Preparation and casting construction method of high-strength anti-scouring abrasion type concrete with surface reinforcing layer

Abstract

The invention relates to a preparation and casting construction method of a high-strength anti-scouring abrasion type concrete with a surface reinforcing layer. The preparation and casting construction method has the advantages that the high-hardness, firm and clean aggregate is adopted, the proper strength class, water-adhesive ratio and lump degree of the concrete are controlled, the water-facing plaster surface is provided with the hard abrasive reinforcing layer and the like, and the anti-scouring abrasion property of the concrete is greatly improved; the preparation and casting construction method is an effective plan for solving the problem of easiness in scoring abrasion and destroy of the existing hydraulic building concrete.

Description

technical field [0001] The invention belongs to the field of concrete construction of water conservancy and hydropower projects subject to water erosion and erosion, and relates to a preparation and pouring construction method of high-hardness anti-abrasion concrete with a surface strengthening layer added. Background technique [0002] In water conservancy and hydropower projects, there are parts that are eroded and eroded by water flow. The concrete in these parts is often destroyed prematurely due to the action of water flow. The water flow intruded into the lower structure and caused the upper concrete slab to be overturned, fractured and displaced, thus affecting the normal operation of the project. According to the analysis, the main reason is that the hardness of the concrete used for the scoured parts is not enough, and the existing practice pays too much attention to the strength of the cement stone in the concrete, such as adding silica fume and anti-scouring admix...

AI Technical Summary

Problems solved by technology

[0002] In water conservancy and hydropower projects, there are parts that are eroded and eroded by water flow. The concrete in these parts is often destroyed prematurely due to the action of water flow. The water flow intrudes into the lower structure, causing the upper concrete slab to be overturned and fractured and displaced, thus affecting the normal operation of the project

According to the analysis, the main reason is that the hardness of the concrete used for the scoured parts is not enough, and the existing practice pays too much attention to the strength of the cement stone in the concrete, such as adding silica fume and anti-scouring admixtures to the concrete instead of Attention should be paid to the overall hardness of concrete. Sand and stone materials, which are concrete skeletons and account for a large volume, are not high enough in hardness and firmness. At the same time, there are also high fluidity of concrete mixtures. After pouring and vibrating, the aggregates sink and the cement slurry Floating up, resulting in a decrease in the hardness of the surface material

In addition, the concrete in these parts will also be too viscous due to the pursuit of high strength, it is difficult to pour densely, and the surface is not easy to level and smooth, resulting in a decrease in abrasion resistance

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