可溶性P<sub>2</sub>O<sub>5</sub>对超细硫铝酸盐水泥基双液注浆材料早期水化性能的影响及机理

doi:10.11896/cldb.23010125

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Abstract In order to guide the efficient application of phosphogypsum in ultra-fine sulfoaluminate cement-based double liquid grouting materials (SCBGM), the effect of soluble P₂O₅ on the early hydration performance of SCBGM at high water-cement ratio and its mechanism were studied. The results showed that the addition of soluble P₂O₅ did not significantly affect the setting time of SCBGM slurry. When the soluble P₂O₅ content was between 0% and 1.5%, the early strength of SCBGM increased with the increase of the soluble P₂O₅ content. At the optimum dosage of 1.5%, soluble P₂O₅ can significantly increase the amount of ettringite in early hydration of SCBGM, and also significantly optimize the distribution characteristics of ettringite in the hardened body, which changed from cluster shape to highly lapped staggered distribution, so as to achieve full potential of the strength skeleton effect of ettringite crystal.

Key words： soluble P₂O₅ sulfoaluminate cement grouting material hydration

Published: 10 October 2024 Online: 2024-10-23

CLC number:

TQ172.7

Fund:Key Public Welfare Special Project of Henan Province (201300311000),the Fund of the Henan Key Laboratory of Materials on Deep-Earth Engineering (MDE2019-03).

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	ZHANG Jianwu
	GUAN Xuemao
	WANG Xiao
	JIN Biao
	ZHANG Xiaoting

Cite this article:

ZHANG Jianwu,GUAN Xuemao,WANG Xiao, et al. Effect and Mechanism of Soluble P₂O₅ on the Early Hydration of Ultra-fine Sulfoaluminate Cement-based Double Liquid Grouting Materials[J]. Materials Reports, 2024, 38(19): 23010125-6.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.23010125 OR http://www.mater-rep.com/EN/Y2024/V38/I19/23010125

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