C30 underwater self-compacting concrete and preparation method thereof

Abstract

The invention relates to the technical field of building materials, and particularly discloses C30 underwater self-compacting concrete and a preparation method thereof. The C30 underwater self-compacting concrete is prepared from the following components in parts by weight: 255 to 310 parts of cement, 52 to 100 parts of fly ash, 25 to 52 parts of slag powder, 1015 to 1088 parts of coarse aggregate, 726 to 810 parts of fine aggregate, 5 to 6 parts of polycarboxylic acid high-performance water reducing agent and 165 to 196 parts of water. The preparation method comprises the following steps: S1, uniformly mixing the cement, the fly ash, the slag powder, the coarse aggregate and the fine aggregate to obtain a mixture; and S2, uniformly mixing a polycarboxylic acid high-performance water reducing agent with water, adding the mixture into the mixture, and uniformly mixing to obtain the C30 underwater self-compacting concrete. The C30 underwater self-compacting concrete has the advantages of good water-retaining property, good workability, long setting time, strong underwater dispersion resistance, excellent moss growth prevention effect and long-lasting placement.

Description

technical field [0001] This application relates to the technical field of building materials, more specifically, it relates to a C30 underwater self-compacting concrete and a preparation method thereof. Background technique [0002] With the continuous development of urban construction, the use of urban underground transportation space, the need for cost and the increasingly complex urban environment and other factors, new foundation pit support methods have emerged as the times require, and bored occlusal pile support is one of them. [0003] Bored occlusal piles refer to the continuous arrangement of concrete row piles, and part of the pile body is embedded between adjacent rows of piles, so that the subsequent construction of drilled piles and the hole-shaped cutting occlusion completed in the previous construction are integrated into a whole, thus forming a unique structure. The continuous "pile wall" support structure with soil retaining and waterproof functions, this c...

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Problems solved by technology

[0005] In order to increase the initial setting time of concrete, concrete retarders are generally added to it. Because of its nature of introducing air, too much dosage will cause the reduction of concrete strength and poor hardening, and the gel time is short, which is generally difficult to meet. The need for concrete with an exceptionally long setting time

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