A rapid method for measuring the fineness modulus of construction sand
A fineness modulus and rapid determination technology, applied in the direction of measuring devices, particle size analysis, instruments, etc., can solve the problems of inability to specify the shape characteristics of a single aggregate, high labor intensity, low efficiency, etc., to save labor and economic costs, Easy to operate, solve the effect of cumbersome operations
Active Publication Date: 2019-10-29
天泓(济南)智能装备产业研究有限公司
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Problems solved by technology
The sieving method reflects the shape characteristics of the sand by obtaining indirect indicators, which cannot be specific to the shape characteristics of a single aggregate. It not only needs a screen with a series of specific sieve holes, but also has the problems of high labor intensity and low efficiency. Due to the need for repeated Weighing and human judgment to terminate the sieving when the passing amount of each sample is less than 0.1% of the total sample amount will easily cause errors
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Embodiment 1
[0030] The technological process of the rapid determination method of sand fineness modulus for construction involved in this embodiment includes image acquisition, size conversion, image preprocessing, surface sand grain image extraction, surface sand grain image processing, sand grain characteristic parameter statistics, and sand grain fineness modulus analysis A total of seven steps (such as figure 1 shown):
[0031] (1) Image acquisition: select a sand pile to be used in a construction project, randomly select three positions of the sand pile and place a rotating cylindrical scanning device (such as figure 2 shown) into the sand pile to be tested, turn on the power switch 5, press the one-button scanning switch 7, the servo motor 16 starts to rotate and drives the scanner 18 to rotate at a constant speed through the rotating shaft 17, and the scanner 18 rotates while rotating Scanning, the scanner 18 rotates and scans 360° and automatically stops scanning. The servo moto...
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The invention belongs to the technical field of measuring parameters of civil engineering materials, and relates to a method for quickly measuring the fineness modulus of construction sand. The process includes image acquisition, size conversion, image preprocessing, surface sand image extraction, surface sand image processing, and sand characteristics. Seven steps of parameter statistics and sand grain fineness modulus analysis, using image processing technology to extract the upper fully exposed sand grain profile image information for data classification statistics and analysis, blurring the lower layer full coverage and half coverage sand grain images as background images, improving To improve the accuracy of sand particle analysis, innovatively introduce the rotary cylindrical scanning device into the fineness modulus measurement of sand particles, realize the combination of photographing and image analysis technology of the rotary cylindrical scanning device, and avoid the traditional sampling mode, which solves the cumbersome operation of scattered arrangement when analyzing sand grain gradation by image, and greatly saves economic costs through the extraction of surface sand grain images.
Description
Technical field: [0001] The invention belongs to the technical field of measuring parameters of civil engineering materials, and in particular relates to a method for quickly measuring the fineness modulus of sand used in construction. The sand particle image information obtained by a rotary cylindrical scanning device is used to analyze the scanned image to obtain the sand particle image information. particle size distribution and fineness modulus. Background technique: [0002] Sand is an important part of concrete materials. It is called fine aggregate in construction. It is divided into coarse sand, medium sand and fine sand according to different diameters; the particle gradation of sand is an important factor determining the mix ratio and performance of concrete; engineering Before construction, the calculation and analysis of the gradation of construction sand is an important link in the construction process. The fineness module of sand is an index reflecting the grad...
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IPC IPC(8): G01N15/02
CPCG01N15/0227
Inventor 范宏刘树明赵铁军金祖权
Owner 天泓(济南)智能装备产业研究有限公司