CN112159188A - Light gypsum block and preparation method thereof - Google Patents
Light gypsum block and preparation method thereof Download PDFInfo
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- CN112159188A CN112159188A CN202010937138.XA CN202010937138A CN112159188A CN 112159188 A CN112159188 A CN 112159188A CN 202010937138 A CN202010937138 A CN 202010937138A CN 112159188 A CN112159188 A CN 112159188A
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- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 111
- 239000010440 gypsum Substances 0.000 title claims abstract description 111
- 238000002360 preparation method Methods 0.000 title abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 239000000843 powder Substances 0.000 claims abstract description 67
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims abstract description 59
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 51
- 239000000835 fiber Substances 0.000 claims abstract description 43
- 239000003607 modifier Substances 0.000 claims abstract description 40
- 230000002940 repellent Effects 0.000 claims abstract description 38
- 239000005871 repellent Substances 0.000 claims abstract description 38
- 239000010451 perlite Substances 0.000 claims abstract description 37
- 235000019362 perlite Nutrition 0.000 claims abstract description 37
- 230000004913 activation Effects 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 56
- 238000005303 weighing Methods 0.000 claims description 39
- 239000000463 material Substances 0.000 claims description 25
- 238000005266 casting Methods 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 15
- 229910052925 anhydrite Inorganic materials 0.000 claims description 13
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 13
- 239000007791 liquid phase Substances 0.000 claims description 12
- 239000007790 solid phase Substances 0.000 claims description 12
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 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 10
- 239000012071 phase Substances 0.000 claims description 10
- 239000003365 glass fiber Substances 0.000 claims description 8
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 claims description 7
- 229920002748 Basalt fiber Polymers 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 7
- 229910052599 brucite Inorganic materials 0.000 claims description 7
- -1 polyethylene Polymers 0.000 claims description 7
- 229920000573 polyethylene Polymers 0.000 claims description 7
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 7
- 239000011118 polyvinyl acetate Substances 0.000 claims description 7
- 229940047670 sodium acrylate Drugs 0.000 claims description 7
- 230000003213 activating effect Effects 0.000 claims description 6
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 claims description 6
- 229920000768 polyamine Polymers 0.000 claims description 6
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims description 6
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 6
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 6
- 229940048086 sodium pyrophosphate Drugs 0.000 claims description 6
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 6
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 6
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005336 cracking Methods 0.000 abstract description 13
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 230000036571 hydration Effects 0.000 abstract description 4
- 238000006703 hydration reaction Methods 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 abstract description 4
- 238000012851 eutrophication Methods 0.000 abstract description 2
- 230000002045 lasting effect Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 239000008399 tap water Substances 0.000 description 19
- 235000020679 tap water Nutrition 0.000 description 19
- 230000005587 bubbling Effects 0.000 description 11
- 230000002209 hydrophobic effect Effects 0.000 description 11
- 239000008367 deionised water Substances 0.000 description 10
- 229910021641 deionized water Inorganic materials 0.000 description 10
- 239000000126 substance Substances 0.000 description 9
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical group [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 8
- 229920002725 thermoplastic elastomer Polymers 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 230000036314 physical performance Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 2
- 238000007582 slurry-cast process Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229920006132 styrene block copolymer Polymers 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000003779 hair growth Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- ROSDSFDQCJNGOL-UHFFFAOYSA-N protonated dimethyl amine Natural products CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/143—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
-
- 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
- B28B1/24—Producing shaped prefabricated articles from the material by injection moulding
-
- 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
- B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a light gypsum block and a preparation method thereof, and the light gypsum block comprises the following raw materials, by weight, 200-300 parts of building gypsum powder, 3-7 parts of 80-100 mesh expanded perlite, 110-260 parts of water, 1-15 parts of 3-5mm fiber, 0.5-5 parts of a water repellent, 0.5-3 parts of a homogeneous agent and 0.5-5 parts of an activation modifier. The prepared gypsum block can properly prolong the setting time of the phosphogypsum slurry under the condition of not increasing the cost basically, improve the convenience of pouring construction, reduce the strength loss in the hydration process of the block, improve the fracture resistance and the lasting waterproof capability of the gypsum block, avoid the surface cracking and bulging of the block and avoid the eutrophication of the surface of the block.
Description
Technical Field
The invention relates to a phosphogypsum building block, in particular to a light gypsum building block and a preparation method thereof.
Background
The gypsum block is a light building gypsum product prepared by using beta building gypsum powder as a main raw material and adding water, stirring, casting, molding and drying. During the production process, fiber reinforced material or light aggregate may be added, and foaming agent may be also added to lower the volume weight of the building block and raise the fracture resisting physical performance. The novel wall material has the advantages of sound insulation, fire prevention, convenience and quickness in construction and the like, is a novel wall material which is low-carbon, environment-friendly and healthy and meets the development requirements of times, and is mainly used as a non-bearing inner partition wall in houses, office buildings, hotels and the like.
The development of novel wall materials is an important content of the basic national policy of insisting on resource saving and environmental protection, is an important measure for comprehensively implementing the promotion of ecological civilization construction in the centers and the national institutes of the Party, and is a necessary requirement for implementing the sustainable development strategy of the economic society of China. The gypsum block belongs to a green building material product, accords with the sustainable development concept, and is widely applied in the world. The usage amount of the interior wall in Europe exceeds 35%, the preparation and use of the gypsum block in China starts late, beginning in the 70 th 20 th century, at present, the gypsum product is mainly used in the building industry by decorative lines, gypsum boards and plastering gypsum, the application proportion of the gypsum block is still low, and the gypsum block belongs to the market cultivation stage, however, in recent years, the real estate industry in China is rapidly developed, and the newly increased building area is 13 hundred million m every year2In addition to the development of a series of industry supporting policies and guidance opinions, as indicated by the development plan of building material industry (2016-2020), the application proportion of green building materials in new buildings reaches more than 40% by 2020. The building gypsum block is used as an energy-saving and environment-friendly novel wall material, and the proportion is further improved in building application.
The traditional preparation process of the gypsum building block mainly comprises the steps of adding water for stirring and naturally pouring, but the initial setting time of building gypsum powder is short, mostly about 5-7min, the water hardening speed is high, the gypsum building block is not beneficial to pouring forming, and the early strength is highThe degree loss is large. The building gypsum block prepared by taking the phosphogypsum as the raw material has poor water resistance or poor water resistance durability because impurity removal and purification are not in place, and P remained in the phosphogypsum is reduced along with the reduction of the water resistance effect in the rainy and humid environment in the south2O5Provides nutrient substances for microorganisms, and has the phenomena of greenness and hair growth on the surface of the building block, thereby not only influencing the strength of the building block, but also influencing the integral beauty of the building.
Disclosure of Invention
In order to solve the problems, the invention provides the light gypsum block and the preparation method thereof, and the prepared gypsum block can properly prolong the setting time of the phosphogypsum slurry under the condition of not increasing the cost basically, improve the convenience of pouring construction, reduce the strength loss in the hydration process of the block, improve the fracture resistance and the lasting waterproof capability of the gypsum block, avoid the surface cracking and swelling of the block and avoid the occurrence of the eutrophication phenomenon on the surface of the block.
The light gypsum block comprises, by weight, 200-300 parts of building gypsum powder, 3-7 parts of 80-100 mesh expanded perlite, 110-260 parts of water, 1-15 parts of 3-5mm fiber, 0.5-5 parts of a water repellent, 0.5-3 parts of a homogeneous agent and 0.5-5 parts of an activation modifier.
The fiber is at least one of glass fiber, basalt fiber and brucite fiber.
The water repellent is an organic silicon waterproof agent.
The activating modifier is at least one of polyvinyl acetate, polyamine, styrene-butadiene-styrene adhesive and polyethylene.
The homogeneous phase agent is one or more than one of sodium hexametaphosphate, sodium pyrophosphate, sodium tripolyphosphate and sodium acrylate.
The building gypsum powder is prepared from phosphogypsum.
The semi-hydrated gypsum content in the building gypsum powder is 70-85%, and the anhydrite content is 2% -8%.
The preparation method of the light phosphogypsum building block comprises the following steps: (1) weighing 200-300 parts of building gypsum powder; (2) weighing 3-7 parts of expanded perlite powder of 80-100 meshes; (3) placing the weighed building gypsum powder and expanded perlite into a V-shaped mixer to be uniformly mixed; (4) weighing 100-240 parts of water, putting the water into a stirring pot, adding 1-15 parts of 3-5mm fibers, 0.5-5 parts of a water repellent and 0.5-3 parts of a homogeneous agent, and uniformly stirring; (5) weighing 0.5-5 parts of activation modifier, stirring in 10-20 parts of 60 ℃ warm water for 2min, and cooling; (6) mixing and stirring the liquid phase and the solid phase in the steps (4) and (5), adding the phosphogypsum powder and the expanded perlite mixed in the step (3) into the mixture at a constant speed within 30-60 seconds, and uniformly stirring; (7) pouring the mixed material in the step (6) into a building mould; (8) and (3) after the building block is completely cured, removing the mould to prepare the light phosphogypsum building block.
And (7) quickly transferring the mixed material in the step (6) to a jet casting machine within 30 seconds, and then casting the mixed material in a building mould.
The building gypsum powder in the invention adopts the building gypsum powder with the semi-hydrated gypsum content of 70-85%, and ensures that a part of anhydrite components exist, thereby prolonging the water hardening time of gypsum and improving the operation controllability. The added expanded perlite and fiber material with specific fineness can reduce the apparent density of the phosphogypsum building block, does not influence the whiteness of the building block, ensures the attractiveness of the building block when the building block is used as an inner wall material, and enhances the fracture resistance of the building block. The addition of the water repellent improves the weather resistance of the building block. The homogeneous phase agent and the activation modifier are added, and the casting is carried out in a spraying mode, so that the stability between solid and liquid phases during the preparation of the building block is ensured, the convenience for preparing the building block is improved, and the crack resistance and the durability of the building block are improved. The homogeneous agent is added, so that the slurry can be uniformly mixed, the excessively high hydration speed of the gypsum is avoided, and the convenience of the preparation process is improved. By adopting the method of jet casting, the slurry casting can be more compact, the generation of bubbles is reduced, and the physical performance of the building block is ensured. The addition of the activation modifier improves the crack resistance and durability of the building block and avoids the cracking and bubbling of the building block. The final phosphogypsum building block has the apparent density less than 900kg/m3Breaking loadThe solid gypsum block has the advantages of more than 2500N, compressive strength of 7d of more than 15MPa, flexural strength of more than 7MPa, hydrophobic rate of more than 99.9 percent, softening coefficient of more than 0.65, white and light color, excellent compressive and flexural resistance, certain bearing capacity, capability of meeting the performance index requirements of the solid gypsum block, moisture resistance, smooth and flat surface, no bubbling, no cracking, no greenness and long moss and excellent weather resistance.
Detailed Description
A light phosphogypsum building block comprises, by weight, 200-300 parts of building gypsum powder, 3-7 parts of 80-100 mesh expanded perlite, 110-260 parts of water, 1-15 parts of 3-5mm fibers, 0.5-5 parts of a water repellent, 0.5-3 parts of a homogeneous agent and 0.5-5 parts of an activation modifier.
The fiber is at least one of glass fiber, basalt fiber and brucite fiber.
The water repellent is an organic silicon waterproof agent.
The activating modifier is at least one of polyvinyl acetate, polyamine, styrene-butadiene-styrene adhesive and polyethylene.
The homogeneous phase agent is one or more than one of sodium hexametaphosphate, sodium pyrophosphate, sodium tripolyphosphate and sodium acrylate.
The building gypsum powder is prepared from phosphogypsum.
The semi-hydrated gypsum content in the building gypsum powder is 70-85%, and the anhydrite content is 2% -8%.
The preparation method of the light phosphogypsum building block comprises the following steps: (1) weighing 200-300 parts of building gypsum powder; (2) weighing 3-7 parts of expanded perlite powder of 80-100 meshes; (3) placing the weighed building gypsum powder and expanded perlite into a V-shaped mixer to be uniformly mixed; (4) weighing 100-240 parts of water, putting the water into a stirring pot, adding 1-15 parts of 3-5mm fibers, 0.5-5 parts of a water repellent and 0.5-3 parts of a homogeneous agent, and uniformly stirring; (5) weighing 0.5-5 parts of activation modifier, stirring in 10-20 parts of 60 ℃ warm water for 2min, and cooling; (6) mixing and stirring the liquid phase and the solid phase in the steps (4) and (5), adding the phosphogypsum powder and the expanded perlite mixed in the step (3) into the mixture at a constant speed within 30-60 seconds, and uniformly stirring; (7) pouring the mixed material in the step (6) into a building mould; (8) and (3) after the building block is completely cured, removing the mould to prepare the light phosphogypsum building block.
And (7) quickly transferring the mixed material in the step (6) to a jet casting machine within 30 seconds, and then casting the mixed material in a building mould.
The building gypsum powder in the invention adopts the building gypsum powder with the semi-hydrated gypsum content of 70-85%, and ensures that a part of anhydrite components exist, thereby prolonging the water hardening time of gypsum and improving the operation controllability. The added expanded perlite and fiber material with specific fineness can reduce the apparent density of the phosphogypsum building block, does not influence the whiteness of the building block, ensures the attractiveness of the building block when the building block is used as an inner wall material, and enhances the fracture resistance of the building block. The addition of the water repellent improves the weather resistance of the building block. The homogeneous phase agent and the activation modifier are added, and the casting is carried out in a spraying mode, so that the stability between solid and liquid phases during the preparation of the building block is ensured, the convenience for preparing the building block is improved, and the crack resistance and the durability of the building block are improved. The homogeneous agent is added, so that the slurry can be uniformly mixed, the excessively high hydration speed of the gypsum is avoided, and the convenience of the preparation process is improved. By adopting the method of jet casting, the slurry casting can be more compact, the generation of bubbles is reduced, and the physical performance of the building block is ensured. The addition of the activation modifier improves the crack resistance and durability of the building block and avoids the cracking and bubbling of the building block. The final phosphogypsum building block has the apparent density less than 900kg/m3The breaking load is more than 2500N, the 7d compressive strength is more than 15MPa, the flexural strength is more than 7MPa, the hydrophobic rate is more than 99.9 percent, the softening coefficient is more than 0.65, the block is white and light, has excellent compressive and flexural resistance, has certain bearing capacity, meets the performance index requirements of the solid gypsum block, can prevent moisture, has smooth and flat surface, does not bubble, does not crack, does not turn green and has long coating, and has excellent weather resistance.
The present invention is described in detail below with reference to specific embodiments, it should be noted that the embodiments are only used for further illustration of the present invention, and should not be construed as limiting the scope of the present invention, and those skilled in the art can make modifications and adaptations of the present invention based on the above-mentioned disclosure.
Example 1:
the light phosphogypsum building block comprises, by weight, 250 parts of building gypsum powder, 5 parts of 80-mesh expanded perlite, 175 parts of tap water, 12 parts of 60 ℃ tap water, 5 parts of 3-5mm fiber, 1 part of water repellent, 1.5 parts of homogeneous agent and 0.5 part of activation modifier. The building gypsum powder is prepared from phosphogypsum, and contains 75% of semi-hydrated gypsum and 5% of anhydrite; the fibers are glass fibers; the water repellent is an organic silicon waterproof agent and silane group, the active content of the water repellent is more than 20 percent, and the second generation of the Meihui waterproof penetrant is Heixing chemical and trade company, Fujian Heiwan county; the activation modifier is polyvinyl acetate; the homogeneous agent is sodium hexametaphosphate.
The preparation method of the light phosphogypsum building block comprises the following steps:
(1) weighing 250 parts of building gypsum powder, weighing 5 parts of expanded perlite of 80 meshes, and uniformly mixing the gypsum powder and the expanded perlite in a V-shaped mixer by a dry method;
(2) weighing 0.5 part of activation modifier, and dissolving in 12 parts of tap water at 60 ℃;
(3) weighing 175 parts of tap water, 5 parts of 3-5mm fibers, 1 part of water repellent and 1.5 parts of homogeneous agent, mixing and stirring at the normal temperature of 24 ℃ for 3min, uniformly stirring, mixing with the liquid obtained in the step (2), and uniformly stirring;
(3) continuously stirring the product obtained in the step (2), adding uniformly mixed gypsum powder and expanded perlite at a constant speed within 45 seconds, transferring the uniformly mixed material into a jet casting machine within 30 seconds, rapidly jetting and casting the material into a building mould, unloading the mould after the building block is dried to obtain a gypsum building block of 600 x 500 x 80mm, wherein the apparent density of the obtained building block is 832kg/m3The fracture load is 2950N, the 7d compressive strength is 16.35MPa, the breaking strength is 9.26MPa, the hydrophobic rate is 99.9 percent, the softening coefficient is 0.73, and the hardening time is 26 min; in addition, the obtained building block is white with naked eyes, the surface is smooth and flat, and the surface is placed for 180 days under natural conditionsNo bubbling and no cracking.
Comparative example 1
Compared with the example 1, the raw materials are the same except that the raw materials do not contain the activation modifier and 12 parts of 60 ℃ warm water for dissolving the activation modifier, in addition, the preparation method does not contain the step (2), and the step (3) is to weigh 175 parts of tap water, 5 parts of 3-5mm fibers, 1 part of water repellent and 1.5 parts of homogeneous agent, mix and stir for 3min at the normal temperature of 24 ℃, and stir uniformly. The other steps were the same as in example 1. The gypsum block with the size of 600 multiplied by 500 multiplied by 80mm is prepared, and the apparent density of the obtained block is 832kg/m3The fracture load is 2950N, the 7d compressive strength is 16.35MPa, the breaking strength is 9.26MPa, the hydrophobic rate is 99.9 percent, the softening coefficient is 0.73, and the hardening time is 25 min; in addition, the obtained building block is white, smooth and flat in surface, and slightly bubbled and micro-cracks of 1-3mm are formed on the surface after being placed for 180 days under the same natural conditions as the example 1.
Example 2:
a light phosphogypsum building block comprises, by weight, 200 parts of building gypsum powder, 3 parts of 100-mesh expanded perlite, 100 parts of tap water, 10 parts of 60 ℃ tap water, 1 part of 3-5mm fiber, 0.5 part of a water repellent, 0.5 part of a homogeneous agent and 0.5 part of an activation modifier. The building gypsum powder is prepared from phosphogypsum, and contains 70% of semi-hydrated gypsum and 2% of anhydrite; the fiber is basalt fiber; the water repellent is an organic silicon waterproof agent (silane group, the active content is more than 20 percent, the second generation of the Meihui waterproof penetrant, Huiching chemical and trade company, Fujian Huian county); the activation modifier is polyamine (propylene oxide dimethylamine chloride copolymer, LSC53, tin-free, Tianxin chemical Co., Ltd.); the homogeneous agent is sodium pyrophosphate.
The preparation method of the light phosphogypsum building block comprises the following steps:
(1) weighing 200 parts of building gypsum powder; (2) weighing 3 parts of expanded perlite powder of 100 meshes; (3) placing the weighed building gypsum powder and expanded perlite into a V-shaped mixer to be uniformly mixed; (4) adding 100 parts of water into a stirring pot, adding 1 part of 3-5mm fiber, 0.5 part of water repellent and 0.5 part of homogeneous agent, and heating at room temperature of 15 deg.CStirring uniformly; (5) weighing 0.5 part of activation modifier, stirring in 10 parts of 60 ℃ tap water for 2min, and cooling; (6) mixing and stirring the liquid phase and the solid phase in the step (4) and the step (5) uniformly; uniformly adding the uniformly mixed phosphogypsum powder and expanded perlite in the step (3) within 30-60 seconds, and uniformly stirring; (7) quickly transferring the uniformly mixed material in the step (6) to a jet casting machine within 30 seconds, and then casting the mixture into a building mold; (8) and (3) after the building block is completely cured, removing the mould to prepare the light phosphogypsum building block. The obtained block had an apparent density of 856kg/m3The fracture load is 2870N, the 7d compressive strength is 15.98MPa, the breaking strength is 9.08MPa, the hydrophobic rate is 99.9 percent, the softening coefficient is 0.75, and the hardening time is 12 min; in addition, the obtained building block is white to naked eyes, the surface is smooth and flat, and the building block does not have bubbling and cracking on the surface after being placed for 180 days under the same natural condition as that of the building block in the example 1.
Example 3:
a light phosphogypsum building block comprises, by weight, 300 parts of building gypsum powder, 7 parts of 80-100 mesh expanded perlite, 240 parts of tap water, 20 parts of 60 ℃ tap water, 15 parts of 3-5mm fibers, 5 parts of a water repellent, 3 parts of a homogeneous agent and 5 parts of an activation modifier. The building gypsum powder is prepared from phosphogypsum, and contains 85% of semi-hydrated gypsum and 8% of anhydrite; the fibers are brucite fibers; the water repellent is an organic silicon waterproof agent (silane group, the active content is more than 20 percent, the second generation of the Meihui waterproof penetrant, Huiching chemical and trade company, Fujian Huian county); the activation modifier is styrene-butadiene-styrene binder (a styrene block copolymer thermoplastic elastomer, TPE YH-188, tombstone); the homogeneous agent is sodium tripolyphosphate.
The preparation method of the light phosphogypsum building block comprises the following steps:
(1) weighing 300 parts of building gypsum powder; (2) weighing 7 parts of expanded perlite powder of 80-100 meshes; (3) placing the weighed building gypsum powder and expanded perlite into a V-shaped mixer to be uniformly mixed; (4) adding 240 parts of water into a stirring pot, and adding 15 parts of 3-5mm fiber and hydrophobic5 parts of water agent and 3 parts of homogeneous phase agent are evenly stirred at room temperature of 15 ℃; (5) weighing 5 parts of activating modifier, stirring in 20 parts of 60 ℃ tap water for 2min, and cooling; (6) mixing and stirring the liquid phase and the solid phase in the steps (4) and (5) uniformly; uniformly adding the phosphogypsum powder and the expanded perlite which are uniformly mixed in the step (3) into the mixture within 60 seconds, and uniformly stirring; (7) quickly transferring the uniformly mixed material in the step (6) to a jet casting machine within 30 seconds, and then casting the mixture into a building mold; (8) and (3) after the building block is completely cured, removing the mould to prepare the light phosphogypsum building block. The apparent density of the obtained building block is 806kg/m3The breaking load 3024N, the 7d compressive strength is 17.58MPa, the breaking strength is 10.59MPa, the hydrophobic rate is 99.9%, the softening coefficient is 0.63, and the hardening time is 34 min; in addition, the obtained building block is white to naked eyes, the surface is smooth and flat, and the building block does not have bubbling and cracking on the surface after being placed for 180 days under the same natural condition as that of the building block in the example 1.
Example 4:
a light phosphogypsum building block comprises, by weight, 220 parts of building gypsum powder, 6 parts of 80-100 mesh expanded perlite, 110 parts of tap water, 15 parts of 60 ℃ tap water, 2 parts of 3-5mm fibers, 4 parts of a water repellent, 2.8 parts of a homogeneous agent and 2.5 parts of an activation modifier. The building gypsum powder is prepared from phosphogypsum, and contains 78% of semi-hydrated gypsum and 6% of anhydrite; 1 part of glass fiber and 1 part of basalt fiber in the fiber; the water repellent is an organic silicon waterproof agent (silane group, the active content is more than 20 percent, the second generation of the Meihui waterproof penetrant, Huiching chemical and trade company, Fujian Huian county); the molecular weight of the polyethylene in the activation modifier is 280-560 ten thousand; the homogeneous agent is sodium acrylate.
The preparation method of the light phosphogypsum building block comprises the following steps:
(1) weighing 220 parts of building gypsum powder; (2) weighing 6 parts of expanded perlite powder of 80-100 meshes; (3) placing the weighed building gypsum powder and expanded perlite into a V-shaped mixer to be uniformly mixed; (4) 110 parts of tap water is measured and put into a stirring pot, 2 parts of 3-5mm fiber, 4 parts of water repellent and 2.8 parts of homogeneous agent are added,stirring at room temperature of 25 deg.C; (5) weighing 2.5 parts of activating modifier, stirring in 15 parts of 60 ℃ tap water for 2min, and cooling; (6) mixing and stirring the liquid phase and the solid phase in the steps (4) and (5) uniformly; uniformly adding the phosphogypsum powder and the expanded perlite which are uniformly mixed in the step (3) into the mixture within 35 seconds, and uniformly stirring; (7) quickly transferring the uniformly mixed material in the step (6) to a jet casting machine within 30 seconds, and then casting the mixture into a building mold; (8) and (3) after the building block is completely cured, removing the mould to prepare the light phosphogypsum building block. The resulting block had an apparent density of 815kg/m3The breaking load 3020N, the 7d compressive strength is 16.89MPa, the breaking strength is 9.90MPa, the hydrophobic rate is 99.9%, the softening coefficient is 0.68, and the hardening time is 29 min; in addition, the obtained building block is white to naked eyes, the surface is smooth and flat, and the building block does not have bubbling and cracking on the surface after being placed for 180 days under the same natural condition as that of the building block in the example 1.
Example 5:
a light phosphogypsum building block comprises, by weight, 290 parts of building gypsum powder, 4 parts of 80-mesh expanded perlite, 100-240 parts of tap water, 12 parts of 60 ℃ tap water, 14 parts of 3-5mm fibers, 1.5 parts of a water repellent, 1 part of a homogeneous agent and 1.8 parts of an activation modifier. The building gypsum powder is prepared from phosphogypsum, and contains 75% of semi-hydrated gypsum and 4% of anhydrite; in the fiber, 2 parts of glass fiber, 5 parts of basalt fiber and 7 parts of brucite fiber are adopted; the water repellent is an organic silicon waterproof agent (silane group, the active content is more than 20 percent, the second generation of the Meihui waterproof penetrant, Huiching chemical and trade company, Fujian Huian county); 0.8 part of polyvinyl acetate and 1 part of polyamine (epoxychloropropylene dimethylamine copolymer, LSC53, tin-free Tianxin chemical Co., Ltd.) in the activation modifier; the homogeneous agent comprises 0.5 part of sodium hexametaphosphate and 0.5 part of sodium pyrophosphate.
The preparation method of the light phosphogypsum building block comprises the following steps:
(1) weighing 290 parts of building gypsum powder; (2) weighing 4 parts of expanded perlite powder of 80 meshes; (3) placing the weighed building gypsum powder and expanded perlite into a V-shaped mixer to be uniformly mixed(ii) a (4) Weighing 150 parts of tap water into a stirring pot, adding 14 parts of 3-5mm fibers, 1.5 parts of water repellent and 1 part of homogeneous agent, and uniformly stirring at room temperature of 19 ℃; (5) weighing 1.8 parts of activation modifier, stirring in 12 parts of 60 ℃ tap water for 2min, and cooling; (6) mixing and stirring the liquid phase and the solid phase in the steps (4) and (5) uniformly; uniformly adding the phosphogypsum powder and the expanded perlite which are uniformly mixed in the step (3) into the mixture within 40 seconds, and uniformly stirring; (7) quickly transferring the uniformly mixed material in the step (6) to a jet casting machine within 30 seconds, and then casting the mixture into a building mold; (8) and (3) after the building block is completely cured, removing the mould to prepare the light phosphogypsum building block. The obtained building block has an apparent density of 789kg/m3The breaking load is 3125N, the 7d compressive strength is 17.42MPa, the breaking strength is 10.78MPa, the hydrophobic rate is 99.9%, the softening coefficient is 0.79, and the hardening time is 18 min; in addition, the obtained building block is white to naked eyes, the surface is smooth and flat, and the building block does not have bubbling and cracking on the surface after being placed for 180 days under the same natural condition as that of the building block in the example 1.
Example 6:
a light phosphogypsum building block comprises, by weight, 286 parts of building gypsum powder, 3.5 parts of 100-mesh expanded perlite, 130 parts of deionized water, 16 parts of 60 ℃ deionized water, 3 parts of 3-5mm fibers, 4 parts of a water repellent, 1.2 parts of a homogeneous agent and 3 parts of an activation modifier. The building gypsum powder is prepared from phosphogypsum, the content of semi-hydrated gypsum in the building gypsum powder is 70%, and anhydrite is not contained; the fibers comprise 2 parts of basalt fibers and 1 part of brucite fibers; the water repellent is an organic silicon waterproof agent (silane group, the active content is more than 20 percent, the second generation of the Meihui waterproof penetrant, Huiching chemical and trade company, Fujian Huian county); the activation modifier is 1 part of styrene-butadiene-styrene binder (a styrene series block copolymer thermoplastic elastomer, TPE YH-188, tombstone) and 2 parts of polyethylene (molecular weight is 280-560 ten thousand); the homogeneous phase agent comprises 0.4 part of sodium tripolyphosphate and 0.8 part of sodium acrylate.
The preparation method of the light phosphogypsum building block comprises the following steps:
(1) weighing 286 parts of building gypsumPulverizing; (2) weighing 3.5 parts of expanded perlite powder of 100 meshes; (3) placing the weighed building gypsum powder and expanded perlite into a V-shaped mixer to be uniformly mixed; (4) weighing 130 parts of deionized water in a stirring pot, adding 3 parts of 3-5mm fibers, 4 parts of a water repellent and 1.2 parts of a homogeneous agent, and uniformly stirring at room temperature of 14 ℃; (5) weighing 3 parts of activation modifier, stirring in 16 parts of 60 ℃ deionized water for 2min, and cooling; (6) mixing and stirring the liquid phase and the solid phase in the steps (4) and (5) uniformly; uniformly adding the phosphogypsum powder and the expanded perlite which are uniformly mixed in the step (3) into the mixture within 45 seconds, and uniformly stirring; (7) pouring the uniformly mixed materials in the step (6) into a building mold; (8) and (3) after the building block is completely cured, removing the mould to prepare the light phosphogypsum building block. The apparent density of the obtained building block is 843kg/m3The fracture load is 2980N, the 7d compressive strength is 16.28MPa, the breaking strength is 9.89MPa, the hydrophobic rate is 99.9 percent, the softening coefficient is 0.75, and the hardening time is 21 min; in addition, the obtained building block is white to naked eyes, the surface is smooth and flat, and the building block does not have bubbling and cracking on the surface after being placed for 180 days under the same natural condition as that of the building block in the example 1.
Example 7:
a light phosphogypsum building block comprises, by weight, 289 parts of building gypsum powder, 6 parts of 80-100 mesh expanded perlite, 100-240 parts of deionized water, 18 parts of 60 ℃ deionized water, 12 parts of 3-5mm fibers, 1.2 parts of a water repellent, 3 parts of a homogeneous phase agent and 4 parts of an activation modifier. The building gypsum powder is prepared from phosphogypsum, the content of semi-hydrated gypsum in the building gypsum powder is 80%, and no anhydrite exists; the fiber comprises 8 parts of glass fiber and 4 parts of brucite fiber; the water repellent is an organic silicon waterproof agent (silane group, the active content is more than 20 percent, the second generation of the Meihui waterproof penetrant, Huiching chemical and trade company, Fujian Huian county); the activating modifier is 2 parts of polyvinyl acetate and 2 parts of polyethylene, and the molecular weight of the polyethylene is 280-560 ten thousand; the homogeneous agent comprises 1 part of sodium hexametaphosphate and 2 parts of sodium acrylate.
The preparation method of the light phosphogypsum building block comprises the following steps:
(1) weighing 289 parts of building gypsum powder; (2) weighing6 parts of expanded perlite powder with 80-100 meshes; (3) placing the weighed building gypsum powder and expanded perlite into a V-shaped mixer to be uniformly mixed; (4) adding 240 parts of water into a stirring pot, adding 12 parts of 3-5mm fibers, 1.2 parts of a water repellent and 3 parts of a homogeneous agent, and uniformly stirring at room temperature of 21 ℃; (5) weighing 4 parts of activation modifier, stirring in 18 parts of 60 ℃ warm water for 2min, and cooling; (6) mixing and stirring the liquid phase and the solid phase in the steps (4) and (5) uniformly; uniformly adding the phosphogypsum powder and the expanded perlite which are uniformly mixed in the step (3) into the mixture within 35 seconds, and uniformly stirring; (7) pouring the uniformly mixed materials in the step (6) into a building mold; (8) and (3) after the building block is completely cured, removing the mould to prepare the light phosphogypsum building block. The apparent density of the obtained building block is 808kg/m3The fracture load is 2986N, the 7d compressive strength is 16.63MPa, the breaking strength is 10.02MPa, the hydrophobic rate is 99.9 percent, the softening coefficient is 0.76, and the hardening time is 28 min; in addition, the obtained building block is white to naked eyes, the surface is smooth and flat, and the building block does not have bubbling and cracking on the surface after being placed for 180 days under the same natural condition as that of the building block in the example 1.
Example 8:
a light phosphogypsum building block comprises, by weight, 210 parts of building gypsum powder, 3.2 parts of 80-100 mesh expanded perlite, 100 parts of deionized water, 13 parts of 60 ℃ deionized water, 1.8 parts of 3-5mm fibers, 1.5 parts of a water repellent, 1.5 parts of a homogeneous phase agent and 2 parts of an activation modifier. The building gypsum powder is prepared from phosphogypsum, and contains 78% of hemihydrate gypsum and 4% of anhydrite; the fibers are glass fibers; the water repellent is an organic silicon waterproof agent (silane group, the active content is more than 20 percent, the second generation of the Meihui waterproof penetrant, Huiching chemical and trade company, Fujian Huian county); the activation modifier is 0.8 part of polyvinyl acetate, 0.6 part of polyamine (epoxychloropropanediamine copolymer, LSC53, Tanxin chemical Co., Ltd. in Wuxi city), and 0.6 part of styrene-butadiene-styrene binder (a styrene block copolymer thermoplastic elastomer, TPE YH-188, Basingite); the homogeneous phase agent comprises 0.4 part of sodium pyrophosphate, 0.8 part of sodium tripolyphosphate and 0.3 part of sodium acrylate.
The preparation method of the light phosphogypsum building block comprises the following steps:
(1) weighing 210 parts of building gypsum powder; (2) weighing 3.2 parts of expanded perlite powder of 80-100 meshes; (3) placing the weighed building gypsum powder and expanded perlite into a V-shaped mixer to be uniformly mixed; (4) weighing 100 parts of deionized water in a stirring pot, adding 1.8 parts of 3-5mm fibers, 1.5 parts of a water repellent and 1.5 parts of a homogeneous agent, and uniformly stirring at room temperature of 18 ℃; (5) weighing 2 parts of activation modifier, stirring in 13 parts of 60 ℃ deionized water for 2min, and cooling; (6) mixing and stirring the liquid phase and the solid phase in the steps (4) and (5) uniformly; uniformly adding the phosphogypsum powder and the expanded perlite which are uniformly mixed in the step (3) into the mixture within 50 seconds, and uniformly stirring; (7) quickly transferring the uniformly mixed material in the step (6) to a jet casting machine within 30 seconds, and then casting the mixture into a building mold; (8) and (3) after the building block is completely cured, removing the mould to prepare the light phosphogypsum building block. The apparent density of the obtained building block is 849kg/m3The breaking load 3021N, the 7d compressive strength is 16.48MPa, the breaking strength is 8.97MPa, the hydrophobic rate is 99.9%, the softening coefficient is 0.69, and the hardening time is 22 min; in addition, the obtained building block is white to naked eyes, the surface is smooth and flat, and the building block does not have bubbling and cracking on the surface after being placed for 180 days under the same natural condition as that of the building block in the example 1.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (9)
1. A light gypsum block is characterized in that: the building gypsum powder water repellent comprises, by weight, 200-300 parts of building gypsum powder, 3-7 parts of 80-100 mesh expanded perlite, 110-260 parts of water, 1-15 parts of 3-5mm fibers, 0.5-5 parts of a water repellent, 0.5-3 parts of a homogeneous agent and 0.5-5 parts of an activation modifier.
2. The lightweight gypsum block of claim 1, wherein: the fiber is at least one of glass fiber, basalt fiber and brucite fiber.
3. The lightweight gypsum block of claim 1, wherein: the water repellent is an organic silicon waterproof agent.
4. The lightweight gypsum block of claim 1, wherein: the activating modifier is at least one of polyvinyl acetate, polyamine, styrene-butadiene-styrene adhesive and polyethylene.
5. The lightweight gypsum block of claim 1, wherein: the homogeneous phase agent is one or more than one of sodium hexametaphosphate, sodium pyrophosphate, sodium tripolyphosphate and sodium acrylate.
6. The lightweight gypsum block of claim 1, wherein: the building gypsum powder is prepared from phosphogypsum.
7. The lightweight gypsum block of claim 1 or 6, wherein: the semi-hydrated gypsum content in the building gypsum powder is 70-85%, and the anhydrite content is 2% -8%.
8. The method of making a lightweight gypsum block according to any one of claims 1 to 7, wherein: the method comprises the following steps: (1) weighing 200-300 parts of building gypsum powder; (2) weighing 3-7 parts of expanded perlite powder of 80-100 meshes; (3) placing the weighed building gypsum powder and expanded perlite into a V-shaped mixer to be uniformly mixed; (4) weighing 100-240 parts of water, putting the water into a stirring pot, adding 1-15 parts of 3-5mm fibers, 0.5-5 parts of a water repellent and 0.5-3 parts of a homogeneous agent, and uniformly stirring; (5) weighing 0.5-5 parts of activation modifier, stirring in 10-20 parts of 60 ℃ warm water for 2min, and cooling; (6) mixing and stirring the liquid phase and the solid phase in the steps (4) and (5), adding the phosphogypsum powder and the expanded perlite mixed in the step (3) into the mixture at a constant speed within 30-60 seconds, and uniformly stirring; (7) pouring the mixed material in the step (6) into a building mould; (8) and (3) after the building block is completely cured, removing the mould to prepare the light phosphogypsum building block.
9. The method of making a lightweight gypsum block according to claim 8, wherein: and (7) quickly transferring the mixed material in the step (6) to a jet casting machine within 30 seconds, and then casting the mixed material in a building mould.
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