Anti-corrosion anti-cracking permeability reducing agent for marine concrete and preparation method of anti-corrosion anti-cracking permeability reducing agent

Abstract

The invention discloses an anti-corrosion anti-cracking permeability reducing agent for marine concrete and a preparation method of the anti-corrosion anti-cracking permeability reducing agent, and belongs to the technical field of concrete admixtures. The anti-seepage agent is prepared from the following raw materials in parts by weight: 5 to 10 parts of a water reducing agent, 4 to 10 parts of a micro-nano anti-seepage component, 1.5 to 3.5 parts of an air entraining agent, 3 to 9 parts of anti-crack fiber, 1 to 3 parts of inositol hexaphosphate, 1 to 5 parts of polypropylene glycol, 0.5 to 1 part of hydroxy propyl distarch phosphate, 0.5 to 1.5 parts of chitosan and 20 to 30 parts of water. According to the anti-seepage agent disclosed by the invention, nano silicon dioxide is modified in two steps and then is mixed with the anti-cracking fiber, two isolated strength enhancing substances are organically combined and jointly act with other raw materials, the anti-seepage and anti-cracking properties of a concrete material are remarkably improved, and the obtained admixture does not contain substances harmful to a human body, is chlorine-free, green and environment-friendly, and has a good application prospect. The durability of the concrete in the marine environment can be greatly improved, the service life is prolonged, and the safety is improved.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, and particularly relates to an anti-corrosion, anti-cracking, anti-seepage reducing agent for marine concrete and a preparation method thereof. Background technique [0002] Concrete used in marine engineering, also known as marine concrete. Marine engineering includes coastal engineering and offshore engineering. All structures constructed under the influence of seawater and the concrete used for structures on the shore that are often splashed by waves are all marine concrete. Due to frequent or periodic contact with seawater, the physical and chemical action of seawater or marine atmosphere (containing chloride ions), or the impact and abrasion of waves and running water, marine concrete suffers damage and shortens the service life. In addition to the strength and workability of the mixture, marine concrete should meet the design and construction requirements, and should also have ...

AI Technical Summary

Problems solved by technology

However, some waterproof admixtures containing chloride ions are likely to aggravate the corrosion of steel bars and metal embedded parts inside the concrete; waterproofing agents containing expansion components, if the early maintenance conditions of the concrete are not good, and the early expansion value of the expansion agent is too large, it is easy to cause late concrete corrosion. Cracking affects the anti-corrosion effect; admixtures containing fatty acids can form a hydrophobic layer inside the concrete, and there are hydrophobic substances in the capillary pores of the concrete, but in the case of long-term aggressive solution erosion, the effective components The bond between the concrete matrix and the degradation is easy to be leached by the erosive solution, which affects the durability of concrete

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