Manufactured sand underwater dispersion resistant concrete and preparation method thereof

Abstract

The invention relates to a manufactured sand underwater dispersion resistant concrete, which comprises the following components in parts by weight: 100 parts of cement, 1-5 parts of underwater dispersion resistant additive, 2-20 parts of silica fume, 1-20 parts of coal ash, 1-10 parts of an enhancer, 140-200 parts of manufactured sand, 140-200 parts of macadam, and 30-50 parts of water. The preparation method comprises the following steps of firstly putting the manufactured sand, the macadam aggregate, the cement, the enhancer, the coal ash and the silica fume into an agitator, blending through dry mixing, then adding the underwater dispersion resistant additive to further blend through dry mixing, adding water into the material blended through dry mixing previously, stirring for 5-8 minutes, then preparing the manufactured sand underwater dispersion resistant concrete. The manufactured sand underwater dispersion resistant concrete has strong construction mobility, so that the problem of contradiction of mobility and dispersion resistance of the underwater dispersion resistant concrete is better solved, and therefore, the manufactured sand underwater dispersion resistant concrete not only has good dispersion resistance, but also has self-leveling and self-compaction construction mobility.

Description

technical field [0001] The invention relates to a machine-made sand underwater anti-dispersion concrete and a preparation method thereof, belonging to the field of building materials. Background technique [0002] With the development of society, there are more and more underwater construction projects, and the underwater construction technology and construction quality of concrete have been paid more and more attention by the engineering and technical circles. The underwater structure is very complex, which requires higher concrete quality and construction technology. Traditional methods commonly used in underwater concrete construction include conduit method and open-bottom container method. These methods are mainly modified from construction equipment and methods to reduce or eliminate the contact between concrete mixture and water, thereby avoiding the influence of water. However, these methods often make the underwater construction process more complicated, the project...

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Problems solved by technology

[0006] In order to achieve the above object, the present invention adopts underwater anti-dispersion agent to increase the viscosity of machine-made sand concrete itself by optimizing the mix ratio, so as to realize the direct drop and pouring of concrete in water, and overcome the poor dispersion resistance of ordinary machine-made sand concrete in water , the disadvantage of low strength

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