CN114368952A - Steam-curing-free concrete prefabricated part and forming method thereof - Google Patents
Steam-curing-free concrete prefabricated part and forming method thereof Download PDFInfo
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- CN114368952A CN114368952A CN202210136052.6A CN202210136052A CN114368952A CN 114368952 A CN114368952 A CN 114368952A CN 202210136052 A CN202210136052 A CN 202210136052A CN 114368952 A CN114368952 A CN 114368952A
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- Prior art keywords
- curing
- prefabricated part
- parts
- early strength
- concrete prefabricated
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Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 16
- 239000011398 Portland cement Substances 0.000 claims abstract description 9
- 239000002131 composite material Substances 0.000 claims abstract description 9
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 9
- 239000010440 gypsum Substances 0.000 claims abstract description 9
- 239000013078 crystal Substances 0.000 claims abstract description 7
- 239000011550 stock solution Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 20
- 239000002994 raw material Substances 0.000 claims description 16
- 239000002985 plastic film Substances 0.000 claims description 8
- 229920006255 plastic film Polymers 0.000 claims description 8
- 229920001353 Dextrin Polymers 0.000 claims description 7
- 239000004375 Dextrin Substances 0.000 claims description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 7
- 229920002472 Starch Polymers 0.000 claims description 7
- 239000011149 active material Substances 0.000 claims description 7
- 239000000654 additive Substances 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 7
- 229920003086 cellulose ether Polymers 0.000 claims description 7
- 235000019425 dextrin Nutrition 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 7
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 7
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 7
- 239000008107 starch Substances 0.000 claims description 7
- 235000019698 starch Nutrition 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000002542 deteriorative effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000009471 action Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2623—Polyvinylalcohols; Polyvinylacetates
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2641—Polyacrylates; Polymethacrylates
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
- C04B24/383—Cellulose or derivatives thereof
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
Abstract
The invention discloses a steam-curing-free concrete prefabricated part and a forming method thereof, wherein the steam-curing-free concrete prefabricated part mainly comprises the following components in percentage by weight: an early strength-improving component consisting of portland cement, a crystalline core type early strength agent, an organic composite early strength agent and desulfurized gypsum, an adhesion-improving component and a durability-improving component. The invention can early strengthen the unformed stock solution by the Portland cement, the crystal nucleus type early strength agent, the organic composite early strength agent and the desulfurized gypsum, so that the unformed stock solution can be firm without a steam curing process, and the problems that the steam curing process has a steam curing process during the production of the existing concrete prefabricated part, and part of water is converted into gas along with the rise of the temperature, so that the expansion effect is more intensified, the porosity in the concrete can be increased due to the expansion of the pressure in the hole, and the internal micro cracks can be generated due to the increase of the pressure in the hole are solved.
Description
Technical Field
The invention relates to the technical field of concrete prefabricated parts, in particular to a steam-curing-free concrete prefabricated part and a forming method thereof.
Background
The concrete precast element is a building element which is made in advance in a factory by taking concrete as a basic material, and comprises a beam, a plate, a column, a building decoration fitting and the like, but the existing concrete precast element has a steam curing process in production, and part of water is converted into gas along with the rise of temperature in the steam curing process, so that the expansion action is further intensified, the porosity in the concrete is increased, and the internal microcracks are also generated due to the increase of the pressure in the holes.
Disclosure of Invention
In order to solve the problems of the background art, the invention aims to provide a steam-curing-free concrete prefabricated part and a forming method thereof, which have the advantage of steam curing prevention and solve the problems that the existing concrete prefabricated part has a steam curing process during production, and part of water is converted into gas along with the increase of temperature in the steam curing process, so that the expansion effect is further intensified, the expansion effect can increase the porosity in the concrete, and the internal microcracks can be generated due to the increase of the pressure in holes.
In order to achieve the purpose, the invention provides the following technical scheme: the non-autoclaved concrete prefabricated part comprises the following main components in a molding formula: an early strength-improving component, a cohesiveness-improving component and a durability-improving component.
Preferably, the early strength-improving component comprises portland cement, a nuclear early strength agent, an organic composite early strength agent and desulfurized gypsum, the cohesiveness-improving component comprises cellulose ether, starch, dextrin, sodium polyacrylate and polyvinyl alcohol, and the durability-improving component comprises coarse aggregate, fine aggregate, an active material and an additive.
Preferably, the contents of the components are as follows: portland cement 200kg/m3100kg/m of crystal nucleus type early strength agent3110kg/m of organic composite early strength agent385kg/m of desulfurized gypsum310 parts of cellulose ether, 25 parts of starch, 10 parts of dextrin, 5 parts of sodium polyacrylate, 8 parts of polyvinyl alcohol, 80 parts of coarse aggregate, 85 parts of fine aggregate, 80 parts of active material and 75 parts of additive.
The non-autoclaved concrete prefabricated part and the forming method thereof comprise the steps of a) dry-wet stirring; step b), installing a mold; c) pouring and forming; step d) concrete curing;
step a), stirring dry and wet; the raw materials are subjected to dry stirring and then wet stirring, and the stirring is carried out for 40-60 s.
Step b), installing a mold; and (4) installing and molding the die, and then wiping off dust on the surface of the die.
C) pouring and forming; pouring the stirred raw materials into a mold, and initially molding the raw materials.
Step d) concrete curing; the concrete curing adopts natural curing, and a layer of plastic film is covered on the surface of the concrete in the curing process.
Preferably, the dry and wet stirring is performed by sequentially adding the components according to the proportion, and all the components cannot be directly added.
Preferably, the mold is sterilized before being installed, so that raw materials are prevented from deteriorating.
Preferably, the pouring opening is surrounded when the pouring is formed, so that the stock solution is prevented from falling to the ground.
Preferably, the plastic film covering the concrete during curing maintains the internal sealing property so as to keep the internal prefabricated parts wet.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can strengthen the unformed stock solution in early stage by the Portland cement, the crystal nucleus type early strength agent, the organic composite early strength agent and the desulfurized gypsum, so that the unformed stock solution can be firm without a steam curing process, the cellulose ether, the starch, the dextrin, the sodium polyacrylate and the polyvinyl alcohol can improve the viscosity among all the internal components, avoid the phenomenon that the components cannot be fused together, the use durability of the prefabricated member can be improved and the service life of the prefabricated member can be prolonged through the coarse aggregate, the fine aggregate, the active material and the additive, the problem that the existing concrete prefabricated member has a steam curing process during production, and part of water is converted into gas along with the rise of temperature in the steam curing process is solved, thereby further increasing the expansion which increases the porosity in the concrete and also causes the problem of micro-cracks in the interior due to the increase of the pressure in the pores.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a steam-curing-free concrete prefabricated part and a forming method thereof, wherein the main components of the forming formula of the steam-curing-free concrete prefabricated part are as follows: an early strength-improving component, a cohesiveness-improving component and a durability-improving component.
The invention is further set that the early strength improving component consists of portland cement, a crystal nucleus type early strength agent, an organic composite early strength agent and desulfurized gypsum, the cohesiveness improving component consists of cellulose ether, starch, dextrin, sodium polyacrylate and polyvinyl alcohol, and the durability improving component consists of coarse aggregate, fine aggregate, an active material and an additive.
The invention is further provided that the content of each component is as follows: portland cement 200kg/m3100kg/m of crystal nucleus type early strength agent3110kg/m of organic composite early strength agent385kg/m of desulfurized gypsum310 parts of cellulose ether, 25 parts of starch, 10 parts of dextrin, 5 parts of sodium polyacrylate, 8 parts of polyvinyl alcohol, 80 parts of coarse aggregate, 85 parts of fine aggregate, 80 parts of active material and 75 parts of additive.
The invention provides a steam-curing-free concrete prefabricated part and a forming method thereof, comprising the steps of a) stirring dry and wet materials; step b), installing a mold; c) pouring and forming; step d) concrete curing;
step a), stirring dry and wet; the raw materials are subjected to dry stirring and then wet stirring, and the stirring is carried out for 40-60 s.
Step b), installing a mold; and (4) installing and molding the die, and then wiping off dust on the surface of the die.
C) pouring and forming; pouring the stirred raw materials into a mold, and initially molding the raw materials.
Step d) concrete curing; the concrete curing adopts natural curing, and a layer of plastic film is covered on the surface of the concrete in the curing process.
The invention is further set that the dry and wet stirring needs to be carried out in sequence according to the proportion, and the dry and wet stirring cannot be carried out directly.
The invention is further set that the mould is sterilized firstly when the mould is installed, so that the raw materials are prevented from deteriorating.
The invention is further set that the pouring opening is surrounded when pouring and forming are carried out, and the stock solution is prevented from falling on the ground.
The invention is further configured such that the plastic film covering the concrete during curing maintains the internal tightness and keeps the internal prefabricated parts moist.
The working principle and the using process of the invention are as follows: firstly, carrying out dry mixing and wet mixing on raw materials, stirring for 40-60 s, sequentially adding the raw materials in proportion during dry-wet mixing, wherein the raw materials cannot be completely and directly added, then installing and forming a mould, wiping dust on the surface of the mould clean, then carrying out sterilization treatment on the mould, pouring the stirred raw materials into the mould to carry out initial forming, carrying out natural curing on the formed concrete, covering a layer of plastic film on the surface of the concrete during curing, and keeping the inside tightness of the covered plastic film so as to keep the inside prefabricated component moist, thereby achieving the effect of avoiding steam curing.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A steam-curing-free concrete prefabricated part and a forming method thereof are characterized in that: the steam-curing-free concrete prefabricated part comprises the following main components in percentage by weight: an early strength-improving component, a cohesiveness-improving component and a durability-improving component.
2. The non-autoclaved concrete prefabricated part and the forming method thereof according to claim 1, wherein: the early strength improving component consists of portland cement, a crystal nucleus type early strength agent, an organic composite early strength agent and desulfurized gypsum, the cohesiveness improving component consists of cellulose ether, starch, dextrin, sodium polyacrylate and polyvinyl alcohol, and the durability improving component consists of coarse aggregate, fine aggregate, an active material and an additive.
3. The non-autoclaved concrete prefabricated part and the forming method thereof according to claim 1, wherein: the contents of the components are as follows: portland cement 200kg/m3100kg/m of crystal nucleus type early strength agent3110kg/m of organic composite early strength agent385kg/m of desulfurized gypsum310 parts of cellulose ether, 25 parts of starch, 10 parts of dextrin, 5 parts of sodium polyacrylate, 8 parts of polyvinyl alcohol, 80 parts of coarse aggregate, 85 parts of fine aggregate, 80 parts of active material and 75 parts of additive.
4. The non-autoclaved concrete prefabricated part and the forming method thereof according to claim 1, wherein: comprising the steps of a) stirring dry and wet; step b), installing a mold; c) pouring and forming; step d) concrete curing;
step a), stirring dry and wet; the raw materials are subjected to dry stirring and then wet stirring, and the stirring is carried out for 40-60 s.
Step b), installing a mold; and (4) installing and molding the die, and then wiping off dust on the surface of the die.
C) pouring and forming; pouring the stirred raw materials into a mold, and initially molding the raw materials.
Step d) concrete curing; the concrete curing adopts natural curing, and a layer of plastic film is covered on the surface of the concrete in the curing process.
5. The non-autoclaved concrete prefabricated part and the forming method thereof according to claim 4, wherein: and during dry-wet stirring, the materials are required to be sequentially put in proportion, and the materials cannot be completely and directly put in.
6. The non-autoclaved concrete prefabricated part and the forming method thereof according to claim 4, wherein: when the die is installed, the die is sterilized firstly, so that raw materials are prevented from deteriorating.
7. The non-autoclaved concrete prefabricated part and the forming method thereof according to claim 4, wherein: when pouring and forming are carried out, the pouring opening is surrounded, and stock solution is prevented from being scattered on the ground.
8. The non-autoclaved concrete prefabricated part and the forming method thereof according to claim 4, wherein: the plastic film covering the concrete during curing is to maintain the internal tightness so that the internal prefabricated parts are kept wet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210136052.6A CN114368952A (en) | 2022-02-15 | 2022-02-15 | Steam-curing-free concrete prefabricated part and forming method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210136052.6A CN114368952A (en) | 2022-02-15 | 2022-02-15 | Steam-curing-free concrete prefabricated part and forming method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114368952A true CN114368952A (en) | 2022-04-19 |
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ID=81146158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210136052.6A Pending CN114368952A (en) | 2022-02-15 | 2022-02-15 | Steam-curing-free concrete prefabricated part and forming method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114368952A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249846A (en) * | 2017-12-13 | 2018-07-06 | 镇江建科建设科技有限公司 | A kind of non-evaporating curing concrete prefabricated components and its forming method |
| CN108529986A (en) * | 2018-05-22 | 2018-09-14 | 上海宝岳住宅工业有限公司 | A kind of non-evaporating curing concrete prefabricated components of low-temperature high-early strength and its production method |
| CN108840624A (en) * | 2018-07-09 | 2018-11-20 | 武汉理工大学 | A kind of rapid curing light weight board and preparation method thereof suitable for assembled architecture |
| CN113773022A (en) * | 2021-09-27 | 2021-12-10 | 明阳智慧能源集团股份公司 | White clear water finish concrete for prefabricated parts and preparation method thereof |
-
2022
- 2022-02-15 CN CN202210136052.6A patent/CN114368952A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249846A (en) * | 2017-12-13 | 2018-07-06 | 镇江建科建设科技有限公司 | A kind of non-evaporating curing concrete prefabricated components and its forming method |
| CN108529986A (en) * | 2018-05-22 | 2018-09-14 | 上海宝岳住宅工业有限公司 | A kind of non-evaporating curing concrete prefabricated components of low-temperature high-early strength and its production method |
| CN108840624A (en) * | 2018-07-09 | 2018-11-20 | 武汉理工大学 | A kind of rapid curing light weight board and preparation method thereof suitable for assembled architecture |
| CN113773022A (en) * | 2021-09-27 | 2021-12-10 | 明阳智慧能源集团股份公司 | White clear water finish concrete for prefabricated parts and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 魏文彪, 中国铁道出版社 * |
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Application publication date: 20220419 |
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