碳化再生微粉对碱激发矿渣材料的影响

doi:10.16552/j.cnki.issn1001-1625.2024.0818

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (1): 289-296.DOI: 10.16552/j.cnki.issn1001-1625.2024.0818

碳化再生微粉对碱激发矿渣材料的影响

李琪¹, 王亮¹, 王浩², 王成龙¹, 徐建¹, 胡伟¹

1.安徽理工大学土木建筑学院,淮南 232001;
2.安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室,淮南 232001

收稿日期:2024-07-15 修订日期:2024-09-18 出版日期:2025-01-15 发布日期:2025-01-23
通信作者: 王浩,博士,讲师。E-mail:haowang@aust.edu.cn
作者简介:李琪(1999—),男,硕士研究生。主要从事建筑固废利用的研究。E-mail:1277102754@qq.com
基金资助:
安徽理工大学引进人才科研启动基金(2023yjrc78);国家自然科学基金青年基金项目(52108187);安徽省高等学校科学研究项目(2023AH040156)

Effect of Carbonated Recycled Concrete Powder on Alkali-Activated Slag Materials

LI Qi¹, WANG Liang¹, WANG Hao², WANG Chenglong¹, XU Jian¹, HU Wei¹

1. School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China;
2. Stake Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, China

Received:2024-07-15 Revised:2024-09-18 Published:2025-01-15 Online:2025-01-23

摘要/Abstract

摘要： 为促进再生微粉(RCP)在碱矿渣(AAS)材料中的应用,本文利用碳化技术对RCP进行提质处理并用RCP替代10%～40％(质量分数,下同)粒状高炉矿渣(GBFS)制备AAS砂浆,探究碳化再生微粉(CRCP)掺量对AAS砂浆水化性能、力学强度及微结构的影响。结果表明:CRCP的主要成分为细尺寸碳酸钙和硅胶,具有较高的吸水率,能降低AAS砂浆的流动度;CRCP可通过填充效应和活性效应促进GBFS水化,改善AAS砂浆的堆积密度和孔结构,从而增强抗压强度;当CRCP掺量为20%时,AAS砂浆的抗压强度具有最优值,高出未处理RCP约16%～20%。

关键词: 再生微粉, 碳化处理, 碱激发矿渣, 抗压强度, 孔结构

Abstract: In order to promote the application of recycled concrete powder (RCP) in alkali-activated slag (AAS) materials, this paper uses carbonization technology to improve the quality of RCP and replaces 10%~40% (mass fraction, the same below) granulated blast furnace slag (GBFS) with RCP to prepare AAS mortar. The effect of the dosage of carbonated recycled concrete powder (CRCP) on the hydration performance, mechanical strength, and microstructure of AAS mortar was investigated. The results show that main components of CRCP are fine-sized calcium carbonate and silica gel, which have high water absorption and can reduce the fluidity of AAS mortar. CRCP can promote hydration of GBFS by filling and activity effects, improving the packing density and pore structure of AAS mortar, thereby increasing compressive strength. It is observed that when CRCP content reaches 20%, the resulting AAS mortar exhibits an optimal compressive strength approximately 16%~20% higher than that achieved with non-carbonated RCP.

Key words: recycled concrete powder, carbonization, alkali-activated slag, compressive strength, pore structure

中图分类号:

TU528.09

李琪, 王亮, 王浩, 王成龙, 徐建, 胡伟. 碳化再生微粉对碱激发矿渣材料的影响[J]. 硅酸盐通报, 2025, 44(1): 289-296.

LI Qi, WANG Liang, WANG Hao, WANG Chenglong, XU Jian, HU Wei. Effect of Carbonated Recycled Concrete Powder on Alkali-Activated Slag Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(1): 289-296.

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碳化再生微粉对碱激发矿渣材料的影响

Effect of Carbonated Recycled Concrete Powder on Alkali-Activated Slag Materials

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