Preprint Article Version 1 This version is not peer-reviewed

Influence of FA Content on Mechanical and Hydration Properties of Alkali-Activated Ground Granulated Blast Furnace Slag Cements

Yun peng Liu
,
Zhen bo Fu
,
Xi hao Yang
,
Yi meng Zhao
,
Bing han Li
,
Da Xu
,
Shi ge Yu
,
Zhi yu Yao
,
Zhi bin Sun
,
Zhi lu Zhen
,
Xinfeng Ouyang
,
Yang yang Zong
,
Wen di Tian
,
Hai Yu
,
Shu li Zhao
* ,
Yen Wei
* ,
Kang min Niu
*
Version 1 : Received: 14 August 2024 / Approved: 14 August 2024 / Online: 14 August 2024 (08:21:20 CEST)

How to cite: Liu, Y. P.; Fu, Z. B.; Yang, X. H.; Zhao, Y. M.; Li, B. H.; Xu, D.; Yu, S. G.; Yao, Z. Y.; Sun, Z. B.; Zhen, Z. L.; Ouyang, X.; Zong, Y. Y.; Tian, W. D.; Yu, H.; Zhao, S. L.; Wei, Y.; Niu, K. M. Influence of FA Content on Mechanical and Hydration Properties of Alkali-Activated Ground Granulated Blast Furnace Slag Cements. Preprints 2024, 2024081026. https://doi.org/10.20944/preprints202408.1026.v1 Liu, Y. P.; Fu, Z. B.; Yang, X. H.; Zhao, Y. M.; Li, B. H.; Xu, D.; Yu, S. G.; Yao, Z. Y.; Sun, Z. B.; Zhen, Z. L.; Ouyang, X.; Zong, Y. Y.; Tian, W. D.; Yu, H.; Zhao, S. L.; Wei, Y.; Niu, K. M. Influence of FA Content on Mechanical and Hydration Properties of Alkali-Activated Ground Granulated Blast Furnace Slag Cements. Preprints 2024, 2024081026. https://doi.org/10.20944/preprints202408.1026.v1

Abstract

This study primarily investigates the effect of fly ash (FA) content on the mechanical properties and hydration performance of alkali-activated ground granulated blast furnace slag cements (AAGC), and compares the related properties with ordinary Portland cement (OPC). Additionally, the study examined the hydration products, thermal analysis, MIP, SEM, chemically bound water, and pH values of AAGC. The compressive strength of AAGC showed a retrogression phenomenon from 3 to 28 days, with the 14-day and 28-day compressive strengths of AAGC being higher than those of OPC. The AAGC with 20% FA content exhibits the highest 28-day compressive strength (75 MPa). The hydration heat release rate curved of OPC and AAGC can be divided into the initial induction period, induction period, acceleration period, deceleration period and steady period. As FA content increases, the 28-day pore volume of AAGC increased while pH values and chemically bound water decrease. SEM images of AAGC with low FA content showed more microcracks.

Keywords

FA; GGBFS; mechanical properties; hydration properties; pore structure; pH values; chemically bound water

Subject

Chemistry and Materials Science, Materials Science and Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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