Anti-corrosion rust inhibitor for concrete and preparation method of anti-corrosion rust inhibitor

Abstract

The invention discloses an anti-corrosion rust inhibitor for concrete and a preparation method of the anti-corrosion rust inhibitor. The raw materials of the anti-corrosion rust inhibitor comprise calcium nitrate, sodium carbonate, a polycarboxylic acid water reducing agent, ethylenediaminetetramethylene phosphonic acid, barium nitrate, ethylene glycol, vitamin C, ethylenediamine disodium tetraacetate and water. The preparation method comprises the steps: preparing a calcium nitrate solution and a sodium carbonate aqueous solution separately, dissolving the polycarboxylic acid water reducing agent and ethylenediamine tetramethylene phosphonic acid in water, placing the solution of the polycarboxylic acid water reducing agent and ethylenediamine tetramethylene phosphonic acid in a four-necked flask, then adding the calcium nitrate solution and the sodium carbonate solution to the flask at a constant rate dropwise and simultaneously, performing a reaction at 20-35 DEG C, completing thewhole dropping process within 1-3 hours, dissolving the barium nitrate, ethylene glycol, vitamin C and ethylenediamine disodium tetraacetate in water, putting the obtained solution into a nanometer calcium carbonate suspension, and performing even stirring. The concrete which is manufactured through the provided anti-corrosion rust inhibitor for concrete has good resistance to sulfate corrosion and a rust-resisting effect, good workability is achieved at a water-to-binder ratio, and construction operation is convenient.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of building material additives, in particular to a concrete anticorrosion and rust inhibitor and a preparation method thereof. [0003] 【Background technique】 [0004] Reinforced concrete structures can give full play to the advantages of both steel and concrete to withstand external loads, and are widely used in civil engineering structures such as medium and high-rise buildings, long-span bridges, tunnels, and subways. In these civil engineering structures, the durability of concrete is especially critical and often directly determines the lifespan of the building. Among the factors affecting the durability of concrete, one of the most important factors is chloride and sulfate corrosion. Chloride and sulfate corrosion will cause reinforced concrete structures to expand and crack, steel bars to corrode, etc., resulting in performance degradation and even failure of reinforced concrete structures, s...

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Problems solved by technology

[0007] Chinese invention patent CN104478286B discloses a composite anticorrosion and rust inhibitor for concrete, which is mainly composed of polycarboxylate water reducer, sodium dodecylsulfonate, N-methylethanolamine, sodium molybdate and other components, which can improve concrete The anti-chloride ion penetration performance can significantly alleviate the damage of chloride ions to the passivation film of steel bars, and has a significant anti-corrosion effect. It can prevent sulfate ions from entering the concrete through certain physical means, but this composition ratio cannot absorb the sulfate ions entering the concrete. sulfate ion

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