Detecting and evaluating method for appearance quality of concrete

Abstract

The invention discloses a detecting and evaluating method for appearance quality of concrete. The detecting and evaluating method comprises the following steps: firstly, selecting a detection sample with the area of S0, and shooting to obtain a surface photo; secondly, carrying out binarization processing on the surface photo; thirdly, analyzing the surface photo subjected to the binarization processing to obtain the percentage A of pixel points on a defective part; fourthly, calculating defect area S of the detection sample; fifthly, smearing a filling agent on the surface of the detection sample, and equivalently replacing detect volume V of the detection sample according to change of volume V0 before the filling agent is smeared and V1 after the filling agent is smeared; sixthly, calculating the defect average depth H of the detection sample, wherein the defect average depth H is equal to V/S; seventhly, comprehensively evaluating the surface appearance quality of the concrete according to the defect average depth H. According to the detecting and evaluating method disclosed by the invention, appearance defects of the concrete are quantitatively measured by adopting an image binarization processing technique and an isovolumetric replacement method, so that influence from human factors can be avoided, and evaluation for the appearance quality of the concrete is scientific and objective; in addition, the method is efficient and convenient, so that labor cost can be greatly reduced.

Description

technical field [0001] The invention relates to concrete commonly used in construction engineering, in particular to a method for detecting and evaluating the appearance quality of concrete. Background technique [0002] Concrete is the most widely used building material and plays an extremely important role in construction projects. With the high performance of concrete, more and more attention has been paid to the appearance quality of concrete. The current national standard GB50204-2015 "Code for Construction Quality Acceptance of Concrete Structure Engineering" stipulates the following regulations on the appearance quality of concrete: the appearance structure of the pouring structure of the main control project should not have serious defects, and serious defects that have occurred should be handled by the construction unit. Put forward a technical treatment plan, and deal with it after being approved by the supervision (construction) unit; for the part that has been t...

AI Technical Summary

Problems solved by technology

This method has played an important role in the general inspection and evaluation of concrete structures. However, this method is based on the detection results of artificial vision and relies heavily on the personal standards and experience of the inspectors, resulting in a lack of objectivity in the evaluation results and it is difficult to accurately quantify the structural appearance quality. degree of deterioration

In addition, in view of the large amount of concrete engineering and the wide area, the manual inspection method is time-consuming and labor-intensive, and the inspection cost is high. At the same time, the inspection process is limited by the environment, and the safety requirements for inspectors are very high.

[0004] In order to solve the above problems, those skilled in the art have been studying how to effectively judge the appearance quality of concrete in theory and practice, but so far no satisfactory evaluation method has been obtained.

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