CN110818373A - Desulfurized gypsum based EPS particle heat-insulation wall and preparation method thereof - Google Patents
Desulfurized gypsum based EPS particle heat-insulation wall and preparation method thereof Download PDFInfo
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- 239000010440 gypsum Substances 0.000 title claims abstract description 94
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 94
- 239000002245 particle Substances 0.000 title claims abstract description 64
- 238000009413 insulation Methods 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000004568 cement Substances 0.000 claims abstract description 22
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 22
- 150000004645 aluminates Chemical class 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000011398 Portland cement Substances 0.000 claims abstract description 18
- 239000011230 binding agent Substances 0.000 claims abstract description 17
- 239000000835 fiber Substances 0.000 claims abstract description 15
- 239000013530 defoamer Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 85
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid group Chemical group C(CC(O)(C(=O)O)CC(=O)O)(=O)O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 27
- 239000002518 antifoaming agent Substances 0.000 claims description 17
- 229920002748 Basalt fiber Polymers 0.000 claims description 12
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 11
- 239000011118 polyvinyl acetate Substances 0.000 claims description 11
- 238000005303 weighing Methods 0.000 claims description 11
- 239000000839 emulsion Substances 0.000 claims description 10
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical group C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 7
- 238000001354 calcination Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 239000006227 byproduct Substances 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000004794 expanded polystyrene Substances 0.000 description 51
- 239000004519 grease Substances 0.000 description 7
- 239000003292 glue Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 239000011083 cement mortar Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/50—Producing shaped prefabricated articles from the material specially adapted for producing articles of expanded material, e.g. cellular concrete
-
- 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
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
-
- 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
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent 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)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Acoustics & Sound (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a desulfurized gypsum based EPS particle thermal insulation wall and a preparation method thereof, wherein the thermal insulation wall is prepared from main materials, auxiliary materials and a proper amount of water, the main materials comprise desulfurized gypsum, aluminate cement and ordinary portland cement, the desulfurized gypsum accounts for 65-85 wt%, and the auxiliary materials comprise EPS particles, gypsum retarder, fibers, binder, water reducer, building instant rubber powder and defoamer. The invention has the advantages that: (1) the method has very important practical significance for utilizing the by-products of desulfurized gypsum and waste EPS particles obtained in industrial production of thermal power plants; (2) the prepared desulfurized gypsum based EPS particle heat-insulating wall body is light in weight, high in strength, and excellent in water resistance and heat-insulating property.
Description
Technical Field
The invention relates to a wall and a preparation method thereof, in particular to a desulfurized gypsum based EPS particle heat-insulation wall and a preparation method thereof, belonging to the technical field of building materials.
Background
With the development of modern buildings to high-rise and super high-rise buildings, wall materials with light weight, heat preservation and good durability are urgently needed. At present, the gypsum wall board is prepared by taking natural building gypsum powder as a raw material and adding water for stirring, forming, maintaining and the like. Although the gypsum wall board has better use function, the natural gypsum raw material is limited and needs to be processed into fine powder before use.
China has a plurality of thermal power plants, the annual emission of desulfurized gypsum, which is a byproduct obtained in industrial production of the thermal power plants, reaches about 1 hundred million tons, and the continuous accumulation of the desulfurized gypsum not only occupies a large amount of land resources, but also causes environmental pollution and resource waste.
With the rapid development of economy and the rapid improvement of living standard of people, Expanded Polystyrene (EPS) foam consumed in China all the year around is in a straight-line rising trend, and most of EPS foam used is disposable products, such as: foam boxes for packaging/transportation, disposable tableware, building insulation panels, and the like. EPS foamed plastic belongs to organic polymer materials, degradation requires more than 100 years under natural conditions, degradation is difficult, recovery rate is low, white EPS foamed plastic emerges everywhere in a river, a lake and a land in a period of time, white pollution is caused to the environment, and toxic gas is generated by burning, such as: CO, dioxin and the like pollute the atmosphere and threaten the health of human beings.
Disclosure of Invention
The invention aims to provide a desulfurized gypsum based EPS particle heat-insulating wall body which is light in weight, high in strength, excellent in water resistance and heat-insulating property and takes desulfurized gypsum and EPS particles as raw materials, and a preparation method thereof.
In order to achieve the above object, the present invention adopts the following technical solutions:
the desulfurized gypsum based EPS particle heat-insulation wall is characterized by being prepared from main materials, auxiliary materials and a proper amount of water, wherein the mass percentages are as follows:
the main material consists of desulfurized gypsum, aluminate cement and ordinary portland cement, wherein the desulfurized gypsum accounts for 65-85 percent, and the balance is the aluminate cement and the ordinary portland cement;
the auxiliary materials comprise EPS particles, gypsum retarder, fibers, binder, water reducer, building instant rubber powder and defoamer, wherein the using amount of the EPS particles is 0.2-0.5% of the main material, the using amount of the gypsum retarder is 0.05-0.12% of the main material, the using amount of the fibers is 0.3-2.0% of the main material, the using amount of the binder is 0.1-0.6% of the main material, the using amount of the water reducer is 0.01-0.25% of the main material, the using amount of the building instant rubber powder is 0.05-0.6% of the main material, and the using amount of the defoamer is 0.02-0.25% of the main material.
The desulfurized gypsum based EPS particle thermal insulation wall is characterized in that the desulfurized gypsum is prepared by putting industrial residues of a thermal power plant into a resistance furnace, heating to 350 ℃ at the speed of 11 ℃/min by taking room temperature as an initial temperature, calcining for 3h, naturally cooling and screening.
The desulfurized gypsum based EPS particle heat-insulation wall is characterized in that the dosage ratio of the aluminate cement to the ordinary portland cement is 61: 39.
The desulfurized gypsum based EPS particle heat-insulation wall is characterized in that the water-cement ratio is 0.6.
The desulfurized gypsum based EPS particle heat-insulation wall is characterized in that the gypsum retarder is citric acid.
The desulfurized gypsum based EPS particle heat-insulation wall is characterized in that the fibers are basalt fibers.
The desulfurized gypsum based EPS particle heat-insulation wall is characterized in that the binder is polyvinyl acetate emulsion.
The desulfurized gypsum based EPS particle heat-insulation wall body is characterized in that the water reducing agent is a naphthalene sulfonic acid water reducing agent.
The desulfurized gypsum based EPS particle heat-insulation wall is characterized in that the defoaming agent is an oil defoaming agent.
The method for preparing the desulfurized gypsum based EPS particle heat-insulation wall body is characterized by comprising the following steps:
step 1: weighing the raw materials according to a formula;
step 2: mixing the binder and water according to the ratio of 1: 5-10, and stirring at low speed for 120s to dissolve the binder and water;
step 3: pouring the EPS particles into a stirring pot A, and stirring at a low speed for 60s to fully wrap the binder around the EPS particles;
step 4: pouring aluminate cement and ordinary portland cement into a stirring pot B, stirring at a low speed for 60s, then pouring desulfurized gypsum into the stirring pot B, stirring at a low speed for 60s, pouring a gypsum retarder into the stirring pot B, stirring at a low speed for 30s, and finally pouring a water reducing agent into the stirring pot B, and stirring at a low speed for 30 s;
step 5: ending Step3 and Step4 at the same time, pouring the materials in the stirring pot A into the stirring pot B, and continuing stirring at a low speed for 30 s;
step 6: pouring the fibers and a proper amount of water into the stirring pot C at the same time, stirring at a low speed for 30s, then pouring the building instant rubber powder into the stirring pot C, and stirring at a low speed for 30s to uniformly disperse the building instant rubber powder in the water;
step 7: and (5) finishing Step5 and Step6 at the same time, pouring the materials in the stirring pot C into the stirring pot B, then pouring the defoaming agent into the stirring pot B, firstly stirring at a low speed for 60s, then stirring at a high speed for 30s, pouring the materials in the stirring pot B into a mold after stirring is finished, vibrating for molding, and naturally curing.
The invention has the advantages that:
(1) the EPS particles are doped into the desulfurized gypsum-based heat-insulation wall body, so that the gypsum board becomes lighter due to the doping of the EPS particles, the EPS particles have a heat-insulation effect, and the heat-insulation performance of the gypsum board is improved.
(2) The calcined desulfurized gypsum, aluminate cement and ordinary silicate cement are used as main materials, and the flash setting performance of the aluminate and ordinary silicate after being blended is utilized, so that the initial setting time of the gypsum and the initial setting time of the cement are matched, the water resistance of the gypsum board is improved, the use field of the gypsum board is expanded, and the strength of the gypsum board is improved due to the doping of the cement.
(3) The EPS particles are subjected to modification treatment (the EPS particles are fully wrapped by the binder, so that the surfaces of the EPS particles have hydrophilicity), the EPS particles can be tightly combined with the cementing material, the phenomenon that the apparent density of the EPS particles is small and the EPS particles float upwards in gypsum slurry is improved, and the EPS particles are dispersed in the plate more uniformly.
(4) The basalt fiber has the advantage of better strength performance, and the basalt fiber is added in the preparation process to play the fiber winding effect and the connection effect on a gypsum matrix, so that the EPS particles can not float upwards due to the fiber winding and blocking effect to influence the uniform distribution of EPS in the board, and the overall improvement of the performance of the board is promoted.
(5) The admixture of the gypsum retarder, the caking agent, the water reducing agent, the building instant glue powder and the defoaming agent enables the water-glue ratio of the cementing material to reach the optimal state, and promotes the practical application of the invention in walls.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
Example 1
Weighing the main materials in percentage by mass: the cement mortar comprises desulfurized gypsum, aluminate cement and ordinary portland cement, wherein the desulfurized gypsum accounts for 65%, the aluminate cement accounts for 21.35%, and the ordinary portland cement accounts for 13.65%.
Weighing the following auxiliary materials in percentage by mass: the building waterproof coating comprises EPS particles, a gypsum retarder (citric acid), fibers (basalt fibers), a binder (polyvinyl acetate emulsion), a water reducing agent (naphthalene sulfonic acid water reducing agent), building instant rubber powder and an antifoaming agent (grease antifoaming agent), wherein the using amount of the EPS particles is 0.5% of the main material, the using amount of the citric acid is 0.08% of the main material, the using amount of the basalt fibers is 2.0% of the main material, the using amount of the polyvinyl acetate emulsion is 0.6% of the main material, the using amount of the naphthalene sulfonic acid water reducing agent is 0.25% of the main material, the using amount of the building instant rubber powder is 0.6% of the main material, and the using amount of the grease antifoaming agent is 0.25.
Weighing a proper amount of laboratory water by mass percent, wherein the using amount of the laboratory water is 60 percent of the main material.
Desulfurized gypsum: the industrial residue from the Xinjiang stone river Tianzitian thermal power plant is prepared by putting the industrial residue into a resistance furnace, taking room temperature as initial temperature, raising the temperature to 350 ℃ at the speed of 11 ℃/min, calcining for 3h, naturally cooling and screening. The performance of the desulfurized gypsum generated by coal thermal power generation is approximately consistent with that of natural gypsum, and the desulfurized gypsum is used for replacing the natural gypsum, so that the performance of the gypsum board is not influenced, and the waste of land resources is reduced (a large amount of desulfurized gypsum occupies the land resources).
Aluminate cement, ordinary portland cement: the self-strength is high, and when the material is mixed with other materials, the material can be well blended with other materials, and the self-strength is further improved.
The basalt fiber has the advantages of high strength, high toughness, high temperature resistance, small shrinkage, non-combustibility, non-toxicity, low carbon, environmental protection and the like, and is harmless to the environment and health.
The EPS particles are light high-molecular polymers, and after the EPS particles are added into a wall body, the EPS particles occupy a larger proportion of a gypsum matrix, the mass of the gypsum is reduced, and the upward floating of the EPS particles is inhibited and the strength performance is improved due to the winding connection effect of fibers, so that the apparent density of a gypsum board is obviously reduced, a light and high-strength desulfurized gypsum board is obtained, and in addition, the EPS particles have the heat preservation effect and also improve the heat preservation performance of the gypsum board. Meanwhile, after the desulfurized gypsum is modified by aluminate and ordinary portland cement, the water resistance of the desulfurized gypsum is improved. As most raw materials are wastes, the recycling of solid wastes is promoted, and the development requirement of green building materials is met.
Mixing polyvinyl acetate emulsion with water according to the weight ratio of 1: and 5, pouring the mixture into the stirring pot A, stirring at a low speed for 120s to fully dissolve the polyvinyl acetate emulsion and the water, then pouring the EPS particles into the stirring pot A, and stirring at a low speed for 60s to fully wrap the polyvinyl acetate around the EPS particles.
Pouring aluminate cement and ordinary portland cement into a stirring pot B, stirring at a low speed for 60s, then pouring desulfurized gypsum into the stirring pot B, stirring at a low speed for 60s, then pouring citric acid into the stirring pot B, stirring at a low speed for 30s, and finally pouring a naphthalene sulfonic acid water reducing agent into the stirring pot B, and stirring at a low speed for 30 s.
And (4) finishing the simultaneous stirring of the stirring pan A and the stirring pan B, then pouring the materials in the stirring pan A into the stirring pan B, and continuing to stir at a low speed for 30 s.
And pouring the basalt fibers and the water into the stirring pot C at the same time, stirring at a low speed for 30s, then pouring the building instant rubber powder into the stirring pot C, and stirring at a low speed for 30s to uniformly disperse the building instant rubber powder in the water.
And finishing the simultaneous stirring of the stirring pan C and the stirring pan B (the materials in the stirring pan A and the stirring pan B are mixed), then pouring the materials in the stirring pan C into the stirring pan B, then pouring the grease defoaming agent into the stirring pan B, firstly stirring at a low speed for 60s, then stirring at a high speed for 30s, pouring the materials in the stirring pan B into a mould of 40mm multiplied by 160mm after the stirring is finished, then performing vibration molding, and finally naturally curing for 7d under laboratory conditions.
The mechanical properties of the prepared wall board are tested according to GB/T17669.3-1999 building gypsum mechanical property measurement, and the measured results are shown in Table 1.
TABLE 1 desulfurized gypsum based EPS particle wall board mechanical property technical parameter
| Item | Apparent density | Flexural strength | Compressive strength |
| Parameter(s) | 1.22g/cm3 | 4.91MPa | 8.06MPa |
Example 2
Weighing the main materials in percentage by mass: the cement mortar comprises desulfurized gypsum, aluminate cement and ordinary portland cement, wherein the desulfurized gypsum accounts for 75%, the aluminate cement accounts for 15.25%, and the ordinary portland cement accounts for 9.75%.
Weighing the following auxiliary materials in percentage by mass: the building waterproof coating comprises EPS particles, a gypsum retarder (citric acid), fibers (basalt fibers), a binder (polyvinyl acetate emulsion), a water reducing agent (naphthalene sulfonic acid water reducing agent), building instant glue powder and an antifoaming agent (grease antifoaming agent), wherein the using amount of the EPS particles is 0.35% of the main material, the using amount of the citric acid is 0.08% of the main material, the using amount of the basalt fibers is 1.2% of the main material, the using amount of the polyvinyl acetate emulsion is 0.4% of the main material, the using amount of the naphthalene sulfonic acid water reducing agent is 0.15% of the main material, the using amount of the building instant glue powder is 0.35% of the main material, and the using amount of the grease antifoaming agent is 0.15.
Weighing a proper amount of laboratory water by mass percent, wherein the using amount of the laboratory water is 60 percent of the main material.
The wall panels were produced in the same manner as in example 1, and were also cured naturally under laboratory conditions for 7 d.
The mechanical properties of the wall board obtained were measured in the same manner as in example 1, and the results are shown in table 2.
TABLE 2 mechanical Properties of desulfurized gypsum based EPS particle wall board
| Item | Apparent density | Flexural strength | Compressive strength |
| Parameter(s) | 1.18g/cm3 | 4.00MPa | 8.97MPa |
Example 3
Weighing the main materials in percentage by mass: the cement mortar comprises desulfurized gypsum, aluminate cement and ordinary portland cement, wherein the desulfurized gypsum accounts for 80%, the aluminate cement accounts for 12.2%, and the ordinary portland cement accounts for 7.8%.
Weighing the following auxiliary materials in percentage by mass: the building waterproof coating comprises EPS particles, a gypsum retarder (citric acid), fibers (basalt fibers), a binder (polyvinyl acetate emulsion), a water reducing agent (naphthalene sulfonic acid water reducing agent), building instant glue powder and an antifoaming agent (grease antifoaming agent), wherein the using amount of the EPS particles is 0.3% of the main material, the using amount of the citric acid is 0.08% of the main material, the using amount of the basalt fibers is 0.8% of the main material, the using amount of the polyvinyl acetate emulsion is 0.3% of the main material, the using amount of the naphthalene sulfonic acid water reducing agent is 0.1% of the main material, the using amount of the building instant glue powder is 0.2% of the main material, and the using amount of the grease antifoaming agent is 0.1.
Weighing a proper amount of laboratory water by mass percent, wherein the using amount of the laboratory water is 60 percent of the main material.
The wall panels were produced in the same manner as in example 1, and were also cured naturally under laboratory conditions for 7 d.
The mechanical properties of the wall board obtained were measured in the same manner as in example 1, and the results are shown in table 3.
TABLE 3 mechanical Properties of desulfurized gypsum based EPS particle wall board
| Item | Apparent density | Flexural strength | Compressive strength |
| Parameter(s) | 1.19g/cm3 | 4.68MPa | 10.28MPa |
As can be seen from the parameters given in tables 1, 2 and 3, compared with the existing gypsum wall, the wall board prepared by the formula and the method provided by the invention has greatly increased compressive strength and flexural strength and obviously reduced apparent density, so the wall board has the characteristics of light weight, high strength, water resistance and excellent heat insulation performance.
In addition, in the formula provided by the invention, the industrial waste residue-desulfurized gypsum and the domestic solid waste-EPS particles are used as raw materials, so that the recycling of the industrial waste is realized, the environment is protected, and the land resource is saved.
In conclusion, the wall body plate prepared by the formula and the method provided by the invention is a wall body material with high compressive strength, high flexural strength and excellent thermal insulation performance, and has more perfect functions, wider application and better development prospect.
It should be noted that the above-mentioned embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the protection scope of the present invention.
Claims (10)
1. The desulfurized gypsum based EPS particle heat-insulation wall is characterized by being prepared from main materials, auxiliary materials and a proper amount of water, wherein the mass percentages are as follows:
the main material consists of desulfurized gypsum, aluminate cement and ordinary portland cement, wherein the desulfurized gypsum accounts for 65-85 percent, and the balance is the aluminate cement and the ordinary portland cement;
the auxiliary materials comprise EPS particles, gypsum retarder, fibers, binder, water reducer, building instant rubber powder and defoamer, wherein the using amount of the EPS particles is 0.2-0.5% of the main material, the using amount of the gypsum retarder is 0.05-0.12% of the main material, the using amount of the fibers is 0.3-2.0% of the main material, the using amount of the binder is 0.1-0.6% of the main material, the using amount of the water reducer is 0.01-0.25% of the main material, the using amount of the building instant rubber powder is 0.05-0.6% of the main material, and the using amount of the defoamer is 0.02-0.25% of the main material.
2. The desulfurized gypsum based EPS particle thermal insulation wall body of claim 1, wherein the desulfurized gypsum is prepared by calcining industrial residues of a thermal power plant in a resistance furnace at room temperature as an initial temperature and at a speed of 11 ℃/min to 350 ℃ for 3h, naturally cooling and screening.
3. The desulfurized gypsum based EPS particle thermal insulation wall body of claim 1, wherein the ratio of the aluminate cement to the ordinary portland cement is 61: 39.
4. The desulfurized gypsum based EPS particle thermal insulation wall of claim 3, wherein the water cement ratio is 0.6.
5. The desulfurized gypsum based EPS particle thermal insulation wall of claim 1, wherein said gypsum retarder is citric acid.
6. The desulfurized gypsum based EPS particle thermal insulation wall of claim 1, wherein said fibers are basalt fibers.
7. The desulfurized gypsum based EPS particle thermal insulation wall of claim 1, wherein said binder is a polyvinyl acetate emulsion.
8. The desulfurized gypsum based EPS particle thermal insulation wall body of claim 1, wherein said water reducing agent is a naphthalene sulfonic acid water reducing agent.
9. The desulfurized gypsum based EPS particle thermal insulation wall body of claim 1, wherein the defoaming agent is an oil defoaming agent.
10. A process for the preparation of a desulphated gypsum based EPS granulate thermal insulation wall according to any one of claims 1 to 9, characterised in that it comprises the following steps:
step 1: weighing the raw materials according to a formula;
step 2: mixing the binder and water according to the ratio of 1: 5-10, and stirring at low speed for 120s to dissolve the binder and water;
step 3: pouring the EPS particles into a stirring pot A, and stirring at a low speed for 60s to fully wrap the binder around the EPS particles;
step 4: pouring aluminate cement and ordinary portland cement into a stirring pot B, stirring at a low speed for 60s, then pouring desulfurized gypsum into the stirring pot B, stirring at a low speed for 60s, pouring a gypsum retarder into the stirring pot B, stirring at a low speed for 30s, and finally pouring a water reducing agent into the stirring pot B, and stirring at a low speed for 30 s;
step 5: ending Step3 and Step4 at the same time, pouring the materials in the stirring pot A into the stirring pot B, and continuing stirring at a low speed for 30 s;
step 6: pouring the fibers and a proper amount of water into the stirring pot C at the same time, stirring at a low speed for 30s, then pouring the building instant rubber powder into the stirring pot C, and stirring at a low speed for 30s to uniformly disperse the building instant rubber powder in the water;
step 7: and (5) finishing Step5 and Step6 at the same time, pouring the materials in the stirring pot C into the stirring pot B, then pouring the defoaming agent into the stirring pot B, firstly stirring at a low speed for 60s, then stirring at a high speed for 30s, pouring the materials in the stirring pot B into a mold after stirring is finished, vibrating for molding, and naturally curing.
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