Research on the influence law of Frost Resistance and Chloride Ion Corrosion Resistance of Tunnel Lining Concrete in Alpine Region

2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA) Pub Date : 2021-11-12 DOI:10.1109/ISTTCA53489.2021.9654755

Libin Lin, Yixin Wang, Xiaoyan Li, Jiliang Wang, Song Xiao

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Abstract

To effectively improve cold regions tunnel lining concrete frost resistance and good performance of resistance to chlorine salt erosion, etc, through indoor test, analyzed the certain dosage range of fly ash or GGBS for tunnel lining concrete frost resistance and the influence law of the chlorine salt erosion resistance, further analysis of the lining concrete antifreeze performance associated with the chlorine salt erosion resistance of the contact. The research results show that adding proper amount of fly ash or slag powder can improve the concrete resistance to freeze-thaw damage and corrosion resistance to chlorine salt, 30% 25% fly ash or slag concrete has excellent resistance to freeze-thaw damage and the chlorine salt erosion resistance ability, and these two kinds of mineral admixture affect the performance of concrete durability related laws. The improvement of inner compactness of lining concrete is the main reason for this phenomenon.

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高寒地区隧道衬砌混凝土抗冻、抗氯离子腐蚀影响规律研究

为有效提高寒冷地区隧道衬砌混凝土的抗冻性能和良好的抗氯盐侵蚀性能等，通过室内试验，分析了一定掺量范围内粉煤灰或GGBS对隧道衬砌混凝土抗冻性能及抗氯盐侵蚀性能的影响规律，进一步分析了衬砌混凝土防冻性能与抗氯盐侵蚀性能的关联关系。研究结果表明，掺加适量粉煤灰或矿渣粉可提高混凝土抗冻融损伤和抗氯盐腐蚀能力，30% - 25%粉煤灰或矿渣混凝土具有优异的抗冻融损伤和抗氯盐侵蚀能力，且这两种矿物掺合料影响混凝土耐久性性能的相关规律。衬砌混凝土内部密实度的提高是造成这种现象的主要原因。

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2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)

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