CN110194641B - Interface-enhanced phosphogypsum light inner wall partition board and preparation method thereof - Google Patents
Interface-enhanced phosphogypsum light inner wall partition board and preparation method thereof Download PDFInfo
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- CN110194641B CN110194641B CN201910411271.9A CN201910411271A CN110194641B CN 110194641 B CN110194641 B CN 110194641B CN 201910411271 A CN201910411271 A CN 201910411271A CN 110194641 B CN110194641 B CN 110194641B
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- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 title claims abstract description 104
- 238000005192 partition Methods 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000004568 cement Substances 0.000 claims abstract description 50
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 42
- 239000011258 core-shell material Substances 0.000 claims abstract description 32
- 229920006248 expandable polystyrene Polymers 0.000 claims abstract description 31
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims description 34
- 239000004794 expanded polystyrene Substances 0.000 claims description 29
- 239000010881 fly ash Substances 0.000 claims description 19
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims description 14
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 14
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- 229910021487 silica fume Inorganic materials 0.000 claims description 13
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 11
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 11
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 11
- 239000002002 slurry Substances 0.000 claims description 10
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000003607 modifier Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 5
- 239000010440 gypsum Substances 0.000 claims description 5
- 229910052602 gypsum Inorganic materials 0.000 claims description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 4
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 4
- 241001330002 Bambuseae Species 0.000 claims description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 4
- VJHCJDRQFCCTHL-UHFFFAOYSA-N acetic acid 2,3,4,5,6-pentahydroxyhexanal Chemical compound CC(O)=O.OCC(O)C(O)C(O)C(O)C=O VJHCJDRQFCCTHL-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 239000011425 bamboo Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims description 4
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 3
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 3
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 238000005187 foaming Methods 0.000 claims description 3
- 239000004088 foaming agent Substances 0.000 claims description 3
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 3
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 3
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 3
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 3
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 229920005990 polystyrene resin Polymers 0.000 claims description 3
- 102000004169 proteins and genes Human genes 0.000 claims description 3
- 108090000623 proteins and genes Proteins 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 150000008130 triterpenoid saponins Chemical class 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 229920003169 water-soluble polymer Polymers 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004321 preservation Methods 0.000 abstract description 4
- 238000001035 drying Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 229920005646 polycarboxylate Polymers 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000003245 working effect 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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/10—Treatment for enhancing the mixability with the mortar
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1077—Cements, e.g. waterglass
-
- 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
-
- 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
- E04B1/78—Heat insulating elements
- E04B1/80—Heat insulating elements 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention provides an interface-enhanced phosphogypsum light inner wall partition board and a preparation method thereof, wherein the interface-enhanced phosphogypsum light inner wall partition board comprises the following raw materials in parts by weight: phosphogypsum: 75-95 parts of cement: 1-5 parts of core-shell structure foamed polystyrene light aggregate: 3-8 parts of retarder: 0.3-0.5 part of water-retaining agent: 0.2-0.4 part of water reducing agent: 0.3-0.5 part of air entraining agent: 0.1 to 0.2 portion. The interface-enhanced phosphogypsum light interior wall partition board takes phosphogypsum as a main raw material and is compounded with cement, core-shell structure foamed polystyrene light aggregate, a retarder, a water-retaining agent, a water reducing agent and an air entraining agent, wherein the compatibility of the light aggregate, the phosphogypsum and the cement is enhanced and the bonding strength of the light aggregate, the phosphogypsum and the cement is improved by using the core-shell structure foamed polystyrene light aggregate, so that the heat preservation and insulation effect and the mechanical property of the interface-enhanced phosphogypsum light interior wall partition board are effectively improved.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to an interface-enhanced phosphogypsum light inner wall partition board and a preparation method thereof.
Background
Phosphogypsum is a solid waste produced in the preparation of phosphoric acid by an industrial wet method, and the average production of each ton of P2O54.5-5.5 tons of phosphogypsum can be formed. Because of the large amount of impurities (mainly phosphorus, fluorine and organic matters) in the phosphogypsum, the existence of the impurities can cause the fluctuation of the properties of the phosphogypsum, so that the performance of the phosphogypsum is unstable, thereby limiting the utilization of the phosphogypsum. According to nothingCompletely counting, the annual emission of phosphogypsum in China is more than 8000 million tons at present, the comprehensive utilization rate is less than 20 percent, and the total stockpiling quantity is more than 5 hundred million tons. Impurities such as phosphorus, fluorine and organic matters remained in the phosphogypsum can enter underground along with rainwater to pollute soil and water resources, and phosphogypsum dust raised during mechanical operation can pollute air. The comprehensive utilization of phosphogypsum as a resource has become a technical problem to be solved urgently at present. The phosphogypsum is calcined to generate semi-hydrated phosphogypsum so as to prepare the building material, which is the most common and mature technology for phosphogypsum at present.
According to the plan of Ministry of construction, the proportion of energy-saving buildings in existing residential buildings in cities and towns in 2020 is more than 60 percent, so that the development of safe, environment-friendly, efficient and energy-saving heat-insulating materials is urgent, and the development of the light internal wall partition plate of the phosphogypsum not only treats the solid waste phosphogypsum, but also well embodies the concept of building energy saving. However, in the preparation process of the phosphogypsum light inner wall partition board, the bonding performance of the interface of the light aggregate and the cementing material is poor, so that the heat insulation effect is poor and the mechanical property is low.
Disclosure of Invention
In view of the above, the invention aims to provide an interface-enhanced phosphogypsum light inner wall partition plate to solve the problems of poor heat insulation effect and low mechanical property of the existing phosphogypsum light inner wall partition plate.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the interface-enhanced phosphogypsum light inner wall partition board comprises the following raw materials in parts by weight:
phosphogypsum: 75-95 parts of (A) and (B),
cement: 1-5 parts of (A) a stabilizer,
core-shell structure foamed polystyrene lightweight aggregate: 3-8 parts of (A) a water-soluble polymer,
retarder: 0.3 to 0.5 portion of,
water-retaining agent: 0.2 to 0.4 portion of,
water reducing agent: 0.3 to 0.5 portion of,
air entraining agent: 0.1 to 0.2 portion.
Optionally, the core-shell structure expanded polystyrene lightweight aggregate comprises the following raw materials in parts by weight:
expanded polystyrene particles: 10-16 parts of (by weight),
triethanolamine: 5-6 parts of (A) a stabilizer,
ethylene-vinyl acetate: 4-6 parts of (A) a solvent,
polyvinyl alcohol: 4-5 parts of (A) a solvent,
cement: 34-39 parts of (by weight),
fly ash: 27-31 parts of (A) and (B),
silica fume: 7-8 parts of (A) a solvent,
water: 15-25 parts.
Optionally, the expanded polystyrene particles are formed by adding a foaming agent into polystyrene resin and foaming, and the particle diameter of the expanded polystyrene particles is 3-5mm, and the bulk density is 8-15kg/m3。
Optionally, the ethylene vinyl acetate has a solids content of 60%.
Optionally, the cement is portland cement; the fly ash is I-grade fly ash, and A1 in the fly ash2O3+SiO2+Fe2O388.92% in total; the particle size of the silica fume is 0.1-0.3 μm.
Optionally, the phosphogypsum is phosphogypsum hemihydrate; the weight percentage of the semi-hydrated phosphogypsum is more than 88 percent, the screen residue of a 0.2mm square-hole screen of the semi-hydrated phosphogypsum is less than 8 percent, and the flexural strength of the semi-hydrated phosphogypsum is more than 3.5MPa after 2 hours.
Optionally, the retarder is a gypsum-specific protein retarder; the water-retaining agent is one of hydroxypropyl methyl cellulose ether, hydroxyethyl cellulose ether and carboxymethyl cellulose ether.
Optionally, the water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate of the polycarboxylic acid water reducing agent is more than 20%; the air entraining agent is one or more of sodium dodecyl sulfate, triterpenoid saponin and bamboo oil.
The second purpose of the invention is to provide a method for preparing the interface-enhanced phosphogypsum light inner wall partition board, which comprises the following steps:
weighing water according to the water-cement ratio of (0.5-0.7) to 1, adding the retarder, the water-retaining agent, the water reducing agent and the air entraining agent into the water, stirring, adding the phosphogypsum, the cement and the core-shell structure foamed polystyrene light aggregate, and continuously stirring to obtain slurry A;
and forming the slurry A, and solidifying the slurry A to obtain the interface-enhanced phosphogypsum light inner wall partition plate.
Optionally, the core-shell structure expanded polystyrene lightweight aggregate is prepared by the following method:
uniformly mixing triethanolamine, ethylene-vinyl acetate and polyvinyl alcohol to obtain a surface modifier A;
spraying the surface modifier A on the surfaces of the expanded polystyrene particles, stirring, adding cement, fly ash, silica fume and water to the surface of the expanded polystyrene particles to be completely wetted, continuously stirring, and then sealing and aging to obtain the core-shell structure expanded polystyrene light aggregate.
Compared with the prior art, the interface-reinforced phosphogypsum light inner wall partition plate has the following advantages:
1. the interface-enhanced phosphogypsum light interior wall partition board takes phosphogypsum as a main raw material and is compounded with cement, core-shell structure foamed polystyrene light aggregate, a retarder, a water-retaining agent, a water reducing agent and an air entraining agent, on one hand, the use of the core-shell structure foamed polystyrene light aggregate enhances the compatibility of the light aggregate with the phosphogypsum and the cement, and improves the bonding strength of the light aggregate with the phosphogypsum and the cement, thereby effectively improving the heat preservation and insulation effects and the mechanical properties of the interface-enhanced phosphogypsum light interior wall partition board, on the other hand, the use of the retarder, the water-retaining agent, the water reducing agent, the air entraining agent and other additives also greatly improves the working properties of the interface-enhanced phosphogypsum light interior wall partition board, and further enhances the mechanical properties and the heat preservation and insulation effects of the interface-enhanced phosphogypsum light interior wall partition board. Meanwhile, the utilization rate of the phosphogypsum can reach 95 percent, the problem of resource utilization of the phosphogypsum is solved, and the phosphogypsum has remarkable social and environmental benefits.
2. The interface-enhanced phosphogypsum light inner wall partition board has the advantages of simple preparation method, mild preparation conditions and easy industrial production.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail with reference to examples.
Example 1
The interface-enhanced phosphogypsum light inner wall partition board comprises the following raw materials in parts by weight:
phosphogypsum: 80 parts of cement: 2 parts of core-shell structure expanded polystyrene lightweight aggregate: 3 parts of retarder: 0.3 part of water-retaining agent: 0.3 part of water reducing agent: 0.4 part, air entraining agent: 0.1 part.
In this embodiment, the raw materials of the core-shell structure expanded polystyrene lightweight aggregate include the following components:
expanded polystyrene particles: 10 parts, triethanolamine: 6 parts of ethylene-vinyl acetate: 4 parts, polyvinyl alcohol: 4 parts of cement: 34 parts of fly ash: 30 parts, silica fume: 7 parts of water: and 17 parts.
Wherein the expanded polystyrene particles in the core-shell structure expanded polystyrene light aggregate are prepared by adding foaming agent into polystyrene resin for foaming, the particle size is 3mm, and the bulk density is 15kg/m3(ii) a The ethylene-vinyl acetate solids content was 60%; the cement is ordinary portland cement; the fly ash is I-grade fly ash, and A1 in the fly ash2O3+SiO2+Fe2O388.92% in total; the particle size of the silica fume was 0.1. mu.m.
The core-shell structure foamed polystyrene lightweight aggregate is prepared by the following method:
mixing triethanolamine, ethylene-vinyl acetate and polyvinyl alcohol according to the proportion of the raw materials, and uniformly stirring to obtain a surface modifier A;
spraying the surface modifier A on the surface of the continuously stirred foamed polystyrene lightweight aggregate, stirring for 90s, putting the foamed polystyrene lightweight aggregate into a ball forming mill, adding cement, fly ash, silica fume and water according to the mixture ratio of the raw materials, continuously stirring for 60s, uniformly mixing, sealing and aging for 48h to obtain the foamed polystyrene lightweight aggregate with the core-shell structure.
The core-shell structure foamed polystyrene light aggregate in the embodiment takes emulsion consisting of triethanolamine, ethylene-vinyl acetate and polyvinyl alcohol as a surface modifier, and is sprayed on the surface of foamed polystyrene particles to modify the surface of the foamed polystyrene particles, so that the surface of the foamed polystyrene particles is changed from hydrophobicity to hydrophilicity, the bonding property between the foamed polystyrene particles and inorganic cementing materials such as cement, gypsum and the like is greatly improved, and when the foamed polystyrene light aggregate is used for preparing an interface-enhanced phosphogypsum light inner wall partition plate, the phenomena of floating and layering in the stirring process can be avoided, the foamed polystyrene light aggregate can be uniformly distributed in slurry, and the workability, the heat preservation and insulation effect and the mechanical property of the interface-enhanced phosphogypsum light inner wall partition plate are further greatly improved. In addition, the embodiment adopts an aging mode for treatment in the preparation process, which is beneficial to further improving the mechanical property of the core-shell structure foamed polystyrene light aggregate, and is further beneficial to further improving the mechanical property of the prepared interface-enhanced phosphogypsum light inner wall partition board.
In addition, in the embodiment, the phosphogypsum is semi-hydrated phosphogypsum, which is obtained by washing, drying, grinding, calcining and aging the phosphogypsum, and has the mass fraction of more than 88%, the screen residue of a 0.2mm square-hole sieve of less than 8% and the bending strength of more than 3.5MPa in 2 h; the retarder is a protein retarder special for gypsum; the water-retaining agent is hydroxypropyl methyl cellulose ether; the water reducing agent is a polycarboxylate water reducing agent, and the water reducing rate of the polycarboxylate water reducing agent is 22%; the air entraining agent is sodium dodecyl sulfate.
In the embodiment, the water reducing agent is added to reduce the water demand and the free water content of the phosphogypsum, cement and core-shell structure expanded polystyrene light aggregate in the interface-enhanced phosphogypsum light inner wall partition board, the later-stage mechanical strength of the system can be further improved, the shrinkage can be reduced, the water retaining agent is added to ensure the effective solidification of the water in the system, the bleeding phenomenon disappears, the workability of the system is further improved, the retarder is added to delay the hydration induction period of the phosphogypsum, the setting time is greatly prolonged, the forming is convenient, and meanwhile, a certain amount of micropores can be introduced into the system by adding the air entraining agent, so that the volume density of the product and the heat conductivity coefficient of the product are reduced, and the product has a good heat insulation effect.
The interface-enhanced phosphogypsum light inner wall partition plate is prepared by the following method:
weighing water according to a water-cement ratio of 0.5: 1, adding the water into a stirrer, adding a retarder, a water-retaining agent, a water-reducing agent and an air-entraining agent into the stirrer according to the mixture ratio of the raw materials, stirring for 1-2min, adding phosphogypsum, cement and core-shell structure foamed polystyrene light aggregate, and continuously stirring for 2-3min to obtain slurry A, wherein the water-cement ratio refers to the ratio of the water usage to the total usage of the phosphogypsum and the cement, the total usage of the phosphogypsum and the cement in the interface-enhanced phosphogypsum light inner wall partition board is 82 parts, and 41 parts of water is weighed according to the water-cement ratio of 0.5: 1;
and (3) quickly injecting the slurry A into a gypsum mould for forming, and removing the mould after the slurry A is solidified to obtain the interface-enhanced phosphogypsum light inner wall partition plate.
Example 2
This example differs from example 1 in that: the interface-enhanced phosphogypsum light inner wall partition plate comprises the following raw materials in percentage by weight:
phosphogypsum: 85 parts of cement: 4, core-shell structure foamed polystyrene lightweight aggregate: 6 parts of retarder: 0.4 part of water-retaining agent: 0.4 part of water reducing agent: 0.3 part, air entraining agent: 0.2 part.
The core-shell structure foamed polystyrene lightweight aggregate comprises the following raw materials:
expanded polystyrene particles: 12 parts, triethanolamine: 6 parts of ethylene-vinyl acetate: 5 parts, polyvinyl alcohol: 4 parts of cement: 36 parts of fly ash: 28 parts, silica fume: 7 parts of water: and 20 parts.
And the expanded polystyrene particles in this example had a particle diameter of 5mm and a bulk densityIs 8kg/m3。
Meanwhile, in the embodiment, the water retention agent is carboxymethyl cellulose ether.
In addition, in the preparation process of the interface-enhanced phosphogypsum light interior wall partition board in the embodiment, the adding amount of water is weighed according to the water-cement ratio of 0.7: 1, namely, in the embodiment, the total usage amount of the phosphogypsum and the cement in the interface-enhanced phosphogypsum light interior wall partition board is 89 parts, and 62.3 parts of water is weighed according to the water-cement ratio of 0.7: 1.
Example 3
This example differs from example 1 in that: the interface-enhanced phosphogypsum light inner wall partition plate comprises the following raw materials in percentage by weight:
phosphogypsum: 95 parts of cement: 4, core-shell structure foamed polystyrene lightweight aggregate: 8 parts of retarder: 0.3 part of water-retaining agent: 0.4 part of water reducing agent: 0.5 part, air entraining agent: 0.2 part.
The core-shell structure foamed polystyrene lightweight aggregate comprises the following raw materials:
expanded polystyrene particles: 16 parts of triethanolamine: 5 parts, ethylene-vinyl acetate: 5 parts, polyvinyl alcohol: 5 parts of cement: 39 parts of fly ash: 30 parts, silica fume: 7 parts of water: and 25 parts.
And the expanded polystyrene particles in this example had a particle diameter of 5mm and a bulk density of 8kg/m3。
Meanwhile, in the embodiment, the water retention agent is hydroxyethyl cellulose ether, and the air entraining agent is triterpenoid saponin.
In addition, in the preparation process of the interface-enhanced phosphogypsum light interior wall partition board in the embodiment, the adding amount of water is weighed according to the water-cement ratio of 0.7: 1, namely, in the embodiment, the total using amount of the phosphogypsum and the cement in the interface-enhanced phosphogypsum light interior wall partition board is 99 parts, and 69.3 parts of water is weighed according to the water-cement ratio of 0.7: 1.
Example 4
This example differs from example 1 in that: the interface-enhanced phosphogypsum light inner wall partition plate comprises the following raw materials in percentage by weight:
phosphogypsum: 90 parts of cement: 2 parts of core-shell structure expanded polystyrene lightweight aggregate: 8 parts of retarder: 0.3 part of water-retaining agent: 0.3 part of water reducing agent: 0.5 part, air entraining agent: 0.1 part.
The core-shell structure foamed polystyrene lightweight aggregate comprises the following raw materials: expanded polystyrene particles: 13 parts, triethanolamine: 4 parts of ethylene-vinyl acetate: 5 parts, polyvinyl alcohol: 4 parts of cement: 35 parts of fly ash: 30 parts, silica fume: 8 parts of water: 22 parts of.
And the expanded polystyrene particles in this example had a particle diameter of 4mm and a bulk density of 12kg/m3。
Meanwhile, the air entraining agent in the embodiment is bamboo grease.
In addition, in the preparation process of the interface-enhanced phosphogypsum light interior wall partition board in the embodiment, the addition amount of water is weighed according to the water-cement ratio of 0.6: 1, namely, in the embodiment, the total usage amount of the phosphogypsum and the cement in the interface-enhanced phosphogypsum light interior wall partition board is 92 parts, and 55.2 parts of water is weighed according to the water-cement ratio of 0.6: 1.
Example 5
This example differs from example 1 in that: the interface-enhanced phosphogypsum light inner wall partition plate comprises the following raw materials in percentage by weight:
phosphogypsum: 95 parts of cement: 5 parts of core-shell structure foamed polystyrene lightweight aggregate: 6 parts of retarder: 0.3 part of water-retaining agent: 0.4 part of water reducing agent: 0.5 part, air entraining agent: 0.1 part.
The core-shell structure foamed polystyrene lightweight aggregate comprises the following raw materials:
expanded polystyrene particles: 10 parts, triethanolamine: 5 parts, ethylene-vinyl acetate: 5 parts, polyvinyl alcohol: 4 parts of cement: 34 parts of fly ash: 27 parts, silica fume: 7 parts of water: and 20 parts.
And the expanded polystyrene particles in this example had a particle diameter of 4mm and a bulk density of 12kg/m3。
Meanwhile, in the embodiment, the water retention agent is carboxymethyl cellulose ether, and the air entraining agent is bamboo grease.
In the embodiment, the total usage amount of the phosphogypsum and the cement in the interface-enhanced phosphogypsum light inner wall partition board is 100 parts, so 50 parts of water are required to be weighed according to the water-cement ratio of 0.5: 1 in the preparation process of the interface-enhanced phosphogypsum light inner wall partition board.
The performance of the interface reinforced phosphogypsum light inner wall partition board of the embodiment 1-embodiment 5 of the invention is tested, and the test result is shown in table 1.
As can be seen from Table 1, the interface-enhanced phosphogypsum light inner wall partition in the embodiments 1 to 5 of the invention has good heat insulation performance, the heat conductivity coefficient is 0.12 to 0.17W/(m.K), the density is low, and the absolute dry density is 573-3The mechanical strength is high, the absolute dry compressive strength is 3.2-6.0MPa, the drying shrinkage value is smaller, and the drying shrinkage value is 0.13-0.15 mm/m.
TABLE 1
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The interface-enhanced phosphogypsum light inner wall partition board is characterized by comprising the following raw materials in parts by weight:
phosphogypsum: 75-95 parts of (A) and (B),
cement: 1-5 parts of (A) a stabilizer,
core-shell structure foamed polystyrene lightweight aggregate: 3-8 parts of (A) a water-soluble polymer,
retarder: 0.3 to 0.5 portion of,
water-retaining agent: 0.2 to 0.4 portion of,
water reducing agent: 0.3 to 0.5 portion of,
air entraining agent: 0.1-0.2 parts;
the core-shell structure foamed polystyrene lightweight aggregate comprises the following raw materials:
expanded polystyrene particles: 10-16 parts of (by weight),
triethanolamine: 5-6 parts of (A) a stabilizer,
ethylene-vinyl acetate: 4-6 parts of (A) a solvent,
polyvinyl alcohol: 4-5 parts of (A) a solvent,
cement: 34-39 parts of (by weight),
fly ash: 27-31 parts of (A) and (B),
silica fume: 7-8 parts of (A) a solvent,
water: 15-25 parts;
the core-shell structure foamed polystyrene lightweight aggregate is prepared by the following method:
uniformly mixing triethanolamine, ethylene-vinyl acetate and polyvinyl alcohol to obtain a surface modifier A;
spraying the surface modifier A on the surfaces of the expanded polystyrene particles, stirring, adding cement, fly ash, silica fume and water to the surface of the expanded polystyrene particles to be completely wetted, continuously stirring, and then sealing and aging to obtain the core-shell structure expanded polystyrene light aggregate;
the cement is ordinary portland cement; the fly ash is I-grade fly ash, and A1 in the fly ash2O3+SiO2+Fe2O388.92% in total; the particle size of the silica fume is 0.1-0.3 mu m;
the phosphogypsum is semi-hydrated phosphogypsum; the weight percentage of the semi-hydrated phosphogypsum is more than 88 percent, the screen residue of a 0.2mm square-hole screen of the semi-hydrated phosphogypsum is less than 8 percent, and the flexural strength of the semi-hydrated phosphogypsum is more than 3.5MPa after 2 hours.
2. The interface-enhanced phosphogypsum light-weight inner wall partition board according to claim 1, wherein the expanded polystyrene particles are formed by adding a foaming agent into polystyrene resin and foaming, the particle size of the expanded polystyrene particles is 3-5mm, and the bulk density is 8-15kg/m3。
3. The interface-reinforced phosphogypsum light-weight interior wall partition board according to claim 1, characterized in that the ethylene-vinyl acetate solids content is 60%.
4. The interface-reinforced phosphogypsum light-weight interior wall partition board according to claim 1, characterized in that the retarder is a gypsum-specific protein retarder; the water-retaining agent is one of hydroxypropyl methyl cellulose ether, hydroxyethyl cellulose ether and carboxymethyl cellulose ether.
5. The interface-enhanced phosphogypsum light-weight inner wall partition board according to claim 1, characterized in that the water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate of the polycarboxylic acid water reducing agent is more than 20%; the air entraining agent is one or more of sodium dodecyl sulfate, triterpenoid saponin and bamboo oil.
6. A method for preparing the interface-reinforced phosphogypsum light-weight interior wall partition board of any one of claims 1 to 5, characterized by comprising the following steps:
weighing water according to the water-cement ratio of (0.5-0.7) to 1, adding the retarder, the water-retaining agent, the water reducing agent and the air entraining agent into the water, stirring, adding the phosphogypsum, the cement and the core-shell structure foamed polystyrene light aggregate, and continuously stirring to obtain slurry A;
and forming the slurry A, and solidifying the slurry A to obtain the interface-enhanced phosphogypsum light inner wall partition plate.
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