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Concrete anti-carbonization inhibitor and preparation method thereof

An anti-carbonation and inhibitor technology, applied in the field of new building materials, can solve the problems of the overall strength and comprehensive performance of reinforced concrete structures, the weakening of the protective effect of steel bars, and the reduction of alkalinity. The effect of a wide range of raw materials

Active Publication Date: 2021-12-03
CHONGQING IND POLYTECHNIC COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the deficiencies in the prior art, the present invention provides a novel concrete anti-carbonation inhibitor and a preparation method thereof, which solves the problem that the alkalinity of concrete decreases after carbonation, the protective effect of concrete on steel bars is weakened, and the overall strength and comprehensive strength of reinforced concrete structures are solved. The problem of performance degradation, improving the durability of reinforced concrete structures

Method used

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  • Concrete anti-carbonization inhibitor and preparation method thereof
  • Concrete anti-carbonization inhibitor and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Such as figure 1 As shown, first slowly add 100mL of 2% sodium metaaluminate solution to 250g of acidic silica sol to obtain a mixed solution, then reflux the mixed solution at 120°C for 60min, and after the reaction solution is cooled to room temperature, use 1mol / L of hydrochloric acid solution to adjust the pH value of the reaction solution to 3.0 to obtain the modified silica sol sealing agent solution; then add 300g of magnesium fluorosilicate, 150g of sodium silicate and 50g of potassium carbonate into deionized water and heat at 45°C Stir until a colorless and transparent solution A is obtained; then, add 25g of triethanolamine and 25g of 2,2-dihydroxydiethylamine into absolute ethanol to prepare a colorless and transparent solution B; finally, add sealant to solution A Pore ​​agent solution, solution B and 2g of cetyltrimethylammonium bromide were heated and stirred until completely dissolved, diluted with water to 1000mL, and milky white anti-carbonization inh...

Embodiment 2

[0044] First, slowly add 100mL of 6% sodium metaaluminate solution into 250g of acidic silica sol to obtain a mixed solution, then reflux the mixed solution at 150°C for 90min, and after the reaction solution is cooled to room temperature, use 1mol / L Hydrochloric acid solution to adjust the pH value of the reaction solution to 3.0 to obtain the modified silica sol sealing agent solution; then add 270g magnesium fluorosilicate, 90g sodium silicate and 70g potassium carbonate to deionized water, heat and stir at 55°C until the obtained A colorless and transparent solution A; then, 70g of triethanolamine was added to absolute ethanol to prepare a colorless and transparent solution B; finally, a sealing agent solution, solution B and 5g of cetyl polyoxyethylene were added to solution A Ether dimethyloctylammonium chloride, heated and stirred until completely dissolved, diluted with water to 1000mL, cooled to room temperature to obtain a milky white anti-carbonization inhibitor.

Embodiment 3

[0046] First, slowly add 100mL of 8% sodium metaaluminate solution into 250g of acidic silica sol to obtain a mixed solution, then reflux the mixed solution at 135°C for 100min, and after the reaction solution is cooled to room temperature, use 1mol / L Hydrochloric acid solution to adjust the pH value of the reaction solution to 3.0 to obtain the modified silica sol sealing agent solution; then add 400g magnesium fluorosilicate, 200g sodium silicate and 40g potassium carbonate to deionized water, heat and stir at 65°C until the obtained A colorless and transparent solution A; then, add 40g of 2,2-dihydroxydiethylamine into absolute ethanol to prepare a colorless and transparent solution B; finally, add the above-prepared sealing agent solution, Solution B and 7g of octadecyldimethylbenzyl ammonium chloride were heated and stirred until completely dissolved, diluted with water to 1000mL, and milky white anti-carbonization inhibitor was obtained after cooling to room temperature. ...

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Abstract

The invention discloses a concrete anti-carbonization inhibitor and a preparation method thereof, and relates to the technical field of concrete surface protection. The anti-carbonization inhibitor comprises a film-forming agent, a film-forming accelerant, a CO2 absorbent, a hole sealing agent and a penetrating agent; wherein the film forming agent is one or more of magnesium fluosilicate, sodium fluosilicate and gamma-(2, 3-epoxypropoxy) propyl trimethoxy silane; the film-forming accelerant is one or more of lithium silicate, sodium silicate and potassium silicate; the CO2 absorbent is one or more of potassium carbonate, sodium carbonate, triethanolamine and 2, 2-dihydroxydiethylamine; the hole sealing agent is modified silica sol; and the penetrating agent is one or more of hexadecyl trimethyl ammonium bromide, hexadecanol polyoxyethylene ether dimethyl octyl ammonium chloride and octadecyl dimethyl benzyl ammonium chloride. According to the concrete anti-carbonization inhibitor, the raw materials are easy to obtain, the preparation process is simple, CO2 can be physically isolated, CO2 diffused to the surface of concrete can be absorbed, and concrete carbonization inhibition dual protection is achieved.

Description

technical field [0001] The invention relates to the technical field of new building materials, in particular to a concrete anti-carbonation inhibitor and a preparation method thereof. Background technique [0002] The formation of concrete is mainly due to the chemical reaction between cement and water, and the hydration reaction between the two makes hydrates with higher strength produced in the substance. The addition of basic materials such as stones, sand and admixtures can make the dispersed sand and stones condense and bond into piles with the help of hydrates with high strength, thus forming the concrete required for construction projects. The carbonation of concrete is caused by the chemical action of the hydrate formed by the reaction of cement and water with the carbon dioxide in the air, which is also called the neutralization process of concrete. In general, the minerals in cement are mostly tricalcium silicate and dicalcium silicate, accounting for about 75% of...

Claims

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Application Information

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IPC IPC(8): C04B41/68
CPCC04B41/68C04B41/5035C04B41/5032C04B41/5024C04B41/501C04B41/5018C04B41/46C04B41/4539C04B41/4896
Inventor 张欣文家新王婧冒朝静
Owner CHONGQING IND POLYTECHNIC COLLEGE
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