Dispersion properties of fly ash-slag powders under the different environment

被引：10

作者：

Zhang, Da-Wang ^{[1
]}

Zhao, Ke-Fei ^{[1
]}

Li, Hui ^{[1
]}

Wang, Dong-min ^{[2
]}

Wang, Lin-lin ^{[3
]}

Zhang, Guo-fang ^{[4
]}

机构：

[1] Xian Univ Architecture & Technol, Coll Mat Sci & Engn, Xian 710055, Peoples R China

[2] China Univ Min & Technol, Inst Concrete & Ecomat, Beijing 100083, Peoples R China

[3] CCTEG Chongqing Res Inst, Chongqing 400039, Peoples R China

[4] Tongji Univ, Minist Educ, Key Lab Adv Civil Engn Mat, Shanghai 201804, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 296卷

基金：

中国国家自然科学基金;

关键词：

Fly ash-slag powder; NaOH; Waterglass; Agglomerate structure; BLAST-FURNACE SLAG; RHEOLOGY; PASTES; REACTIVITY; ACTIVATOR; CONCRETE; STRENGTH; CEMENTS;

D O I：

10.1016/j.conbuildmat.2021.123649

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In this study, water, NaOH, and waterglass medium system are used to investigate the effect of different environment on the dispersion properties of fly ash-slag powder. Size distribution, Elongation, and Circularity of pastes was selected as the evaluate index to quantitatively investigate the dispersion properties of pastes by Morphologi G3 experiment. Results show that NaOH system has the highest size diameter of agglomerate structure with a diameter of 90-120 mu m, followed by waterglass system, and finally water has the lowest size diameter. Square-like and long-chain structure with long elongation and low circularity are the mainly components in the active medium system (NaOH and waterglass). This is related to the early reaction of pastes, especially dissolution process. High dissolution speed of aluminosilicate is useful to formation of chain agglomerate structure due to the high electrostatic repulsion to increase the contact chance of particles and particles. (C) 2021 Elsevier Ltd. All rights reserved.

引用

页数：10

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