Method for determine surface structure depth of exposed aggregate concrete by curved surface fitting

Abstract

The present invention discloses a method adopting a surface fitting method to determine the depth of the surface structure of the exposed concrete, and adopts the steps: 1) a digital image of the measured road is shot; 2)the digital image is dealt with the decoloration treatment to be converted into a gray level image; 3)two-dimensional array data of the pixel matrix corresponding to the gray level image is extracted; 4)according to the extracted two-dimensional array data, the curved-surface model of the measured road is obtained with the surface fitting method; 5)the depth of the surface structure of the measured road is calculated according to the curved-surface model; the present invention has the advantages of simple and convenient operation, low expense, wide application range and high measurement precision.

Description

technical field [0001] The invention relates to a cement concrete pavement structure depth measurement technology, in particular to a method for determining the surface structure depth of exposed stone concrete by a curved surface fitting method. Background technique [0002] The texture structure of concrete pavement surface can be divided into microstructure and macrostructure. The microstructure of the pavement refers to the tiny structure that is actually in contact with the tire, the pavement and the aggregate surface are 0-0.5mm in the horizontal direction, and 0-0.2mm in the vertical direction. The wavelength of the section is below 0.5mm. The microstructure is generally called cement concrete The roughness of the mortar on the pavement surface mainly depends on the surface roughness of the cement mortar and the exposed aggregate, so the quality of the microstructure has a great relationship with the choice of fine aggregate; The open spaces, pores and grooves are 0....

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Problems solved by technology

[0004] ①Sand laying method: It gives the average structure depth in a certain small area, which is suitable for measuring the structure depth of asphalt road surface and cement concrete road surface, and is used to evaluate the macroscopic roughness of the road surface, the drainage performance of the road surface and the anti-skid performance, its operation is simple, and the equipment is cheap. This method has a wide application base in countries all over the world, and has accumulated a large number of comparisons with other various testing methods, but it is time-consuming and labor-intensive, and the measurement results are greatly affected by human factors. The accuracy is not high;

[0005] ②Section method: The measurement instruments commonly used in this method include laser profilers, light scanners and probe trackers, all of which reflect the macroscopic structure of the road surface by detecting the rough structure of the longitudinal section of the road surface. This kind of equipment has been purchased, and further development and research have been carried out gradually, but this method requires special equipment and professionals, the equipment is expensive, and the operation is more complicated;

[0006] ③ Outflow: It indirectly reflects the macroscopic structure of the road surface by monitoring the time for a fixed volume of water to pass through the road surface. Compared with the previous two types of macroscopic structure testing equipment, the outflow instrument is currently not widely used in China

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