生石灰-碳酸钠掺量和矿渣活性对碱矿渣砂浆抗裂性能的影响

doi:10.11896/cldb.21030241

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Abstract Alkali-activated slag mortar was prepared using quicklime and sodium carbonate (the molar ratio of 1∶1) as activators. The effect of quicklime and sodium carbonate content (namely Na₂O content, 2.5%, 4.5%, 6.5% and 8.5%) and slag activity (depending on the chemical composition and fineness, etc.) on the splitting tensile strength, strain of interior steel ring, circumferential tensile stress and cracking resistance of alkali-activated slag mortars (AM) was investigated. It is found that the cracking resistance of Portland cement mortars is better than that of AM; with the increase of Na₂O content, the splitting tensile strength and cracking resistance increase firstly and then decrease. When the Na₂O content is 6.5%, the cracking resistance is the best; with the increase of slag activity, the splitting tensile strength of AM increases, but its cracking resistance decreases.

Key words： quicklime sodium carbonate slag activity alkali-activated slag mortar cracking resistance

Published: 25 August 2022 Online: 2022-08-29

CLC number:

TU528

Fund:National Natural Science Foundation of China (51878179) and Natural Science Foundation of Fujian Province (2021J02021).

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	Articles by authors
	ZHAO Xiaowen
	ZHANG Jianmei
	CHEN Xudong
	JI Tao

Cite this article:

ZHAO Xiaowen,ZHANG Jianmei,CHEN Xudong, et al. Effects of Quicklime-Sodium Carbonate Content and Slag Activity on Cracking Resistance of Alkali-activated Slag Mortar[J]. Materials Reports, 2022, 36(16): 21030241-5.

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http://www.mater-rep.com/EN/10.11896/cldb.21030241 OR http://www.mater-rep.com/EN/Y2022/V36/I16/21030241

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