Hydrophobicity of the material surface is one of the most valuable properties, and it is also used as one of the deterioration indices of materials. This surface property changes depending on different parameters, such as temperature, surface roughness, measurement time, etc. In this paper, using silicone rubber and concrete as the samples, the effect of parameters to the evaluation of hydrophobic condition is studied. Based on the results of this research, the deterioration condition or the water absorption condition of the material surfaces were quantitatively evaluated more accurately. By using the quantitative evaluation and the diagnostic techniques, these parameters can improve the reliability of the surface condition evaluation of the materials.
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