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废弃混凝土再生微粉物理化学联合活化研究

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Study on combined physical and chemical activation of recycled powder from waste concrete

期刊信息

合肥工业大学（自然科学版），2024年9月，第47卷第9期：1275-1280，1287

DOI: 10.3969/j.issn.1003-5060.2024.09.018

作者信息

熊科兴 $ ^{1,2,3,4} $，詹炳根 $ ^{1,2,3,4} $，王存 $ ^{1,2,3,4} $，卞朋飞 $ ^{1,2,3,4} $，周耀宗 $ ^{1,2,3,4} $，余其俊 $ ^{1,2,3,4} $

(1. 合肥工业大学 土木与水利工程学院, 安徽 合肥 230009; 2. 水泥基材料低碳技术与装备教育部工程研究中心, 安徽 合肥 230009; 3. 安徽省水泥基材料低碳技术工程研究中心, 安徽 合肥 230009; 4. 土木工程结构与材料安徽省重点实验室, 安徽 合肥 230009)

摘要和关键词

摘要: 针对再生微粉活性低、不能高效利用的问题,在物理研磨和化学激发2种单一活化方式的研究基础上,文章探究物理化学联合活化方式对再生微粉活性的影响效果。结果表明,物理化学联合活化活性指数可提升14.7%,较单一活化方式活性提升效果显著,再生微粉经过机械研磨后,结构表面缺陷增多,促进了活性成分的溶出,进一步增加了化学激发剂与再生微粉发生反应的效率,促进试样中生成较多能够提高试件强度的C-S-H和C-A-S-H等凝胶物相。

关键词: 再生微粉；活性指数；联合活化；活化原理 中图分类号：TU528.1 文献标志码：A 文章编号：1003-5060（2024）09-1275-07

Authors

XIONG Kexing $ ^{1,2,3,4} $, ZHAN Binggen $ ^{1,2,3,4} $, WANG Cun $ ^{1,2,3,4} $, BIAN Pengfei $ ^{1,2,3,4} $, ZHOU Yaozong $ ^{1,2,3,4} $, YU Qijun $ ^{1,2,3,4} $

(1. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China; 2. Engineering Research Center of Low-carbon Technology and Equipment for Cement-based Materials of Ministry of Education, Hefei 230009, China; 3. Anhui Province Engineering Research Center of Low-carbon Technology for Cement-based Materials, Hefei 230009, China; 4. Anhui Key Laboratory of Civil Engineering Structures and Materials, Hefei 230009, China)

Abstract and Keywords

Abstract: In view of the low activity of recycled powder and its inefficient utilization, this paper explores the effect of combined physical and chemical activation on the activity of recycled powder based on the study of physical grinding and chemical activation. The results showed that the activity index of combined physical and chemical activation could be increased by 14.7%, which was significantly more effective than the single activation method. After mechanical grinding, the structure surface defects of the recycled powder increased, which promoted the dissolution of the active ingredients, further increased the efficiency of the reaction between the chemical activator and the recycled powder, and promoted the formation of more gel phases such as C-S-H and C-A-S-H in the sample that could improve the strength of the sample.

Keywords: recycled powder; activity index; combined activation; activation principle

基金信息

国家重点研发计划资助项目（2020YFC1909902）

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