Method for evaluating concrete stability through image analysis

An image analysis and concrete technology, applied in the field of concrete material performance evaluation, can solve the problem of not being able to truly reflect the aggregate particle size, etc., and achieve the effect of simple operation and intuitive image.
CN109900604AActive Publication Date: 2019-06-18CHINA BUILDING MATERIALS ACAD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA BUILDING MATERIALS ACAD
Publication Date
2019-06-18

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Abstract

The invention relates to a method for evaluating concrete stability through image analysis. The method comprises steps that equivalent concrete preparation, aggregates of different particle size segments of the to-be tested concrete are replaced by the same amount of natural aggregates of different colors; equivalent concrete sample preparation, the equivalent concrete is mixed and is poured intoa vertically-placed long strip mold for molding to obtain an equivalent concrete sample, and standard maintenance is carried out for 7-28 days; image analysis on the equivalent concrete sample, a cross-sectional image of the equivalent concrete sample is acquired; specified threshold setting, the cross-sectional image is segmented to obtain a binary image of the equivalent concrete sample; the binary image is divided into n equal parts perpendicular to the casting direction; the proportion of the area of natural aggregates of each color in each equal part to the equal part is calculated, and aseparation index SI is calculated. The larger the value of the separation index SI, the higher the segregation degree of concrete and the worse the stability.
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Description

technical field

[0001] The invention relates to the field of evaluation methods for concrete material properties, in particular to a method for evaluating the stability of concrete through image analysis. Background technique

[0002] Concrete is one of the most important materials in the field of civil engineering. Because of its low production cost, wide source of raw materials, good working performance and durability, it is widely used in civil engineering, transportation infrastructure construction, marine engineering and other fields. .

[0003] However, in the actual construction of concrete, there will be stability problems such as segregation. The stability of concrete is damaged, resulting in segregation, which has a great impact on the working performance and durability of concrete. In the freshly mixed state, the poor stability will lead to poor deformation ability of the concrete, and it is easy to be blocked when encountering steel bars and other structures, an...

Claims

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