Measuring apparatus for evaluating surface hydrophobicity of concrete and measuring method thereof

Abstract

The invention discloses a measuring apparatus for evaluating surface hydrophobicity of concrete. A back and forth spiral guide rail is arranged on a pedestal in an axial direction, an elevating support is arranged on the back and forth spiral guide rail, and an objective table is arrange on the upper end of the elevating support; a front support is arranged at the front of the pedestal, a vertical adjusting support is fixed at the end part of the front support, a first horizontal guide rail is arranged on the vertical adjusting support, a vertical imaging instrument and a spiral liquid feeding device are arranged on the first horizontal guide rail, a rear support is vertically arranged at the rear end of the pedestal, a second horizontal guide rail is arranged on the rear support, and a horizontal imaging instrument is arranged on the second horizontal guide rail. The apparatus has the advantages of simple structure, operation convenience and low cost. Quantitative deionized water is dropped on the surface of a test piece to be detected, after liquid beads reach static balancing, photograph is taken, a liquid bead model is established by using Auto CAD software, and absolute contact area and residual absolute volume of the liquid beads are obtained for evaluating hydrophobicity of the test piece to be detected; the operation is simple, and influence of artificial factors is reduced.

Description

technical field [0001] The invention relates to the technical field of material hydrophobicity evaluation, in particular to a measuring device and a measuring method for the evaluation of concrete surface hydrophobicity, in particular to the hydrophobicity evaluation for concrete surface anticorrosion technology comparison tests. Background technique [0002] In order to improve the durability of concrete structures, various design and construction measures can usually be taken at the material level, component level and / or structural level, among which concrete surface anti-corrosion belongs to a class of economical and effective anti-corrosion technology at the material level. [0003] The surface anti-corrosion technology of concrete structures mainly relies on the insulating layer on the concrete surface as a physical shield, making it difficult for media such as moisture, oxygen, chloride ions, and acid gases to penetrate into the concrete protective layer and block the i...

AI Technical Summary

Problems solved by technology

[0007] However, for concrete engineering, the existing technology uses contact angle as an index to evaluate the surface hydrophobicity of concrete structures. The angle has limitations, especially for the sample and the experimental environment, and the consistency and pertinence of the experimental conditions cannot be achieved for different surface anti-corrosion technologies.

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