Yoo Kyung Suk, Jang Seung Yup, Lee Kwang-Myong
Department of Transportation System Engineering, Graduate School of Transportation, Korea National University of Transportation, 157, Chuldo-bangmulgwan-ro, Uiwang 16106, Korea.
Department of Civil, Architectural, and Environmental Systems Engineering, Sungkyunkwan University (SKKU) 2066, Seobu-ro, Jangan-gu, Suwon 16419, Korea.
Materials (Basel). 2021 May 12;14(10):2501. doi: 10.3390/ma14102501.
This study proposed a method of applying coating on uncracked surfaces of test specimens in the electrical migration-diffusion test for the evaluation of the chloride penetration resistance of cracked cement-based composites. It was shown that, by applying the proposed method, the recovery of the chloride penetration resistance from self-healing of cracks can be evaluated more accurately because the application of surface coating reduces the test time and the error introduced by over-simplification. Based on observations of the self-healing-induced recovery of chloride penetration resistance, a phenomenological model for predicting the progress of crack self-healing in cement-based composites was suggested. This model is expected to evaluate the chloride penetration resistance more accurately in actual concrete structures with cracks.
本研究提出了一种在电迁移 - 扩散试验中对试件未开裂表面施加涂层的方法，用于评估开裂水泥基复合材料的抗氯离子渗透性能。结果表明，通过应用该方法，可以更准确地评估裂缝自愈合后抗氯离子渗透性能的恢复情况，因为表面涂层的应用减少了试验时间以及过度简化所引入的误差。基于对裂缝自愈合引起的抗氯离子渗透性能恢复的观察，提出了一个用于预测水泥基复合材料裂缝自愈合过程的唯象模型。该模型有望在实际有裂缝的混凝土结构中更准确地评估抗氯离子渗透性能。
