CN110878600A - Desulfurized gypsum based composite light wallboard and splicing method thereof - Google Patents
Desulfurized gypsum based composite light wallboard and splicing method thereof Download PDFInfo
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- CN110878600A CN110878600A CN201911178700.9A CN201911178700A CN110878600A CN 110878600 A CN110878600 A CN 110878600A CN 201911178700 A CN201911178700 A CN 201911178700A CN 110878600 A CN110878600 A CN 110878600A
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- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 78
- 239000010440 gypsum Substances 0.000 title claims abstract description 78
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 39
- 239000004033 plastic Substances 0.000 claims abstract description 24
- 229920006389 polyphenyl polymer Polymers 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 4
- 230000023556 desulfurization Effects 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims abstract description 3
- 239000008187 granular material Substances 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 239000000843 powder Substances 0.000 claims description 16
- 239000002344 surface layer Substances 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 12
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 11
- 239000010410 layer Substances 0.000 claims description 11
- 239000011707 mineral Substances 0.000 claims description 11
- 239000004568 cement Substances 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 239000010881 fly ash Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 229920000609 methyl cellulose Polymers 0.000 claims description 6
- 239000001923 methylcellulose Substances 0.000 claims description 6
- 229920006327 polystyrene foam Polymers 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000012856 packing Methods 0.000 abstract description 2
- 239000011440 grout Substances 0.000 abstract 1
- 235000010755 mineral Nutrition 0.000 description 8
- 238000005192 partition Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 4
- 235000010981 methylcellulose Nutrition 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 206010016807 Fluid retention Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
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Classifications
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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
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/7401—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using panels without a frame or supporting posts, with or without upper or lower edge locating rails
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/88—Insulating elements for both heat and sound
- E04B1/90—Insulating elements for both heat and sound slab-shaped
-
- 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
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/7401—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using panels without a frame or supporting posts, with or without upper or lower edge locating rails
- E04B2/7403—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using panels without a frame or supporting posts, with or without upper or lower edge locating rails with special measures for sound or thermal insulation including fire protection
-
- 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
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/82—Removable non-load-bearing partitions; Partitions with a free upper edge characterised by the manner in which edges are connected to the building; Means therefor; Special details of easily-removable partitions as far as related to the connection with other parts of the building
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
- Mechanical Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Panels For Use In Building Construction (AREA)
Abstract
A desulfurized gypsum based composite light wallboard and a splicing method thereof belong to the technical field of wallboards. This compound light wallboard of desulfurization gypsum base is sandwich structure, and two surface courses are the surface course that excels in of interior surperficial area protruding rib, and the sandwich layer is polyphenyl granule gypsum mixture light weight layer. One side of the wall plate is provided with a raised vertical edge, the other side is provided with a groove, and the depth of the groove is greater than the raised length of the vertical edge. When carrying out the concatenation of wallboard, the seam crossing of adjacent wallboard can form a vertical space that link up, opens a horizontal aperture and leads to the wallboard surface in the bottom position in each vertical space that link up, gets open plastic hose and inserts wherein, then pours into the grout material into, utilizes the U-shaped pipe principle can realize the closely knit packing to each vertical space that link up, reaches good concatenation effect. The invention can give consideration to the performances of thermal insulation, sound insulation and the like and the mechanical properties of the wallboard, and has the outstanding advantages of crack resistance, light weight, environmental protection and economy.
Description
Technical Field
The invention relates to the technology in the field of inner partition boards, in particular to a desulfurized gypsum based composite light wallboard and a splicing method thereof.
Background
The composite wallboard is an important type of partition wall in the building, because the pure light material can meet the functional requirements of light weight, heat preservation, heat insulation, sound insulation and the like, but the mechanical properties of bending resistance bearing capacity, hanging capacity, impact resistance and the like are difficult to reach the standard, and the high-strength material is excellent in mechanical properties but the functional requirements of heat preservation, heat insulation, sound insulation and the like are difficult to realize. Therefore, the overall requirements are considered, high-strength materials can be adopted on the two surface layers of the wallboard, and light materials are adopted on the core layer.
The wallboard type proposed by ' a light weight composite thermal insulation wallboard and a preparation method thereof ' (CN 109678410A) ' belongs to the category. But as one of the most important raw materials, namely the cementing material, the technology adopts cement, and as the 'green building' is continuously promoted, gypsum has more and more outstanding advantages as the cementing material of the non-load-bearing member. For example, "a gypsum-based composite material for lightweight partition wall board (CN 108863265A)" uses building gypsum as a main cementitious material, and also uses a part of cement and quicklime.
The desulfurized gypsum is one of the important types of gypsum, has the advantage of waste utilization compared with natural gypsum, and has more environmental protection value. "a toughened light partition board and its preparation method (CN 107226660A)", "a modified gypsum-based light partition board preparation method (CN 108585724A)", "a gypsum foamed heat-insulating composite wallboard (CN 106242468A)", "a method for preparing light partition board by using desulfurized gypsum (CN 104496516A)", etc., and the desulfurized gypsum is partially or totally adopted as a cementing material. However, these techniques are not the structure of composite wall board, generally focus on the properties of light weight, heat insulation, sound insulation and the like, and are not ideal in mechanical properties. The gypsum-based solid material in the technical schemes of ' flue gas desulfurization gypsum light partition board (CN 202969712U) ' a gypsum hollow partition board and a production process thereof (CN 105254267A) ' has high strength design and good mechanical property, but in order to reduce the total weight of the wallboard and improve the sound insulation performance, a hollow design is adopted, the design is difficult to adapt to the daily use requirements of a plurality of owners at present, and the market acceptance is limited.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a desulfurized gypsum-based composite light wallboard which takes semi-hydrated desulfurized gypsum as a main cementing material, adopts a composite structure, has balanced mechanical properties and service performance and has outstanding comprehensive benefits, and designs a corresponding splicing method.
This compound light wallboard of desulfurization gypsum base is sandwich structure, and two surface courses are the surface course that excels in of the protruding rib of inner surface area, and the sandwich layer is the mixed light layer of polyphenyl granule gypsum, and there is bellied perpendicular arris wallboard length direction's a side, and perpendicular arris width 30mm ~40mm, protruding length is 20mm ~30mm, and another side is fluted, and the inside width of recess equals with perpendicular arris width, and the recess depth is 30mm ~40mm bigger than the protruding length of perpendicular arris.
The high-strength surface layer is 10 mm-15 mm thick, ribs protruding towards the interior of the wallboard are arranged near two three-point positions of the width direction size, the rib width is 20 mm-30 mm, and the protruding height is 30 mm-40 mm. The surface layer is formed by stirring and hardening semi-hydrated desulfurized gypsum, white cement, mineral powder, polycarboxylic acid water reducing agent, gypsum retarder and water, and the surface layer comprises the following components in percentage by mass: 50-58% of semi-water desulfurized gypsum, 4-8% of white cement, 10-15% of mineral powder, 1-3% of polycarboxylic acid water reducing agent and 16-35% of water.
The polystyrene particle gypsum mixed lightweight layer is obtained by uniformly mixing slurry obtained by stirring semi-hydrated desulfurized gypsum, fly ash, methylcellulose, a gypsum retarder and water with polystyrene foam particles and then jointly hardening, the mass ratio of the semi-hydrated desulfurized gypsum to the fly ash is 2:1, the mass of the methylcellulose, the gypsum retarder and the water is respectively 1-2%, 1-5% and 50-65% of the sum of the mass of the semi-hydrated desulfurized gypsum and the mass of the fly ash, and the doping volume of the polystyrene foam particles is 1.5-4 times of the volume of the slurry calculated according to the stacking volume.
The invention also provides a splicing method of the desulfurized gypsum based composite light wallboard, which mainly comprises the following steps: firstly, placing the desulfurized gypsum-based composite light wallboard in a dry and ventilated environment for more than 20 days to complete most of drying shrinkage of the wallboard; secondly, positioning and fixing each wallboard at a preset engineering position, inserting the raised vertical edge on the side surface of each wallboard into the groove on the side surface of the adjacent wallboard, and forming a vertical through space with the length and the width of 30-40 mm outside the end part of the vertical edge and in the groove because the depth of the groove is 30-40 mm larger than the raised length of the vertical edge; thirdly, forming a horizontal small hole at the bottom of each vertical through space, leading the horizontal small hole to the outer surface of the wall board, then taking an open plastic hose with the length slightly larger than the height of the wall board, inserting one end of the open plastic hose into the horizontal small hole, erecting the other end of the open plastic hose, and enabling the top of the open plastic hose to be flush with the top of the wall board, so that the vertical through spaces and the open plastic hose jointly form a U-shaped pipe; fourthly, continuously injecting grouting material downwards from the top opening of each plastic hose, enabling the grouting material to enter the vertical through space after reaching the horizontal small hole and start to continuously rise according to the principle of a U-shaped pipe, and stopping injecting the grouting material when reaching the top of the wallboard, so that the vertical through spaces are densely filled, and splicing of adjacent wallboards is completed; fifthly, after the grouting material is solidified and hardened, the horizontal small holes formed in the bottom of the wallboard are naturally sealed by the solidified grouting material, and finally the plastic hoses are removed.
The grouting material comprises the components of semi-water desulfurized gypsum, mineral powder, rubber powder and water. The mass ratio of each component is as follows: 50-55% of semi-water desulfurized gypsum, 10-15% of mineral powder, 1-5% of rubber powder and 25-39% of water.
The main mechanical property characteristics of the composite light wallboard are as follows: (1) by controlling the water-glue ratio to be below 0.3 and adding a small amount of white cement, the high strength of the high-strength surface layer is ensured, and the good compressive strength, hanging resistance, impact resistance, bending resistance and bearing capacity and the like of the whole wallboard can be realized; (2) the high-strength surface layer has larger bending rigidity in a limited volume through ribbing, so that the operation in the construction process is facilitated, and the bending rigidity of the whole wallboard can be ensured.
The main beneficial effects of the invention also include: (1) a large amount of industrial waste materials such as desulfurized gypsum, mineral powder and the like are utilized, and the environmental protection benefit is remarkable; (2) the surface layer is light in color, has good decorative effect, and can not be painted with wall paint under many conditions; (3) the polystyrene particle gypsum mixed light layer can reduce the volume weight of the wallboard and enhance the performances of heat preservation, heat insulation, sound insulation and the like; (4) the methyl cellulose can improve the water retention of the slurry in the construction process, has a certain air entraining effect, and can further reduce the weight of the wallboard; (5) splicing is carried out after the dry shrinkage of the wallboard is basically finished, so that the dry shrinkage cracks of the wallboard can be prevented from occurring in the future use process; (6) the grouting mode based on the U-shaped pipe principle is simple, convenient and effective; (7) the grouting material is a gypsum-based material, has a micro-expansion characteristic, can realize a better filling connection effect, and meanwhile, the rubber powder can further enhance the cohesiveness between the grouting material and the wallboard and enhance the crack resistance of a splicing part; (8) the gypsum-based grouting material has short hardening time which is generally not more than 10 minutes, so that the splicing process of each adjacent wallboard is quick and efficient.
Drawings
FIG. 1 is a schematic view of a high-strength surface layer of the desulfurized gypsum based composite light wallboard.
FIG. 2 is a schematic cross-sectional view of the mold for the desulfurized gypsum based composite light wallboard.
FIG. 3 is a schematic cross-sectional view of the desulfurized gypsum based composite lightweight wallboard.
Fig. 4 is a schematic diagram of two adjacent desulfurized gypsum based composite lightweight wallboards after splicing (before filling with grouting material).
Figure 5 is a schematic view of the bottom of the wall panel being perforated and connected to a plastic hose ready for grouting.
Figure 6 is a schematic illustration of adjacent panels being spliced with a grouting material.
In the figure, 1 is a high-strength surface layer; 2 is a convex rib of the surface layer; 3 is a large flat plate of the wallboard mould; 4, forming a wallboard mould side panel of the wallboard side groove; 5 is a wallboard mould side panel for forming the rib on the side surface of the wallboard; 6 is a polyphenyl particle gypsum mixed light layer; 7 is a desulfurized gypsum based composite light wallboard; 8 is a raised vertical edge on the side surface of the wallboard; 9 is a groove on the other side surface of the wallboard; 10 is a vertical through space in the groove; 11 is a horizontal small hole at the bottom of the wallboard; 12 is an open plastic hose; 13 is grouting material.
Detailed Description
The following examples illustrate the invention in detail: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a process are given, but the scope of the present invention is not limited to the following embodiments.
Firstly, calculating the weight of each component material required by the high-strength surface layer 1 according to the preset yield, wherein the weight comprises semi-water desulfurized gypsum, white cement, mineral powder, polycarboxylic acid water reducing agent, gypsum retarder and water. The mass ratio of each component is as follows: 50-58% of semi-water desulfurized gypsum, 4-8% of white cement, 10-15% of mineral powder, 1-3% of polycarboxylic acid water reducing agent and 16-35% of water. After weighing, uniformly stirring all the components to form slurry, injecting the slurry into a corresponding mold, and hardening to form a high-strength surface layer 1 which is 10-15 mm thick and provided with ribs 2 (20-30 mm in width and 30-40 mm in protruding height) protruding out of a side plane at three points of the width direction.
A wallboard mold is processed, which consists of four plates: two large plates 3; two side panels. The length of four boards all equals the length of wallboard, and the width of two big dull and stereotyped 3 is the width of wallboard, and parallel placement is the thickness of wallboard thickness plus two high strength surface course 1 to the interval. One side panel 4 protrudes towards the interior of the wallboard, the width of the protrusion is 30 mm-40 mm, the height of the protrusion is 50 mm-70 mm, and the protrusion corresponds to a groove part of one side surface of the wallboard; the other side panel 5 protrudes towards the outside of the wallboard, the width of the protrusion ranges from 30mm to 40mm, the height of the protrusion ranges from 20mm to 30mm, and the protrusion corresponds to the vertical edge part of the other side of the wallboard. The two high-strength facing layers 1 are placed in a mould with the ribbed 2 side facing the inside of the mould.
Then weighing 60-70% of semi-hydrated desulfurized gypsum and 30-40% of fly ash by mass percent, uniformly mixing, adding 1-2% of methylcellulose, 1-5% of gypsum retarder and 50-65% of water by mass of the total mass of the mixture, stirring, adding polystyrene foam particles in the stirring process, and uniformly mixing. The mixing volume of the polystyrene foam particles is 1.5-4 times of the volume of the slurry according to the stacking volume.
Then the mixture is injected into the space between the two high-strength surface layers 1 and the side panels 4 and 5 in the mould and vibrated, after hardening, a polyphenyl particle gypsum mixed light weight layer 6 is formed, and the polyphenyl particle gypsum mixed light weight layer and the two high-strength surface layers 1 are combined to form the desulfurized gypsum based composite light weight wallboard 7.
From the finished product, one side of the desulfurized gypsum based composite light wallboard 7 is provided with a raised vertical edge 8, the other side is provided with a groove 9, the internal width of the groove 9 is equal to the width of the vertical edge 8 and is generally 30 mm-40 mm, but the depth of the groove 9 is 30 mm-40 mm larger than the raised length of the vertical edge 8.
The finished product of the desulfurized gypsum-based composite light wallboard 7 is placed for more than 20 days in a dry and ventilated environment, and wall construction can be carried out only after most of drying and shrinkage are finished. A desulfurized gypsum based composite light wall board 7 is erected at a preset engineering position, and the top and the bottom are respectively fixed with a floor structure. Then an adjacent desulfurized gypsum based composite light wall board 7 is put in place, and the raised vertical edge 8 on the side surface of the previous wall board is inserted into the groove 9 on the side surface of the adjacent wall board. Because the depth of the groove 9 is 30 mm-40 mm greater than the length of the vertical rib 8, a vertical through space 10 with the length and width of 30 mm-40 mm is formed outside the end part of the vertical rib 8 and inside the groove 9.
A horizontal small hole 11 is formed in the bottom of each vertical through space 10 and communicated with the outer surface of the wall plate 7, then an open plastic hose 12 with the length slightly larger than the height of the wall plate 7 is taken, one end of the open plastic hose is inserted into the horizontal small hole 11, the other end of the open plastic hose is erected, and the top of the open plastic hose is flush with the top of the wall plate 7. Thus, the vertical through space and the open plastic hose jointly form a U-shaped pipe.
And then weighing the materials according to the mass ratio of 50-55% of semi-water desulfurized gypsum, 10-15% of mineral powder, 1-5% of rubber powder and 25-39% of water, and quickly and uniformly stirring to obtain the grouting material 13. With grouting material 13 constantly pouring into downwards from the top opening part of each plastic hose 12, according to the U-shaped pipe principle, grouting material 13 will enter each vertical through space 10 after reaching horizontal aperture 11 to begin constantly rising, stop pouring into grouting material when it reaches the top of wallboard 7, realized closely knit the packing to each vertical through space 10.
As the cementing material is semi-hydrated desulfurized gypsum, the grouting material 13 can be quickly solidified and hardened, and the horizontal small holes 11 at the bottom of the wallboard 7 are naturally sealed by the solidified grouting material 13. And then the plastic hoses 12 are removed, so that the effective splicing among the desulfurized gypsum based composite light wall boards 7 is realized.
Claims (5)
1. The utility model provides a compound light wallboard of desulfurization gypsum base, its characterized in that, for sandwich structure, two surface courses are the surface course that excels in of the protruding rib of inner surface area, the sandwich layer is polyphenyl granule gypsum mixture light layer, there is bellied perpendicular arris wallboard length direction's a side, perpendicular arris width 30mm ~40mm, protruding length is 20mm ~30mm, another side is fluted, the inside width of recess equals with perpendicular arris width, the recess depth is 30mm ~40mm bigger than the protruding length of perpendicular arris.
2. The desulfurized gypsum based composite light wallboard of claim 1, wherein the high-strength surface layer is 10mm to 15mm thick, ribs protruding towards the interior of the wallboard are respectively arranged near two thirds of the width direction, the width of each rib is 20mm to 30mm, the height of each protrusion is 30mm to 40mm, the surface layer is formed by stirring and hardening semi-water desulfurized gypsum, white cement, mineral powder, polycarboxylic acid water reducing agent, gypsum retarder and water, and the mass ratio of each component is as follows: 50-58% of semi-water desulfurized gypsum, 4-8% of white cement, 10-15% of mineral powder, 1-3% of polycarboxylic acid water reducing agent and 16-35% of water.
3. The desulfurized gypsum based composite light wallboard of claim 1, wherein the polystyrene particle gypsum mixed light layer is obtained by uniformly mixing slurry obtained by stirring semi-hydrated desulfurized gypsum, fly ash, methylcellulose, a gypsum retarder and water with polystyrene foam particles and then jointly hardening the mixture, the mass ratio of the semi-hydrated desulfurized gypsum to the fly ash is 2:1, the mass of the methylcellulose, the gypsum retarder and the water is respectively 1-2%, 1-5% and 50-65% of the sum of the mass of the semi-hydrated desulfurized gypsum and the fly ash, and the doping volume of the polystyrene foam particles is 1.5-4 times of the slurry volume calculated by the stacking volume.
4. A splicing method of a desulfurized gypsum based composite light wallboard is characterized by mainly comprising the following steps: firstly, placing the desulfurized gypsum-based composite light wallboard in a dry and ventilated environment for more than 20 days to complete most of drying shrinkage of the wallboard; secondly, positioning and fixing each wallboard at a preset engineering position, inserting the raised vertical edge on the side surface of each wallboard into the groove on the side surface of the adjacent wallboard, and forming a vertical through space with the length and the width of 30-40 mm outside the end part of the vertical edge and in the groove because the depth of the groove is 30-40 mm larger than the raised length of the vertical edge; thirdly, forming a horizontal small hole at the bottom of each vertical through space, leading the horizontal small hole to the outer surface of the wall board, then taking an open plastic hose with the length slightly larger than the height of the wall board, inserting one end of the open plastic hose into the horizontal small hole, erecting the other end of the open plastic hose, and enabling the top of the open plastic hose to be flush with the top of the wall board, so that the vertical through spaces and the open plastic hose jointly form a U-shaped pipe; fourthly, continuously injecting grouting material downwards from the top opening of each plastic hose, enabling the grouting material to enter the vertical through space after reaching the horizontal small hole and start to continuously rise according to the principle of a U-shaped pipe, and stopping injecting the grouting material when reaching the top of the wallboard, so as to realize compact filling of each vertical through space; fifthly, after the grouting material is solidified and hardened, the horizontal small holes formed in the bottom of the wallboard are naturally sealed by the solidified grouting material, and finally the plastic hoses are removed.
5. The method for splicing the desulfurized gypsum based composite light wallboard of claim 4, wherein the grouting material comprises the following components in parts by mass: 50-55% of semi-water desulfurized gypsum, 10-15% of mineral powder, 1-5% of rubber powder and 25-39% of water.
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| CN201911178700.9A CN110878600A (en) | 2019-11-27 | 2019-11-27 | Desulfurized gypsum based composite light wallboard and splicing method thereof |
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| CN201911178700.9A CN110878600A (en) | 2019-11-27 | 2019-11-27 | Desulfurized gypsum based composite light wallboard and splicing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113931330A (en) * | 2021-11-05 | 2022-01-14 | 石亚磊 | Greening heat-insulating board for building exterior wall surface |
Citations (8)
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