Anti-corrosion geopolymer concrete filling pile material as well as preparation method and construction process thereof

Abstract

The invention discloses an anti-corrosion geopolymer concrete filling pile material, which is prepared from the following ingredients in parts by weight through preparation: 100 parts of metakaolin, 10 to 40 parts of fly ash, 150 to 250 parts of modified water-glass with the modulus number being 1.2 to 1.8, 400 to 600 parts of fine sand, 800 to 1500 parts of stone, 5 to 20 parts of polyvinyl alcohol fiber and 5 to 10 parts of boric acid, wherein the modified water-glass is prepared from 6 to 15 parts of water, 15 to 40 parts of sodium hydroxide and 129 to 195 parts of water-glass sold on the market. The invention also discloses a preparation method of the anti-corrosion geopolymer concrete filling pile material, and a construction process of the anti-corrosion geopolymer concrete filling pile material. The metakaolin base geopolymer-PVA fiber concrete filling pile material with good rheological property and anti-corrosion performance capable of being used for filling pile grouting construction can be prepared; the technical scheme has the advantages that the use is simple; the concrete material realizes the fast hardening and early strength; the construction is fast and continuous;the adaptability is high; the high efficiency of the materials can be realized; the material can be widely applied to the practical engineering of the filling pile in corrosive environment such as northwest salt and alkaline land engineering construction.

Description

technical field [0001] The invention belongs to the field of corrosion-resistant materials in marine engineering building materials, and in particular relates to a corrosion-resistant polymer concrete cast-in-situ pile material, a preparation method thereof and a construction process of the cast-in-place pile. Background technique [0002] Corrosion of building structural components is the direct cause of structural function degradation and shortened service life, and the resulting losses cannot be estimated. Whether it is a cement-based reinforced concrete structure, a steel structure or a composite structure, various degrees of corrosion problems will occur in a saline-alkali corrosion environment. Geopolymer material is a new type of inorganic green gelling material, which consists of AlO 4 and SiO 4 Formed by polymerization of tetrahedral monomers, the material has excellent mechanical properties, freeze-thaw resistance and high temperature resistance. More importantly...

AI Technical Summary

Problems solved by technology

[0004] There are the following defects in the existing cast-in-place pile concrete anticorrosion materials as mentioned above: (1) most of the anticorrosion materials are coating materials, and the materials used in cast-in-place piles themselves cannot achieve good anticorrosion effects; (2) the adopted anticorrosion coating Most of the layers are resinous organic materials, and their production and use are not conducive to the environment. In addition, most of the coating processes are only applicable to prefabricated pile foundations. For cast-in-situ pile foundations, the use of coatings increases the difficulty and cost of construction and the use effect It is not as good as the coating of prefabricated pile foundation; (3) The application of self-compacting cement-based materials can effectively prevent the penetration of chloride salts and protect steel bars from corrosion. The overall anti-corrosion effect of cast-in-situ pile foundation is not good

To sum up, the existing anti-corrosion materials cannot meet the anti-corrosion process of cast-in-situ piles under the corrosion conditions of marine engineering; (4) The geopolymer grouting materials used in the previous patent documents cannot have both strength and good fluidity. It has caused a relatively large impact on both on-site construction and later use; (5) According to the "Code for Anti-corrosion Design of Industrial Buildings" GB50046-2008, the traditional cast-in-place pile structure uses a structural system of ordinary Portland cement-based concrete and steel bars. In the highly corrosive environment with high sulfate and chloride salts, cast-in-situ piles cannot be used, but prefabricated piles can only be used and special anti-corrosion treatment is required, which brings inconvenience to the construction and design of some pile foundation projects.

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