CN117721950A - Self-heat-preservation disassembly-free prefabricated plate and preparation method thereof - Google Patents
Self-heat-preservation disassembly-free prefabricated plate and preparation method thereof Download PDFInfo
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- CN117721950A CN117721950A CN202311782159.9A CN202311782159A CN117721950A CN 117721950 A CN117721950 A CN 117721950A CN 202311782159 A CN202311782159 A CN 202311782159A CN 117721950 A CN117721950 A CN 117721950A
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- 238000004321 preservation Methods 0.000 title claims abstract description 91
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 17
- 229920000876 geopolymer Polymers 0.000 claims abstract description 13
- 239000002028 Biomass Substances 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical group OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 16
- 239000004088 foaming agent Substances 0.000 claims description 15
- 239000006260 foam Substances 0.000 claims description 13
- 239000003381 stabilizer Substances 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000010025 steaming Methods 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 239000000344 soap Substances 0.000 claims description 9
- 239000002585 base Substances 0.000 claims description 8
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000003513 alkali Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000006116 polymerization reaction Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 229920002545 silicone oil Polymers 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims 1
- 238000005345 coagulation Methods 0.000 claims 1
- 239000008235 industrial water Substances 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 235000019353 potassium silicate Nutrition 0.000 claims 1
- 239000002689 soil Substances 0.000 claims 1
- 238000005187 foaming Methods 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010097 foam moulding Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a self-heat-preservation disassembly-free prefabricated plate and a preparation method thereof, wherein the self-heat-preservation disassembly-free prefabricated plate comprises a prefabricated plate main body, the prefabricated plate main body comprises a reinforced mesh and concrete, a plurality of disassembly-free mould boxes which are prepared by curing foaming geopolymer in advance are packaged in the concrete, a plurality of heat preservation cavities are arranged in the disassembly-free mould boxes, fireproof heat preservation slurry which is prepared by biomass base is filled in the heat preservation cavities, and the prefabricated plate main body, the disassembly-free mould boxes and the fireproof heat preservation slurry are formed by maintaining an autoclave. The invention is convenient for foaming and forming the fireproof heat-preservation slurry, realizes self heat preservation, ensures that the whole plate has high energy saving rate, good sealing performance and excellent heat preservation performance and mechanical property, improves the condition of complex steam curing process in the traditional process, and saves the process and time cost of curing.
Description
Technical Field
The invention relates to the technical field of self-heat-preservation prefabricated plates, in particular to a self-heat-preservation die-stripping-free prefabricated plate and a preparation method thereof.
Background
In recent years, along with the high importance of the national energy conservation and environmental protection, the assembled building is developed as strong as the bamboo shoots after raining, and the requirements of people on the quality of life and the living environment are continuously improved, so that the development pace of the assembled building is accelerated. Although the assembly type building is convenient and quick to install, an important problem is heat preservation. The prior heat preservation technology mainly comprises external heat preservation, internal heat preservation, sandwich heat preservation, self heat preservation and the like, wherein the self heat preservation prefabricated plate is more suitable for the efficient and green concept of the fabricated building, and is widely applied.
However, conventional self-insulating prefabricated panels often have the following problems: the fireproof heat preservation performance is poor, the tightness is to be enhanced, the self-heat preservation die is not easy to detach, and the process flow is complicated and the energy consumption is high due to multiple steam curing. Therefore, how to improve the traditional self-insulation prefabricated plate to overcome the defects is an important problem to be solved in the field.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art and providing a self-heat-preservation and disassembly-free prefabricated plate with simple steaming process, good tightness and good fireproof and heat-preservation performance and a preparation method thereof.
The self-heat-preservation disassembly-free prefabricated plate comprises a prefabricated plate body, wherein the prefabricated plate body comprises a reinforcing mesh and concrete, a plurality of disassembly-free mould boxes which are prepared by curing foaming geopolymer in advance are packaged in the concrete, a plurality of heat preservation cavities are arranged in the disassembly-free mould boxes, the heat preservation cavities are filled with fireproof heat preservation slurry which is prepared by biomass base, and the prefabricated plate body, the disassembly-free mould boxes and the fireproof heat preservation slurry are formed by maintaining an autoclave.
The steel bar mesh is formed by binding and fixedly connecting a plurality of steel bars which are arranged in a crisscross manner, the disassembly-free mould box comprises a bottom box and a cover plate, the cover plate is tightly covered on the bottom box, the heat insulation cavity is formed by surrounding the bottom box and the cover plate, a plurality of positioning holes which are arranged corresponding to corresponding steel bars are formed in the side wall of the bottom box, and the disassembly-free mould box is clamped on the steel bar mesh through the steel bars which penetrate through the positioning holes and is poured into a whole by concrete.
In order to ensure that the disassembly-free mold box has higher porosity, high mechanical strength, strong bonding property, good durability, fire resistance, high temperature resistance, acid and alkali resistance, low energy consumption in the preparation process, small CO2 emission, no pollution, rich raw material sources, simple preparation process and low cost, the disassembly-free mold box is prepared by polymerizing an alkali excitant, a foaming agent and a foam stabilizer, wherein the alkali excitant is prepared by mixing and blending metakaolin, naOH particles and industrial sodium silicate, the foaming agent is hydrogen peroxide with the mass concentration of 30 percent, and the foam stabilizer is soap.
The fireproof heat-insulating slurry is prepared from carbonized biomass base, an inorganic binder, a foaming agent and a foam stabilizer through polymerization, wherein the inorganic binder is metakaolin base geopolymer, the foaming agent is hydrogen peroxide with the mass concentration of 30%, and the foam stabilizer is soap.
In order to ensure that the whole plate has high energy saving rate, good sealing performance and excellent heat preservation performance and mechanical property, the bottom box is connected with the cover plate in a mortise and tenon mode.
The preparation method for the self-heat-preservation disassembly-free prefabricated plate provided by the invention comprises the following steps of:
s1, manufacturing mold box free of disassembly
S11, manufacturing a first die and a second die which are consistent with the shapes of the bottom box and the cover plate;
s12, pouring geopolymer slurry to be foamed into a first die and a second die which are uniformly coated with a release agent;
s12, placing the first die and the second die which are filled with the good polymer slurry into a pre-curing autoclave box for pre-curing, wherein the temperature of pre-curing steam is 65-80 ℃ and the curing time is 3-5 h, so that the disassembly-free die box is primarily cured and formed, and has certain strength;
s2, manufacturing a third die which is consistent with the appearance of the precast slab main body, wherein a preformed hole which is convenient for steel bars to enter the die is arranged on the side wall of the third die, and the inner wall of the second die is uniformly coated with a release agent;
s3, taking the bottom box out of the first die and then placing the bottom box in a third die;
s4, penetrating the steel bars which are arranged in a crisscross manner through the bottom box and the second die, and binding to form a steel bar net sheet;
s5, preparing fireproof heat-preservation slurry, namely pouring the fireproof heat-preservation slurry into a heat-preservation cavity of the disassembly-free mold box, and ensuring that the filling amount of the fireproof heat-preservation slurry is 86% -88% of the heat-preservation cavity so as to realize self heat preservation; meanwhile, the fireproof heat-preservation slurry is prepared into 3 groups of test blocks under the same condition, and the test blocks are used for detecting heat preservation, mechanics and fireproof performance in different periods;
s6, covering a cover plate;
s7, horizontally pouring the uniformly stirred concrete slurry into a third die provided with a reinforcing mesh, wherein the concrete pouring temperature is 25-35 ℃; meanwhile, the concrete slurry is prepared into 3 groups of test blocks under the same condition and is used for detecting compressive strength and demolding strength in different periods;
s8, vibrating
The concrete slurry in the third die is vibrated mechanically, and meanwhile, a vibrating rod can be used as an aid to remove bubbles in the concrete slurry, so that the concrete slurry is tightly combined, and the strength of the concrete is ensured;
s9, steaming
Steaming in an autoclave for 100-120 min after vibrating, wherein the pressure in the autoclave rises to 1.1-1.2 MPa, the temperature in the autoclave is maintained at 180-200 ℃, the autoclave is kept at constant temperature and constant pressure for 8-12 h and then begins to reduce pressure, the pressure reducing time is 100-120 min, and the board is maintained to realize higher strength;
s10, demoulding finished product
And cooling to room temperature after steaming, taking out, carrying out standard curing for 28d, and demoulding to obtain the self-heat-preserving and demolding-free prefabricated plate.
In step S2, a magnetic cassette for fixing the third mold is bolted to the third mold.
In order to make the concrete and the third mold easily separate and make the concrete surface smooth and clean, in the step S2, the release agent is silicone oil.
In the step S5, the fireproof heat-preservation slurry is configured as follows: the carbonized biomass is used as a raw material, metakaolin-based geopolymer is used as an inorganic binder, 30% hydrogen peroxide is used as a foaming agent, soap is used as a foam stabilizer, the mixture is stirred and mixed, and the mixture is kept stand for 5-10min after stirring and mixing, and the mixture is uniformly mixed again to obtain the fireproof heat-preservation slurry.
In order to ensure the strength of the concrete, so that the concrete is not easy to deform and crack, in the step S7, the concrete slurry is prepared as follows: and (3) preparing according to the concrete proportion with the strength grade not lower than C25, stirring and mixing by adopting a forced stirrer, standing for 5-10min after stirring and mixing, and uniformly mixing again to obtain the concrete slurry.
Compared with the prior art, the invention has the following advantages:
1. through the mould box of exempting from to tear open that has the heat preservation cavity in the inside setting of prefabricated plate main part, can be convenient for pour into fire prevention heat preservation thick liquids, make the living beings base fire prevention heat preservation thick liquids that pour separate with the concrete of pouring again, be convenient for fire prevention heat preservation thick liquids foam molding realizes self preservation temperature, makes monoblock panel energy-saving rate high, and sealing performance is good, and heat preservation performance and mechanical properties are good.
2. The combined steam curing mode is adopted, the mold box is cured and formed by pre-curing the mold box without disassembling, the biomass-based fireproof heat-preservation slurry is poured firstly during manufacturing, concrete is poured after the mold box without disassembling is closed, the whole is formed, and finally the mold box is fed into an autoclave for curing and forming, so that the complex steam curing process condition of the traditional process is improved, and the curing process and the time cost are saved.
Drawings
Fig. 1 is a schematic view of a partial sectional structure of a self-insulating form removal-free prefabricated plate in the invention.
Fig. 2 is a schematic diagram of an explosion structure of the disassembly-free mold box in the invention.
FIG. 3 is a process flow diagram of the preparation method of the present invention.
Fig. 4 is a schematic structural diagram of step S3 in the preparation method of the present invention.
The labels shown in the figures and the corresponding component names are:
1. a prefabricated panel main body; 11. reinforcing steel bar meshes; 12. concrete;
2. the mould box is not disassembled; 21. a heat-preserving cavity; 22. a bottom box; 221. positioning holes; 23; a cover plate;
3. fireproof heat-insulating slurry;
4. a third mold; 41. a preformed hole; 42. a magnetic box.
Detailed Description
As can be seen from fig. 1, the self-heat-preservation disassembly-free prefabricated plate comprises a prefabricated plate main body 1 integrally maintained and formed by an autoclave, a disassembly-free mould box 2 and fireproof heat-preservation slurry 3, wherein the disassembly-free mould box 2 is prepared by curing foamed geopolymer in advance and is packaged in the prefabricated plate main body 1, a plurality of heat-preservation cavities 21 are arranged in the disassembly-free mould box 2, the fireproof heat-preservation slurry 3 is prepared by biomass base and is filled in the heat preservation Wen Kongqiang, the filling amount of the fireproof heat-preservation slurry 3 is 88% of the heat-preservation cavities 21, and a part of foaming space is reserved so as to realize self heat preservation.
As can be seen from fig. 1 to fig. 2, the prefabricated plate main body 1 in the invention comprises a reinforcing steel mesh 11 and concrete 12, wherein the reinforcing steel mesh 11 is formed by binding and fixedly connecting a plurality of reinforcing steel bars which are arranged in a crisscross manner, and is mainly used for improving the transverse bending strength and the longitudinal bending strength of the prefabricated plate;
the disassembly-free mould box 2 comprises a bottom box 22 and a cover plate 23, wherein a plurality of positioning holes 221 which are correspondingly arranged with corresponding steel bars are formed in the side wall of the bottom box 22, and the cover plate 23 is connected to the bottom box 22 in a mortise-tenon mode, so that the whole plate has high energy saving rate, good sealing performance and excellent heat preservation performance and mechanical performance; the heat-insulating cavity 21 is formed by surrounding a bottom box 22 and a cover plate 23, and the volume of the heat-insulating cavity 21 accounts for 30% -35% of the volume of the whole self-insulating disassembly-free precast slab, so that the fireproof heat-insulating slurry 3 is separated from the concrete 12, foaming is facilitated, and the heat-insulating effect is improved; the disassembly-free mould box 2 is clamped on the reinforcing mesh 11 through reinforcing bars penetrating through the positioning holes 221 and is poured into a whole by the concrete 12.
In the present invention, the prefabricated panel body 1 has a length of 4300mm, a width of 2300mm and a thickness of 60mm.
In the present invention, the disassembly-free mold 2 has a length of 1710mm, a width of 1710mm, an overall height of 40mm, and a thickness of 5mm for the bottom case 22 and the cover plate 23.
In the invention, the length of the fireproof heat-preservation slurry 3 is 1700mm, the width is 1700mm, and the thickness is 30mm.
In the invention, the disassembly-free mold box 2 is prepared by polymerization reaction of an alkali-exciting agent, a foaming agent and a foam stabilizer, wherein the alkali-exciting agent is prepared by respectively mixing metakaolin, industrial sodium silicate and NaOH particles with the weight of 8:7.3: the foaming agent is hydrogen peroxide with the mass concentration of 30%, and the foam stabilizer is soap, so that the disassembly-free mold box 2 has the advantages of higher porosity, high mechanical strength, strong bonding property, good durability, fire resistance, high temperature resistance, acid and alkali resistance and the like, and the energy consumption in the preparation process is lower, and the CO is low 2 The method has the advantages of small discharge, no pollution, abundant raw material sources, simple preparation process and low cost. The foaming agent takes the volume of the blank body as a standard, and 0.4kg-0.6kg of the foaming agent is added per cubic meter.
As shown in fig. 3 to 4, the preparation method of the self-heat-preservation disassembly-free prefabricated plate comprises the following steps:
s1, manufacturing of mold box 2 free of disassembly
S11, manufacturing a first die and a second die which are consistent with the shapes of the bottom box 22 and the cover plate 23;
s12, pouring geopolymer slurry to be foamed into a first die and a second die which are uniformly coated with a release agent;
s12, placing the first die and the second die which are filled with the polymer slurry into a pre-curing autoclave for pre-curing, wherein the temperature of pre-curing steam is 65 ℃ -80 ℃ (preferably 70 ℃), and the curing time is 3-5 hours, and the method mainly has the effect of enabling the foamed geopolymer to be subjected to preliminary curing molding without removing the die and has certain strength;
s2, manufacturing a third die 4 consistent with the appearance of the precast slab main body 1, wherein a preformed hole 41 for facilitating the steel bar 111 to enter the die is arranged on the side wall of the third die 4, and the inner wall of the second die 4 is uniformly coated with a release agent;
s3, taking the bottom box 22 out of the first die and then placing the bottom box 22 in the third die 4;
s4, penetrating the steel bars which are arranged in a crisscross manner through the bottom box 22 and the third die 4, and binding to form a steel bar net sheet 11;
s5, preparing fireproof heat-preservation slurry 3, pouring a part of fireproof heat-preservation slurry 3 into a heat-preservation cavity 21 of the disassembly-free mold box 2, ensuring that the filling amount of the fireproof heat-preservation slurry 3 is 86% -88% of the heat-preservation cavity, and reserving a part of foaming space to realize self heat preservation of the prefabricated plate; meanwhile, a part of fireproof heat-preservation slurry 3 is prepared into 3 groups of test blocks with the same condition, and the test blocks are used for detecting heat preservation, mechanics and fireproof performance in different periods;
s6, covering the cover plate 23 to ensure that the volume of the heat-insulating cavity 21 accounts for 30% -35% of the volume of the whole self-heat-insulating disassembly-free prefabricated plate;
s7, horizontally pouring a part of uniformly stirred concrete slurry into a third die 4 provided with a reinforcing mesh 11, wherein the concrete pouring temperature is 25 ℃ -35 ℃ (preferably 30 ℃); meanwhile, a part of concrete slurry is prepared into 3 groups of test blocks under the same condition for detecting compressive strength and demolding strength in different periods;
s8, vibrating
The concrete slurry in the third mould 4 is vibrated mechanically, and meanwhile, a vibrating rod can be used as an aid to remove bubbles in the concrete, so that the concrete is tightly combined, and the strength of the concrete is ensured;
s9, steaming
Steaming in an autoclave for 100-120 min after vibrating, wherein the pressure in the autoclave rises to 1.1-1.2 MPa, the temperature in the autoclave is maintained at 180-200 ℃, the autoclave is kept constant temperature and pressure for 8-12 h (preferably 10 h) and then begins to reduce the pressure for 100-120 min;
s10, demoulding finished product
And cooling to room temperature after steaming, taking out, carrying out standard curing for 28d, and demoulding to obtain the self-heat-preserving and demolding-free prefabricated plate.
In step S2, a magnet box 42 for fixing the third mold is bolted to the third mold 4.
In the step S2, the release agent is silicone oil, and is mainly used for enabling the concrete 12 to be easily separated from the third mould 4, and the surface of the concrete 2 is smooth and clean;
in step S5, the process of preparing the fireproof insulation paste 3 is as follows: the carbonized biomass is used as a raw material, the metakaolin-based geopolymer is used as an inorganic binder, 30% hydrogen peroxide is used as a foaming agent, soap is used as a foam stabilizer, the soap is stirred and mixed, and the mixture is kept stand for 5-10min after stirring and mixing, and is uniformly mixed again to obtain the fireproof heat-preservation slurry, so that the fireproof heat-preservation slurry has high porosity, excellent heat-preservation performance and mechanical property, the fireproof grade can reach A-grade incombustibility, and the raw material source is rich, the preparation process is simple, and the cost is low.
In step S7, the concrete slurry is prepared as follows: and (3) preparing according to the concrete proportion with the strength grade not lower than C25, stirring and mixing by adopting a forced stirrer, standing for 5-10min after stirring and mixing, and uniformly mixing again to obtain the concrete slurry.
In the invention, the stress ratio of the reinforcing mesh 11 to the concrete 12 is generally about 2.5:1-3.5:1, and the stress ratio is determined according to specific conditions, and comprises factors such as bearing capacity, service life and the like, so that the reinforcing mesh has higher bearing capacity and service life.
In the invention, the number of the heat preservation cavities 21 can be two, four or six, and the heat preservation cavities are determined according to the stress condition of the plate and the heat preservation volume required by the plate, are convenient to operate and have good heat preservation performance.
Claims (10)
1. The utility model provides a self preservation temperature exempts from to unpick and mould prefabricated panel, includes prefabricated plate main part (1), prefabricated plate main part includes reinforcing bar net piece (11) and concrete (12), its characterized in that: the concrete is internally packaged with a plurality of disassembly-free mould boxes (2) which are made of foamed geopolymer through curing, a plurality of heat preservation cavities (21) are formed in the disassembly-free mould boxes, the heat preservation cavities are filled with fireproof heat preservation slurry (3) which is made of biomass base, and the precast slab main body, the disassembly-free mould boxes and the fireproof heat preservation slurry are formed by maintaining an autoclave.
2. The self-insulating, disassembly-free prefabricated panel according to claim 1, wherein: the steel bar mesh is formed by binding and fixedly connecting a plurality of steel bars which are arranged in a crisscross manner, the disassembly-free mould box comprises a bottom box (22) and a cover plate (23), the cover plate is tightly covered on the bottom box, the heat insulation cavity is formed by surrounding the bottom box and the cover plate, a plurality of positioning holes (221) which are arranged corresponding to corresponding steel bars are formed in the side wall of the bottom box, and the disassembly-free mould box is clamped on the steel bar mesh through the steel bars which penetrate through the positioning holes and is poured into a whole by concrete.
3. The self-insulating, disassembly-free prefabricated panel according to claim 1, wherein: the disassembly-free mould box is prepared by polymerization reaction of an alkali excitant, a foaming agent and a foam stabilizer, wherein the alkali excitant is prepared by mixing metakaolin, naOH particles and industrial water glass, the foaming agent is hydrogen peroxide with the mass concentration of 30%, and the foam stabilizer is soap.
4. The self-insulating, disassembly-free prefabricated panel according to claim 1, wherein: the fireproof heat-preservation slurry is prepared by a polymerization reaction of carbonized biomass base, an inorganic binder, a foaming agent and a foam stabilizer, wherein the inorganic binder is metakaolin base geopolymer, the foaming agent is hydrogen peroxide with the mass concentration of 30%, and the foam stabilizer is soap.
5. The self-heat-preserving form removal-free prefabricated panel according to claim 2, wherein: the bottom box is connected with the cover plate in a mortise and tenon mode.
6. The method for preparing the self-heat-preservation and disassembly-free prefabricated plate material as claimed in claim 2, which is characterized by comprising the following steps:
s1, manufacturing a disassembly-free mould box (2)
S11, manufacturing a first die and a second die which are consistent with the shapes of the bottom box (22) and the cover plate (23);
s12, pouring geopolymer slurry to be foamed into a first die and a second die which are uniformly coated with a release agent; s12, placing the first die and the second die which are filled with the good polymer slurry into a pre-curing autoclave for pre-curing, wherein the temperature of pre-curing steam is 65-80 ℃, and the curing time is 3-5 h;
s2, manufacturing a third die (4) which is consistent with the appearance of the precast slab main body (1), wherein a preformed hole (41) which is convenient for steel bars to enter the die is arranged on the side wall of the third die, and the inner wall of the second die is uniformly coated with a release agent;
s3, taking the bottom box out of the first die and then placing the bottom box in a third die;
s4, penetrating the steel bars which are arranged in a crisscross manner through the bottom box and the third die, and binding to form a steel bar net sheet (11);
s5, preparing fireproof heat-preservation slurry (3), pouring the fireproof heat-preservation slurry into a heat-preservation cavity of the disassembly-free mold box, and ensuring that the filling amount of the fireproof heat-preservation slurry is 86% -88% of the heat-preservation cavity; meanwhile, the fireproof heat-preservation slurry is prepared into 3 groups of test blocks under the same condition, and the test blocks are used for detecting heat preservation, mechanics and fireproof performance in different periods;
s6, covering a cover plate;
s7, horizontally pouring the uniformly stirred concrete slurry into a third die provided with a reinforcing mesh, wherein the concrete pouring temperature is 25-35 ℃; meanwhile, the concrete slurry is prepared into 3 groups of test blocks under the same condition and is used for detecting compressive strength and demolding strength in different periods;
s8, vibrating
Mechanically vibrating the concrete slurry in the third mold, and simultaneously using a vibrating rod as an aid;
s9, steaming
Steaming in an autoclave for 100-120 min after vibrating, wherein the pressure in the autoclave rises to 1.1-1.2 MPa, the temperature in the autoclave is maintained at 180-200 ℃, the autoclave is kept constant temperature and pressure for 8-12 h and then begins to reduce pressure for 100-120 min;
s10, demoulding finished product
And cooling to room temperature after steaming, taking out, carrying out standard curing for 28d, and demoulding to obtain the self-heat-preserving and demolding-free prefabricated plate.
7. The method for preparing the self-heat-preservation disassembly-free prefabricated plate, which is characterized by comprising the following steps of: in the step S2, a magnetic box (42) for fixing the third mold is connected to the third mold by bolts.
8. The method for preparing the self-heat-preservation disassembly-free prefabricated plate, which is characterized by comprising the following steps of: in the step S2, the release agent is silicone oil.
9. The method for preparing a self-insulating, disassembly-free prefabricated panel according to claim 6, wherein in step S5, the fireproof and thermal insulation slurry is prepared as follows: the carbonized biomass is used as a raw material, metakaolin-based geopolymer is used as an inorganic binder, 30% hydrogen peroxide is used as a foaming agent, soap is used as a foam stabilizer, the mixture is stirred and mixed, and the mixture is kept stand for 5-10min after stirring and mixing, and the mixture is uniformly mixed again to obtain the fireproof heat-preservation slurry.
10. The method for preparing a self-insulating form removal-free precast slab according to claim 6, wherein in the step S7, the concrete slurry is prepared as follows: coagulation according to a strength grade not lower than C25
Mixing the soil, stirring and mixing with a forced stirrer, standing for 5-10min,
and mixing uniformly again to obtain concrete slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311782159.9A CN117721950A (en) | 2023-12-22 | 2023-12-22 | Self-heat-preservation disassembly-free prefabricated plate and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311782159.9A CN117721950A (en) | 2023-12-22 | 2023-12-22 | Self-heat-preservation disassembly-free prefabricated plate and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117721950A true CN117721950A (en) | 2024-03-19 |
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ID=90210518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311782159.9A Pending CN117721950A (en) | 2023-12-22 | 2023-12-22 | Self-heat-preservation disassembly-free prefabricated plate and preparation method thereof |
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| Country | Link |
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| CN (1) | CN117721950A (en) |
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2023
- 2023-12-22 CN CN202311782159.9A patent/CN117721950A/en active Pending
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