涂覆时间对聚合物水泥基钢筋涂层粘接性能的影响机理

doi:10.11896/cldb.22060053

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Abstract To investigate the influence mechanism of the phase evolution of interfacial transition zone (ITZ) caused by the coating gelation process on the bonding properties of polymer-cement based coating and concrete protective layer, a coating with a mass ratio of 1∶2 between acrylate emulsion and P·O 52.5 cement was prepared, and the bonding strength of coated steel bar under different cementing time was tested. The microstructure and time-evolution characteristics of the ITZ components in reinforcement coating and protective coating were characterized. The results show that shorter resting time (＜3 h) is beneficial to the polymerization of polymer-cement based coating and calcium silicate hydrate (CSH) between the ITZ, and then improve the bonding properties of coated steel bars.

Key words： polymer cement-based coating interfacial transition zone (ITZ) bonding strength of steel bars CSH microscope analysis

Published: 10 September 2024 Online: 2024-09-30

CLC number:

TB37

Fund:National Key Research and Development Program of China (2021YFB2600704), National Natural Science Foundation of China (52109161), and Water Conservancy Technology Program of Xinyi River Hydro-junction Project (HKZJG-KY-01).

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	Articles by authors
	HU Jiayu
	XU Fei
	QIAN Wenxun
	XIAO Huaiqian
	GE Jinyu
	LI Jiaming

Cite this article:

HU Jiayu,XU Fei,QIAN Wenxun, et al. Mechanism of Resting Time on Bond Performance of Polymer Cement-based Coating on Steel Bar[J]. Materials Reports, 2024, 38(17): 22060053-4.

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http://www.mater-rep.com/EN/10.11896/cldb.22060053 OR http://www.mater-rep.com/EN/Y2024/V38/I17/22060053

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