碱-矿渣-偏高岭土基地聚物与骨料的界面粘结机理

doi:10.11896/cldb.23110101

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Abstract Geopolymer concrete, formed through alkaline activation, has an internal alkaline concentration of dozens times higher than that of cement. Therefore, the reaction properties between geopolymers and aggregates need to be explored further. This work discussed in detail the influence of different mix ratios and aggregate types on the interface bonding strength of the alkali-slag-metakaolin based geopolymer and aggregate . Microscopic analysis methods were used to elucidate the interface bonding mechanism. The experimental results showed that under the conditions of an alkali module of 1.2, and a liquid-to-solid ratio of 0.4, the samples with granite, basalt, and limestone respectively got the highest bonding strength. As the modulus of the alkaline activator and the liquid-to-solid ratio increased, the bonding strength of the interface decreased gradually;however, the bond strength between the geopolymer and granite was not significantly affected by the alkalinity of the activator. Under the action of the alkaline activator, three kinds of aggregates underwent dissolution reactions, and the dissolved active Si, Al, and Ca elements should react with the geopolymer further at the interface, which should improve the compactness of the ITZ.

Key words： geopolymer aggregate interface transition zone bonding strength bonding mechanism

Published: 10 January 2025 Online: 2025-01-10

CLC number:

TU528.41

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	Articles by authors
	CUI Chao
	LI Yuan
	DANG Yingze
	WANG Lan
	PENG Hui

Cite this article:

CUI Chao,LI Yuan,DANG Yingze, et al. Mechanism of Interface Bonding Between Alkali-Slag-Metakaolin Based Geopolymer and Aggregates[J]. Materials Reports, 2025, 39(1): 23110101-8.

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https://www.mater-rep.com/EN/10.11896/cldb.23110101 OR https://www.mater-rep.com/EN/Y2025/V39/I1/23110101

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