Method for detecting water absorption process on concrete surface

Abstract

A method for detecting a water absorption process of a concrete surface (1001) comprises: spraying water to a to-be-detected concrete surface (1001) (1101); recording time-varying color or brightness of an image of the to-be-detected concrete surface (1001) in a water absorption process (1103); and computing, according to the recorded time-varying color or brightness of the image, an index value representative of the water absorption process (1105). A concrete surface (1001) is processed in real time by means of a shooting and computing capability of a smart phone (1004); by adding an identification image (1002) and utilizing an image processing technology, an actual water spraying range of water spraying at each time is accurately computed, so as to make it possible to compute the yield of water within unit area; and by means of a fixed water spraying quantity and a water spraying tool (1003) having a uniform spraying function, the certainty of the water spraying quantity at each time is ensured, and the test accuracy is guaranteed.

Description

technical field [0001] The present invention relates to concrete, and more particularly, to a method for detecting water absorption on the surface of concrete. Background technique [0002] The permeability of surface concrete has a great influence on the durability of reinforced concrete structures, and the durability of concrete has been paid more and more attention in recent years. Therefore, it is of great significance how to conveniently and easily carry out non-destructive testing on the permeability of existing concrete structures on site. [0003] Water spray test is a non-destructive testing method of concrete surface permeability that can be implemented on site. Its principle is to spray water on the concrete surface, and measure the water absorption process of the concrete surface according to the color or brightness change of the concrete surface after spraying water, and then evaluate Permeability of concrete surfaces. [0004] At present, the existing technol...

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Problems solved by technology

[0007] Although existing methods can be used to measure the speed of concrete surface water absorption in the water spray test, there are two types of problems in the existing methods: the one is that the equipment used when carrying out the water spray test in the existing method sprays water to the concrete surface. The range and amount of water cannot be guaranteed to be accurate and consistent each time, and the existing method defaults to a fixed amount of water sprayed per unit area on the concrete surface in each test, which makes the detection error and cannot accurately reflect the water absorption of the concrete surface after each water spray Second, the existing methods are all data processing after obtaining the test data, and it is impossible to obtain the speed of concrete water absorption in real time on site.

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