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Concrete low-water-absorption protecting agent, preparation method and application method thereof

A low water absorption, protective agent technology, applied in coatings, anti-corrosion coatings, etc., can solve the problems of coating deformation and falling off, lack of air permeability, and inability to protect concrete for a long time, achieve simple production equipment and improve durability. The effect of sex and convenient operation process

Inactive Publication Date: 2018-07-06
CCCC FOURTH HARBOR ENG INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this protective agent will cause the coating to deform and fall off due to its lack of air permeability, and cannot achieve the purpose of protecting the concrete for a long time.

Method used

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  • Concrete low-water-absorption protecting agent, preparation method and application method thereof
  • Concrete low-water-absorption protecting agent, preparation method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An ultra-low water absorption concrete protective agent prepared by the following method:

[0024] (1) Make ingredients according to Table 1.

[0025] (2) Mix 150g of the composite inorganic filler and add it to water to disperse at a high speed of 1000 rpm for 80 minutes, then reduce the dispersion speed to 600 rpm, and then add silicone emulsion BS43N150g and silicone acrylic emulsion A-79 ( B) 300g, 15g of thickener hydroxyethyl cellulose, 15g of MV preservative, and stirring for 40 minutes, you can get an ultra-low water absorption concrete protective agent.

[0026] Performance Testing:

[0027] Coated on the surface of concrete, the water absorption rate (48h) is 93% lower than the reference specimen; the artificial weather resistance (5000h) is apparently intact; the water resistance (192h) is apparently intact.

Embodiment 2

[0029] An ultra-low water absorption concrete protective agent prepared by the following method:

[0030] (1) Make ingredients according to Table 1.

[0031] (2) Mix 280g of the composite inorganic filler and add it to water to disperse at a high speed of 1200 rpm for 70 minutes, then reduce the dispersion speed to 500 rpm, and then add silicone emulsion BS45130g and silicone acrylic emulsion A-79 ( B) 280g, 24g of hydroxyethyl cellulose thickener, 20g of MV preservative, etc., stir for 50 minutes, and then you can get a super low water absorption concrete protective agent.

[0032] Performance Testing:

[0033] Coated on the surface of concrete, the water absorption rate (48h) is 85% lower than the reference specimen; the artificial weather resistance (5500h) is apparently intact; the water resistance (192h) is apparently intact.

Embodiment 3

[0035] An ultra-low water absorption concrete protective agent prepared by the following method:

[0036] (1) Make ingredients according to Table 1.

[0037] (2) Mix 235g of the composite inorganic filler and add it to water and disperse at a high speed of 1100 rpm for 75 minutes, then reduce the dispersion speed to 550 rpm, and then add silicone emulsion BS43N140g and silicone acrylic emulsion A-79 ( B) 250g, 16g of hydroxyethyl cellulose thickener, 18g of MV preservative, and stirring for 55 minutes, you can get a super-low water absorption concrete protective agent.

[0038] Performance Testing:

[0039] Coated on the surface of concrete, the water absorption rate (48h) is 94% lower than the reference specimen; the artificial weather resistance (5000h) is apparently intact; the water resistance (192h) is apparently intact.

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Abstract

The invention discloses a concrete low-water-absorption protecting agent, a preparation method and an application method thereof. The preparation method comprises the following steps: uniformly premixing composite inorganic filler; adding water; dispersing at high speed for 60-80min; then sequentially adding organosilicone emulsion, modified pure acrylic emulsion, a thickening agent and a preservative; stirring to uniform mix; and dispersing and stirring for 40-60min at low speed to obtain ultra-low water-absorption bare concrete protecting agent, wherein the composite inorganic filter is a mixture of sericite, calcium carbonate, titanium dioxide and fumed silica; the composite inorganic filler accounts for 15-30% of the total mass; the organosilicone emulsion accounts for 10-15% of the total mass; the modified pure acrylic emulsion accounts for 20-30% of the total mass. The prepared ultra-low water-absorption bare concrete protecting agent overcomes the shortages of existing bare concrete which is easy to suck water and easily discolored due to microorganism attaching, has the characteristics of being waterproofing, breathing, and resistant to environment change, and is capable ofobviously improving the durability of the bare concrete.

Description

Technical field [0001] The invention relates to the field of fair-faced concrete protective agents, in particular to a super-low water absorption rate fair-faced concrete protective agent and a preparation method thereof. Background technique [0002] With the rapid development of society, concrete structures play an increasingly important role in urban construction. As a new type of concrete emerging in recent years, fair-faced concrete has received more and more attention due to its unique concrete texture and color. The concrete is a porous structure with strong water absorption characteristics. Concrete will cause the corrosion of steel bars due to the entry of moisture and cause the durability to decrease, and the entry of moisture will cause the growth of bacteria and cause the discoloration of the fair-faced concrete and lose the original Color and texture. Therefore, it is necessary to increase the hydrophobicity of fair-faced concrete structures and reduce their water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/04C09D183/04C09D5/08C09D7/61C09D7/43
CPCC08K2003/2241C08K2201/014C08L2205/03C09D5/08C09D143/04C08L83/04C08L1/284C08K3/34C08K3/22C08K3/36C08K3/00
Inventor 唐诗王胜年岑文杰范志宏熊建波张夏虹
Owner CCCC FOURTH HARBOR ENG INST
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