CN108585675B - Pattern concrete and preparation method thereof - Google Patents
Pattern concrete and preparation method thereof Download PDFInfo
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- CN108585675B CN108585675B CN201810439921.6A CN201810439921A CN108585675B CN 108585675 B CN108585675 B CN 108585675B CN 201810439921 A CN201810439921 A CN 201810439921A CN 108585675 B CN108585675 B CN 108585675B
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
- C04B41/4505—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application
- C04B41/4511—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application using temporarily supports, e.g. decalcomania transfers or mould surfaces
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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
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of building materials, and particularly relates to pattern concrete and a preparation method thereof.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to pattern concrete and a preparation method thereof.
Background
Concrete is used as a building material with the largest application amount, because the plasticity of the concrete is strong, the decoration of the concrete attracts more and more attention, cement products and concrete structures generally exist or are applied to various engineering fields, but most of the products or concrete structures consider the functionality of the products and ignore the surface decoration directness of the products or concrete structures, the application of the direct decoration of various building facades is not many at present, wall picture decoration technologies mainly comprise delayed coagulation, printing, jigsaw puzzle or artistic carving, and the technologies have insignificant imaging effect on complex patterns and higher cost. The patterns on the market clothes and small industrial products are mostly formed by thermal transfer printing, the patterns are vivid and clear, but the method is not suitable for concrete members due to the size of transfer printing equipment.
Disclosure of Invention
The present invention aims to solve the above-mentioned problems of the prior art and provide a patterned concrete and a method for preparing the same, which utilizes the nano-crystal effect of the nano-admixture and the composite admixture to effectively control the color, state and hardening time of the concrete, successfully display the displayed pattern on the surface of the concrete in black and white tones, and utilize the grey and dark color tone to display the original image in a three-dimensional manner.
The technical scheme adopted by the invention for solving the problems is as follows:
the mix proportion of each cubic concrete is 165kg of water 158-; the nano mineral admixture is ultrafine mineral powder with the average particle size of 500-800 nm; the composite additive is prepared by compounding an early-strength polycarboxylate superplasticizer, a styrene-acrylic emulsion, a bubble optimization auxiliary agent and a workability regulator; concrete design strength grade C30.
According to the scheme, the mineral powder is nano-sized, has a crystal nucleus effect and can promote the formation of crystals in cement hydration products.
According to the scheme, the composite admixture comprises the following substances in percentage by mass: 8-12% of an early-strength polycarboxylate superplasticizer, 0.1-5% of a styrene-acrylic emulsion, 0.1-2% of a workability regulator, 0.05-3% of a bubble optimization aid and 78-91% of water, wherein the sum of the mass percentages of the materials is 100%.
According to the scheme, the workability regulator is a high molecular weight amphoteric polymer, and the structural formula of the workability regulator is shown as (I), wherein in the formula I, a and e are integers from 2 to 6, b and d are integers from 1 to 3, and c is 1.
According to the scheme, the bubble optimization aid is self-emulsifying polyether modified silicon and has a structural formula shown as a formula II, wherein in the formula II, a is an integer of 8, b is an integer of 2, c is an integer of 6, and R is1is-H, R2is-OH.
The invention also provides a preparation method of the pattern concrete, which comprises the following process steps:
a) image processing: processing the required decorative pattern into a gray-scale image through professional image processing software, adjusting pixels and gray scales according to the size to be displayed, horizontally turning the image by 180 degrees to obtain a processed image;
b) and (3) image output: outputting the processed image to synthetic paper by using a data output technology;
c) fixing the template: fixing the synthetic paper containing the output image obtained in the step b in a template, wherein one side with the output image is deviated from the template;
d) pouring concrete: c, uniformly and slowly pouring concrete into the template obtained in the step c, wherein the concrete is in contact with the output image;
e) removing the mold and maintaining: d, removing the template after the concrete poured in the step d is finally set, tearing off the template along one side after the surface of the synthetic paper is dried completely, uniformly attaching the required decorative patterns to the surface of the concrete, spraying a protective agent, and curing to obtain the pattern concrete.
According to the scheme, the data output technology in the step b is ink jet printing and the like.
According to the scheme, the synthetic paper is waterproof synthetic paper and is mainly synthesized paper formed by mixing and pressing polypropylene resin, polyethylene resin, modified resin, natural stone powder and other main raw materials.
According to the scheme, the final setting time in the step e is 4-8 hours, and the time for tearing off the synthetic paper is 15-20 hours after pouring.
According to the scheme, the protective agent in the step e is silicon or modified silicon transparent protective coating.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention provides a novel pattern concrete preparation method, which can promote the formation of hydrated crystals such as ettringite and the like in concrete by utilizing the nanometer crystal seed effect of a nanometer admixture and effectively control the setting time of the concrete; meanwhile, the nano admixture is ultrafine mineral powder, so that the filling effect is good, the working performance of the concrete is stable, segregation and bleeding are avoided, and the color of the concrete is uniform and has no color difference;
(2) the early strength of the concrete is further improved by effectively adding the composite additive, the setting time is favorably controlled, the workability regulator is an amphoteric high-molecular polymer, the reverse polyelectrolyte effect is obvious, the tackifying effect is not influenced by the concentration of salt ions in concrete slurry, and an internal crosslinking agent is introduced into the molecular structure of the concrete so that a three-dimensional network structure is formed between the additive and cement particles, the stability of the concrete is improved, and the transfer printing film is effectively prevented from being flawless and transferred to the surface of the concrete.
(3) The method for preparing the pattern concrete can be applied to a plane structure, and is particularly suitable for curved surfaces or special-shaped structures and the like.
Drawings
FIG. 1 is an image of a synthetic paper secured to a template;
FIG. 2 is a concrete product with the pattern removed from the synthetic paper.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
In the following examples, the styrene-acrylic emulsion was a milky white liquid with blue light. The solid content is 40-50%, the viscosity is 80-2000 mPa.s, the monomer residual quantity is 0.5%, and the PH value is 8-9; the workability regulator solid content is 1%; the bubble optimization auxiliary agent is self-emulsifying polyether modified silicon, and the solid content is 100%; the silicon transparent protective agent is a Zhengxiang Z4 type protective agent.
In the following examples, the continuous graded stone was specifically graded in the range of 5-16 mm.
In the following examples, the structural formula of the workability regulator is shown as (I), wherein a and e are integers of 2-6, b and d are integers of 1-3, and c is 1; the synthetic route can be as follows: adding deionized water, cationic monomer (acryloyloxyethyltrimethyl chloride), anionic monomer (acrylic acid, maleic anhydride, AMPS) and N, N' -methylenebisacrylamide into a four-mouth bottle provided with a dropping device, a stirrer, a condenser pipe, a thermometer and a nitrogen introducing device, and stirring at 65 ℃ until the monomers are completely dissolved; introducing nitrogen into the flask to replace the air in the flask, then adding ammonium persulfate into the flask, continuously stirring and keeping the internal temperature of the flask at 65 ℃ to start polymerization, and reacting at constant temperature for 4 hours to obtain the workability regulator shown in (I).
In the following examples, the bubble optimization aid is self-emulsifying polyether modified silicon, and the structural formula of the bubble optimization aid is shown as formula II, wherein in the formula II, a is 8, b is 2, c is 6, and R is1is-H, R2is-OH.
Example 1
The single concrete mixing proportion of the pattern concrete is 160kg of water, 300kg of P.O 42.5.5 cement, 45kg of nano mineral admixture, 810kg of sand, 1080kg of continuous graded stone and 10kg of composite admixture; wherein the nano mineral admixture is superfine mineral powder with the average particle size of 600 nm; the composite additive is prepared by compounding 8% of an early-strength polycarboxylate water reducing agent, 2% of styrene-acrylic emulsion, 1% of a workability regulator, 2% of a bubble optimization aid and 87% of water.
The preparation method of the pattern concrete comprises the following specific process steps:
a. image processing: processing the pattern to be decorated into a gray scale image through professional image processing software, adjusting pixels to 100 pixels/inch, and turning the image by 180 degrees to obtain a processed image;
b. and (3) image output: printing the processed image on PP synthetic paper with the width of 1.5m by using an ink-jet printing and portrait-writing machine;
c. fixing the template: fixing the synthetic paper containing the output image on a template (as shown in figure 1), wherein one side of the pattern is deviated from the template;
d. pouring concrete: concrete mixed by the concrete composition of the embodiment is uniformly and slowly poured into the template;
e. removing the mold and maintaining: and (3) removing the template after 4 hours, slowly tearing off the gum synthetic paper along one side after removing the template for 12 hours, uniformly forming the pattern to be displayed on the surface of the concrete (as shown in figure 2), spraying a silicon transparent protective agent, and curing.
Example 2
The single concrete mixing proportion of the pattern concrete is 165kg of water, 300kg of P.O 42.5.5 cement, 55kg of nano mineral admixture, 860kg of sand, 1000kg of continuous graded stone and 8kg of composite admixture; the nano mineral admixture is superfine mineral powder, and the average particle size is 500 nm; the composite additive is prepared by compounding 12% of an early strength type polycarboxylate water reducing agent, 3% of styrene-acrylic emulsion, 2% of a workability regulator, 3% of a bubble optimization auxiliary agent and 80% of water.
The preparation method of the pattern concrete comprises the following specific process steps:
a. image processing: processing the pattern to be decorated into a gray scale image through professional image processing software, adjusting pixels to 120 pixels/inch, and turning the image for 180 degrees;
b. and (3) image output: printing the overturned image on PP synthetic paper with the width of 2.0m by using an ink-jet printing and portrait-writing machine;
c. fixing the template: fixing the synthetic paper containing the output image on a template, wherein one side with the pattern deviates from the template;
d. pouring concrete: concrete mixed by the concrete composition of the embodiment is uniformly and slowly poured into the template;
e. removing the mold and maintaining: and (3) removing the template after 5 hours, slowly removing the gum synthetic paper along one side after removing the template for 14 hours, uniformly attaching the pattern to be displayed on the surface of the concrete, spraying a silicon transparent protective agent, and then maintaining.
The pattern concrete can be suitable for any picture, can highly present the appearance of an original pattern, is not limited by planes, can be produced in large-scale industrialized batch, and is economical and efficient.
As shown in FIG. 2, the pattern concrete of the invention is similar to thermal transfer imaging, can directly coat a film on the surface of the concrete with the pattern, has the height of the appearance of the original pattern, is not limited by a plane, can be produced in large-scale industrialized batch, and is economical and efficient.
The results of the performance tests of the concrete obtained in examples 1-2 are shown in Table 1, and the results show that the concrete admixture prepared by the method of the present invention has good dispersibility, bubble control property, and good workability when applied to pattern concrete.
TABLE 1 test results of concrete Properties with patterns
It is apparent that the above embodiments are only examples for clearly illustrating and do not limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are therefore intended to be included within the scope of the invention as claimed.
Claims (2)
1. The preparation method of the pattern concrete is characterized by comprising the following process steps:
a) and (3) image output: outputting the image onto the waterproof synthetic paper using inkjet printing;
b) fixing the template: b, fixing the waterproof synthetic paper containing the output image obtained in the step a in a template, wherein one side with the output image is deviated from the template;
c) pouring concrete: b, uniformly and slowly pouring pattern concrete into the template obtained in the step b, wherein the concrete is in contact with the output image;
d) removing the mold and maintaining: c, removing the template after the concrete poured in the step c is finally set, tearing off the template along one side after the surface of the synthetic paper is dried completely, uniformly attaching the decorative patterns to the surface of the concrete, spraying a protective agent, and curing to obtain pattern concrete; wherein the final setting time is 4-8 hours, and the time for tearing off the synthetic paper is 15-20 hours after pouring;
the pattern concrete comprises 165kg of water 158-cement, 300kg of P.O 42.5.5 cement, 45-55kg of nano mineral admixture, 810kg of sand 800-cement, 1100kg of continuous graded stone 1000-cement and 8-10kg of composite admixture in each cubic mixing ratio; the nano mineral admixture is ultrafine mineral powder with the average particle size of 500-800 nm; the composite additive is prepared by compounding an early-strength polycarboxylate superplasticizer, a styrene-acrylic emulsion, a bubble optimization auxiliary agent and a workability regulator;
the composite additive comprises the following substances in percentage by mass: 8-12% of an early-strength polycarboxylate superplasticizer, 0.1-5% of a styrene-acrylic emulsion, 0.1-2% of a workability regulator, 0.05-3% of a bubble optimization aid and 78-91% of water, wherein the sum of the mass percentages of the materials is 100%;
wherein the styrene-acrylic emulsion has a solid content of 40-50% and a viscosity of 80-2000 mPa & s;
the structural formula of the workability regulator is shown as (I), wherein in the formula (I), a and e are integers of 2-6, b and d are integers of 1-3, and c is 1;
the bubble optimization aid is self-emulsifying polyether modified silicon and has a structural formula shown as a formula (II), wherein in the formula (II), a is an integer of 8, b is an integer of 2, c is an integer of 6, and R1is-H, R2is-OH.
2. The method for preparing pattern concrete according to claim 1, wherein the output image in step a) is a processed image, that is, the pixel and gray scale of the desired image are adjusted according to the size to be displayed, and the processed image is obtained after horizontally turning 180 degrees, so as to ensure that the decorative pattern obtained in step d is the desired image.
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| CN102690089B (en) * | 2012-06-13 | 2014-02-12 | 江苏建筑职业技术学院 | Self-compacting fair-faced concrete with strength class C50 |
| CN103936913B (en) * | 2014-03-14 | 2016-05-18 | 中交四航工程研究院有限公司 | For thickener, its preparation method of self-compacting concrete and apply the self-compacting concrete of this thickener |
| CN104479066B (en) * | 2014-12-01 | 2017-12-05 | 中建商品混凝土有限公司 | A kind of concrete viscosity conditioning agent and preparation method thereof |
| CN105218020B (en) * | 2015-09-17 | 2017-09-19 | 南京倍立达新材料系统工程股份有限公司 | A kind of sprayable lower shrinkage GRC decoration mortars and preparation method thereof |
| CN105293990B (en) * | 2015-12-14 | 2017-10-24 | 中建商品混凝土有限公司 | A kind of self-emulsifying concrete defoamer and preparation method thereof |
| CN107253266B (en) * | 2017-07-05 | 2019-05-10 | 深圳市威锴众润建材科技有限公司 | A kind of method of concrete surface pattern-making |
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