TY - JOUR
T1 - Effects of Solid Activator and Fly Ash on Rheology and Thixotropy of One-Part Alkali-Activated Pastes
AU - Alrefaei, Yazan
AU - Wang, Yan Shuai
AU - Qian, Ye
AU - Dai, Jian Guo
N1 - Funding Information:
The first author would like to sincerely thank the Hong Kong Ph.D. Fellowship Scheme (HKPFS) offered by the Research Grants Council (RGC) of Hong Kong for sponsoring his Ph.D. study. The authors acknowledge the financial support received from the Hong Kong RGC General Research Fund (Project no. 15223120), National Natural Science Foundation of China (NSFC) (Project code: 51638008), and Hong Kong SAR Innovative Technology Fund (Project code: ITS/009/17).
Publisher Copyright:
Copyright © 2022 Japan Concrete Institute
PY - 2022/3
Y1 - 2022/3
N2 - Compared with conventional two-part alkali-activated materials (AAMs), one-part AAMs have several advantages, especially the simple production using only water similar to ordinary Portland cement. However, one-part AAMs are much less researched, especially in terms of rheology. Understanding the rheological behavior of such binders is a crucial step for their production, placement, and application in the construction industry. This paper studies the rheological properties of one-part AAMs through evaluating the dynamic yield stress, static yield stress, and thixotropic index. The effects of solid activator content, besides the effect of two types of fly ash (containing different amounts of carbonaceous impurities) with varying contents, are explored. The possible mechanisms are also discussed.
AB - Compared with conventional two-part alkali-activated materials (AAMs), one-part AAMs have several advantages, especially the simple production using only water similar to ordinary Portland cement. However, one-part AAMs are much less researched, especially in terms of rheology. Understanding the rheological behavior of such binders is a crucial step for their production, placement, and application in the construction industry. This paper studies the rheological properties of one-part AAMs through evaluating the dynamic yield stress, static yield stress, and thixotropic index. The effects of solid activator content, besides the effect of two types of fly ash (containing different amounts of carbonaceous impurities) with varying contents, are explored. The possible mechanisms are also discussed.
UR - http://www.scopus.com/inward/record.url?scp=85128299288&partnerID=8YFLogxK
U2 - 10.3151/jact.20.139
DO - 10.3151/jact.20.139
M3 - Journal article
AN - SCOPUS:85128299288
SN - 1346-8014
VL - 20
SP - 139
EP - 151
JO - Journal of Advanced Concrete Technology
JF - Journal of Advanced Concrete Technology
IS - 3
ER -