Bio-functionalization of metakaolin for better performance of metakaolin mortars

被引：3

作者：

Wang, Yonghui ^{[1
]}

Fang, Hu ^{[1
]}

Chen, Peiyuan ^{[1
,2
,3
]}

Pei, Chunning ^{[1
]}

Li, Jin ^{[1
]}

Shen, Xin ^{[1
]}

机构：

[1] Anhui Univ Sci & Technol, Sch Civil Engn & Architecture, Huainan 232001, Anhui, Peoples R China

[2] Anhui Univ Sci & Technol, State Key Lab Min Response & Disaster & Control De, Huainan 232000, Anhui, Peoples R China

[3] Anhui Hongchang New Mat Co Ltd, Huaibei 230001, Peoples R China

来源：

APPLIED CLAY SCIENCE | 2023年 / 245卷

基金：

中国国家自然科学基金;

关键词：

Bio-functionalization; Metakaolin; Pore structure; Compressive strength; Dispersion; CEMENT COMPOSITION; SILICA; HYDRATION; ADHESIVE; IMPACT; FRESH;

D O I：

10.1016/j.clay.2023.107161

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This study was conducted to investigate the influence of gallic acid (GA), the smallest molecular unit of tannic acid, on the performance of metakaolin (MK) mortars. GA was added directly as an admixture (Method I) or pre-mixed with MK (Method II) for bio-functionalization. Experimental results showed that GA improved the dispersion of MK by generating electrostatic repulsion and spatial site resistance between particles. The GA functionalization of MK by Method II displayed superior efficiencies in adjusting the fluidity of mortars owing to better dispersibility. The functionalization of MK by GA could enhance the pore filling effect resulting from the dispersed MK, and enable more products to be generated owing to the formation of GA similar to Ca intermediates, contributing refined pore structure and increased compressive strength to mortars. The compressive strength of MK mortars has been optimally increased by 13.0 - 18.0% when using 0.1% GA.

引用

页数：10

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