Underwater concrete and preparation method thereof

Abstract

The invention discloses underwater concrete, belonging to the technical field of concrete. According to a technical scheme in the invention, the underwater concrete is prepared from the following rawmaterials in parts by weight: 35-45 parts of gravel, 3-10 parts of fine aggregate, 20-25 parts of machine-made sand, 6-20 parts of cement, 0.1-0.6 part of a polycarboxylate superplasticizer, 0.05-0.2part of sodium fluosilicate, 0.01-0.05 part of aluminum fluoride, 0.03-0.1 part of diethanol amine and 0.05-0.1 part of xanthan gum. The invention also provides the preparation method of the underwater concrete. The underwater concrete prepared by using the preparation method has the properties of low loss rate and rapid solidification, and can meet the requirement of rapid construction in seawater.

Description

technical field [0001] The present application relates to the technical field of concrete, more specifically, it relates to an underwater concrete and a preparation method thereof. Background technique [0002] Concrete that is mixed on land and poured and hardened in water is called underwater concrete, also known as conduit concrete. Its construction is to pour concrete through vertical pipes and rely on the concrete's own weight. It is suitable for underwater or underground projects such as grouting cofferdams, caisson foundations, caisson foundations, underground diaphragm walls, and pile foundations. Concrete flows out slowly from the bottom of the pipe, and expands its distribution to the surroundings, minimizing disturbance by the surrounding water flow, thereby ensuring quality. [0003] The conventional conduit construction method needs to wait for the cement to solidify before removing the conduit, and the cement takes a long time to solidify, so the construction ...

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Problems solved by technology

[0003] The conventional conduit construction method needs to wait for the cement to solidify before removing the conduit, and the cement takes a long time to solidify, so the construction time is very long. During this period, it will be affected by water flow or different water quality, especially in high seawater. The impact is especially obvious when the construction is in a saline-alkaline environment. The existing underwater concrete produces a lot of unqualified hardened concrete during the construction process of seawater coasts or barrier reefs. These unqualified concretes are generally used to prevent seawater pollution. It needs to be removed after construction, which is extremely wasteful of raw materials and labor costs

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