Underwater concrete and preparation method thereof

Abstract

The invention relates to the field of concrete, and particularly discloses underwater concrete and a preparation method thereof. The underwater concrete is prepared from the following raw materials in parts by weight: cement, sand, gravels, water, a flocculating agent, a water reducing agent and modified composite fibers, the modified composite fiber is prepared by the following method: weighing basalt fiber and polyurethane fiber, and mixing to obtain composite fiber; weighing a chitosan film solution, and spraying the chitosan film solution on the surface of the composite insecticidal powder to prepare coated micro powder; placing the coating micro powder on the surface of the composite fiber, stirring and and mixing, and drying to obtain a modified composite fiber; the preparation method of the underwater concrete comprises the following steps: weighing the cement, the sand, the gravel and the water, mixing and stirring to obtain a mixture; weighing a flocculating agent, a water reducing agent, the modified composite fiber and the mixture, mixing and stirring, and curing to obtain the underwater concrete. The product has the advantage that the strength of the underwater concrete is prevented from being influenced by penetrating transverse cracks on the surface and in the concrete.

Description

technical field [0001] The present application relates to the field of concrete, and more specifically, it relates to an underwater concrete and a preparation method thereof. Background technique [0002] Underwater concrete is concrete poured underwater. The concrete can be solidified and hardened underwater. When the water level is shallow, it can be poured directly for construction. When the water depth is deep, it can be poured by the standpipe method. [0003] When using underwater concrete to build a dam, the underwater concrete will directly contact with seawater, and organisms in the ocean are easy to attach to the surface of the underwater concrete. For example, the larvae of barnacles in the ocean can secrete viscose through suckers. The larvae are firmly attached to the concrete surface, and their adhesion strength can withstand the seawater washing at a flow rate of 2.2m / s. After the attachment, as the larvae grow and reproduce, the biological acid produced by th...

AI Technical Summary

Problems solved by technology

[0004] Therefore, underwater concrete is in long-term contact with marine organisms in seawater, which can easily cause marine organisms to attach to the concrete surface. With the growth and reproduction of marine organisms, it is easy to cause corrosion on the concrete surface and the interior of the concrete, resulting in penetration on the surface and interior of the concrete. transverse cracks, thus affecting the strength of underwater concrete

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