二氧化碳浓度对低钙固碳胶凝材料性能影响及机理研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (9): 3109-3116.

二氧化碳浓度对低钙固碳胶凝材料性能影响及机理研究

黎帅^1,2, 周凤娇², 谭新宇², 张宾², 林永权², 陶从喜², 黄明俊¹

1.华南理工大学前沿软物质学院,广州 510000;
2.华润水泥技术研发有限公司,广州 510000

收稿日期:2023-04-26 修订日期:2023-06-19 出版日期:2023-09-15 发布日期:2023-09-14
作者简介:黎帅(1992—),男,博士,工程师。主要从事碳吸收胶凝材料的开发及应用。E-mail:475615710@qq.com
基金资助:
中国科学技术协会青年托举人才工程项目(CRC-2022-K-17);“十四五”国家重点研发计划(2021YFB3802001)

Effect of Carbon Dioxide Concentration on Performance of Low-Calcium Carbon Sequestration Cementitious Materials and Its Mechanism

LI Shuai^1,2, ZHOU Fengjiao², TAN Xinyu², ZHANG Bin², LIN Yongquan², TAO Congxi², HUANG Mingjun¹

1. School of Emergent Soft Matter, South China University of Technology, Guangzhou 510000, China;
2. China Resources Cement Technology R & D Co., Ltd., Guangzhou 510000, China

Received:2023-04-26 Revised:2023-06-19 Online:2023-09-15 Published:2023-09-14

摘要/Abstract

摘要： 为了实现建材行业的“碳达峰、碳中和”目标,使用工业钙质原料和硅质原料在1 350 ℃制备了一种低钙固碳胶凝材料,研究了不同CO₂浓度养护对低钙固碳胶凝材料碳化程度和碳化后性能的影响,并通过X射线衍射(XRD)、傅里叶红外光谱分析(FT-IR)、热重分析(TG)、扫描电子显微镜(SEM)、电子探针(EPMA)等测试手段进行了低钙固碳胶凝材料碳化后的产物分析、微观分析和机理分析。结果表明,随着CO₂浓度的提高,低钙固碳胶凝材料的碳化程度和抗压强度显著提高,当CO₂浓度为99.99%(体积分数)时,低钙固碳胶凝材料碳化8 h后的抗压强度为132.2 MPa,与CO₂浓度为25%时相比,抗压强度提高了260%。

关键词: 低钙固碳胶凝材料, CO₂浓度, 碳酸钙, 碳化程度, 抗压强度

Abstract: In order to achieve the national strategic goals of “peak carbon dioxide emission and carbon neutrality” in the building materials industry, a type of low-calcium carbon sequestration cementitious materials (LC-CSCM) was prepared by calcining industrial calcareous and siliceous raw materials at 1 350 ℃. The influences of different concentrations of CO₂ on the carbonation degree and the carbonation hardening performance of LC-CSCM were investigated. XRD, FT-IR, TG, SEM and EPMA were used for the evolution of product analysis, microanalysis and mechanism analysis of carbonated LC-CSCM. The results show that with the increase of CO₂ concentration, the carbonation degree and the carbonation hardening performance of LC-CSCM increase significantly. When the CO₂ concentration is 99.99% (volume fraction), the compressive strength reaches 132.2 MPa after 8 h of LC-CSCM carbonation curing; compared with the concentration CO₂ of 25%, the compressive strength increases by 260%.

Key words: low-calcium carbon sequestration cementitious material, carbon dioxide concentration, calcium carbonate, carbonation degree, compressive strength

中图分类号:

TQ172

黎帅, 周凤娇, 谭新宇, 张宾, 林永权, 陶从喜, 黄明俊. 二氧化碳浓度对低钙固碳胶凝材料性能影响及机理研究[J]. 硅酸盐通报, 2023, 42(9): 3109-3116.

LI Shuai, ZHOU Fengjiao, TAN Xinyu, ZHANG Bin, LIN Yongquan, TAO Congxi, HUANG Mingjun. Effect of Carbon Dioxide Concentration on Performance of Low-Calcium Carbon Sequestration Cementitious Materials and Its Mechanism[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(9): 3109-3116.

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