Impact of Sealants on the Waterproof Performance of Hydraulic Concrete Coatings
This study aims to evaluate the permeability and waterproof performance of silane-based penetrating sealant(PS),two cement-based coatings(CC1 and CC2),and a polymer coating(PC)on the surface of concrete,and to explore the relationship between water vapor transmission rate and waterproof performance.The experiment used 100 mm concrete cubes as test subjects,comparing the performance of various sealants and coatings under identical conditions to assess their impact on the waterproof performance and water vapor transmission capability of concrete.The results showed that the cement-based coating CC2 performed the best in reducing water vapor transmission rate,while also exhibiting the highest waterproof performance.In contrast,the cement-based coating CC1 had the highest water vapor transmission rate and the lowest waterproof performance.The penetrating sealant PS showed higher permeability and poorer waterproof performance.The polymer coating PC demonstrated excellent performance in both permeability and waterproof capability.Furthermore,the study found a significant correlation between the water vapor transmission rate and the waterproof performance of the coating systems,providing important insights for predicting and evaluating the performance of coatings.
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