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CN-121135212-B - Reinforced concrete corrosion-resistant rust inhibitor and preparation method thereof

CN121135212BCN 121135212 BCN121135212 BCN 121135212BCN-121135212-B

Abstract

The application relates to the technical field of building materials, and particularly discloses an enhanced concrete corrosion-resistant rust inhibitor and a preparation method thereof. The preparation method comprises the steps of pre-treating and grinding part of raw materials, dispersing active components, segmenting the composite materials, carrying out liquid phase surface modification, homogenizing and curing, and finally mixing with a thickening water-retaining agent. The product can be used for infrastructure concrete of bridges, tunnels and the like, and has the advantages of synergistically optimizing the compactness of the concrete, inhibiting the corrosion of reinforcing steel bars, guaranteeing the mixing water retention, enhancing the impermeability and improving the comprehensive performance of corrosion resistance and rust resistance; in addition, the preparation method has the advantages of orderly step connection, capability of ensuring uniform distribution of each component, capability of ensuring stable exertion of functions of products and easiness in realizing industrial production.

Inventors

  • WANG WEI

Assignees

  • 广东巨三集团有限公司

Dates

Publication Date
20260508
Application Date
20250917

Claims (6)

  1. 1. The preparation method of the reinforced concrete corrosion-resistant rust inhibitor is characterized by comprising the following steps of: S1, preprocessing and coarse grinding, namely putting 15-30 parts of sulphoaluminate cement clinker and 10-30 parts of superfine limestone powder into grinding equipment, and grinding for 25-40 minutes under the condition that the rotating speed is 250-350r/min to obtain a mixed base material A; S2, dispersing the active component, namely putting 25-45 parts of active silica micropowder, 5-15 parts of calcium nitrate and 3-10 parts of sodium molybdate into an efficient vortex dispersing machine, and carrying out dry dispersing for 15-25 minutes at the rotating speed of 1200-1800r/min until the variation coefficient of the mixing uniformity is less than 5%, so as to obtain a mixed active component B; S3, sectional fine compounding, namely adding the mixed base material A into dispersing equipment containing the mixed active component B for three times, stirring for 10-15 minutes at the rotating speed of 800-1000r/min after each addition, and finally forming composite powder C; S4, liquid phase surface modification, namely pre-mixing 4-12 parts of amino alcohol organic rust inhibitor and 0.5-2.0 parts of hydroxyl end-capped polydimethylsiloxane, uniformly spraying the mixture onto the surface of the composite powder C in a rolling state through an atomization nozzle, and maintaining the temperature of a container at 45-55 ℃ in the spraying process; S5, homogenizing and curing, namely transferring the material subjected to liquid phase surface modification into a homogenizing bin, standing and curing for 24-36 hours at the constant temperature of 50-60 ℃; S6, finally mixing, namely transferring the cured material and 0.3-1.5 parts of hydroxypropyl methyl cellulose into mixing equipment, mixing for 45-60 minutes at a low speed of 50-60r/min, and mixing until the uniformity is more than 98%, thus obtaining a final finished product.
  2. 2. The method for preparing the reinforced concrete corrosion-resistant rust inhibitor according to claim 1, wherein in the step S1, the grinding medium used by the grinding device is zirconia balls, and the particle size ratio of the zirconia balls is 40% of balls with the diameter of 3mm and 60% of balls with the diameter of 5 mm.
  3. 3. The method of claim 1, wherein in step S4, the working pressure of the atomizing nozzle is 0.3-0.6MPa, and the particle size of the atomized liquid drops is not more than 50 μm.
  4. 4. The method of claim 1, wherein in step S5, the relative humidity of the homogenizing bin is controlled below 40%.
  5. 5. The method for preparing the reinforced concrete corrosion-resistant rust inhibitor according to claim 1, wherein the specific surface area of the active silica micropowder is 18000-25000m2/kg, the silica content is not lower than 92%, the viscosity of the hydroxypropyl methylcellulose is 40000-100000 mPa.s, and the calcium carbonate content in the superfine limestone powder is not lower than 95%.
  6. 6. The method for preparing the reinforced concrete corrosion-resistant rust inhibitor according to claim 1, wherein the amino alcohol type organic rust inhibitor is at least one of diethanolamine, triethanolamine and aminobutanol.

Description

Reinforced concrete corrosion-resistant rust inhibitor and preparation method thereof Technical Field The application relates to the technical field of building materials, in particular to an enhanced concrete corrosion-resistant rust inhibitor and a preparation method thereof. Background In the field of constructional engineering, concrete is widely used as a core structural material in the infrastructure of bridges, tunnels, ocean engineering and the like. The facilities are exposed in complex environments such as rainwater, chloride ions, humidity change and the like for a long time, the problems of water seepage of internal pores and invasion of harmful ions are easy to occur, so that corrosion of the steel bars and cracking and peeling of the concrete are caused, and the bearing capacity and the service life of the structure are finally influenced. At present, the corrosion-resistant and rust-resistant products for concrete on the market have the problem of single function, wherein part of the products only focus on inhibiting the corrosion of the steel bars through a single rust-resistant component, but are difficult to effectively improve the compactness and impermeability of the concrete, so that harmful ions can still invade through pores, the products focus on improving the impermeability of the concrete, but lack long-acting inhibition effect on the corrosion of the steel bars, the water-retaining property of the products in the mixing process is not considered, and the molding quality of the concrete is easily influenced by water loss. The product can not simultaneously realize the comprehensive effects of optimizing the internal structure of the concrete, inhibiting the corrosion of the reinforcing steel bars, guaranteeing the mixing water retention and enhancing the impermeability, and is difficult to meet the comprehensive requirements of the infrastructure on the long-term corrosion resistance and the rust resistance of the concrete. Disclosure of Invention The application provides an enhanced concrete corrosion-resistant rust inhibitor and a preparation method thereof, which aim to solve the problems that in the prior art, the concrete corrosion-resistant rust inhibitor has insufficient functional cooperativity, and the structural optimization, the rust resistance of reinforcing steel bars, the mixing water retention and the impermeability are difficult to be considered, and the long-term performance requirements of an infrastructure complex environment can not be met. In a first aspect, the application provides an enhanced concrete corrosion-resistant rust inhibitor, which adopts the following technical scheme: the reinforced concrete corrosion-resistant rust inhibitor is prepared from the following raw materials, by weight, 25-45 parts of active silica micropowder, 15-30 parts of sulphoaluminate cement clinker, 5-15 parts of calcium nitrate, 3-10 parts of sodium molybdate, 4-12 parts of amino alcohol organic rust inhibitor, 0.3-1.5 parts of cellulose ether thickening water retention agent, 0.5-2.0 parts of modified silicone oil water repellent and 10-30 parts of superfine limestone powder. According to the technical scheme, the high volcanic ash activity of the active silica micropowder reacts with cement hydration products to generate more hydrated calcium silicate gel, so that the effect of filling internal pores of concrete and optimizing structural compactness is achieved, the rapid hydration of the sulphoaluminate cement clinker is utilized to generate compact hydration products to play a role of accelerating early structural shaping of the concrete, so that the effect of improving early impervious capacity is achieved, the protective film is formed on the surface of the reinforcing steel by calcium nitrate and sodium molybdate release functional ions, the effect of inhibiting electrochemical corrosion of the reinforcing steel is achieved, the effect of reducing the risk of corrosion of the reinforcing steel is achieved, the amino alcohol organic rust inhibitor is adsorbed on the surface of the reinforcing steel to form a compact adsorption layer, the effect of blocking corrosive medium from contacting the reinforcing steel is achieved, the effect of assisting in enhancing corrosion resistance and long-acting performance is achieved, the water retention property of concrete mixture is improved, the water loss is reduced, the effect of loosening of the structure is avoided due to water loss is achieved, the effect of improving the forming quality of the concrete is achieved, the hydrophobic film is formed inside the concrete by modifying the silicone oil hydrophobic agent, the effect of blocking invasion of moisture and harmful ions is achieved, the effect of improving the penetration of the concrete is achieved, the fine porous structure is further achieved, the effect of improving the integral corrosion resistance of the porous cement is achieved, and the effect of fine porous and t