Concrete for rapid construction under marine environment and preparation method thereof

Abstract

The invention discloses concrete for rapid construction under the marine environment. The concrete is prepared from, per cubic meter, 300-450 kg of sulphate aluminum cement, 50-100 kg of granulated blast-furnace slag powder, 10-50 kg of silica fume, 650-780 kg of fine aggregates, 1,000-1,300 kg of coarse aggregates, 1-4 kg of high-performance water reducer, 8-15 kg of retarder and 130-165 kg of water. The concrete for rapid construction under the marine environment achieves the demolding strength earlier under the normal temperature and low temperature conditions, and can be widely applied tothe environment under the low-temperature condition such as anti-chloride corrosion and freezing resistance in the North under the marine environment.

Description

technical field [0001] The invention belongs to the field of concrete materials, and relates to a concrete for rapid construction in a marine environment and a preparation method thereof. Background technique [0002] China has 18,000 kilometers of coastline, a large tidal zone, and many islands far from the mainland. Due to the influence of marine climate and tides, the concrete construction conditions and construction time of engineering structures such as ports, bridges, etc. in the marine environment are often not guaranteed, especially under low temperature conditions, the early strength of concrete develops slowly, and the demoulding time of concrete is relatively short. Long, can not meet the rapid construction requirements of the project in the marine environment. [0003] At present, there is no special cement and concrete preparation technology suitable for rapid construction under marine conditions. In this type of engineering construction, only ordinary cement c...

AI Technical Summary

Problems solved by technology

Due to the influence of marine climate and tides, the concrete construction conditions and construction time of engineering structures such as ports, bridges, etc. in the marine environment are often not guaranteed, especially under low temperature conditions, the early strength of concrete develops slowly, and the demoulding time of concrete is relatively short. long, which cannot meet the requirements of rapid construction in marine environment

[0003] At present, there is no special cement and concrete preparation technology suitable for rapid construction under marine conditions. In this type of engineering construction, only ordinary cement can be used to prepare concrete, and concrete early strength agents and other measures are used for construction. Technical problems such as slow development of compressive strength, poor corrosion resistance, and short service life affect the normal construction of concrete in marine environments

Due to the slow development of the compressive strength of concrete and the low maturity of concrete, the concrete is easily corroded by seawater in the early stage, and the chloride salt of concrete is easy to invade the concrete, thus affecting the long-term durability of the concrete structure.

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