Study on the Effect and Mechanism of Excitation Modes on the Activity of Recycled Brick Micropowder

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Study on the Effect and Mechanism of Excitation Modes on the Activity of Recycled Brick Micropowder

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[1]YUAN Chengfang,CHEN Yang,WANG Shibo,et al.Study on the Effect and Mechanism of Excitation Modes on the Activity of Recycled Brick Micropowder[J].Journal of Zhengzhou University (Engineering Science),2022,43(06):97-103.[doi:10.13705/j.issn.1671-6833.2022.06.005]

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 43卷 Number of periods: 2022 06 Page number: 97-103 Column: Public date: 2022-09-02

Title:: Study on the Effect and Mechanism of Excitation Modes on the Activity of Recycled Brick Micropowder

Author(s):: YUAN Chengfang¹; CHEN Yang¹; WANG Shibo²; WEI Yiran¹; 1.School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China;
2.Henan Urban Construction Civil Structure Engineering Research Center Co., Ltd., Zhengzhou 450000, China

Keywords:: recycled brick micropowder; activation excitation; microanalysis; mechanism; activity index

CLC:: TU528. 1；X798

DOI:: 10.13705/j.issn.1671-6833.2022.06.005

Abstract:: The recycled micropowder formed by crushing and ball milling waste clay bricks has potential activity. It can partially replace cement to prepare concrete through activation excitation, so as to realize the reuse of waste resources. This study explored the excitation effect of mechanical excitation, chemical excitation and high temperature excitation on the activity of recycled brick micropowder, and SEM and XRD technology analysis were used to reveal the material microstructure and mechanism of action. The results showed that after using mechanical excitation, chemical excitation, and high temperature excitation to activate the regenerated micropowder, the activity index of the material was improved to varying degrees, and there was a good correlation between different excitation methods and the activity index. Among them, the 45 min mechanical excitation of ball milling and the high temperature excitation of 800 ℃ had better effects, with the highest activity index reaching 71%, and the highest activity index in the chemical excitation mode was 65%. Considering the excitation effect, energy consumption, economy and practical operation feasibility, it is recommended to use ball milling for 45 min as the best activation method for recycled brick micropowder.

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Last Update: 2022-10-03