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A Method for Evaluating Concrete Stability by Image Analysis

An image analysis and concrete technology, which is applied in the field of performance evaluation of concrete materials, can solve problems such as not being able to truly reflect the particle size of aggregates, and achieve the effect of simple operation and intuitive images

Active Publication Date: 2021-08-27
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a method for evaluating the stability of concrete through image analysis. The technical problem to be solved is to overcome the shortcomings of the traditional image analysis method that cannot truly reflect the aggregate particle size, and can accurately, comprehensively and reliably evaluate Concrete segregation degree and aggregate particle size distribution

Method used

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  • A Method for Evaluating Concrete Stability by Image Analysis
  • A Method for Evaluating Concrete Stability by Image Analysis
  • A Method for Evaluating Concrete Stability by Image Analysis

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Embodiment

[0095] The present embodiment provides a method for evaluating the stability of concrete by image analysis, specifically comprising the following steps:

[0096] (1) Choose five kinds of concrete B-F with different aggregate gradations, and their mix ratios are listed in Table 1; according to the mix ratio in Table 1, prepare the aggregates of concrete B-F respectively;

[0097] Among them, such as figure 1 As shown, use cyan ore 1 with a particle size of 5-8mm to replace the aggregate to be tested with a particle size of 5-8mm; use red ore 2 with a particle size of 8-12mm to replace the aggregate to be tested with a particle size of 8-12mm; use 12- Yellow ore 3 with a particle size of 15mm replaces the aggregate to be tested with a particle size of 12-15mm; black ore 4 with a particle size of 15-20mm replaces the aggregate to be tested with a particle size of 15-20mm;

[0098] (2) According to the mix ratio in Table 1, mix the raw materials of concrete B-F respectively, and ...

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Abstract

The invention relates to a method for evaluating the stability of concrete through image analysis, comprising: preparing equivalent concrete: replacing aggregates of different particle diameters in the concrete to be tested with equal amounts of natural aggregates of different colors; preparing equivalent Concrete sample: mix the equivalent concrete, and pour it into a vertically placed elongated mold to form an equivalent concrete sample, and carry out standard maintenance for 7-28 days; Sample image analysis: collect the profile image of the equivalent concrete sample; set the specified threshold, segment the profile image to obtain the binary image of the equivalent concrete sample; perpendicular to the pouring direction, divide the Divide the binary image into n equal parts; calculate the area ratio of natural aggregates of various colors in each equal part, and calculate the separation index SI. The larger the value of the separation index SI, the higher the degree of segregation of the concrete and the worse the stability.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/02G06T7/136
Inventor 安晓鹏武斌史才军魏子易
Owner CHINA BUILDING MATERIALS ACAD
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