Magnesium phosphate cementitious protective coating for concrete clear water finish and preparation method thereof

A magnesium phosphate cement and protective coating technology, applied in the field of building materials, can solve the problems of poor adhesion and volume stability of inorganic Portland cement coatings, easy aging and volatilization of organic coatings, affecting the environment and human health. and other problems, to achieve the effect of solving the surface fouling of concrete structures, improving durability and excellent adhesion

Active Publication Date: 2020-11-27
ANHUI UNIVERSITY OF ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, inorganic Portland cement coatings have poor adhesion and volume stability, and are prone to shrinkage and cracking; organic coatings are prone to aging and volatilization, which affects the environment and human health.

Method used

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  • Magnesium phosphate cementitious protective coating for concrete clear water finish and preparation method thereof
  • Magnesium phosphate cementitious protective coating for concrete clear water finish and preparation method thereof
  • Magnesium phosphate cementitious protective coating for concrete clear water finish and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A magnesium phosphate cementitious protective coating for concrete clear water finish, prepared by the following method:

[0027] 1) The raw material ratio of the bottom coating: the mass ratio of magnesium oxide, potassium dihydrogen phosphate, borax, Portland cement, and fly ash is 57:20:4:4:15, and the content of cellulose ether is all the above materials 0.03% of the total mass, water-solid ratio = 0.3; the surface coating is a silane emulsion, and the mass percentages of each raw material are: 65% of octyltriethoxysilane, 2% of sodium dodecylsulfonate, and the balance is to Ionized water, after mixing the raw material components, was emulsified by ultrasonic (ultrasonic condition: 40kHz×100W, 20min) to prepare silane emulsion;

[0028] 2) Pour the weighed magnesium oxide, potassium dihydrogen phosphate, borax, Portland cement, fly ash and cellulose ether into the mortar mixer and dry mix for 3 to 5 minutes to obtain the concrete clear water facing magnesium phospha...

Embodiment 2

[0046] A magnesium phosphate cementitious protective coating for concrete clear water finish, prepared by the following method:

[0047] 1) Proportion of bottom coating: the mass ratio of magnesium oxide, potassium dihydrogen phosphate, borax, Portland cement, and fly ash is 54:18:4:4:20, and the content of cellulose ether is the total of all the above materials. 0.03% by mass, water-solid ratio = 0.3; the surface coating is silane emulsion, and the mass percentage of each raw material is: octyltriethoxysilane 65%, sodium dodecylsulfonate 2%, and the balance is deionized Water, after mixing the raw material components, using ultrasonic (ultrasonic condition: 40kHz×100W, 20min) emulsification to prepare silane emulsion;

[0048] 2) Pour the weighed magnesium oxide, potassium dihydrogen phosphate, borax, Portland cement, fly ash and cellulose ether into the mortar mixer and dry mix for 3 to 5 minutes to obtain the concrete clear water facing magnesium phosphate cementitious Prote...

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to a magnesium-phosphate cementum protection coating for a concrete clear water facing and a preparing method thereof. The protection coating is composed of a bottom coating and a surface coating, wherein the bottom coating is prepared from, by mass, 45%-60% of magnesium oxide, 15%-25% of monopotassium phosphate, 3%-5% of borax, 3%-5% of portland cement, 10%-20% of fly ash and 0.02% to 0.04% of cellulose ether, and the water-solid ratio is 0.2 to 0.5; the surface coating is silane emulsion, and is prepared in a manner that octyl triethoxysilane, sodium dodecyl sulfate and water serve as raw materials and are subjected to ultrasonic emulsification. The magnesium-phosphate cementum protection coatinghas the excellent cohesive property, volume stability, application property and weather resistance, the durability of a concrete structure material can be effectively improved, the problems that thesurface of a concrete structure serving in the natural environment is stained, and the durability is reduced are effectively solved, and the protection coating has the practical application value.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a magnesium phosphate cementitious protective coating for concrete clear water finish and a preparation method thereof. Background technique [0002] Concrete structures serving in natural environments are vulnerable to the erosion of harmful media, resulting in surface fouling and reduced structural durability, thus affecting the appearance and service life of concrete structures. In order to improve the appearance and service life of concrete structures in the service environment, concrete finishing coatings are often used for treatment. At present, the most commonly used concrete finishing coatings are mainly inorganic Portland cement coatings and organic polymer coatings such as polyurea, epoxy resin, and silane. Although the above coatings can improve the durability of concrete structures, there are certain problems. Among them, inorganic Portland ce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/71
CPCC04B41/52C04B41/71C04B41/5079C04B41/5006C04B41/5015C04B41/5029C04B41/4598C04B41/4803C04B41/4535C04B41/4922C04B41/4543
Inventor 张高展丁庆军张勇张晓佳魏琦
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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