Chloride ion adsorption agent for reinforced concrete structure and preparation method thereof

Abstract

The invention discloses a chloride ion adsorption agent for a reinforced concrete structure and a preparation method thereof. The adsorption agent is prepared from the following ingredients in percentage by mass: 20 to 30 percent of cenosphere, 11 to 18 percent of mesoporous molecular sieves, 7 to 14 percent of nanometer SiO2, 4 to 8 percent of regenerated active carbon, 5 to 15 percent of calcium aluminate powder, 15 to 25 percent of calcined kaolin and 12 to 20 percent of aluminoferic cement clinkers. The chloride ion adsorption agent has the advantages that all ingredients are scientifically matched; the synergistic effect is achieved; harmful ions such as chloride ions are subjected to physical absorption by a large area of the chloride ion adsorption agent; the ingredients and the chloride ions form chemical bonds; Friedel salt is generated; the content of free chloride ions is reduced, so that the corrosion on steel bars in the reinforced concrete structure is reduced; through the physical filling effect, the reinforced concrete compactness is improved, and the harmful ions such as chloride ions are prevented from entering the inside of concrete; gel substances are generated through the volcanic ash effect, and the space originally occupied by water is filled, so that the compactness and the strength of the reinforced concrete are improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a chloride ion adsorbent for reinforced concrete structures and a preparation method thereof. Background technique [0002] As we all know, the combination of concrete materials and steel bars can complement each other. Steel bars not only greatly enhance the bearing capacity of the structure, but also enhance the toughness of the structure, but they are very sensitive to the environment and do not have good durability. With the development of the economy, marine resources are increasingly being developed, and there are more and more concrete buildings in the marine environment. Due to the particularity of the marine environment, concrete structures are easily corroded and damaged, and once the concrete buildings are damaged, maintenance will be very troublesome or even impossible. This has gradually attracted the attention of relevant parties. In view of ...

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Problems solved by technology

Cl in ambient medium - After the concrete protective layer reaches around the steel bar, it will destroy the passivation film of the steel bar, cause the steel bar to corrode, reduce its effective section, reduce its mechanical properties such as bond strength, make the concrete protective layer swell along the bar, and cause marine concrete structures to crack. Durability Hazard

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