Method for detecting water absorbing process of concrete surface

Abstract

The invention relates to a method for detecting the water absorbing process of the concrete surface. According to the method, water is sprayed to the concrete surface to be detected; changes of colors or brightness of an image of the concrete surface to be detected along with time in the water absorbing process are recorded; according to the recorded changes of the colors or the brightness of the image along with the time, an index value representing the water absorbing process is calculated. The method can detect the water absorbing process of the concrete surface in water spraying tests accurately and fast on site. Shooting and calculation processing abilities of an intelligent mobile phone are adopted for carrying out real-time treatment on the water spraying tests for detecting the quality of the concrete surface. As an identifying image is added and the image processing technology is utilized, the actual water spraying range of water spraying each time can be accurately calculated, and calculation of the water amount in the unit area as an important index is made possible; as a water spraying tool which sprays the fixed water spraying amount and sprays the water uniformly is adopted, the determinacy of the water spraying amount is ensured, and test accuracy is ensured.

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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