A heat of hydration inhibiting concrete anticorrosion rust inhibitor and its preparation method and application

Abstract

The invention discloses a heat of hydration inhibiting concrete anticorrosion and rust inhibitor and its preparation method and application. The anticorrosion and rust inhibitor is made of the following raw materials in mass percentage: 1% to 3% of hydration heat inhibiting components, Ammonium heptamolybdate 0.5% to 1%, sodium hexametaphosphate 0.2% to 1%, gypsum 95% to 99%. The anti-corrosion and rust inhibitor can be mixed into concrete to resist the corrosion of sulfate and chloride ions to concrete. The preparation method of the present invention is simple, and only needs to mix several raw materials evenly. The prepared anti-corrosion and rust inhibitor has The following advantages: It can significantly reduce the early hydration rate and heat of hydration of cement, thereby reducing the internal hydration temperature rise of concrete and reducing early temperature shrinkage cracks; it can improve the ability of concrete to resist sulfate and chloride ion erosion, and form passivation on the surface of steel bars film, which plays an active role in rust prevention. It can be widely used in large-volume concrete structures in sulphate and chloride corrosion environments.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, and in particular relates to a hydration heat-inhibiting concrete anticorrosion and rust inhibitor as well as a preparation method and application thereof. Background technique [0002] In recent years, the durability of reinforced concrete structures has become a worldwide concern. Coastal ports and saline soil areas usually contain a large amount of sulfate and chloride salts, which have a serious erosive effect on concrete and steel bars, causing serious damage to reinforced concrete structures and seriously affecting their service life. The existing traditional anti-corrosion method uses a certain amount of mineral admixtures in the concrete to improve the compactness of the cement and reduce the salt corrosion stress, but the effect of this method is limited. The use of rust inhibitors to delay the corrosion of steel bars is an important measure to improve the durability of rein...

AI Technical Summary

Problems solved by technology

However, it does not have the function of inhibiting the heat of hydration in the early stage of concrete, cannot well control the generation of early temperature shrinkage cracks, and cannot resist the erosion of sulfate on concrete at the same time. In land areas, reinforced concrete structures remain vulnerable to damage

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