混凝土表面喷涂类有机无机杂化抗碳化剂制备及性能

doi:10.11896/cldb.23060104

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Abstract In order to improve the carbonation resistance and prolong the service life of concrete, this study prepared an organic-inorganic hybridanti-carbonation agent (OCCA) and investigated its effect on mechanical properties, anti-carbonation properties and impermeability of mortar. Furthermore, the interaction mechanism between OCCA and hardened cement pastes was analyzed. The results show that when the mass fraction of the reactive component of the self-designed OCCA is 1.2%, the carbonation area can be reduced by 33.6% compared with the blank group, the water absorption rate decreased by 23.7%, at the same time, the total porosity decreased from 10.56% to 7.17%,and the penetration height of the spray group is 58.6% of the blank group. Moreover, the 7-day compressive strength of the blocks coated with the OCCA increased by 6.1% compared to the blank group. At this ratio, the XRD and SEM analyses of the cement paste block reveal that the reactive components of OCCA can effectively infiltrate the cement paste and interact with the calcium hydroxide present in the concrete. This reaction gives rise to an insoluble crystalline substance that fills up the pores and cracks, so as to improve the carbonation resistance, water-resistance and impermeability of concrete.

Key words： organic-inorganic hybridization permeable crystallization anti-carbonation water impermeability

Published: 10 November 2024 Online: 2024-11-11

CLC number:

TU528

Fund:National Natural Science Foundation of China (52072171).

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	Articles by authors
	YE Mengxuan
	GU Leilei
	ZHANG Mei
	WANG Qianqian

Cite this article:

YE Mengxuan,GU Leilei,ZHANG Mei, et al. Preparation and Properties of Organic-Inorganic Hybrid Anti-carbonation Agent for Spraying Concrete Surface[J]. Materials Reports, 2024, 38(21): 23060104-7.

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http://www.mater-rep.com/EN/10.11896/cldb.23060104 OR http://www.mater-rep.com/EN/Y2024/V38/I21/23060104

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