Experimental Study on Chloride Ion Transport in Soda Residue Soil Based Partially-exposed Concrete Considering the Influence of Groundwater Level
WANG Yuanzhan1,*, YANG Minxin1, GONG Xiaolong2, WANG Yuchi3, GUO Shang1
1 National Key Laboratory of Water Conservancy Engineering Simulation and Security, Tianjin University, Tianjin 300072, China 2 Tianjin Port( Group) Co., Ltd., Tianjin 300461, China 3 Tianjin Research Institute for Water Transport Engineering, M.O.T, Tianjin 300456, China
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.
通讯作者:
王元战,天津大学建筑工程学院教授、博士研究生导师。1982年1月毕业于天津大学海洋工程专业,获学士学位;1984年9月毕业于天津大学水工结构专业,获硕士学位;1992年9月毕业于天津大学结构工程专业,获博士学位。1987年任天津大学讲师,1992年任天津大学副教授,1997年任天津大学教授。目前主要从事港口海岸与近海结构设计理论和方法、土与结构相互作用、结构振动分析理论和方法等方面的研究工作。发表论文100余篇,被国内外权威期刊收录,包括Construction and Building Materials、Geotechnique、Ocean Engineering、《岩土工程学报》《材料科学与工程学报》《材料科学与工艺》等。yzwang@tju.edu.cn
引用本文:
王元战, 杨旻鑫, 龚晓龙, 王禹迟, 郭尚. 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[J]. 材料导报, 2024, 38(7): 22010226-7.
WANG Yuanzhan, YANG Minxin, GONG Xiaolong, WANG Yuchi, GUO Shang. Experimental Study on Chloride Ion Transport in Soda Residue Soil Based Partially-exposed Concrete Considering the Influence of Groundwater Level. Materials Reports, 2024, 38(7): 22010226-7.
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2024, Vol. 38 
