基于分形维数的硫酸盐环境下混凝土抗蚀系数及微观机理研究

doi:10.11896/cldb.24020033

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Abstract In order to study the effect of sulphate environment on the performance of concrete, indoor sulphate corrosion test which simulated the on-site engineering corrosive environment in Xinjiang Taitama Lake area was carried out. From the perspective of concrete macroscopic corrosion resistance coefficient, microscopic pore structure and the evolution of corrosion products with the erosion time and other perspectives, and the pore structure of concrete fractal dimension calculation, analysed the relationship between fractal dimension, porosity and corrosion resistance coefficient. The results show that with the growth of corrosion time, the corrosion resistance coefficient is first enhanced and then weakened;the total porosity first decreases and then increases, the harmful pore and multi-harmful pore ratio first reduces and then increases. The porosity and corrosion resistance coefficient have a linear relationship. Fractal dimension is related to the pore size, at the pre-erosion, the pore structure of concrete is refined, the compactness of the concrete increases, the distribution of pore space is complex, fractal dimensions increase. When the expansion effect of calcium alumina, gypsum and other expansive corrosion products occurs, the internal pore structure of concrete is coarsened, the pore distribution is simple, and the fractal dimension decreases. Through the analysis of XRD erosion products, it is found that the expansion of calcium alumina and gypsum is the main reason for the deterioration of the concrete, and calcium alumina erosion mainly occurs in the early stage of erosion, and gypsum erosion mainly occurs in the late stage of erosion. The research results can provide some references for the corrosion resistance of concrete in the salty soil area of Northwest China.

Key words： sulfate attack coefficient of corrosion resistance nuclear magnetic resonance pore structure fractal dimension

Published: 10 April 2025 Online: 2025-04-10

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TU528

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	Articles by authors
	YANG Junzhao
	ZHANG Rongling
	XUE Yanjin
	WANG Xiaoping
	DOU Xiaozheng
	SONG Yi

Cite this article:

YANG Junzhao,ZHANG Rongling,XUE Yanjin, et al. Study on Corrosion Resistance Coefficient and Micro-mechanism of Concrete Under Sulphate Environment Based on Fractal Dimension[J]. Materials Reports, 2025, 39(7): 24020033-7.

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https://www.mater-rep.com/EN/10.11896/cldb.24020033 OR https://www.mater-rep.com/EN/Y2025/V39/I7/24020033

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