CN109372224B - Exposed sand concrete and preparation method thereof - Google Patents
Exposed sand concrete and preparation method thereof Download PDFInfo
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- CN109372224B CN109372224B CN201811319781.5A CN201811319781A CN109372224B CN 109372224 B CN109372224 B CN 109372224B CN 201811319781 A CN201811319781 A CN 201811319781A CN 109372224 B CN109372224 B CN 109372224B
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- concrete
- exposed
- sand
- layer
- surface hardening
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
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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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
-
- 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
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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
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/53—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone involving the removal of at least part of the materials of the treated article, e.g. etching, drying of hardened concrete
- C04B41/5338—Etching
- C04B41/5353—Wet etching, e.g. with etchants dissolved in organic solvents
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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
- C04B41/72—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone involving the removal of part of the materials of the treated articles, e.g. etching
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Abstract
The invention provides a sand exposed concrete and a preparation method thereof, wherein the sand exposed concrete adopts a sand exposed concrete surface hardening material and carries out erosion process treatment, the sand exposed concrete surface hardening material comprises a sand exposed surface layer, a sand exposed concrete surface hardening layer and a concrete base layer, and the preparation method comprises the following steps: a concrete base layer is cast in situ; when the cast-in-place concrete base layer is close to initial setting, spreading the surface hardening material of the exposed concrete, and after the surface hardening material of the exposed concrete fully absorbs water and is wetted, leveling and polishing; moisturizing and curing the concrete for 3 days to form a surface hardening layer of the exposed concrete; sprinkling an aggressive agent on the surface hardening layer of the exposed sand concrete, and then adopting a brush to carry out washing treatment to form an exposed sand surface layer; and continuing to moisturize and maintain the concrete for at least 7 days. The invention enables the gravel to be exposed to achieve the effect of a decorative surface, the exposed sand surface is uniform and flat, the problems that the surface flatness, the exposed depth are inconsistent, the exposed sand is not uniform and the like are difficult to control by the traditional delayed coagulation flushing process method are solved, and the invention has excellent mechanical property, anti-skid property, anti-cracking property and the like.
Description
Technical Field
The invention relates to the technical field of concrete manufacturing, in particular to a sand exposed concrete and a preparation method thereof.
Background
Decorative concrete is increasingly applied to building engineering and ground paving engineering, and exposed coarse aggregate concrete is common in China as a product with relatively mature technology; however, cement-based mortar/open fine aggregate concrete is rarely seen in China, gravel and organic polymer adhesive are combined to form a common anti-skid ground, and adhesive-coated sand particles are laid on the ground to form a 'mortar' ground. The common exposed aggregate treatment process is a delayed coagulation flushing method, namely, a certain amount of retarder is sprayed on the surface of concrete after the concrete is poured, and the surface aggregate is exposed by adopting water flushing after a certain time. Therefore, it is necessary to further modify the conventional techniques to produce more excellent open-air concrete.
Disclosure of Invention
The invention aims to provide the exposed concrete and the preparation method thereof, wherein the exposed concrete is treated by adopting the surface hardening material of the exposed concrete and an erosion process method, so that gravel is exposed to achieve the effect of a decorative surface, the exposed sand surface is uniform and flat, the problems of difficult control of surface flatness, inconsistent exposed depth, uneven exposed sand and the like in the traditional delayed coagulation washing process method are solved, and the exposed concrete has excellent mechanical property, anti-slip property, anti-cracking property and the like.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a sand exposed concrete is prepared from the surface hardening material of sand exposed concrete and the erosion treating process including sand exposed surface layer, surface hardening layer of sand exposed concrete and concrete base layer.
According to the scheme, the surface hardening material for the exposed concrete comprises the following components in parts by weight: 500 portions of cementing material 320 and active SiO210.5 to 44.0 parts of rubber powder, 1.75 to 8.25 parts of rubber powder, 0.385 to 1.815 part of synergist, 0 to 16.5 parts of toner, 1.05 to 4.40 parts of whiskering inhibitor and 650 parts of tough aggregate.
A preparation method of the exposed sand concrete comprises the following steps:
1) the concrete base layer is cast in situ, and is paved, vibrated and compacted until the concrete surface layer has a mortar layer with the thickness of at least 3mm, and is trowelled;
2) when the cast-in-place concrete base layer is close to initial setting, spreading the surface hardening material of the exposed concrete on the surface of the concrete base layer twice, and trowelling and polishing after the surface hardening material of the exposed concrete fully absorbs water and wets each time;
3) moisturizing and curing the concrete for 3 days to form a surface hardening layer of the exposed concrete;
4) sprinkling an aggressive agent on the exposed sand concrete surface hardening layer, and then adopting a brush to carry out brushing treatment until surface gravel is exposed to the specified requirement to form an exposed sand surface layer;
5) and continuing to moisturize and maintain the concrete for at least 7 days.
According to the scheme, the dosage of the surface hardening material for the exposed concrete is 4-6kg/m2The first dispensing amount is 2/3 and the second dispensing amount is 1/3.
According to the scheme, the erosion agent is formed by mixing hydrochloric acid, oxalic acid or a mixture of the hydrochloric acid and the oxalic acid with water according to the volume ratio of 1: 3-4.
According to the scheme, the brush is a plastic soft brush.
The invention has the beneficial effects that:
1) when the product is prepared, the erosion treatment process of the surface of the exposed concrete is carried out after the concrete is hardened for 3 days, and the delayed coagulation treatment is not required to be carried out on the surface of the concrete which is not coagulated and hardened, so that the surface smoothness is greatly ensured;
2) according to the invention, the exposed sand is treated by adopting an erosion process to achieve the effect of a decorative surface, the exposed sand surface is uniform and flat, the exposed sand quality is convenient to control, and the problems of inconsistent exposure depth, non-uniform exposed sand and the like caused by difficulty in controlling the spraying amount and uniformity of the retarder by a washing method of the traditional retarding process are solved.
3) The exposed sand surface layer of the invention adopts special exposed sand concrete surface hardening material and a matching construction method, so that the exposed sand concrete has excellent mechanical property, anti-slip property, anti-cracking property and the like.
Drawings
Fig. 1 is a schematic structural diagram of the product of the present invention.
In the figure: 1. exposing a sand surface layer; 2. a surface hardening layer of exposed concrete; 3. a concrete base layer.
Detailed Description
The technical solution of the present invention is described below with reference to the accompanying drawings and examples.
Example 1, see figure 1:
the invention provides a sand exposed concrete and a preparation method thereof, comprising the following steps:
1) casting a concrete base layer 3 with the strength grade of C20 in situ, paving and vibrating the concrete base layer to be dense until a mortar layer with the thickness of 3mm is formed on the concrete surface layer, and trowelling the mortar layer;
2) at a rate of 5kg/m2Weighing the exposed concrete surface hardening material according to the using amount, spreading the exposed concrete surface hardening material on the surface of the concrete base layer 3 twice when the cast-in-place concrete base layer 3 is close to initial setting, and trowelling and smoothing after the exposed concrete surface hardening material fully absorbs water and wets each time, wherein the first spreading amount of the surface hardening material is 2/3 of the total using amount, and the second spreading amount of the surface hardening material is 1/3 of the total using amount;
3) the concrete is moisturized and maintained for 3 days to form a exposed concrete surface hardening layer 2;
4) sprinkling an aggressive agent mixed by hydrochloric acid and water according to the volume ratio of 1:3 on the exposed sand concrete surface hardening layer 2, and then carrying out brushing treatment by adopting a plastic soft brush until surface gravel is exposed to the specified requirement to form an exposed sand surface layer 1;
5) after the erosion washing process is finished, the concrete is continuously moisturized and maintained for 7 days.
Further, the surface hardening material for the exposed concrete comprises the following components in parts by weight: 325 parts of cementing material and active SiO230 parts of rubber powder, 6 parts of synergist, 8 parts of toner, 3 parts of whiskering inhibitor and 450 parts of tough aggregate.
Example 2:
the invention provides a sand exposed concrete and a preparation method thereof, comprising the following steps:
1) casting a concrete base layer with the strength grade of C30 in situ, paving and vibrating the concrete base layer to be dense until the concrete surface layer has a mortar layer with the thickness of 5mm, and trowelling the mortar layer;
2) at a rate of 6kg/m2Weighing the exposed concrete surface hardening material according to the using amount, spreading the exposed concrete surface hardening material on the surface of the concrete base layer twice when the cast-in-place concrete base layer is close to initial setting, and trowelling and smoothing after the exposed concrete surface hardening material fully absorbs water and wets each time, wherein the first spreading amount of the surface hardening material is 2/3 of the total using amount, and the second spreading amount of the surface hardening material is 1/3 of the total using amount;
3) moisturizing and curing the concrete for 3 days to form a surface hardening layer of the exposed concrete;
4) sprinkling an aggressive agent mixed by oxalic acid and water according to the volume ratio of 1:4 on the exposed sand concrete surface hardening layer, and then adopting a plastic soft brush to carry out brushing treatment until surface gravel is exposed to the specified requirement to form an exposed sand surface layer;
5) after the erosion washing process is finished, the concrete is continuously moisturized and maintained for 8 days.
Further, the surface hardening material for the exposed concrete comprises the following components in parts by weight: 500 parts of cementing material and active SiO225 parts of rubber powder, 5 parts of synergist, 15 parts of toner, 2.5 parts of whiskering inhibitor and 600 parts of tough aggregate.
Example 3:
the invention provides a sand exposed concrete and a preparation method thereof, comprising the following steps:
1) casting a concrete base layer with the strength grade of C30 in situ, paving and vibrating the concrete base layer to be dense until the concrete surface layer has a mortar layer with the thickness of 5mm, and trowelling the mortar layer;
2) at a rate of 4kg/m2Weighing the exposed concrete surface hardening material according to the using amount, spreading the exposed concrete surface hardening material on the surface of the concrete base layer twice when the cast-in-place concrete base layer is close to initial setting, and trowelling and smoothing after the exposed concrete surface hardening material fully absorbs water and wets each time, wherein the first spreading amount of the surface hardening material is 2/3 of the total using amount, and the second spreading amount of the surface hardening material is 1/3 of the total using amount;
3) moisturizing and curing the concrete for 3 days to form a surface hardening layer of the exposed concrete;
4) spraying an aggressive agent mixed by hydrochloric acid, oxalic acid and water according to the volume ratio of 1:1:8 on the exposed sand concrete surface hardened layer, and then carrying out brushing treatment by adopting a plastic soft brush until surface gravel is exposed to the specified requirement to form an exposed sand surface layer;
5) after the erosion washing process is finished, the concrete is continuously moisturized and maintained for 10 days.
Further, the surface hardening material for the exposed concrete comprises the following components in parts by weight: 400 parts of cementing material and active SiO240 parts of rubber powder, 8 parts of a synergist, 16.5 parts of a toner, 2 parts of a whiskering inhibitor and 500 parts of tough aggregate.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the above embodiments describe the present invention in detail, those skilled in the art should understand that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and any modifications and equivalents may fall within the scope of the claims.
Claims (2)
1. The preparation method of the exposed concrete is characterized in that the exposed concrete adopts an exposed concrete surface hardening material and is subjected to erosion process treatment, and the exposed concrete surface hardening material comprises an exposed sand surface layer, an exposed concrete surface hardening layer and a concrete base layer; the surface hardening material for the exposed concrete comprises the following components in parts by weight: 500 portions of cementing material 320 and active SiO210.5 to 44.0 parts of rubber powder, 1.75 to 8.25 parts of rubber powder, 0.385 to 1.815 parts of synergist, 0 to 16.5 parts of toner, 1.05 to 4.40 parts of whiskering inhibitor and 650 parts of tough aggregate; the preparation method of the exposed concrete comprises the following steps:
1) the concrete base layer is cast in situ, and is paved, vibrated and compacted until the concrete surface layer has a mortar layer with the thickness of at least 3mm, and is trowelled;
2) when the cast-in-place concrete base layer is close to initial setting, spreading the surface hardening material of the exposed concrete on the surface of the concrete base layer twice, and trowelling and polishing after the surface hardening material of the exposed concrete fully absorbs water and wets each time;
3) moisturizing and curing the concrete for 3 days to form a surface hardening layer of the exposed concrete;
4) sprinkling an aggressive agent on the exposed sand concrete surface hardening layer, and then adopting a brush to carry out brushing treatment until surface gravel is exposed to the specified requirement to form an exposed sand surface layer;
5) continuously maintaining the concrete for at least 7 days;
the dosage of the surface hardening material of the exposed concrete is 4-6kg/m2The first dispensing amount is 2/3 of the total amount, and the second dispensing amount is 1/3 of the total amount;
the erosion agent is formed by mixing hydrochloric acid, oxalic acid or a mixture of the hydrochloric acid and the oxalic acid with water according to the volume ratio of 1: 3-4.
2. The method for preparing the exposed sand concrete according to claim 1, wherein the hairbrush is a plastic soft hairbrush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811319781.5A CN109372224B (en) | 2018-11-07 | 2018-11-07 | Exposed sand concrete and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811319781.5A CN109372224B (en) | 2018-11-07 | 2018-11-07 | Exposed sand concrete and preparation method thereof |
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| CN109372224A CN109372224A (en) | 2019-02-22 |
| CN109372224B true CN109372224B (en) | 2021-01-15 |
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| CN111635197A (en) * | 2020-06-16 | 2020-09-08 | 武汉夸克新材料有限公司 | Antique finish artistic concrete and preparation method thereof |
| CN111848215B (en) * | 2020-07-29 | 2022-11-04 | 浙江大东吴建筑科技有限公司 | Negative corrosion inhibitor capable of adjusting washing depth of exposed aggregate concrete and application thereof |
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| JP2001162613A (en) * | 1999-12-07 | 2001-06-19 | Three M Innovative Properties Co | Concrete product having retro-reflective surface and its manufacturing method |
| CN102704643B (en) * | 2012-06-20 | 2014-08-06 | 中国十七冶集团有限公司 | Manufacturing method for rinsing exposed aggregate colorful concrete external-hung wallboard |
| CN103806356B (en) * | 2014-02-28 | 2016-01-06 | 北京西奥兴业园林景观工程有限公司 | A kind of preparation method of decorative concrete earth construction |
| CN103938513B (en) * | 2014-04-17 | 2017-02-15 | 上海陆桥市政工程有限公司 | Construction process of colored pavement epoxy non-slip wearing layer structure |
| PL3112327T3 (en) * | 2015-06-30 | 2018-04-30 | Heidelbergcement Ag | Semi rigid coatings with increased grip and method for their manufacturing |
| CN106013725A (en) * | 2016-05-13 | 2016-10-12 | 中建三局集团有限公司 | Preparation method of novel cement base terrazzo floor |
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