Abstract
In order to study the strength and chloride, ion diffusion characteristics of fly ash fill material under the action of chloride salt erosion and dry–wet cycles were investigated. Using both X-ray diffraction and scanning electron microscopy analyses, the microstructural changes of the material were analyzed. Subsequently, the material damage and deterioration mechanisms were verified. The results indicate that both the strength and elastic modulus of the material increase first and then rapidly decrease. The chloride ions diffuse rapidly in the initial stage and then diffuse gradually into the deep part of the material in the later stage. Under the action of dry–wet cycles, the chloride ions accelerate and accumulate inside. Based on the microstructural analysis, the fill material deterioration process can be roughly divided into three stages, namely erosion benefit, damage accumulation, and deterioration and instability stages. The material deterioration accelerates under the action of dry–wet cycles, leading to instability and destruction of the fill body.
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This research was funded by the SDUST Research Fund (grant 2018TDJH102).
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Responsible Editor: Murat Karakus
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Li, H., Liu, Y., Wu, H. et al. Deterioration mechanisms of fill material under the action of chlorine salt erosion and dry–wet cycles. Arab J Geosci 14, 1372 (2021). https://doi.org/10.1007/s12517-021-07811-y
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DOI: https://doi.org/10.1007/s12517-021-07811-y