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Concrete inner surface hydrophobic treatment agent and preparation method thereof

A hydrophobic treatment and concrete internal technology, which is applied in the field of concrete inner surface hydrophobic treatment agent and its preparation, can solve the problems of insufficient durability and high cost, and achieve the effect of high labor intensity, high production cost, convenient transportation and use

Active Publication Date: 2022-03-08
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the deficiencies of the existing concrete internal hydrophobic preparation methods, especially the problems of high cost and insufficient durability, the present invention proposes a concrete internal surface hydrophobic treatment agent and its preparation method

Method used

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  • Concrete inner surface hydrophobic treatment agent and preparation method thereof
  • Concrete inner surface hydrophobic treatment agent and preparation method thereof
  • Concrete inner surface hydrophobic treatment agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1) Use prenol polyoxyethylene ether (TPEG) with a molecular weight of 2400, according to TPEG: hydroxyethyl acrylate: hydrogen peroxide (concentration 27.5%): vitamin C: thioglycolic acid: water = 350: 80: 3: 0.3: 0.4 : The mass ratio of 425 synthesizes the coating solution;

[0052] The synthesis steps are:

[0053] First add 350 parts of prenol polyoxyethylene ether and 300 parts of deionized water into a three-necked flask, and stir at room temperature for 20 minutes to ensure that the prenol polyoxyethylene ether is completely dissolved;

[0054] Add 3 parts of hydrogen peroxide (concentration 27.5%) and stir for 5 minutes;

[0055] Prepare liquid A and liquid B. Among them, liquid A: 0.4 parts of thioglycolic acid, 0.3 parts of vitamin C, and 85 parts of deionized water. Liquid B: 80 parts of hydroxyethyl acrylate, 40 parts of deionized water;

[0056] Both liquid A and liquid B were added dropwise into the three-necked flask, wherein liquid A was added dropwis...

Embodiment 2

[0078] 1) Prenol polyoxyethylene ether (TPEG) with a molecular weight of 3000 is used, according to TPEG: hydroxybutyl acrylate: ammonium persulfate: ferrous sulfate heptahydrate: mercaptopropionic acid: water = 330: 100: 2: 0.2: 0.3:435 mass ratio, the coating solution is synthesized;

[0079] The synthesis steps are,

[0080] First add 330 parts of prenol polyoxyethylene ether and 310 parts of deionized water into a three-necked flask, and stir for 20 minutes at room temperature to ensure that the prenol polyoxyethylene ether is completely dissolved; add 2 parts of ammonium persulfate and stir for 5 minute;

[0081] Prepare liquid A and liquid B. Wherein, liquid A: 0.3 parts of thioglycolic acid, 0.2 parts of ferrous sulfate, and 85 parts of deionized water. Liquid B: 100 parts of hydroxybutyl acrylate, 40 parts of deionized water;

[0082] Both liquid A and liquid B are added dropwise into the three-necked flask, wherein liquid A is added dropwise for 3 hours, and liqui...

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Abstract

The invention relates to a hydrophobic treatment agent for the inner surface of concrete and a preparation method thereof, in particular to a technology for coating hydrophobic shell-based powder by using a water-soluble polymer substance, which is technically characterized in that the hydrophobic shell-based powder coated by a slow-release biopolymer is added into the concrete when the concrete is mixed, and then the concrete is uniformly mixed. According to the method, a hydrophobic surface can be formed in the concrete, invasion of external erosion ions is prevented, so that the durability of the concrete is improved, and the final commercialization form is powder which is convenient to store, transport and use.

Description

technical field [0001] The invention relates to a hydrophobic treatment agent for the inner surface of concrete and a preparation method thereof, in particular to a method for coating hydrophobic shell-based powder with a water-soluble polymer to achieve hydrophobicity on the inner surface of concrete. Background technique [0002] With the rapid development of coastal cities, coastal engineering has also been developed rapidly. However, in the special marine environment, concrete is susceptible to corrosion by chloride ions and sulfate ions in seawater, which greatly reduces its durability and life, and significantly increases maintenance costs. Among them, chloride ions will cause serious corrosion of steel bars, and sulfate ions will cause concrete to produce gypsum-type, ettringite or carbon-sulfur-sulphate-type sulfate erosion, which will cause concrete expansion and cracking, and even greatly reduce the service period. Therefore, in the marine environment, the intrusi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C08F283/06C08F220/20C04B103/65
CPCC04B40/0046C08F283/065C04B2103/65C08F220/20C04B24/2647C04B14/28C04B24/42
Inventor 宋远明周正王志娟
Owner YANTAI UNIV
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