Composite type reinforced concrete rust inhibitor

Abstract

The invention relates to a composite type reinforced concrete rust inhibitor. The composite type reinforced concrete rust inhibitor comprises the following components by weight percent: an anode type rust inhibitor adopts 20.0 to 30.0 percent of calcium nitrite and 10.0 to 15.0 percent of sodium benzoate; and a cathode type rust inhibitor adopts at least one of sodium hexametaphosphate and zinc oxide, wherein the cathode type rust inhibitor comprises 1.0 to 3.0 percent of sodium hexametaphosphate, 2.0 to 4.0 percent of zinc oxide, 0.001 to 0.005 percent of air entraining agent and the balance of volcanic ash. The rust inhibitor can effectively retard and prohibit the corrosion of reinforcing steel bars in reinforced concrete and can prohibit or delay the destruction of chlorine ions to a reinforced passivating film. The invention has the advantages of little use quantity, use quantity reduction of a single rust inhibitor and the like, is a high-efficiency concrete reinforcement rust inhibitor and can be widely applied to the fresh reinforced concrete structure of the engineering of seaports, railways, coastal buildings, civil buildings and the like.

Description

technical field [0001] The invention relates to a composite rust inhibitor for reinforced concrete. Background technique [0002] The economic loss caused by corrosion of steel bars is very huge. It has been reported in the literature that the annual economic loss caused by steel corrosion damage to infrastructure in the United States reaches 150 billion U.S. dollars every year, and the annual infrastructure repair cost in the United Kingdom is 5.5 billion pounds. Corrosion losses were $25 billion and were specifically identified as mostly due to corrosion of steel reinforcement. In my country, the phenomenon of "sea sand houses" in coastal areas and the corrosion of steel bars caused by spraying deicing salt on roads and bridges in northern areas are also very serious. The anti-corrosion of steel bars in reinforced concrete structures has attracted more and more attention in the industry, especially for major foundational projects, it is necessary to take necessary anti-co...

AI Technical Summary

Problems solved by technology

These inventions all adopt organic and inorganic multiple materials to be used in combination, and have excellent anti-corrosion properties, but fail to improve other properties of concrete, such as compactness, impermeability, etc., from the perspective of concrete anti-corrosion agents themselves.

If the concrete mix design is unreasonable, it may aggravate the occurrence of corrosion

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