CN104891876A - As-cast concrete and preparation method thereof - Google Patents
As-cast concrete and preparation method thereof Download PDFInfo
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Abstract
The invention provides an as-cast concrete and a preparation method thereof. The as-cast concrete paint is in the form of an organic-inorganic combination product and the calcium hydroxide is added into the paint. Due to the adoption of calcium hydroxide, the paint is endowed with the mottled, dignified and natural effect that none of texture paints possesses, while calcium hydroxide serves as one part of a resin emulsion polymerization network. In this way, the strength of the polymer reticular structure is improved. Therefore, the as-cast concrete paint has the advantages of both normal concretes and texture paints. That is, not only the as-cast concrete paint has the uniquely natural, dignified and unadorned appearance of the as-cast concrete, but also the as-cast concrete paint has the characteristics of paints at the same time, such as easy colour modulation and easy construction.
Description
Technical field
The present invention relates to a kind of imitative clear-water concrete and preparation method thereof, especially a kind of organic and inorganic compound imitates clear-water concrete and preparation method thereof.
Background technology
Clear-water concrete is also known as decorative concrete; Gain the name because it has decorative effect.It is shaping that it belongs to one-time-concreting, do not do any external decoration, and the natural surface effect directly adopting onsite concrete is facing, therefore normal concrete is different from, surfacing is smooth, uniform color, corner angle clearly demarcated, without clashing and breaking and pollution, seem very natural, solemnly.
Clear-water concrete results from the twenties in 20th century, along with concrete is widely used in building field, structure art is transferred to sight the texture of material itself from concrete as a kind of structured material gradually, start to express the emotion of building and passing out by the inherent ornamental feature of concrete, be at this time called international look.To the eighties in 20th century, the architect of a collection of new has continued international look, emphasize hi-tech, emphasize the scientific and technical content of building structure, define " High-Tech ", after World War II, all neglected tasks are being undertaken, part concrete construction economized plaster, the operation of decorating and directly using, deduce to today, the clear-water concrete technology of Japan has obtained very large development.
In China, clear-water concrete is along with concrete development development.20 century 70s, water in the construction of plug-in system at Inner, clear-water concrete is mainly used in that precast concrete external wall panel is counter to be beaten in construction, achieves progress.Afterwards, because the sight of external decoration is all thrown in face brick and glass curtain wall by people, application and the practice of clear-water concrete almost stay cool.Until 1997, engineering that Beijing set up " structure Great Wall Cup " is encouraged, and promotes dry concrete construction, makes clear-water concrete recapture development.In the last few years, a small amount of top-grade building engineering was as Sanya, Hainan airport, and the Capital Airport, the large-scale oblique cylindrical shell etc. of Pudong International Airport in Shanghai terminal, Oriental Pearl all have employed clear-water concrete.Along with the objective requirement of green building, improving constantly of the environmental consciousness of people, the natural thought of recovering one's original simplicity is rooted in the hearts of the people, China's clear-water concrete engineering developed into new stage.
Imitative clear-water concrete also claims Clear Concrete Paint, have employed and traditional disposal pouring different process, imitative Clear Concrete Paint construction is similar with general exterior coating, so just change the without polishing method of traditional clear water concrete once-cast, it can be constructed at any basal plane, comprise on cement concrete, brick, stone material, plasterboard, pressure plate, warming plate, plank body of wall, all can produce again " clear-water concrete ".Overcome the obstacle of traditional clear water concrete in cast, work post cooperation, template, maintenance etc.The senior artistic effect of the natural and unaffected the same with clear-water concrete can be createed, duration efficiency can be improved and save cost.
Clear-water concrete, has noble simple artistic effect; Pure Shimizu concrete building construction is the dream of many architects.But traditional cast clear-water concrete is difficult to perfection, the uncertainty of all too many levels of constructing at the scene etc. just because of clear-water concrete, and domestic construction construction level at present is generally on the low side, real successfully Shimizu concrete building construction cans be counted on one's fingers.Clear-water concrete and common concrete project; directly be exposed in air owing to cancelling coat of plaster and finish coat, concrete carbonization must be accelerated, and makes concrete lose provide protection to reinforcing bar too early; make removing blunt of reinforcing steel bar, corrosion and protective layer cracking etc., and jeopardize building structure.
In addition, the body of wall of a lot of building or be not suitable for because cast bare concrete wall technology is too complicated, and the problem such as cannot to hold to the effect after the clear-water concrete form removal of last cast, coating circle is proposed and adopts waterproof paint construction in layer, puppet makes the texture appearance effect of clear-water concrete, but the in order to be effective time is not long, just there will be afterwards come off, demoulding, humidity, the phenomenon such as liver moss.Industry is called " pseudo-clear water ".
" pseudo-clear water " concrete essence is at a kind of cold coating of concrete surface brushing.Thus come with the method for " coating " reparation " cement ", cause the instability of color, the phenomenons such as adhesive power is inadequate.Its performance and decorative effect and real clear-water concrete far apart.Do not reach the decorative effect of clear-water concrete simpleness.The marrow of this " pseudo-clear water " and clear-water concrete: " there is simple and unadorned, naturally sedate outward appearance charm, inherent thick and heavy and elegantly to disagree, do not reach Designers and the real demand of owner.
Summary of the invention
In order to solve following technical problem:
(1), solve tradition and build the problem that Construction Technology of Fair Faced Concrete is too complicated, special body of wall cannot be constructed, effect is difficult to guarantee.
(2), solve and adopt waterproof paint construction in layer to copy the phenomenon such as the coming off of appearance, demoulding, humidity, liver moss.
(3), solve some imitative clear-water concrete colors instability on market, adhesive power is inadequate, the ornamental problem too far away with building clear-water concrete difference.
The present invention proposes a kind of scheme:
A kind of imitative Clear Concrete Paint, comprises component A, B component and mill base, wherein:
Component A is pulvis, comprises following composition according to weight percent: inorganic cementitious material 0.2%-15%, filler 70%-93%, ether of cellulose 0.2%-3%, attapulgite 0-4%, wood fibre 0-2%, dry powder defoamer 0.15%-0.5%;
B component is liquor, comprises following composition according to weight percent: water 30%-80%, crosslinked emulsions 15%-50%, film coalescence aid 1%-15%, antifreezing agent 1%-6%, sterilant 0.2%-1%, silicate stabilizers 0.1%-0.8%, mould inhibitor 0.1%-2%;
Wherein the weight percent of component A is: 60-72%; The weight percentage ranges of B component is: 28-45%; The mass percent scope of mill base is: 0.1-0.4%.
Further, described inorganic cementitious material is technical grade 400 object calcium hydroxide, purity >=90%.
Further, filler is 200-325 order coarse whiting, 20-40 order river sand, 10-20 order river sand.
Further, described ether of cellulose is HPMC-40US.
Further, described crosslinked emulsions is BASF SD-623ap emulsion.
Further, described film coalescence aid is Yi Shiman Lauryl Alcohol ester.
Further, described antifreezing agent is LG-DOW propylene glycol; Described sterilant is ROHM AND HAAS LXE sterilant; Described silicate stabilizers is the east Chinese difficult to understand
sT silicate stabilizers; Described mould inhibitor is for should hold high enlightening EPW efficient exterior wall dry film mould inhibitor.
The present invention also proposes a kind of manufacture method of imitative Clear Concrete Paint, comprises the steps:
Each for component A starting material are weighed according to weight proportion, is placed in dry-mixed machine and stirs stand-by;
Each for B component starting material are weighed according to weight proportion, join in dispersion machine stir stand-by;
Component A is joined in dispersion machine, stir together with B component;
Add mill base to carry out toning and check colors.
Further, wherein B component adds starting material in dispersion machine according to following order: water, crosslinked emulsions, film coalescence aid, antifreezing agent, sterilant, silicate stabilizers.
Further, wherein A, B component churning time separately about 10 minutes.
Imitative Clear Concrete Paint prepared by the present invention and preparation technology thereof have following characteristics:
1. this imitative Clear Concrete Paint is the product of a organic and inorganic combination, this product, in conjunction with the advantage of normal concrete and texture coating, namely has exclusive natural, thick and heavy, the simple outward appearance of clear-water concrete and has coating simultaneously and easily to mix colours the feature of construction.
In coating, add calcium hydroxide, calcium hydroxide not only gives texture coating unexistent mottled, thick and heavy, natural effect, and calcium hydroxide becomes a part in resin emulsion converging network simultaneously, increases derivatized polymers intensity.Therefore the addition of resin aqueous emulsion greatly reduces under equal performance, and such product is environment protection and saving oil natural resource advantageously.
2., based on imitative clear-water concrete technology and construction singularity, do not add dispersion agent, wetting agent in the production process of this product, in high alkalinity situation, reduce sterilant usage quantity.Such coating has lower VOC, reduces the interpolation of aqueous solvent, makes coating in use avoid more secondary pollution.
3. imitative clear-water concrete of the present invention is the texture coating of a thick-slurry type, adds calcium hydroxide in used time coating, and calcium hydroxide water regain is large, easily causes cracking situation to occur.Therefore in formula, add wood fibre, namely wood fibre ensures that inside and outside coating, rate of drying is even, ensures that the later stage criticizes pressure, polishing construction technology is carried out; Simultaneously in coating drying process, reduce tension force and obviously play the effect of cracking resistance.
4. in imitative Clear Concrete Paint because add calcium hydroxide, calcium hydroxide has high alkalescence and a large amount of Free Ca
2+this is different from common texture coating, environment causes emulsion to be selected to the key of imitative clear-water concrete existence and stability, utilizes emulsion and silicate stabilizers to coordinate, make imitative clear-water concrete of the present invention have superior stability in storage and working viscosity in the present invention.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the present invention's wherein embodiment.
Embodiment
Be described in further detail technical scheme of the present invention below by specific embodiment, the embodiment of showing is only exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
See table 1, comprise the formula composition of embodiment 1-embodiment 5:
Table 1
In table 1, the mass percent scope of component A is: 60-72%; The mass percent scope 28-45% of B component; The mass percent scope of mill base is: 0.1-0.4%; The mass percent sum of component A, B component, mill base is 100%.
Wherein: component A: inorganic cementitious material is such as: technical grade 400 object calcium hydroxide, purity >=90%; Filler is white coarse whiting stone flour and the river sand of 325 order-20 order gratings.Ether of cellulose is HPMC-40US (average viscosity 40000cps, 2% solution/20 DEG C).
B component: crosslinked emulsions is BASF SD-623ap emulsion; Film coalescence aid is Yi Shiman Lauryl Alcohol ester; LG-DOW propylene glycol; Sterilant is ROHM AND HAAS LXE sterilant; Silicate stabilizers is the east Chinese difficult to understand
sT silicate stabilizers; Mould inhibitor is for should hold high enlightening EPW efficient exterior wall dry film mould inhibitor.
According to the standard-required of the husky textured coating of exterior wall, imitative clear-water concrete obtained to embodiment 1 to 5 respectively detects.Result is as shown in table 2:
Table 2
For advantage and the deficiency of at present " clear-water concrete casting " and " pseudo-clear water ", through the long-term research of applicant and deep research and development, create a kind of organic and inorganic compound and imitate clear-water concrete.Traditional clear-water concrete is difficult quality guarantee because cast bare concrete wall technology is too complicated, and " pseudo-clear water " concrete essence is the noble decorative effect not reaching clear-water concrete simpleness at a kind of cold coating of concrete surface brushing.It is both advantages are combined and avoids above-mentioned existing problems that the organic and inorganic compound of applicant's research and development imitates clear-water concrete.Traditional clear water concrete has the senior artistic effect of natural and unaffected, and " pseudo-clear water " concrete construction is good, and brushing is convenient, and cost-effectivenes is good; It is not very high for requiring relatively to body of wall.The application studies the decorative effect causing clear-water concrete to have simple noble quality from clear-water concrete, and to affect critical material be calcium hydroxide, and " pseudo-clear water " concrete construction is good, brushing is convenient, cost-effectivenes is well mainly based on water-based texture coating, in exterior wall, construction application performance is good, require relatively low to body of wall, and be carry out brushing construction the later stage.
Showing that clear-water concrete has simple noble decorative effect through our company research staff research is be a kind of inorganic mortar series products based on clear-water concrete, it forms the many micropores in rear surface and the exclusive mottled texture of dry-mix, which produces above-mentioned decorative effect; It is because water-base resin coating forms a continuous print latex film after film forming that organic water borne cold coating cannot have simple and unadorned, naturally sedate outward appearance charm decorative effect in imitative clear-water concrete, this film causes coating surface to produce a small amount of gloss, and water-base resin coating surface color even is consistent, and such two kinds of situations combine and just cannot reach the many micropores of faced concrete surface and dumb light natural surface.
For both above-mentioned middle key points, the organic and inorganic compound of the application's exploitation imitates the paste texture coating that clear-water concrete is a water-based, inorganic calcium hydroxide is added in texture coating, calcium hydroxide in conjunction with organic resin aqueous emulsion, and can't form a continuous print emulsion film when both combine.Batch scraping, flatten, present after polishing, with traditional clear water concrete, there is simple noble decorative effect.
Wherein, to imitate the clear-water concrete mechanism of action as follows for organic and inorganic compound:
Calcium hydroxide is added to the water part by water dissolution, and is dissociated into Ca further
2+and OH
-.Coating application also, after drying and forming-film, has part Ca
2+be in the structure reticulated structure of film forming energy (polymkeric substance), Ca
2+with CO in air
2reaction, generate CaCO
3.The reaction of calcium hydroxide is in the netted situ repercussion of polymer architecture, becomes a part for polymer network structure, strengthens derivatized polymers intensity and promotes bonding sticking power to pigment, filler simultaneously.
Imitative clear-water concrete and " pseudo-clear water " concrete or organic water borne cold coating have the difference of matter, and the imitative clear-water concrete of our company's research and development just has following innovative point:
1. calcium hydroxide
The decorative effect that will reach clear-water concrete in the paste texture coating of water-based is found through research, in paste coating, resin aqueous emulsion can not form continuous print paint film, and needs to produce mottled, the thick and heavy natural perception of a kind of dry powder containing inorganic substance in construction batch pressure, polishing.Based on above-mentioned requirements, the application adds the activated inorganic mineral of this tool of calcium hydroxide, calcium hydroxide can become a part for polymer network structure after adding, give derivatized polymers intensity when resin aqueous emulsion addition reduces, increase the bonding sticking power to pigment, filler simultaneously.
2. high alkali resistance crosslinked emulsions
Calcium hydroxide is added to the water part by water dissolution, and is dissociated into Ca further
2+and OH
-.The membership that adds of calcium hydroxide causes the pH value of water-borne coatings rise and produce Free Ca
2+, when common resin aqueous emulsion is stablized, pH value scope is between 6-8, and the coating PH adding calcium hydroxide arrives 11-13, and containing a large amount of Ca
2+ion, therefore common resin aqueous emulsion can not stable existence in containing the aqueous solution of calcium hydroxide, high alkalinity, high Ca
2+destroy that emulsion is outside ionosphericly stablely causes emulsion to lose stable and breakdown of emulsion thus coating cannot use.In order to avoid above-mentioned situation occurs, the application needs to pick out from resin aqueous emulsion to have high alkali resistance and Ca
2+while good can with the emulsion of calcium hydroxide crosslinking curing.
3. silicate stabilizers
In order to change coating application thixotropy and mode of appearance thus add some materials containing silicate in the imitative Clear Concrete Paint of the application's exploitation, such as: attapulgite, calcium hydroxide.A kind of silicate stabilizers of special interpolation is needed in order to coating keeps stable in long-term storage medium viscosity, silicate stabilizers main component is quaternary ammonium compound, and its main application is: 1. during raising storage, 2. viscosity stability reduces thickening behavior and 3. improve application property.
4. wood fibre
Imitative Clear Concrete Paint is because add calcium hydroxide, and shrinking process of setting time calcium hydroxide is dry can produce string stress, and imitative clear-water concrete is a kind of thick-slurry type product simultaneously, batch scrapes thickness to reach 4mm; Two kinds of situations act on lower easy generation cracking and crackle mutually.In order to avoid above-mentioned situation, in imitative clear-water concrete, add wood fibre.Wood fibre main application is: 1. splitting resistance: the mechanical energy produced in solidification or drying process is weakened by fiber grain.2. contraction is reduced: the dimensional stability of wood fibre is very good, this means that compound can not shrink sedimentation, and improves its splitting resistance.3. anti-hanging down is improved: there will not be falling phenomenon in construction operation and drying process, this makes thicker plastering once to complete, even if under the high temperature conditions, wood fibre also has good thermostability.4. the open hour are extended: because the moisture of inside can be promptly transferred to pulp surface and interface by the capillary action of fibrous texture, the uniform moisture of slurry system inside is distributed, obviously can reduce skinning, and bonding strength and surface strength are significantly improved, this mechanism also obviously plays the effect of cracking resistance due to the minimizing of tension force in drying process.
Be described for imitative clear-water concrete manufacturing process involved in the present embodiment below:
See Fig. 1, comprise the following steps:
(1) each for component A starting material are weighed according to weight proportion, comprising: 200-325 order coarse whiting, 20-40 order river sand, 10-20 order river sand., PMC40us Mierocrystalline cellulose, attapulgite, PMC-500 wood fibre, to join in dry-mixed machine stir about 10 minutes, stand-by;
(2) each for B component starting material to be weighed according to weight proportion, and according to following order: tap water, BASF SD-623ap, Lauryl Alcohol ester, propylene glycol, LXE sterilant, silicate stabilizers, to join in dispersion machine stir about 10 minutes, stand-by;
(3) component A is joined in dispersion machine, regulate the rotating speed of dispersion machine to be about 500 revs/min and stir;
(4) add mill base to carry out toning and check colors.
Imitative Clear Concrete Paint prepared by the present invention and preparation technology thereof have following characteristics:
1. this imitative Clear Concrete Paint is the product of a organic and inorganic combination, this product, in conjunction with the advantage of normal concrete and texture coating, namely has exclusive natural, thick and heavy, the simple outward appearance of clear-water concrete and has coating simultaneously and easily to mix colours the feature of construction.
In coating, add calcium hydroxide, calcium hydroxide not only gives texture coating unexistent mottled, thick and heavy, natural effect, and calcium hydroxide becomes a part in resin emulsion converging network simultaneously, increases derivatized polymers intensity.Therefore the addition of resin aqueous emulsion greatly reduces under equal performance, and such product is environment protection and saving oil natural resource advantageously.
2., based on imitative clear-water concrete technology and construction singularity, do not add dispersion agent, wetting agent in the production process of this product, in high alkalinity situation, reduce sterilant usage quantity.Such coating has lower VOC, reduces the interpolation of aqueous solvent, makes coating in use avoid more secondary pollution.
3. imitative clear-water concrete of the present invention is the texture coating of a thick-slurry type, adds calcium hydroxide in used time coating, and calcium hydroxide water regain is large, easily causes cracking situation to occur.Therefore in formula, add wood fibre, namely wood fibre ensures that inside and outside coating, rate of drying is even, ensures that the later stage criticizes pressure, polishing construction technology is carried out; Simultaneously in coating drying process, reduce tension force and obviously play the effect of cracking resistance.
4. in imitative Clear Concrete Paint because add calcium hydroxide, calcium hydroxide has high alkalescence and a large amount of free Ca2+, this is different from common texture coating, environment causes emulsion to be selected to the key of imitative clear-water concrete existence and stability, utilize emulsion and silicate stabilizers to coordinate in the present invention, make imitative clear-water concrete of the present invention have superior stability in storage and working viscosity.
It should be noted that, above-described embodiment belongs to preferred embodiment, not for the restriction to the application.Above to present application has been detailed introduction, applying specific case herein and setting forth the principle of the application and embodiment, the explanation of above embodiment is just for helping method and the core concept thereof of understanding the application; Meanwhile, for one of ordinary skill in the art, according to the thought of the application, all will change in specific embodiments and applications, in sum, this description should not be construed as the restriction to the application.
Claims (10)
1. an imitative Clear Concrete Paint, comprises component A, B component and mill base, wherein:
Component A is pulvis, comprises following composition according to weight percent: inorganic cementitious material 0.2%-15%, filler 70%-93%, ether of cellulose 0.2%-3%, attapulgite 0-4%, wood fibre 0-2%, dry powder defoamer 0.15%-0.5%;
B component is liquor, comprises following composition according to weight percent: water 30%-80%, crosslinked emulsions 15%-50%, film coalescence aid 1%-15%, antifreezing agent 1%-6%, sterilant 0.2%-1%, silicate stabilizers 0.1%-0.8%, mould inhibitor 0.1%-2%;
Wherein the weight percent of component A is: 60-72%; The weight percentage ranges of B component is: 28-45%; The mass percent scope of mill base is: 0.1-0.4%.
2. imitative Clear Concrete Paint according to claim 1, is characterized in that: described inorganic cementitious material is technical grade 400 object calcium hydroxide, purity >=90%.
3. imitative Clear Concrete Paint according to claim 1, is characterized in that: filler is 200-325 order coarse whiting, 20-40 order river sand, 10-20 order river sand.
4. imitative Clear Concrete Paint according to claim 1, is characterized in that: described ether of cellulose is HPMC-40US.
5. imitative Clear Concrete Paint according to claim 1, is characterized in that: described crosslinked emulsions is BASF SD-623ap emulsion.
6. imitative Clear Concrete Paint according to claim 1, is characterized in that: described film coalescence aid is Yi Shiman Lauryl Alcohol ester.
7. imitative Clear Concrete Paint according to claim 1, is characterized in that: described antifreezing agent is LG-DOW propylene glycol; Described sterilant is ROHM AND HAAS LXE sterilant; Described silicate stabilizers is the east Chinese difficult to understand
sT silicate stabilizers; Described mould inhibitor is for should hold high enlightening EPW efficient exterior wall dry film mould inhibitor.
8. a manufacture method for imitative Clear Concrete Paint described in any one of claim 1-7, comprises the steps:
(1) each for component A starting material are weighed according to weight proportion, be placed in dry-mixed machine and stir stand-by;
(2) each for B component starting material are weighed according to weight proportion, join in dispersion machine stir stand-by;
(3) component A is joined in dispersion machine, stir together with B component;
(4) add mill base to carry out toning and check colors.
9. the manufacture method of imitative Clear Concrete Paint according to claim 8, is characterized in that: wherein B component adds starting material in dispersion machine according to following order: water, crosslinked emulsions, film coalescence aid, antifreezing agent, sterilant, silicate stabilizers.
10. the manufacture method of imitative Clear Concrete Paint according to claim 8, is characterized in that: wherein A, B component churning time separately about 10 minutes.
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| CN109537893A (en) * | 2017-09-22 | 2019-03-29 | 上海宝冶集团有限公司 | Pouring construction method without facing layer concrete |
| CN111039593A (en) * | 2019-12-26 | 2020-04-21 | 上海贝塔建筑科技有限公司 | As-cast finish concrete imitation coating and preparation method thereof |
| CN111978019A (en) * | 2020-08-12 | 2020-11-24 | 宁波新力建材科技有限公司 | Antibacterial fair-faced concrete and preparation process thereof |
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| Publication number | Publication date |
|---|---|
| CN104891876B (en) | 2017-09-22 |
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