电石渣激发的无水泥超高强砂浆力学性能与微观结构特征

doi:10.11896/cldb.24070056

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Abstract In order to improve the economic and environmental benefits of cementless ultra-high performance concrete (UHPC), ground granulated blast furnace slag (GGBFS), silica fume (SF) or both were used as precursors, activated by calcium carbide residue to prepare a series of cementless mortars. The effect of precursors and curing regimes on compressive strength, hydration products and microstructure of cementless mortars was investigated. Results show that CCR activated GGBFS mortars obtained higher fluidity and compressive strength than CCR activated SF mortars. With addition of SF, the compressive strength of CCR activated GGBFS-SF mortars under combined curing reached 132.2 MPa. The pozzolanic reaction between Ca(OH)₂ provided by GGBFS hydration and CCR and SiO₂ provided by SF in the matrix was significantly acce-lerated by thermal curing, generated a large amounts of C-(A)-S-H gel and a small amounts tobermorite crystals and xonotlite crystals, reduced the porosity and helped the cementless mortar obtained ultra-high compressive strength.

Key words： ultra-high performance concrete (UHPC) cementless ultra-high strength mortar calcium carbide residue (CCR) thermal curing regimes

Published: 15 August 2025 Online: 2025-08-15

CLC number:

TU528.31

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	Articles by authors
	WANG Pengju
	PENG Yucheng
	DING Hong
	WANG Wei
	PENG Gaifei

Cite this article:

WANG Pengju,PENG Yucheng,DING Hong, et al. Mechanical Properties and Microstructure Characteristics of Cementless Ultra-high Strength Mortar Activated by Calcium Carbide Residue[J]. Materials Reports, 2025, 39(16): 24070056-9.

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https://www.mater-rep.com/EN/10.11896/cldb.24070056 OR https://www.mater-rep.com/EN/Y2025/V39/I16/24070056

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