CN111499302B - Preparation process of concrete prefabricated wallboard - Google Patents
Preparation process of concrete prefabricated wallboard Download PDFInfo
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- CN111499302B CN111499302B CN202010335906.4A CN202010335906A CN111499302B CN 111499302 B CN111499302 B CN 111499302B CN 202010335906 A CN202010335906 A CN 202010335906A CN 111499302 B CN111499302 B CN 111499302B
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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
-
- 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
- B28B1/04—Producing shaped prefabricated articles from the material by tamping or ramming
- B28B1/045—Producing shaped prefabricated articles from the material by tamping or ramming combined with vibrating or jolting
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- 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
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- 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
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
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- 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
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0002—Auxiliary parts or elements of the mould
-
- 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
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0002—Auxiliary parts or elements of the mould
- B28B7/0011—Mould seals
-
- 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
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0002—Auxiliary parts or elements of the mould
- B28B7/0014—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps
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- 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
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/02—Moulds with adjustable parts specially for modifying at will the dimensions or form of the moulded article
- B28B7/025—Moulds with adjustable parts specially for modifying at will the dimensions or form of the moulded article the mould surface being made of or being supported by a plurality of small elements, e.g. to create double curvatures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/44—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose
- E04C2/46—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose specially adapted for making walls
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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
Abstract
The invention relates to the technical field of wallboards, and discloses a preparation process of a concrete prefabricated wallboard, which comprises the following steps: s1: preparing a mould; s2: installing steel bars; installing reinforcing steel bars in the die after the preparation of the S1 die; s3: pouring concrete; pouring concrete towards the interior of the mould after the treatment of S2; the concrete comprises the following raw materials in parts by weight: 180-240 parts of cement, 550-630 parts of coarse aggregate, 100-150 parts of fine aggregate, 300-430 parts of fly ash, 6-15 parts of calcium lignosulfonate, 60-80 parts of water, 20-40 parts of fatty alcohol-polyoxyethylene ether and 13-37 parts of acrylamide graft copolymer starch; s4: vibrating and maintaining; vibrating the concrete poured in the S3 and curing and forming; s5: disassembling the mould; s6: maintaining continuously; and (5) after continuous curing of S6, preparing the concrete prefabricated wall panel. Can make the prefabricated wallboard of making avoid appearing the crack to improve the compressive strength of prefabricated wallboard.
Description
Technical Field
The invention relates to the technical field of wallboards, in particular to a preparation process of a concrete prefabricated wallboard.
Background
With the gradual and violent scientific and technical competition, the country gradually promotes the development of building technology, and the prefabrication technology is gradually started in recent years, so that prefabricated wallboards, prefabricated columns, prefabricated stairs, prefabricated bridges and the like are provided. When the prefabricated member is manufactured, a worker pours concrete into a mold, uniformly vibrates the concrete by using a vibrator, and then maintains the prefabricated member at a certain temperature for a period of time to form the concrete; finally, the mold is removed, thereby obtaining a preform.
When preparing prefabricated wallboard, after the staff pours the concrete into the mould, at the in-process of prefabricated wallboard maintenance, the concrete sets the shaping, at the in-process that solidifies, prefabricated wallboard is because inside and outside temperature difference's reason, prefabricated wallboard self produces easily shrink, the factor of inflation and differential settlement causes structural deformation, thereby make to produce the deformation stress in the prefabricated wallboard, lead to prefabricated wallboard to produce the crack, finally lead to having the crack on the prefabricated wallboard that prepares, thereby make the compressive strength reduction of prefabricated wallboard.
Disclosure of Invention
The invention aims to provide a preparation process of a concrete prefabricated wallboard, which can prevent the manufactured prefabricated wallboard from cracking so as to improve the compressive strength of the prefabricated wallboard.
The technical purpose of the invention is realized by the following technical scheme:
a preparation process of a concrete prefabricated wall panel comprises the following steps:
s1: preparing a mould;
s2: installing steel bars; installing reinforcing steel bars in the die after the preparation of the S1 die;
s3: pouring concrete; pouring concrete towards the interior of the mould after the treatment of S2; the concrete comprises the following raw materials in parts by weight: 180-240 parts of cement, 550-630 parts of coarse aggregate, 100-150 parts of fine aggregate, 300-430 parts of fly ash, 6-15 parts of calcium lignosulfonate, 60-80 parts of water, 20-40 parts of fatty alcohol-polyoxyethylene ether and 13-37 parts of acrylamide graft copolymer starch;
s4: vibrating and maintaining; vibrating the concrete poured in the S3 and curing and forming;
s5: disassembling the mould; disassembling the mold after the processing of S4;
s6: maintaining continuously; continuously curing the concrete subjected to the disassembly in the step S5;
and (5) after continuous curing of S6, preparing the concrete prefabricated wall panel.
By adopting the technical scheme, the use amount of the coarse aggregate in the raw materials of the concrete is controlled to be 550-630 parts, the use amount of the cement can be reduced, and the calcium lignosulfonate is used in combination with the cement, so that the workability of the concrete can be improved, the hydration heat can be reduced, and the shrinkage deformation of the concrete can be reduced. The use of a small amount of fine aggregate can improve the service performance of cement and reduce plastic shrinkage. Meanwhile, the fly ash is added into the concrete, so that the workability of the concrete can be improved, the shrinkage is reduced, a good cooling effect is achieved, the performance of the concrete is ensured, and cracks caused by large temperature difference inside and outside the concrete are prevented. By using the fatty alcohol-polyoxyethylene ether, the calcium lignosulfonate and the acrylamide graft copolymer starch in a synergistic manner, the properties of the concrete can be more stable, and the generation of deformation stress is reduced. Meanwhile, the acrylamide grafted copolymer starch can improve the ion migration resistance of concrete and improve the durability of the concrete, so that the stability of the wallboard caused by finally using the concrete is stronger, and the prefabricated wallboard is further prevented from generating cracks.
As a further improvement of the invention, the raw materials of the concrete also comprise 13 to 30 parts by weight of dipentaerythritol hexahydroxy stearate.
Through adopting above-mentioned technical scheme, through adding dipentaerythritol hexahydroxy stearate in the raw materials at the concrete, can act on in the gap between coarse aggregate and the fine aggregate, then interact with cement to make combining more firm between fine aggregate and the coarse aggregate, make the prefabricated wallboard that finally makes appear the possibility of crack lower.
As a further improvement of the invention, the concrete also comprises 1-4 parts of polycarboxylic acid water reducing agent by weight.
Through adopting above-mentioned technical scheme, polycarboxylate water reducing agent itself can directional absorption and cement granule surface for cement granule surface adheres to there is the electric charge, forms electrostatic repulsion's effect, thereby makes cement granule interdispersion. Because the dispersibility of cement granule has improved, therefore the cement granule of dispersion can destroy the flocculation structure, releases the water by the parcel for water can participate in with cement and other raw materials and flow, can promote the mobility of concrete when solidification and maintenance shaping through adding polycarboxylate water reducing agent, thereby makes the concrete can be more even.
As a further improvement of the invention, the raw materials of the concrete also comprise 2 to 7 parts by weight of glycerol stearate citrate.
By adopting the technical scheme, the glycerol stearate citrate is added into the raw materials of the concrete, so that the mixed liquid of the glycerol stearate citrate, the polycarboxylic acid water reducing agent and the dipentaerythritol hexahydroxy stearate has stronger surface activity, is adsorbed on the surface of unhydrated cement particles, promotes the solidification speed of the concrete, prevents the water evaporation loss caused by too slow solidification time of cement paste, and enables the strength of the finally prepared prefabricated wallboard to be higher.
As a further improvement of the invention, the S1 mold is prepared, the mold includes a side plate, a corner plate and an end plate, and two opposite sides of the side plate are respectively provided with a groove and a first bump; the first lug is inserted into the groove of the adjacent side plate and is connected with the groove in a sliding manner; and a positioning piece used for releasing and fixing the first bump is arranged on the outer side wall of the side plate close to the groove.
Through adopting above-mentioned technical scheme, through setting up the mould into the concatenation formula, on the one hand can easy to assemble to according to the demand of actual prefabricated wallboard and the size of adjustment mould, thereby can improve the application scope of mould. On the other hand, can be through the release and the fixed of setting element to first lug to can finely tune the distance between two adjacent curb plates, can enlarge the distance between the adjacent curb plate to prefabricated wallboard during the maintenance because the higher emergence of ambient temperature expands, thereby can provide the reserved space for the concrete after the inflation, prevent that the concrete is because the inflation is in the extrusion die.
As a further improvement of the invention, the side plate is provided with a kidney-shaped hole communicated with the groove along the length direction thereof, and the positioning piece is a positioning bolt in threaded connection with the first bump; the rod part of the positioning bolt penetrates through the waist-shaped hole, and the head part of the positioning bolt, which is far away from the first bump, is tightly abutted against the outer side wall of the side plate.
Through adopting above-mentioned technical scheme, when the distance between two adjacent curb plates needs to be adjusted, twist and move positioning bolt, make positioning bolt's head and the lateral wall of curb plate throw off, then the curb plate of the first lug grafting in the recess slides, thereby make positioning bolt slide in waist type hole, after the distance between two blocks of curb plates that link to each other is adjusted and is accomplished, twist and move positioning bolt, make positioning bolt's head and the lateral wall of curb plate support tightly, finally it is fixed with two adjacent curb plates, moreover, the steam generator is simple in structure, it is convenient to adjust, and along with the slip of first lug, positioning bolt also slides along with it, positioning bolt has the effect of instructing first lug distance of sliding, thereby the staff can more audio-visually observe the distance that first lug slided, thereby can make the precision of distance adjustment between the adjacent both sides board higher.
As a further improvement of the invention, the side plate is provided with a plug hole along the length direction thereof, and the side plate is provided with a template pipe which is coaxial with the plug hole and is used for blocking the plug hole; the template pipe is communicated with the plug hole, and a blocking plate used for blocking the template pipe is detachably arranged at the end part, far away from the side plate, of the template pipe; the side wall of the side plate, which is far away from the template pipe, is provided with a leak-proof plate; one end of the anti-leakage plate is connected to one side of the side plate close to the first bump, and the side wall of the other end of the anti-leakage plate is abutted against the side wall of the adjacent side plate far away from the template pipe; the height of the anti-leakage plate in the vertical direction is consistent with that of the side plate in the vertical direction.
Through adopting above-mentioned technical scheme, through seting up the spliced eye on the curb plate to detachable is provided with the barrier plate on the template pipe, in needs installation reinforcing bar, dismantles the barrier plate, then inserts the reinforcing bar, and after the reinforcing bar installation finishes, install the barrier plate on the template pipe again, thereby the reinforcing bar of easy to assemble can prevent simultaneously that the concrete from oozing from the curb plate along the spliced eye, has reduced the worker of concrete and has consumed, has reduced the waste volume of concrete.
As a further improvement of the invention, the raw materials of the concrete also comprise 2-5 parts of micro silicon powder by weight.
Through adopting above-mentioned technical scheme, through adding silica fume in the concrete, be favorable to the better hole in the filled concrete to be favorable to improving the compressive strength and the crack resistance of concrete, make the concrete satisfy the requirement of wall body to intensity more easily, make the prefabricated wallboard fastness when receiving the loading force of good making simultaneously higher.
As a further improvement of the invention, the fly ash is class I fly ash.
Through adopting above-mentioned technical scheme, through adopting I level fly ash to mutually support with coarse aggregate and fine aggregate to make in the concrete material piled up more intensive mutually, make the closely knit degree of concrete obtain improving, thereby be favorable to better compressive strength and the crack resistance of reinforced concrete, further can avoid making good prefabricated wallboard crack can not appear.
In conclusion, the invention has the advantages and beneficial effects that:
1. the manufactured prefabricated wallboard can avoid cracks by selecting the modified concrete, so that the compressive strength of the prefabricated wallboard is improved;
2. the dipentaerythritol hexahydroxy stearate is added into the raw materials of the concrete, so that the dipentaerythritol hexahydroxy stearate can act on gaps between the coarse aggregates and the fine aggregates and then interact with cement, the fine aggregates and the coarse aggregates are combined more firmly, and the possibility of cracks of the prefabricated wallboard finally prepared is lower;
3. the addition of the polycarboxylic acid water reducing agent can promote the fluidity of the concrete during solidification, curing and forming, so that the concrete can be more uniform;
4. by adding the glycerol stearate citrate into the raw materials of the concrete, the combined action of the polycarboxylate water reducer and the dipentaerythritol hexahydroxystearate can be promoted, so that the surface activity of the mixed solution of the glycerol stearate citrate, the polycarboxylate water reducer and the dipentaerythritol hexahydroxystearate can be adsorbed on the surfaces of unhydrated cement particles, the solidification speed of the concrete is promoted, the evaporation and the loss of water caused by too slow solidification time of cement paste are prevented, and the strength of the finally prepared prefabricated wallboard is higher;
5. through setting up the mould into the concatenation formula, on the one hand can easy to assemble to according to the demand of actual prefabricated wallboard and the size of adjustment mould, thereby can improve the application scope of mould. On the other hand, can be through the release and the fixed of setting element to positioning gear to can finely tune the distance between two adjacent curb plates, can enlarge the distance between the adjacent curb plate to prefabricated wallboard during the maintenance because the higher emergence of ambient temperature expands, thereby can provide the reserved space for the concrete after the inflation, prevent that the concrete is because the inflation is in the extrusion die.
Drawings
FIG. 1 is a schematic structural view of a mold in example 1 of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1, illustrating the configuration of a kidney-shaped hole;
FIG. 3 is an exploded view of a side panel for illustrating the structure of a mounting groove;
FIG. 4 is a schematic view of the construction of a corner plate to show the construction of a square socket.
Reference numerals: 1. a side plate; 2. a gusset; 3. an end plate; 4. a first bump; 5. a groove; 6. a kidney-shaped hole; 7. positioning the bolt; 8. a fixing member; 81. fixing the bolt; 82. fixing a nut; 9. positioning plates; 10. a rubber pad; 11. inserting holes; 12. a template tube; 13. a blocking plate; 14. installing a pipe; 15. mounting grooves; 16. a limiting sheet; 17. an adjusting tube; 18. a fixing hole; 19. a leak-proof plate; 20. a second bump; 21. a square socket.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1:
a preparation process of a concrete prefabricated wall panel comprises the following steps:
s1: and (4) preparing a mould. Referring to fig. 1, the mold comprises side panels 1, corner panels 2 and end panels 3. The end plate 3 is horizontally placed on the ground, and the angle plate 2 and the side plate 1 are mounted on the end plate 3.
Referring to fig. 2 and 3, the side plate 1 is shaped like a rectangular parallelepiped, and a surface surrounded by the length and width is connected to the end plate 3. A first convex block 4 is integrally arranged on one end face surrounded by the height and the width of the side plate 1, and a groove 5 is formed in the end face at the other end along the length direction of the side plate 1. The first convex block 4 of the previous side plate 1 is inserted into the groove 5 of the next side plate 1. The lateral wall of the groove 5 on the lateral plate 1 is provided with a waist-shaped hole 6 communicated with the groove 5, and the lateral wall of the first convex block 4 facing the waist-shaped hole 6 is provided with a threaded hole. The first bump 4 is fixed in the groove 5 through a positioning piece which is a positioning bolt 7, and the positioning bolt 7 is a butterfly bolt. A positioning bolt 7 penetrates through the kidney-shaped hole 6 from the outer side of the groove 5 to be in threaded connection with a threaded hole of the first bump 4, and a rubber pad 10 is sleeved on the positioning bolt 7; the head of the positioning bolt 7 is tightly pressed against the outer side wall of the side plate 1 through a rubber pad 10.
Referring to fig. 2 and 3, a plugging hole 11 is formed in a portion of the side plate 1, which is located between the first protruding block 4 and the groove 5, the plugging hole 11 penetrates through the side plate 1, and an axis of the plugging hole 11 is parallel to an axis of the positioning bolt 7. The side plate 1 is fixedly provided with a template pipe 12, and the template pipe 12 and the kidney-shaped hole 6 are positioned on the same plane of the side plate 1. The axis of the template pipe 12 coincides with the axis of the plug hole 11, and the inner diameter of the template pipe 12 is equal to the bore diameter of the plug hole 11. The end part of the template pipe 12 far away from the side plate 1 is connected with a blocking plate 13 in a threaded manner, and the outer end wall of the blocking plate 13 far away from the side plate 1 is provided with a starting groove for rotating the blocking plate 13.
Referring to fig. 3, a mounting tube 14 is inserted into the insertion hole 11, and an outer wall of the mounting tube 14 contacts an inner wall of the insertion hole 11. The mounting tube 14 extends through the plug hole 11, and an end of the mounting tube 14 facing the formwork tube 12 is located inside the formwork tube 12. The mounting tube 14 is fixed to the side plate 1 by a fixing member 8. Two mounting grooves 15 have been seted up on the lateral wall that curb plate 1 kept away from template pipe 12, two mounting grooves 15 all communicate with spliced eye 11 to two mounting grooves 15 use the axis of spliced eye 11 as the centre of a circle, are circumference and distribute, and the contained angle between two mounting grooves 15 is the straight angle. The welding has spacing piece 16 on the lateral wall of installation pipe 14, and spacing piece 16 has the same two to spacing piece 16 is pegged graft with mounting groove 15 and is cooperated. The side wall of the limiting sheet 16 far away from the template pipe 12 and the side wall of the side plate 1 far away from the template pipe 12 are in the same plane.
Referring to fig. 3, two adjusting pipes 17 are connected to the mounting pipe 14 in a threaded manner, and the two adjusting pipes 17 are different in size and length. The inner diameter of the adjusting pipe 17 with larger radius is the same as the outer diameter of the adjusting pipe 17 with smaller radius, the outer diameter of the adjusting pipe 17 with larger radius is the same as the inner diameter of the mounting pipe 14, and the adjusting pipe 17 with larger radius is in threaded connection with the inner wall of the mounting pipe 14; the adjustment tube 17 with the smaller radius is screwed into the adjustment tube 17 with the larger radius. The length of the adjusting pipe 17 with the larger radius is smaller than that of the adjusting pipe 17 with the smaller radius, and the mounting pipe 14 is axially overlapped with the two adjusting pipes 17. The end of the adjusting pipe 17 with the smaller radius far away from the mounting groove 15 is positioned in the template pipe 12.
Referring to fig. 2 and 3, the fixing member 8 includes a fixing bolt 81 and a fixing nut 82. The bottom of the mounting groove 15 is provided with a fixing hole 18 along the length direction of the template pipe 12, the fixing hole 18 is a through hole, and the axis of the fixing hole 18 is parallel to the axis of the inserting hole 11. One end of the fixing bolt 81 is fixedly connected with the side wall of the limiting piece 16 facing the template pipe 12, and the other end of the fixing bolt passes through the fixing hole 18 and is positioned outside the side wall of the side plate 1 connected with the template pipe 12. The fixing nut 82 is screwed on the fixing bolt 81, and the fixing nut 82 is tightly abutted against the side wall of the formwork tube 12 connected with the side plate 1.
Referring to fig. 3, a leakage-proof plate 19 is fixedly arranged on the side wall of the side plate 1 far away from the waist-shaped hole 6, and the height of the leakage-proof plate 19 is equal to that of the side plate 1. The side of the side wall of the leakage-proof plate 19 facing the side plate 1 is fixedly connected with one side of the side plate 1 far away from the first convex block 4, the other side is positioned on one side of the adjacent side plate 1 near the first convex block 4, and the leakage-proof plate 19 is connected with the adjacent side plate 1 near the first convex block 4 in a sliding manner.
Referring to fig. 2 and 4, the corner plate 2 has a rectangular parallelepiped shape, and a face surrounded by the length and width is connected to the end plate 3. A second lug 20 is integrally arranged on one end face enclosed by the height and the width of the angle plate 2, and a square socket 21 for the insertion of the first lug 4 on the side plate 1 is arranged at the other end. The opening direction of the square insertion opening 21 coincides with the width direction of the gusset 2. The gusset 2 is provided at a position between the second projection 20 and the square socket 21 in the same manner as the first projection 4 and the groove 5 of the gusset 2, and is provided with the mounting tube 14, the template tube 12 and the adjusting tube 17 in the same manner, the same connecting position and the same connecting direction. The side wall of the angle plate 2 is fixedly connected with a positioning piece 9, and the positioning piece 9 and the template pipe 12 are in the same plane. The first convex block 4 of the side plate 1 penetrates through the square socket 21, a through hole is formed in the projection position of the threaded hole in the first convex block 4 on the positioning plate 9, the rod part of the positioning bolt 7 penetrates through the through hole in the positioning plate 9 to be in threaded connection with the first convex block 4, and the head part of the positioning bolt 7 is abutted against the positioning plate 9. The second projection 20 of the angle plate 2 is provided with a threaded hole, and the threaded hole is also in threaded connection with a positioning bolt 7. The second convex block 20 of the angle plate 2 is inserted into the groove 5 of the adjacent side plate 1, the positioning bolt 7 passes through the waist-shaped hole 6 of the adjacent side plate 1 to be in threaded connection with the threaded hole on the second convex block 20, and the head of the positioning bolt 7 on the second convex block 20 is tightly abutted against the outer side wall of the adjacent side plate 1 through the rubber pad 10.
The side wall of the corner plate 2 far away from the mounting pipe 14 is also fixedly provided with a leakage-proof plate 19, and the height of the leakage-proof plate 19 is equal to that of the corner plate 2. The side of the side wall of the leakage-proof plate 19 facing the angle plate 2 is fixedly connected with the side of the angle plate 2 far away from the square socket 21, the other side is positioned on the side plate 1 connected on the second projection 20, and the leakage-proof plate 19 is connected with the adjacent side plate 1 close to the second projection 20 in a sliding way.
The staff is earlier with the end plate 3 tiling subaerial, then install two regulating tubes 17 in the installation pipe 14 on the scute 2 in the installation pipe 14, then insert from the spliced eye 11 of scute 2 the one end that keeps away from spacing piece 16 with installation pipe 14 for the installation pipe 14 is kept away from the one end of spacing piece 16 and is inserted to template pipe 12 in, makes spacing piece 16 peg graft in mounting groove 15 simultaneously. Meanwhile, the fixing bolt 81 passes through the fixing hole 18 in the mounting groove 15, and the fixing bolt 81 is in threaded connection with the fixing nut 82, so that the fixing nut 82 is tightly abutted against the side wall of the angle plate 2 containing the formwork tube 12.
Next, two adjusting pipes 17 in the installation pipe 14 on the side plate 1 are installed in the installation pipe 14, then one end of the installation pipe 14, which is far away from the limiting piece 16, is inserted from the insertion hole 11 of the side plate 1, so that one end of the installation pipe 14, which is far away from the limiting piece 16, is inserted into the formwork pipe 12, and meanwhile, the limiting piece 16 is inserted into the installation groove 15, meanwhile, the fixing bolt 81 penetrates out from the fixing hole 18 in the installation groove 15, the fixing bolt 81 is in threaded connection with the fixing nut 82, so that the fixing nut 82 is abutted against the side wall of the side plate 1, which contains the formwork pipe 12.
Then, the second convex block 20 of the angle plate 2 is inserted into the groove 5 of the side plate 1, then the positioning bolt 7 penetrates through the waist-shaped hole 6 on the side plate 1, and meanwhile, the rubber gasket 10 is sleeved at the screw rod part of the positioning bolt 7, so that the positioning bolt 7 is in threaded connection with the second convex block 20, and the head part of the positioning bolt 7 is tightly abutted against the outer side wall of the side plate 1 through the rubber gasket 10 by continuous screwing.
Then, the first convex block 4 of the side plate 1 on the side of the angle plate 2 far away from the second convex block 20 is inserted into the square insertion opening 21 of the angle plate 2, the threaded hole on the first convex block 4 is overlapped with the through hole on the positioning sheet 9, then the positioning bolt 7 is firstly sleeved with the rubber pad 10, then penetrates through the through hole on the positioning sheet 9 and is in threaded connection with the first convex block 4, and meanwhile, the head of the positioning bolt 7 is tightly abutted to the positioning sheet 9 through the rubber pad 10. So far, the two ends of the angle plate 2 are respectively connected with the two side plates 1.
Then, the first convex block 4 at one end of the side plate 1 far away from the second convex block 20 is inserted into the groove 5 of the adjacent side plate 1, then the positioning bolt 7 is sleeved with the rubber pad 10 and then penetrates through the waist-shaped hole 6 on the adjacent side plate 1 to be in threaded connection with the first convex block 4, so that the head of the positioning bolt 7 is tightly abutted against the outer side wall of the adjacent side plate 1 through the rubber pad 10. In the same way, the side plates 1 are connected two by two, and at the corners, the two adjacent side plates 1 are connected through the angle plates 2, and finally the mold is combined into a rectangular mold frame, and simultaneously the head of the positioning bolt 7 and the mold plate pipe 12 are positioned at the outer side of the mold frame, and the leak-proof plate 19 is positioned at the inner side of the mold frame. The mounted mold frame is then bolted to the end plate 3.
Move positioning bolt 7 through twisting, make positioning bolt 7 break away from with the outer wall of adjacent curb plate 1, then the staff slides in the waist type hole 6 of adjacent curb plate 1 through ordering about positioning bolt 7 so that positioning bolt 7, then drive first lug 4 and slide in the recess 5 of adjacent curb plate 1, thereby change the distance between two adjacent curb plates 1, change along with the distance between two adjacent curb plates 1, thereby make to produce the clearance between two adjacent curb plates 1, but curb plate 1 is provided with leak protection board 19 towards the fixed on the inner wall of mould frame, leak protection board 19 blocks up the clearance between two adjacent curb plates 1, thereby prevent that the concrete from spilling from the clearance.
S2: and (5) installing the steel bars. The worker unscrews the blocking plates 13 on the formwork tube 12 installed at S1 from the formwork tube 12, then inserts the reinforcing bars from the open end of the formwork tube 12 far from the side plate 1 so that the reinforcing bars pass through the adjusting tubes 17 with smaller radius at the other side, and then unscrews the blocking plates 13 at both ends of the reinforcing bars onto the formwork tube 12, respectively, thereby preventing the concrete from leaking out of the adjusting tubes 17 and the installation tubes 14 during the construction process. In this way, the entire rebar is installed within the mold frame.
S3: and (5) pouring concrete. The concrete comprises, by weight, 210 parts of cement, 590 parts of coarse aggregate, 125 parts of fine aggregate, 365 parts of fly ash, 10 parts of calcium lignosulfonate, 70 parts of water, 30 parts of fatty alcohol-polyoxyethylene ether, 25 parts of acrylamide graft copolymer starch, 21 parts of dipentaerythritol hexahydroxystearate, 3 parts of polycarboxylic acid water reducer, 4 parts of glycerol stearate citrate and 3 parts of micro silicon powder.
The worker stirs the mixture at a speed of 200r/min in a 150L stirring kettle at normal temperature, and adds the raw materials of the concrete while stirring, wherein the cement is portland cement. And stirring and mixing uniformly to obtain the concrete.
The resulting concrete is then poured into the mould frame through S2 where the reinforcement is installed
S4: and (5) vibrating and maintaining. And (5) uniformly vibrating the concrete in the mould frame after the pouring of the concrete in the S3 by using a vibrator. And then covering the concrete in the mold frame with a plastic film, and spraying water on the plastic film to keep the plastic film wet all the time, and simultaneously, controlling the curing temperature to be 25 ℃ and the curing time to be 15 days to preliminarily form the concrete.
S5: and (5) disassembling the mould. After the process of S4, the worker first twists the positioning bolts 7 on the four corner plates 2 to disengage the positioning bolts 7 from the first protrusions 4 and the positioning pieces 9, and then pulls the corner plate 2 to disengage the side plate 1 from the square insertion opening 21 on the corner plate 2. Next, the bolts between the side panel 1 and the gusset 2 and the end panel 3 are removed, and then the gusset 2 and the side panel 1 connected to each other are pulled in a direction out of the mold frame, whereby the gusset 2 and the side panel 1 can be removed from the end panel 3.
S6: and (5) maintaining continuously. And then carrying out spray water treatment on the concrete wall body treated by the S5, spraying once every 8 hours for 3 days, and keeping the temperature of the surface of the concrete wall body to be 25 ℃ all the time.
And (5) after continuous curing of S6, preparing the concrete prefabricated wall panel.
The difference between the embodiment 2 and the embodiment 1 is that the raw materials of the concrete comprise, by weight, 210 parts of cement, 590 parts of coarse aggregate, 125 parts of fine aggregate, 365 parts of fly ash, 10 parts of calcium lignosulfonate, 70 parts of water, 30 parts of fatty alcohol-polyoxyethylene ether, 25 parts of acrylamide graft copolymer starch and 3 parts of silica fume; the fly ash is I-grade fly ash.
The difference between the embodiment 3 and the embodiment 1 is that the raw materials of the concrete comprise, by weight, 210 parts of cement, 590 parts of coarse aggregate, 125 parts of fine aggregate, 365 parts of fly ash, 10 parts of calcium lignosulfonate, 70 parts of water, 30 parts of fatty alcohol-polyoxyethylene ether, 25 parts of acrylamide graft copolymer starch, 21 parts of dipentaerythritol hexahydroxystearate, 3 parts of polycarboxylic acid water reducer and 4 parts of glycerol stearate citrate.
Example 4 differs from example 1 in that the raw materials of the concrete include, by weight, 210 parts of cement, 590 parts of coarse aggregate, 125 parts of fine aggregate, 365 parts of fly ash, 10 parts of calcium lignosulfonate, 70 parts of water, 30 parts of fatty alcohol-polyoxyethylene ether, 25 parts of acrylamide graft copolymer starch, 21 parts of dipentaerythritol hexahydroxystearate and 3 parts of silica fume.
The difference between the embodiment 5 and the embodiment 1 is that the raw materials of the concrete comprise, by weight, 210 parts of cement, 590 parts of coarse aggregate, 125 parts of fine aggregate, 365 parts of fly ash, 10 parts of calcium lignosulfonate, 70 parts of water, 30 parts of fatty alcohol-polyoxyethylene ether, 25 parts of acrylamide graft copolymer starch, 21 parts of dipentaerythritol hexahydroxystearate, 3 parts of polycarboxylic acid water reducer and 3 parts of silica fume.
Examples 6 to 9 differ from example 1 in that the raw materials of the concrete are shown in table 1 in parts by weight: unit: portions are
TABLE 1
Comparative example 1 is different from example 1 in that the used weight part of coarse aggregate in the raw material of concrete is 500 parts.
Comparative example 2 differs from example 1 in that the concrete raw material is free of calcium lignosulfonate.
Comparative example 3 is different from example 1 in that the fine aggregate is used in an amount of 160 parts by weight in the raw material for concrete.
Comparative example 4 is different from example 1 in that the raw material of concrete is free of fatty alcohol polyoxyethylene ether.
Comparative example 5 is different from example 1 in that the raw material of concrete is free of acrylamide graft-copolymerized starch.
Comparative example 6 differs from example 1 in that the concrete raw material is free of polycarboxylic acid water reducing agent.
Comparative example 7 differs from example 1 in that the starting material for the concrete is free of dipentaerythritol hexahydroxystearate.
Test one:
prefabricated wall panels having a size of 0.5m by 1m by 0.25 were prepared using the manufacturing processes described in examples 1 to 9 and comparative examples 1 to 7, and pressure was applied to the test using a press machine to detect the pressure applied when the test specimens cracked; and the applied pressures at the time of cracking of the prefabricated wallboards prepared by the preparation processes of examples 6 to 9 were averaged and recorded as example flat, and then the applied pressures of examples 1 to 5, comparative examples 1 to 7 and the applied pressures corresponding to example flat were recorded in table 2 in units of: KN.
And (2) test II:
the prefabricated wall panels prepared in examples 1 to 9 and comparative examples 1 to 7 were tested for 28d compressive strength (MPa) according to the compressive strength test in GB/T50081-2002 "standard for testing mechanical properties of ordinary concrete", and the average values of examples 1 to 5, examples 6 to 9 and the 28d compressive strength of comparative examples 1 to 7 were recorded in table 2, and examples 6 to 9 were recorded as example levels, in units of: MPa.
TABLE 2
| Pressure applied during cracking of the test specimen | 28d compressive strength | |
| Example 1 | 3349 | 37.2 |
| Example 2 | 3122 | 22.1 |
| Example 3 | 3203 | 23.8 |
| Example 4 | 3134 | 25.4 |
| Example 5 | 3173 | 26.3 |
| Examples (II) | 3346 | 36.7 |
| Comparative example 1 | 3245 | 24.2 |
| Comparative example 2 | 3103 | 20.3 |
| Comparative example 3 | 3132 | 21.8 |
| Comparative example 4 | 3116 | 20.8 |
| Comparative example 5 | 3114 | 21.3 |
| Comparative example 6 | 3172 | 20.3 |
| Comparative example 7 | 3135 | 23.3 |
As can be seen from table 2, since dipentaerythritol hexahydroxystearate, polycarboxylic acid water reducer, glyceryl stearate citrate, and microsilica were not present in example 2, the strength of the finally prepared prefabricated wallboard was significantly reduced, and cracks were more likely to occur.
As can be seen from table 2, since no silica fume is added in example 3, the pressure required for cracking is increased and the strength is slightly increased compared to example 2, which indicates that the pressure required for cracking the prefabricated wallboard can be increased due to the addition of dipentaerythritol hexahydroxystearate, the polycarboxylic acid water reducing agent and the glycerol stearate citrate.
As can be seen from table 2, the strength of the prefabricated wallboard prepared by the preparation process described in example 1 of the present disclosure is the highest, and the force required to be applied during cracking is the largest, so that the prefabricated wallboard prepared by the preparation process described in example 1 has stronger durability, is least prone to cracking, and has the highest compressive strength.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (5)
1. A preparation technology of a concrete prefabricated wallboard is characterized by comprising the following steps: the method comprises the following steps:
s1: preparing a mould;
s2: installing steel bars; installing reinforcing steel bars in the die after the preparation of the S1 die;
s3: pouring concrete; pouring concrete towards the interior of the mould after the treatment of S2; the concrete comprises the following raw materials in parts by weight: 180-240 parts of cement, 550-630 parts of coarse aggregate, 100-150 parts of fine aggregate, 300-430 parts of fly ash, 6-15 parts of calcium lignosulfonate, 60-80 parts of water, 20-40 parts of fatty alcohol-polyoxyethylene ether, 13-37 parts of acrylamide graft copolymer starch, 13-30 parts of dipentaerythritol hexahydroxystearate, 1-4 parts of polycarboxylic acid water reducer, 2-7 parts of glycerol stearate citrate and 2-5 parts of silica fume;
s4: vibrating and maintaining; vibrating the concrete poured in the S3 and curing and forming;
s5: disassembling the mould; disassembling the mold after the processing of S4;
s6: maintaining continuously; continuously curing the concrete subjected to the disassembly in the step S5;
and (5) after continuous curing of S6, preparing the concrete prefabricated wall panel.
2. The process for preparing a concrete prefabricated wall panel according to claim 1, wherein: preparing the S1 mold, wherein the mold comprises a side plate (1), an angle plate (2) and an end plate (3), and two opposite sides of the side plate (1) are respectively provided with a groove (5) and a first bump (4); the first convex block (4) is inserted into the groove (5) of the adjacent side plate (1) and is connected with the groove (5) in a sliding manner; and a positioning piece for releasing and fixing the first bump (4) is arranged on the outer side wall of the side plate (1) close to the groove (5).
3. The process for preparing a concrete prefabricated wall panel according to claim 2, wherein: the side plate (1) is provided with a waist-shaped hole (6) communicated with the groove (5) along the length direction of the side plate, and the positioning piece is a positioning bolt (7) in threaded connection with the first bump (4); the rod part of the positioning bolt (7) penetrates through the waist-shaped hole (6), and the head part of the positioning bolt (7) far away from the first bump (4) is tightly abutted to the outer side wall of the side plate (1).
4. The process for preparing a concrete prefabricated wall panel according to claim 3, wherein: the side plate (1) is provided with a plug hole (11) along the length direction, and the side plate (1) is provided with a template pipe (12) which is coaxial with the plug hole (11) and is used for plugging the plug hole (11); the template pipe (12) is communicated with the plug hole (11), and a blocking plate (13) used for blocking the template pipe (12) is detachably arranged at the end part, far away from the side plate (1), of the template pipe (12); the side wall of the side plate (1) far away from the template pipe (12) is provided with a leakage-proof plate (19); one end of the anti-leakage plate (19) is connected to one side of the side plate (1) close to the first bump (4), and the side wall of the other end of the anti-leakage plate is abutted against the side wall of the adjacent side plate (1) far away from the template pipe (12); the height of the anti-leakage plate (19) in the vertical direction is consistent with that of the side plate (1).
5. The process for preparing a concrete prefabricated wall panel according to claim 1, wherein: the fly ash is I-grade fly ash.
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