CN106518160B - A kind of weather-proof semi-permeable type clear-water concrete protective agent and preparation method thereof of breathing freely - Google Patents
A kind of weather-proof semi-permeable type clear-water concrete protective agent and preparation method thereof of breathing freely Download PDFInfo
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- CN106518160B CN106518160B CN201610841954.4A CN201610841954A CN106518160B CN 106518160 B CN106518160 B CN 106518160B CN 201610841954 A CN201610841954 A CN 201610841954A CN 106518160 B CN106518160 B CN 106518160B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
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- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
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Abstract
The present invention provides a kind of weather-proof semi-permeable type clear-water concrete protective agent of breathing freely; including aqueous epoxy resins, the epoxy resin containing hydrophobic granule, aqueous polyurethane, polyurethane-modified polyacrylate, nano-titanium dioxide, 1; 3-propanediol, sodium hydroxide, hydroxypropyl methyl cellulose and water; specific preparation method; the following steps are included: micron-sized modified organic silicone resin is added in emulsifier TOA aqueous solution; sonic oscillation, heating stirring form organic siliconresin dispersion liquid；Organic siliconresin dispersion liquid is added in dispersing agent, inorganic salts and deionized water, is sufficiently stirred, photocatalyst and thickener, high-speed stirred are eventually adding, standing obtains product.The Concrete Protective Agent part of this method preparation is deep into inside concrete, partially forms film in concrete surface, and the film is not easy bubble and falls off.
Description
Technical field
The invention belongs to the field of building materials, and in particular to a kind of weather-proof semi-permeable type clear-water concrete protective agent of breathing freely
And preparation method thereof.
Background technique
With the continuous improvement of environmentally protective consciousness, the application field of clear-water concrete is gradually from road and bridge workshop
And airport, develop to industry and civil buildings direction.Clear-water concrete is a kind of architectural concrete, is exactly directlyed adopt cast-in-place mixed
The smooth surface, uniform color, sharp-featured surface of soil self-assembling formation are coagulated as facing, are only coated on surface transparent
Protective agent.The preparation process and cost of clear-water concrete are higher than normal concrete, therefore improve the durability of clear-water concrete
It is particularly important.
Concrete is formed by cement, aggregate and part of auxiliary mixing after-pouring, when concrete is exposed to atmosphere dirt for a long time
In the adverse circumstances such as dye, ultraviolet light, acid rain, the protective layer of concrete is carbonized, chloride corrosion, then generates crack, is influenced
Presentation quality and durability.It therefore is usually that the durable of clear-water concrete is improved using the method for later period repairing and coating protection agent
Property.A kind of protective agent for clear-water concrete disclosed in Chinese patent CN 103922800A, including priming paint, mid-term and finishing coat,
Priming paint is organosilicon polymer, and middle paint is made of self-crosslinking polymer, water, pigment, filler and other auxiliary agents, and finishing coat is fluorine silicon
Resinous polymer assigns concrete water-proof anticorrosion weatherability automatically cleaning and other effects by the synergy of three level paints.China
A kind of water base protectant preparation method of permeable concrete, the water base osmosis type coagulation disclosed in patent CN 103214265B
Native protective agent includes Potassium aluminum sulfate dodecahydrate, sodium hydroxide, citric acid, silane coupling agent, sodium silicate aqueous solution and deionized water,
The protective agent of preparation does not form a film in concrete surface, but directly penetrates into inside concrete, the free alkali with inside concrete
Reaction produces complicated and confused shape crystal, fills capillary porosity and the micro chink of concrete, improves the waterproof and anticorrosion effect of concrete, mention
High-durability.A kind of Concrete Protective Agent disclosed in Chinese patent CN 102633462B and its preparation method and application, the coagulation
Native protective agent includes vinyl acetate polymer dispersable adhesive powder, propylene glycol Ricinate, ammonium persulfate stabilizer, anhydrous carbon
Sour sodium, tartaric acid and water, the polymer in the Concrete Protective Agent of preparation penetrate into inside concrete by Ricinate, mention
The toughness of high concrete, and hydrated product calcium hydroxide reaction in alkali and concrete, generate the interior of crystalline solid fill concrete
Portion's hole improves the erosion resistance, anticracking ability and durability of concrete, and nontoxic and pollution-free.
By the above-mentioned prior art it is found that clear-water concrete protective agent is osmosis type and two kinds of film-type, osmosis type protective agent
The permeability of concrete is influenced, and weatherability is poor, film-type weatherability and good permeability, but film is easy bubble and falls off,
Therefore preparing a kind of clear-water concrete protective agent weather-proof but also strong with concrete binding force of not only having breathed freely is particularly important.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of semi-permeable type clear-water concrete protective agent for breathing freely weather-proof and
Preparation method, mainly using aqueous epoxy resins, the epoxy resin containing hydrophobic granule, aqueous polyurethane and polyurethane-modified poly-
Acrylate as primary raw material, in conjunction with nano-titanium dioxide, 1,3-PD, sodium hydroxide, hydroxypropyl methyl cellulose and
Weather-proof semi-permeable type clear-water concrete protective agent of breathing freely is prepared in water.The weather-proof semi-permeable type of breathing freely of this method preparation is clear
Water coagulation soil protective agent contains hydrophobic ingredient and hydrophilic component, therefore part protective agent is deep into inside concrete, and part is protected
Agent forms film in concrete surface, and the film is not easy bubble and falls off, therefore has both osmosis type and film-type is protectant excellent
Gesture has ventilative, weatherability performance, effectively prevent the corrosion and carbonization of clear-water concrete, comprehensive to provide the durable of concrete
Property.
In order to solve the above technical problems, the technical scheme is that
A kind of weather-proof semi-permeable type clear-water concrete protective agent of breathing freely, the weather-proof semi-permeable type clear water coagulation of breathing freely
Native protective agent includes that modified resin, dispersing agent, light touching coal, alkali, thickener and deionized water, the modified resin are modified epoxy
Resin and modified polyurethane, the modified epoxy include aqueous epoxy resins and water-insoluble epoxy resin, described non-
Water-soluble epoxy resin is the epoxy resin containing hydrophobic granule, and the modified polyurethane includes aqueous polyurethane and water-insoluble poly-
Urethane, the hydrophobic polyurethane be polyurethane-modified polyacrylate, the photocatalyst be nano-titanium dioxide, described point
Powder is 1,3-PD, and the alkali is sodium hydroxide, and the thickener is hydroxypropyl methyl cellulose.
As a preferred embodiment of the above technical solution, the component of the weather-proof semi-permeable type clear-water concrete protective agent of breathing freely,
By weight, including 25-35 parts of modified resin, 15-20 parts of dispersing agent, light touch coal 3-5 parts, 8-12 parts of alkali, thickener 6-10
Part and deionized water 50-70 parts.
As a preferred embodiment of the above technical solution, in the modified resin modified epoxy and modified polyurethane quality
Than for 1:0.7-1.2.
As a preferred embodiment of the above technical solution, aqueous epoxy resins and water-insoluble asphalt mixtures modified by epoxy resin in the modified epoxy
The mass ratio of rouge is 1:0.3-0.5.
As a preferred embodiment of the above technical solution, in the modified polyurethane aqueous polyurethane and hydrophobic polyurethane matter
Amount is than being 1:3-6.
The present invention also provides a kind of preparation method of weather-proof semi-permeable type clear-water concrete protective agent of breathing freely, including it is following
Step:
(1) micron-sized modified resin is added in emulsifier TOA aqueous solution, sonic oscillation, heating stirring forms resin
Dispersion liquid；
(2) dispersing agent is added, in alkali and deionized water in the resin dispersion liquid of step (1) preparation, is sufficiently stirred, finally plus
Enter photocatalyst and thickener, high-speed stirred, standing obtains weather-proof semi-permeable type clear-water concrete protective agent of breathing freely.
As a preferred embodiment of the above technical solution, in the step (1), the partial size of micron-sized modified resin is 100-600 μ
m。
As a preferred embodiment of the above technical solution, in the step (1), micron-sized modified resin and emulsifier TOA are water-soluble
The solid-liquid ratio of liquid is 1g:10-15ml.
As a preferred embodiment of the above technical solution, in the step (1), the frequency of sonic oscillation is 25-40KHz, and the time is
30-45min, the temperature of heating are 60-80 DEG C.
As a preferred embodiment of the above technical solution, in the step (2), the semi-permeable type clear-water concrete for breathing freely weather-proof is protected
The application method of agent are as follows: after the completion of pouring exposed concrete, the semi-permeable type clear-water concrete protective agent for breathing freely weather-proof is sprayed
It is spread across the surface of concrete, until concrete surface is all soaked, is stood, until the semi-permeable type clear-water concrete for breathing freely weather-proof is protected
Shield agent is absorbed by concrete completely, can be sprayed 2-3 times repeatedly.
Compared with prior art, the invention has the following advantages:
(1) weather-proof semi-permeable type clear-water concrete protective agent prepared by the present invention of breathing freely contain hydrophobic polymer ingredient and
Hydrophilic polymer ingredient, hydrophilic polymer can be deeply infiltrated into the hole of concrete, increase the toughness of concrete, hydrophobic poly-
Close object partial penetration arrive concrete hole, partially concrete surface formed film, therefore hydrophobic polymer formation
The binding force of film and concrete is strong, it is not easy to which fall off bubble, and hydrophobic polymer ingredient and hydrophilic polymer grain diameter of components
Smaller, penetrating power is strong, strong with the binding force of concrete.
(2) weather-proof semi-permeable type clear-water concrete protective agent prepared by the present invention of breathing freely contain hydrophobic polymer ingredient and
Hydrophilic polymer ingredient, part protective agent are deep into inside concrete, and part protective agent forms film in concrete surface, and should
Film is not easy bubble and falls off, therefore has both osmosis type and the protectant advantage of film-type, has ventilative, weatherability performance, has
Effect prevents the corrosion and carbonization of clear-water concrete, comprehensive to provide the durability of concrete.
(3) contain nano-titanium dioxide light in weather-proof semi-permeable type clear-water concrete protective agent prepared by the present invention of breathing freely
Coal is touched, the partial impurities for being attached to faced concrete surface can be catalytically decomposed, reach self-cleaning purpose.
(4) weather-proof semi-permeable type clear-water concrete protective agent prepared by the present invention of breathing freely is environmentally protective, good penetrability, at
Film property is high, breathes freely transparent, waterproof, anti-corrosion, automatically cleaning, and usability is good.
Specific embodiment
Below in conjunction with specific embodiment, the present invention will be described in detail, herein illustrative examples and explanation of the invention
For explaining the present invention, but it is not as a limitation of the invention.
Embodiment 1:
(1) mass ratio is mixed to form modified epoxy tree for the aqueous epoxy resins of 1:0.3 and water-insoluble epoxy resin
Mass ratio is that 1:3 aqueous polyurethane and hydrophobic polyurethane are mixed to form modified polyurethane, is then 1 by mass ratio by rouge:
0.7 modified epoxy and modified polyurethane are mixed to form the modified resin that partial size is 100 μm, are 1g with solid-liquid ratio:
10ml is added in emulsifier TOA aqueous solution, vibrates 30min with 25KHz frequency ultrasound, heating stirring forms resin point at 60 DEG C
Dispersion liquid.
(2) by weight, 15 parts of 1,3-PD dispersing agent, 8 parts of hydrogen-oxygen will be added containing 25 parts of resin dispersion liquids
Change in soda and 50 parts of deionized water, is sufficiently stirred, is eventually adding 3 parts of nano-titania photocatalyst and 6 parts of hydroxypropyl
Ylmethyl cellulose thickener, high-speed stirred, standing obtain weather-proof semi-permeable type clear-water concrete protective agent of breathing freely.
(3) after the completion of pouring exposed concrete, the weather-proof semi-permeable type clear-water concrete protective agent that will breathe freely is sprayed onto
The surface of concrete is stood, until concrete surface is all soaked until weather-proof semi-permeable type clear-water concrete protective agent of breathing freely
It is absorbed, can spray repeatedly 2 times by concrete completely.
Embodiment 2:
(1) mass ratio is mixed to form modified epoxy tree for the aqueous epoxy resins of 1:0.5 and water-insoluble epoxy resin
Mass ratio is that 1:6 aqueous polyurethane and hydrophobic polyurethane are mixed to form modified polyurethane, is then 1 by mass ratio by rouge:
1.2 modified epoxy and modified polyurethane are mixed to form the modified resin that partial size is 600 μm, are 1g with solid-liquid ratio:
15ml is added in emulsifier TOA aqueous solution, vibrates 45min with 40KHz frequency ultrasound, heating stirring forms resin point at 80 DEG C
Dispersion liquid.
(2) by weight, 20 parts of 1,3-PD dispersing agent, 12 parts of hydrogen-oxygen will be added containing 35 parts of resin dispersion liquids
Change in soda and 70 parts of deionized water, is sufficiently stirred, is eventually adding 5 parts of nano-titania photocatalyst and 10 parts of hydroxypropyl
Ylmethyl cellulose thickener, high-speed stirred, standing obtain weather-proof semi-permeable type clear-water concrete protective agent of breathing freely.
(3) after the completion of pouring exposed concrete, the weather-proof semi-permeable type clear-water concrete protective agent that will breathe freely is sprayed onto
The surface of concrete is stood, until concrete surface is all soaked until weather-proof semi-permeable type clear-water concrete protective agent of breathing freely
It is absorbed, can spray repeatedly 3 times by concrete completely.
Embodiment 3:
(1) mass ratio is mixed to form modified epoxy tree for the aqueous epoxy resins of 1:0.4 and water-insoluble epoxy resin
Mass ratio is that 1:4 aqueous polyurethane and hydrophobic polyurethane are mixed to form modified polyurethane, is then 1 by mass ratio by rouge:
0.8 modified epoxy and modified polyurethane are mixed to form the modified resin that partial size is 300 μm, are 1g with solid-liquid ratio:
12ml is added in emulsifier TOA aqueous solution, vibrates 35min with 30KHz frequency ultrasound, heating stirring forms resin point at 70 DEG C
Dispersion liquid.
(2) by weight, 17 parts of 1,3-PD dispersing agent, 10 parts of hydrogen-oxygen will be added containing 30 parts of resin dispersion liquids
Change in soda and 60 parts of deionized water, is sufficiently stirred, is eventually adding 4 parts of nano-titania photocatalyst and 8 parts of hydroxypropyl
Ylmethyl cellulose thickener, high-speed stirred, standing obtain weather-proof semi-permeable type clear-water concrete protective agent of breathing freely.
(3) after the completion of pouring exposed concrete, the weather-proof semi-permeable type clear-water concrete protective agent that will breathe freely is sprayed onto
The surface of concrete is stood, until concrete surface is all soaked until weather-proof semi-permeable type clear-water concrete protective agent of breathing freely
It is absorbed, can spray repeatedly 2 times by concrete completely.
Embodiment 4:
(1) mass ratio is mixed to form modified epoxy tree for the aqueous epoxy resins of 1:0.3 and water-insoluble epoxy resin
Mass ratio is that 1:5 aqueous polyurethane and hydrophobic polyurethane are mixed to form modified polyurethane, is then 1 by mass ratio by rouge:
1 modified epoxy and modified polyurethane are mixed to form the modified resin that partial size is 500 μm, are 1g:13ml with solid-liquid ratio,
It is added in emulsifier TOA aqueous solution, 40min is vibrated with 35KHz frequency ultrasound, heating stirring forms resin dispersion liquid at 75 DEG C.
(2) by weight, 15 parts of 1,3-PD dispersing agent, 8-12 parts of hydrogen will be added containing 30 parts of resin dispersion liquids
It aoxidizes in soda and 65 parts of deionized water, is sufficiently stirred, is eventually adding 5 parts of nano-titania photocatalyst and 8 parts of hydroxyl
Propyl methocel thickener, high-speed stirred, standing obtain weather-proof semi-permeable type clear-water concrete protective agent of breathing freely.
(3) after the completion of pouring exposed concrete, the weather-proof semi-permeable type clear-water concrete protective agent that will breathe freely is sprayed onto
The surface of concrete is stood, until concrete surface is all soaked until weather-proof semi-permeable type clear-water concrete protective agent of breathing freely
It is absorbed, can spray repeatedly 3 times by concrete completely.
Embodiment 5:
(1) mass ratio is mixed to form modified epoxy tree for the aqueous epoxy resins of 1:0.5 and water-insoluble epoxy resin
Mass ratio is that 1:3 aqueous polyurethane and hydrophobic polyurethane are mixed to form modified polyurethane, is then 1 by mass ratio by rouge:
0.9 modified epoxy and modified polyurethane are mixed to form the modified resin that partial size is 450 μm, are 1g with solid-liquid ratio:
13ml is added in emulsifier TOA aqueous solution, vibrates 35min with 35KHz frequency ultrasound, heating stirring forms resin point at 70 DEG C
Dispersion liquid.
(2) by weight, 15 parts of 1,3-PD dispersing agent, 11 parts of hydrogen-oxygen will be added containing 30 parts of resin dispersion liquids
Change in soda and 55 parts of deionized water, is sufficiently stirred, is eventually adding 5 parts of nano-titania photocatalyst and 7 parts of hydroxypropyl
Ylmethyl cellulose thickener, high-speed stirred, standing obtain weather-proof semi-permeable type clear-water concrete protective agent of breathing freely.
(3) after the completion of pouring exposed concrete, the weather-proof semi-permeable type clear-water concrete protective agent that will breathe freely is sprayed onto
The surface of concrete is stood, until concrete surface is all soaked until weather-proof semi-permeable type clear-water concrete protective agent of breathing freely
It is absorbed, can spray repeatedly 3 times by concrete completely.
Embodiment 6:
(1) mass ratio is mixed to form modified epoxy tree for 10.5 aqueous epoxy resins and water-insoluble epoxy resin
Mass ratio is that 1:5 aqueous polyurethane and hydrophobic polyurethane are mixed to form modified polyurethane, is then 1 by mass ratio by rouge:
1.1 modified epoxy and modified polyurethane are mixed to form the modified resin that partial size is 450 μm, are 1g with solid-liquid ratio:
15ml is added in emulsifier TOA aqueous solution, vibrates 45min with 25KHz frequency ultrasound, heating stirring forms resin point at 70 DEG C
Dispersion liquid.
(2) by weight, 15 parts of 1,3-PD dispersing agent, 12 parts of hydrogen-oxygen will be added containing 35 parts of resin dispersion liquids
Change in soda and 60 parts of deionized water, is sufficiently stirred, is eventually adding 4 parts of nano-titania photocatalyst and 9 parts of hydroxypropyl
Ylmethyl cellulose thickener, high-speed stirred, standing obtain weather-proof semi-permeable type clear-water concrete protective agent of breathing freely.
(3) after the completion of pouring exposed concrete, the weather-proof semi-permeable type clear-water concrete protective agent that will breathe freely is sprayed onto
The surface of concrete is stood, until concrete surface is all soaked until weather-proof semi-permeable type clear-water concrete protective agent of breathing freely
It is absorbed, can spray repeatedly 2 times by concrete completely.
Through detecting, the concrete through the coating of semi-permeable type clear-water concrete protective agent of embodiment 1-6 preparation is through polluting
The result of waterproof, anticorrosion, automatically cleaning and durability after object pollution is as follows:
As seen from the above table, the water proof anti-soil anti-chloride ion corrosion of semi-permeable type clear-water concrete protective agent prepared by the present invention
Effect is good, and the scaling amount after freeze thawing treatment is small, and durability is good.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (10)
1. a kind of weather-proof semi-permeable type clear-water concrete protective agent of breathing freely, it is characterised in that: it is described breathe freely it is weather-proof semi-permeable
Type clear-water concrete protective agent includes modified resin, dispersing agent, light touching coal, alkali, thickener and deionized water, the modified resin
For modified epoxy and modified polyurethane, the modified epoxy includes aqueous epoxy resins and water-insoluble asphalt mixtures modified by epoxy resin
Rouge, the water-insoluble epoxy resin be the epoxy resin containing hydrophobic granule, the modified polyurethane include aqueous polyurethane and
Hydrophobic polyurethane, the hydrophobic polyurethane are polyurethane-modified polyacrylate, and the photocatalyst is nano-silica
Change titanium, the dispersing agent is 1,3-PD, and the alkali is sodium hydroxide, and the thickener is hydroxypropyl methyl cellulose.
2. a kind of weather-proof semi-permeable type clear-water concrete protective agent of breathing freely according to claim 1, it is characterised in that: institute
State the component for weather-proof semi-permeable type clear-water concrete protective agent of breathing freely, by weight, including 25-35 parts of modified resin, point
15-20 parts of powder, coal 3-5 parts of light touching, 8-12 parts of alkali, 6-10 parts of thickener and 50-70 parts of deionized water.
3. a kind of weather-proof semi-permeable type clear-water concrete protective agent of breathing freely according to claim 1 or 2, feature exist
In: the mass ratio of modified epoxy and modified polyurethane is 1:0.7-1.2 in the modified resin.
4. a kind of weather-proof semi-permeable type clear-water concrete protective agent of breathing freely according to claim 1,2 or 3, feature exist
In: the mass ratio of aqueous epoxy resins and water-insoluble epoxy resin is 1:0.3-0.5 in the modified epoxy.
5. a kind of weather-proof semi-permeable type clear-water concrete protective agent of breathing freely according to claim 1,2 or 3, feature exist
In: the mass ratio of aqueous polyurethane and hydrophobic polyurethane is 1:3-6 in the modified polyurethane.
6. a kind of preparation method of weather-proof semi-permeable type clear-water concrete protective agent of breathing freely described in claim 1, feature
It is, comprising the following steps:
(1) micron-sized modified resin is added in emulsifier TOA aqueous solution, sonic oscillation, heating stirring forms resin dispersion
Liquid；
(2) resin dispersion liquid by step (1) preparation is added in dispersing agent, alkali and deionized water, is sufficiently stirred, is eventually adding light
Catalyst and thickener, high-speed stirred, standing obtain weather-proof semi-permeable type clear-water concrete protective agent of breathing freely.
7. a kind of preparation method of weather-proof semi-permeable type clear-water concrete protective agent of breathing freely according to claim 6,
Be characterized in that: in the step (1), the partial size of micron-sized modified resin is 100-600 μm.
8. a kind of preparation method of weather-proof semi-permeable type clear-water concrete protective agent of breathing freely according to claim 6,
Be characterized in that: in the step (1), the solid-liquid ratio of micron-sized modified resin and emulsifier TOA aqueous solution is 1g:10-15ml.
9. a kind of preparation method of weather-proof semi-permeable type clear-water concrete protective agent of breathing freely according to claim 6,
Be characterized in that: in the step (1), the frequency of sonic oscillation is 25-40KHz, and the temperature of time 30-45min, heating are
60-80℃。
10. a kind of preparation method of weather-proof semi-permeable type clear-water concrete protective agent of breathing freely according to claim 6,
It is characterized in that: in the step (2), the application method for weather-proof semi-permeable type clear-water concrete protective agent of breathing freely are as follows: to clear water
After the completion of concreting, weather-proof semi-permeable type clear-water concrete protective agent of breathing freely is sprayed onto the surface of concrete, until mixed
Solidifying soil surface is all soaked, and is stood, until weather-proof semi-permeable type clear-water concrete protective agent of breathing freely is absorbed by concrete completely,
It can spray 2-3 times repeatedly.
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| CN110156493B (en) * | 2019-05-28 | 2021-12-17 | 梁剑 | Fair-faced concrete surface protective agent and preparation method thereof |
| CN110484134A (en) * | 2019-08-12 | 2019-11-22 | 江苏博拓新型建筑材料有限公司 | A kind of waterproof ventilating type clear-water concrete protective agent and preparation method thereof |
| CN111018562A (en) * | 2019-12-12 | 2020-04-17 | 中路园林有限公司 | Bare concrete protective agent |
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