蒸养条件下偏高岭土对钢渣水泥基复合体系水化的影响

doi:10.11896/cldb.21010187

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Abstract The effects of metakaolin on early hydration and mechanical properties of steam-cured steel slag blended cement-based materials (steam-cured at 60℃ for 12h) were investigated. The results show that, with the incorporation of metakaolin under the optimum dosage, the mechanical strength of steam-cured steel slag blended cement mortar is significantly enhanced, which is comparable to that of pure cement mortar. The early hydration process of steam-cured steel slag blended cement is accelerated with metakaolin, as well as the consumption of sulfate, lea-ding to the formation of AFm phases. The amount of C-S-H and C-A-S-H gel of steam-cured ternary Portland cement blends containing steel slag and metakaolin is increased while carbon aluminate is observed to fix active Al₂O₃, which is beneficial to the stability of ettringite. Additionally, the pore distribution of steel slag blended cement containing metakaolin under steam curing is refined, leading to a denser matrix.

Key words： steam-cured steel slag metakaolin cement hydration characteristic pore structure

Published: 10 March 2022 Online: 2022-03-08

CLC number:

TU528

Fund:National Natural Science Foundation of China (51778132) and the “333 Project” Funded by Jiangsu Province in 2020 (BRA2020221).

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	Articles by authors
	HUANG Shiyu
	HUO Binbin
	CHEN Chun
	ZHANG Yamei

Cite this article:

HUANG Shiyu,HUO Binbin,CHEN Chun, et al. The Influence of Metakaolin on the Hydration of Steam-cured Steel Slag Blended Cement[J]. Materials Reports, 2022, 36(5): 21010187-6.

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http://www.mater-rep.com/EN/10.11896/cldb.21010187 OR http://www.mater-rep.com/EN/Y2022/V36/I5/21010187

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