的理化性能进行了研究,使用煤气化粗渣制备了地质聚合物,并对其进行了TiO₂的改性研究。结果表明,在煤气化粗渣基地质聚合物中掺入一定量的TiO₂可明显改善其力学性能。当掺入质量分数为10.0%的TiO₂时,样品28 d的抗压强度可从23.4 MPa提高到42.9 MPa。此外,通过对样品进行物相分析与微观结构分析, TiO₂的掺入明显改善了地质聚合物的微观结构,促进了碱激发反应,提高了材料的力学性能。

关键词: 煤气化粗渣, 碱激发, 地质聚合物, 力学性能, TiO₂, 改性, 微观结构

Abstract: Coal gasification slags can be divided into coarse slag and fine slag, which has potential application in alkali-activation field. The physical and chemical properties of coal gasification coarse slag were studied, and the geopolymer was prepared by using coal gasification coarse slag, meanwhile geopolymer modified by TiO₂ was studied. The results show that the mechanical properties of coal gasification coarse slag based geopolymer significantly improve by adding a certain amount of TiO₂. When 10.0% (mass fraction) TiO₂ is added, the 28 d compressive strength of the sample increases from 23.4 MPa to 42.9 MPa. In addition, through phase and microstructure analysis of the samples, the addition of TiO₂ significantly improves the microstructure of the geopolymer, promotes the alkali-activation reaction, and improves the mechanical properties of the material.

Key words: coal gasification coarse slag, alkali-activation, geopolymer, mechanical property, TiO₂, modification, microstructure

中图分类号:

TU52

张彤, 刘泽, 苏壮飞, 朱思雨. TiO₂改性煤气化粗渣基地质聚合物的微观结构与性能[J]. 硅酸盐通报, 2022, 41(2): 520-525.

ZHANG Tong, LIU Ze, SU Zhuangfei, ZHU Siyu. Microstructure and Properties of TiO₂ Modified Coal Gasification Coarse Slag Based Geopolymer[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(2): 520-525.

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TiO₂改性煤气化粗渣基地质聚合物的微观结构与性能

Microstructure and Properties of TiO₂ Modified Coal Gasification Coarse Slag Based Geopolymer

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