High-weather-resistant bare concrete protection agent and application method thereof

A technology of fair-faced concrete and protective agent, applied in the field of fair-faced concrete protective agent, can solve the problems of reduced durability, water absorption, discoloration, etc., and achieve the effects of no post-treatment, improved durability, and simple production equipment

Inactive Publication Date: 2018-04-13
CCCC FOURTH HARBOR ENG INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of existing fair-faced concrete affected by the environment, such as water absorption, discoloration, and reduced durability, and provide a high-weather-resistant clear-faced concrete protective agent and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A high weather resistance clear-faced concrete protective agent is prepared by the following method:

[0021] Mix the composite inorganic filler (200g) into water and disperse at a high speed of 3500 rpm for 40 minutes, then reduce the dispersion speed to 250 rpm, then add silicone emulsion BS45 (250g) and silicone acrylic emulsion A-79 in sequence (B) (280g), thickener hydroxypropyl methylcellulose (10g), leveling agent 203 (8g), preservative (11g), etc., stir for 20 minutes, and you can get high weather resistance fair-faced concrete protection agent.

[0022] Composite inorganic filler ratio according to the following table 1:

[0023] Table 1

[0024] name

Proportion of mass (%)

Sericite

15

calcium carbonate

50

Kaolin

10

Titanium dioxide

5

AEROSIL 200 Hydrophilic Fumed Silica

20

[0025] Performance Testing

[0026] The clear-faced concrete protective agent with high weather resistance is coated...

Embodiment 2

[0028] A high weather resistance clear-faced concrete protective agent is prepared by the following method:

[0029] Mix the composite inorganic filler (260g) into water and disperse for 40 minutes at a high speed of 4200 rpm, then reduce the dispersion speed to 300 rpm, then add silicone emulsion BS43N (200g) and silicone acrylic emulsion A-79 ( B) (240g), thickener hydroxypropyl methylcellulose (12g), leveling agent 203 (10g), preservative (9g), etc., stir for 20 minutes, and you can get a high weather resistance fair-faced concrete protective agent .

[0030] Performance Testing

[0031] Coated on the concrete surface, the water absorption rate (48h) is 86% lower than that of the reference specimen; the artificial weather resistance (5500h) is apparently intact; the water resistance (192h) is apparently intact; the contact angle is 121°, and the artificial weather resistance (5500h) is intact; ) The back contact angle is 98°. After 72 hours of standing still, there is a ...

Embodiment 3

[0036] A high-weather-resistant clear-faced concrete protective agent is prepared by the following method:

[0037] Mix the composite inorganic filler (255g) into water and disperse at a high speed of 5000 rpm for 40 minutes, then reduce the dispersion speed to 350 rpm, then add silicone emulsion BS45 (260g) and silicone acrylic emulsion A-79 in sequence (B) (320g), thickener hydroxyethyl cellulose (16g), leveling agent 2020 (13g), preservative (12g), etc., stir for 20 minutes to get a high weather resistance fair-faced concrete protective agent.

[0038] Performance Testing

[0039] Coated on the concrete surface, the water absorption rate (48h) is 92.8% lower than that of the benchmark specimen; the artificial weather resistance (6000h) is apparently intact; the water resistance (192h) is apparently intact; the contact angle is 132°, and the artificial weather resistance (6000h) is intact; ) The back contact angle is 107°. After 72 hours of standing still, there is a pheno...

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PUM

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Abstract

The invention discloses a high-weather-resistant bare concrete protection agent which comprises, in weight percent, 20-45% of composite inorganic fillers, 15-30% of organic silicone emulsion, 10-30% of silicone acrylic emulsion, 1-3% of thickening agents, 0.2-1.5% of flatting agents and 0.5-2.0% of preservatives. The composite inorganic fillers are compounds of sericite, calcium carbonate, kaolin,hydrophilic air-phase silicon dioxide and titanium dioxide. The bare concrete protection agent is applied to protection of bare concrete has the advantages that the protection agent is good in waterproof and breathable effect and resistant in ultraviolet irradiation, durability of the bare concrete can be remarkably improved, and discoloring and falling of protection layers are omitted. Production devices of the bare concrete protection agent are simple and less in energy consumption, green and environmentally friendly, by-products are avoided, and post-treatment is omitted.

Description

technical field [0001] The invention relates to the field of fair-faced concrete protective agents. Background technique [0002] With the vigorous development of infrastructure, concrete has played an increasingly important role in ports, docks, and urban roads. In recent years, with the rapid development of modern concrete technology, fair-faced concrete has received more and more attention because of its concrete qualities. However, due to the characteristics of its material structure, concrete is easy to absorb water, and the color will change due to mildew on the surface due to the attachment of microorganisms, losing the true color of fair-faced concrete. At the same time, due to the entry of water, the mechanical strength of concrete will also change. Therefore need to coat a kind of protective agent on the surface of clear-water concrete, reduce the water absorption of clear-water concrete, improve its durability. [0003] Publication No. CN106193338A discloses a c...

Claims

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Application Information

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IPC IPC(8): C04B41/68
CPCC04B41/5041C04B41/68C04B41/5037C04B41/5035C04B41/501C04B41/5027C04B41/495C04B41/4803C04B41/4539
Inventor 唐诗王胜年张夏虹范志宏熊建波岑文杰
Owner CCCC FOURTH HARBOR ENG INST
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