Compound concrete corrosion and rust-prevention agent and preparation method thereof

Abstract

The invention relates to a compound concrete corrosion and rust-prevention agent and a preparation method thereof. The compound concrete corrosion and rust-prevention agent comprises the following components in parts by mass: 60-90 parts of a mineral admixture, 10-30 parts of an expansion clinker, 3-10 parts of gypsum, 3-10 parts of limestone, and 1-2 parts of monoflurophospate. The method comprises the following steps: 1) preparing the raw materials; 2) crushing the blocked expansion clinker, gypsum and limestone to the blocks with the size being 20-40 mm, homogenizing the blocks and performing standing in a pile shed for 1 month; 3) sending the blocked expansion clinker, gypsum and limestone to a bowl mill according to mass proportion for crushing; and 4) mixing the mixed powder after ball milling with the mineral admixture and monoflurophospate powder, and stirring a mixture in a mixer to obtain the finished product. The product does not contain nitrite, has no harm on environment and human body, and can increase the concrete strength. Compared with a traditional corrosion inhibitor, the compound concrete corrosion and rust-prevention agent has excellent corrosion inhibition performance, can increase the concrete strength, and has the advantages of environmental protection and no harm, and can be widely used in sea environment zone buildings, and industrial and civil buildings having a reinforced concrete structure with chlorine salt corrosion such as deicing salt.

Description

technical field [0001] The invention belongs to the technical field of concrete anticorrosion and steel bar rust inhibition in the technical field of building materials, in particular to a composite concrete anticorrosion and rust inhibitor and a preparation method. Background technique [0002] Reinforced concrete structures are the most widely used building materials today. The premature failure of concrete structures caused by the corrosion of steel bars in concrete is the primary factor affecting the durability of concrete, which not only destroys the safety of buildings, but also causes huge economic losses to the country. [0003] Under the condition of high alkalinity, a dense oxide film will be formed on the surface of the steel bar, which makes the surface of the steel bar in a passivated state and protected. However, when the chloride concentration on the surface of the steel bar in the concrete is higher than a certain critical value, or when the concrete is erod...

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Problems solved by technology

[0005] At present, the most widely used anti-corrosion and rust inhibitors are nitrites, chromates, molybdates, etc. The disadvantages of this kind of rust inhibitors include toxicity and rust resistance defects: first, they are harmful to the environment and the human body. Toxic hazards, even carcinogenic; second, once the amount of this kind of rust inhibitor is insufficient, it will accelerate the corrosion of steel bars, so it is called "dangerous" rust inhibitor

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