Anti-crack corrosion-resistant concrete admixture as well as preparation and application of anti-crack corrosion-resistant concrete admixture

Abstract

The invention discloses an anti-crack corrosion-resistant concrete admixture as well as preparation and an application of the anti-crack corrosion-resistant concrete admixture. The anti-crack corrosion-resistant concrete admixture is prepared from the following raw materials by weight: 1.5-2.5 parts of fiber comprising a polypropylene fiber, a polyethylene fiber and a carbon fiber, 90-95 parts of an active mineral additive comprising a coal ash, metakaolin, slag and silica fume, and 3.5-7.5 parts of a reactive activator comprising nano dysprosium oxide, nano lanthanum oxide and nano yttrium oxide, the anti-crack corrosion-resistant concrete admixture is doped in a concrete, the weight ratio of a cement in the concrete is 10-40%, a proper amount of a polycarboxylic acid water reducer is added, and the specific doping amount is determined according to the coastal engineering. The pore structure of the concrete is thinned, the corrosion of harmful ions is reduced, the long-term strength of the concrete is guaranteed to improve stably, the carbon dioxide is absorbed, the peaceability, the compactness, the corrosion resistance, the early strength and the anti-cracking ability of the concrete are improved, the service life of the coastal engineering is prolonged, and the economic, social and ecological effects are better.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an anti-crack and anti-corrosion concrete admixture, its preparation and application. Background technique [0002] In water conservancy and hydropower projects, coastal hydraulic structures such as tidal gates and seawalls are prone to various defects leading to functional failure due to the environment of alternating wet and dry, tidal current impact, carbonization, microbial corrosion, chloride salt and sulfate corrosion . [0003] The concrete structure of coastal hydraulic structures is seriously damaged by corrosion, which affects the safety and benefit of the project. How to improve the performance of coastal hydraulic concrete is a big problem. The current research on anti-corrosion materials: on the one hand, it mainly focuses on how to improve the corrosion resistance of coastal hydraulic concrete, and lacks the crack resistance of coastal hydrau...

AI Technical Summary

Problems solved by technology

[0002] In water conservancy and hydropower projects, coastal hydraulic structures such as tidal gates and seawalls are prone to various defects leading to functional failure due to the environment of alternating wet and dry, tidal current impact, carbonization, microbial corrosion, chloride salt and sulfate corrosion

[0003] The concrete structure of coastal hydraulic structures is seriously damaged by corrosion, which affects the safety and efficiency of the project. How to improve the performance of coastal hydraulic concrete is a big problem

The current research on anti-corrosion materials: on the one hand, it mainly focuses on how to improve the corrosion resistance of coastal hydraulic concrete, and lacks the crack resistance of coastal hydraulic concrete; on the other hand, in order to avoid cracks in coastal hydraulic concrete, how to improve coastal hydraulic concrete The anti-crack performance of hydraulic concrete ignores the research on improving the anti-corrosion performance of coastal hydraulic concrete itself

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