Concrete corrosion resistant additive for sea construction

Abstract

The invention relates to a concrete corrosion proof additive for maritime work. The concrete corrosion proof additive is characterized in that the concrete corrosion-proof additive is prepared with the following components by weight: 40 to 80 percent of a sulfoaluminate micro-expanding agent, 0.1 to 2.0 percent of synthetic fiber, 1 to 10 percent of anticorrosive composition, 10 to 40 percent of fleur, and 0 to 12 percent of a water reducer. In the invention, the sulfoaluminate micro-expanding agent, the synthetic fiber, the anticorrosive composition, the fleur, the water reducer and so on are matched and compounded properly, thus forming the mutual superimposed effect. In this way, the crack resistance and the impermeability of concrete can be significantly improved; and chloride ions, vitriol and other hazardous substance can be effectively prevented from entering the concrete, thus preventing seawater and hazardous substance contained in seawater from eroding the concrete, protecting steel bars from being eroded, and improving the service life of concrete structure in maritime work.

Description

【Technical field】 [0001] The invention relates to an anti-corrosion admixture specially used for marine concrete, and belongs to the technical field of concrete admixtures. 【Background technique】 [0002] Marine concrete refers to the concrete that serves in the marine environment and is disturbed by sea water or sea wind. In the marine environment, the phenomenon of concrete structure damage is very common, and most of the built marine engineering projects cannot meet the design life requirements. Another pressing question. [0003] The main causes of marine concrete damage are: corrosion of steel bars, freezing damage in cold climates, physical and chemical effects of environmental erosion, and so on. Among them, steel bar corrosion is the main cause of concrete damage; when chloride ions in the marine environment diffuse into the concrete structure and accumulate on the surface of the steel bar to a certain concentration—the critical concentration, it will destroy the p...

AI Technical Summary

Problems solved by technology

Because these additional measures have shortcomings such as short service life, impact on concrete workability and mechanical properties, and high cost to varying degrees, and all additional measures can only play their due role in dense concrete with good durability. , therefore, increase the compactness of the concrete itself, greatly improve the crack resistance and impermeability of the concrete, and prevent Cl - The intrusion is the fundamental way to solve the durability of marine concrete structures

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