Underwater self-compacting concrete and preparation method thereof

Abstract

The invention discloses underwater self-compacting concrete and a preparation method thereof. The concrete is prepared from components in parts by weight as follows: 720-750 parts of coarse aggregate,450-500 parts of fine aggregate, 500-540 parts of cement, 200-240 parts of water, 140-155 parts of porous microspheres, 13-15 parts of a film-forming agent and 35-55 parts of a thickener, and the thickener comprises terpene-phenolic resin emulsion, epoxy resin and beta-terpene resin. The underwater self-compacting concrete and the preparation method thereof provided by the invention have the advantages that the fluidity is higher, the self-compacting effect is realized, the compactness and the strength are improved, and the underwater self-compacting concrete can be poured underwater and is not easy to disperse.

Description

technical field [0001] The invention relates to the technical field of concrete, more specifically, it relates to an underwater self-compacting concrete and a preparation method thereof. Background technique [0002] Self-compacting concrete refers to the concrete that can flow and compact under its own gravity, and can completely fill the formwork even if there are dense steel bars, and at the same time obtain good homogeneity and do not require additional vibration. [0003] The invention patent application with the authorized notification number CN106145834A discloses a self-compacting concrete, including the following components by weight: 100 parts of cement, 38-50 parts of composite admixture, 80-120 parts of pottery sand, 150-250 parts of crushed stone 1.3-2.05 parts of composite admixture, 25-30 parts of water; among them, the composite material includes 25-35 parts of limestone, 13-15 parts of fly ash; the raw materials of composite admixture include naphthalene-bas...

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Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that when it is applied to pouring underwater projects, if it is in direct contact with water, the erosion of water will cause the cement slurry to separate from the aggregate, resulting in the loss of part of the cement slurry, and the remaining cement slurry. The cement has been suspended in the water for a long time. When the cement sinks, it has solidified and lost the ability to bond with the aggregate, which does not meet the technical requirements of underwater engineering.

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