考虑地下水位影响的碱渣土地基半埋混凝土内氯离子传输试验研究

doi:10.11896/cldb.22010226

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Abstract The durability of reinforced concrete structure in soda residue soil environment lacks relevant research results, which is a subject to be further studied. In order to explore the chloride ion transmission law in concrete buried in soda residue soil, this work simulated the real soda residue soil base and groundwater erosion environment and designed three groundwater levels of -0.2 m, -0.5 m and -0.8 m. The chloride ion natural diffusion test of the partially-exposed concrete in soda residue soil was carried out to explore the chloride ion distribution law of concrete surface adsorption area and underground area under different groundwater level environment. The results show that the chloride ion concentration in surface adsorption area is higher than that in the underground area due to its evaporation concentration and capillarity. The chloride concentration shows a great difference with the change of the groundwater level. The chloride concentration in surface adsorption area shows a downward trend with the increase of groundwater level. The influence of the groundwater level in underground area mainly reflects in the relative position between the concrete and the water level. The chloride concentration in the area below the groundwater level is higher than that above it. On this basis, the chloride ion transmission mechanism in soda residue soil based partially-exposed concrete is explored and the influence of groundwater level on surface chloride ion concentration and diffusion coefficient is quantitatively studied based on Fick’s second law and establish a time-varying model of chloride ion transport considering the influence of groundwater level. The model can provide technical support for quantitative evaluation of chloride ion concentration in concrete under different soda residue erosion environment and prediction of service life in practical engineering.

Key words： soda residue soil partially-exposed concrete chloride ion transmission groundwater level durablity

Published: 10 April 2024 Online: 2024-04-11

CLC number:

TU528

Fund:National Natural Science Foundation of China (51979191) and Tianjin Port Science and Technology Plan Project(2020-165).

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	Articles by authors
	WANG Yuanzhan
	YANG Minxin
	GONG Xiaolong
	WANG Yuchi
	GUO Shang

Cite this article:

WANG Yuanzhan,YANG Minxin,GONG Xiaolong, et al. Experimental Study on Chloride Ion Transport in Soda Residue Soil Based Partially-exposed Concrete Considering the Influence of Groundwater Level[J]. Materials Reports, 2024, 38(7): 22010226-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22010226 OR http://www.mater-rep.com/EN/Y2024/V38/I7/22010226

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