CN115159946A - High-strength gypsum-based sand-free self-leveling mortar with high fluidity and preparation method and application thereof - Google Patents
High-strength gypsum-based sand-free self-leveling mortar with high fluidity and preparation method and application thereof Download PDFInfo
- Publication number
- CN115159946A CN115159946A CN202210842456.7A CN202210842456A CN115159946A CN 115159946 A CN115159946 A CN 115159946A CN 202210842456 A CN202210842456 A CN 202210842456A CN 115159946 A CN115159946 A CN 115159946A
- Authority
- CN
- China
- Prior art keywords
- gypsum
- strength
- parts
- sand
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010440 gypsum Substances 0.000 title claims abstract description 176
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 176
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 123
- 238000002360 preparation method Methods 0.000 title claims description 26
- 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 77
- 239000000843 powder Substances 0.000 claims abstract description 73
- 239000002994 raw material Substances 0.000 claims abstract description 45
- 238000010276 construction Methods 0.000 claims abstract description 38
- 239000000654 additive Substances 0.000 claims abstract description 37
- 230000000996 additive effect Effects 0.000 claims abstract description 35
- 239000000945 filler Substances 0.000 claims abstract description 35
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000011574 phosphorus Substances 0.000 claims abstract description 11
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 239000003795 chemical substances by application Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 21
- 239000003638 chemical reducing agent Substances 0.000 claims description 15
- 239000002518 antifoaming agent Substances 0.000 claims description 14
- 150000004683 dihydrates Chemical class 0.000 claims description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 10
- 239000011575 calcium Substances 0.000 claims description 10
- 229910052791 calcium Inorganic materials 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 239000012744 reinforcing agent Substances 0.000 claims description 10
- 239000003381 stabilizer Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 239000000375 suspending agent Substances 0.000 claims description 10
- 239000010881 fly ash Substances 0.000 claims description 9
- 239000002956 ash Substances 0.000 claims description 8
- 150000001669 calcium Chemical class 0.000 claims description 8
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical class O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 8
- 239000010453 quartz Substances 0.000 claims description 8
- 239000011863 silicon-based powder Substances 0.000 claims description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 4
- 229920005646 polycarboxylate Polymers 0.000 claims description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- 229920002545 silicone oil Polymers 0.000 claims description 3
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 2
- 229920003086 cellulose ether Polymers 0.000 claims description 2
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 2
- 229920002401 polyacrylamide Polymers 0.000 claims description 2
- 239000004576 sand Substances 0.000 abstract description 46
- 230000008901 benefit Effects 0.000 abstract description 15
- 238000005336 cracking Methods 0.000 abstract description 8
- 238000007667 floating Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 230000000630 rising effect Effects 0.000 abstract 2
- 239000002245 particle Substances 0.000 description 24
- 239000000463 material Substances 0.000 description 14
- 238000002156 mixing Methods 0.000 description 11
- 239000000047 product Substances 0.000 description 10
- 239000004568 cement Substances 0.000 description 9
- 235000012239 silicon dioxide Nutrition 0.000 description 9
- 239000004575 stone Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 6
- 239000012615 aggregate Substances 0.000 description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 239000013530 defoamer Substances 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002367 phosphate rock Substances 0.000 description 3
- 230000003449 preventive effect Effects 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 2
- 229920002522 Wood fibre Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- HDERJYVLTPVNRI-UHFFFAOYSA-N ethene;ethenyl acetate Chemical group C=C.CC(=O)OC=C HDERJYVLTPVNRI-UHFFFAOYSA-N 0.000 description 2
- 229920001038 ethylene copolymer Polymers 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 2
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 2
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 2
- 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 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 2
- 239000002025 wood fiber Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 108010082495 Dietary Plant Proteins Proteins 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- ZOYQVVVFGFZXLB-UHFFFAOYSA-N [K].[Mg].[Ca].[Si] Chemical compound [K].[Mg].[Ca].[Si] ZOYQVVVFGFZXLB-UHFFFAOYSA-N 0.000 description 1
- LWNCNSOPVUCKJL-UHFFFAOYSA-N [Mg].[P] Chemical compound [Mg].[P] LWNCNSOPVUCKJL-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M acrylate group Chemical group C(C=C)(=O)[O-] NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000011426 gypsum mortar Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002686 phosphate fertilizer Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 239000002023 wood Substances 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
- C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09D131/04—Homopolymers or copolymers of vinyl acetate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/12—Mortar-bound paving
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring materials
- C04B2111/62—Self-levelling compositions
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses high-strength gypsum-based sand-free self-leveling mortar with strong fluidity, which is prepared from the following raw materials in parts by weight: the feed is prepared from the following raw materials in parts by weight: 400-920 parts of phosphogypsum powder, 80-600 parts of modified filler and 5-12 parts of additive; the phosphogypsum powder is one of phosphorus building gypsum powder, mixed phase gypsum and alpha-type high-strength gypsum. The high-strength gypsum-based sand-free self-leveling mortar has the advantages of good flowing performance, low cost, capability of fully playing the advantages of sand-free mortar self-leveling and sand self-leveling, capability of achieving the effects of less cracking, hollowing, sand rising, black floating and high strength of the sand self-leveling mortar, and capability of having the advantages of good flowing performance and low cost of the sand-free self-leveling mortar in construction, and the high-strength self-leveling mortar has the advantages of no cracking, no hollowing, no sand rising, no black floating, strong bonding force and high strength after being constructed by the mortar.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to high-strength gypsum-based sand-free self-leveling mortar with high fluidity, and a preparation method and application thereof.
Background
The main component of phosphogypsum is dihydrate gypsum (CaSO) 4 ·2H 2 O), the particle diameter is generally 5-50 μm, the water of crystallization content is 20% -25%, the solid by-product produced in the wet-process phosphoric acid production process is the waste for preparing phosphate fertilizer, and 4-5 tons of phosphogypsum can be produced per 1 ton of phosphorus pentoxide. The composition of the phosphogypsum is complex, besides calcium sulfate, incompletely decomposed phosphorite, residual phosphoric acid, fluoride, acid insoluble substances, organic matters and the like exist, and the existence of fluorine and the organic matters has the greatest influence on the resource utilization of the phosphogypsum. The annual discharge amount of phosphogypsum in China exceeds 7500 million tons, the resource utilization rate is less than 50 percent, the random discharge and accumulation of the phosphogypsum not only occupies land resources, but also seriously destroys the ecological environment, and impurities such as phosphorus, fluorine and the like in the phosphogypsum can enter soil along with the washing of rainwater, thereby polluting the soil and underground water. The phosphogypsum can be used as a building material, and opens up a road for the comprehensive application of the phosphogypsum.
Comprehensive application of phosphogypsum is very common, the resource utilization approach of the phosphogypsum at present is mainly used for producing various products such as building gypsum powder, gypsum mortar, building wallboard and batten, cement retarder, cement, silicon-calcium-potassium-magnesium fertilizer and the like, and because the added values of the products are lower and limited by the transportation radius, the market coverage area of the products is limited, and the utilization amount of the phosphogypsum is limited.
The gypsum-based self-leveling mortar originates from Europe in the sixties of the twentieth century, and in order to solve the corrosion phenomenon of cement concrete to a copper pipe in a floor heating system, the Europe starts to adopt gypsum-based floor materials and polyethylene pipes, the floor heating technology in Europe and America is very mature in the 20 th century and the 80 th century, and gypsum enterprises in the later period of the 80 th century have made the specification of the gypsum-based self-leveling mortar for floor heating application. The gypsum-based self-leveling mortar is researched at the end of the eighties of the twentieth century in China, the gypsum-based self-leveling mortar is developed successfully in 1986 by adopting the fluorine gypsum waste residues as the cementing materials, but the performance is poor, and the strength of the materials is improved by adopting the additives to meet the corresponding performance requirements, but the cost of the additives accounts for 2/3 of the production cost of the self-leveling mortar, so that the promotion of the gypsum-based self-leveling mortar in China is seriously hindered, and the international gap is large. With the development of the industry in China, the number of phosphorus chemical enterprises in China is increased, hundreds of millions of tons of industrial by-products phosphogypsum are generated, and the influence on the environment is extremely serious, so that the treatment of the phosphogypsum is not slow.
A self-leveling gypsum-base mortar is a new type of building material, which is a ground material that is made up of semi-hydrated or anhydrous gypsum as main cementing material, fine aggregate, filler and additive through stirring with water and levelling. The self-leveling floor material has good fluidity and stability, is a floor material for automatically leveling the floor, does not need to be leveled by external force, has high early strength, high construction speed and low labor intensity, and is an important development direction for the floor construction of modern buildings. At present, some manufacturers have started to produce phosphogypsum-based self-leveling products from phosphogypsum, for example:
1. patent application CN202110485544.1 discloses a high wear-resistant gypsum-based self-leveling mortar and a preparation method thereof, wherein the high wear-resistant gypsum-based self-leveling mortar comprises the following raw materials in proportion: 100 portions of desulfurized building gypsum, 20 to 25 portions of modified reinforcing material, 80 to 100 portions of aggregate, 2 to 3 portions of rubber powder, 0.3 to 0.4 portion of retarder, 0.3 to 0.4 portion of water reducing agent, 0.2 to 0.3 portion of defoaming agent, 0.1 to 0.2 portion of water-retaining agent and 35 to 50 portions of water. The preparation method specifically comprises the following steps: grinding the aggregate and 50 parts of desulfurized building gypsum into grinding materials; premixing rubber powder, retarder, water reducer, defoaming agent and water-retaining agent to obtain a mixture; and mixing the modified reinforcing material, 50 parts of desulfurized building gypsum, the grinding material and the mixture, and then adding water and stirring to obtain the high-wear-resistance gypsum-based self-leveling mortar. The gypsum-based self-leveling mortar in the method has the advantages of good fluidity, high early and later strength, no shrinkage crack due to micro-expansion, strong adhesion with a substrate and the like, and has good wear resistance.
2. Patent application cn202010741616.X discloses a phosphogypsum-based self-leveling mortar consisting of the following raw materials: 30 to 50 parts of alpha type high-strength gypsum, 0 to 20 parts of building gypsum powder, 5 to 15 parts of machine-made sand, 35 to 45 parts of phosphorite tailing slag, 1 to 5 parts of fly ash, 0.1 to 0.5 part of cement, 0.1 to 0.2 part of water reducing agent, 0.05 to 0.1 part of water retaining agent, 0.05 to 0.1 part of defoaming agent and 0.05 to 0.1 part of redispersible latex powder. According to the phosphogypsum-based self-leveling mortar, the large amount of industrial solid wastes, namely phosphogypsum and phosphate rock tailing slag, are used as the main cementing material and the aggregate, so that the resource and valuable utilization of the solid wastes are realized, the pollution of the solid wastes to soil and water resources is reduced, land resources are saved, and the comprehensive cost of self-leveling is reduced. The fluidity is good, the better embodiment of the method has better fluidity under the water-cement ratio of about 1; the dried composite material has the breaking strength of more than 8Mpa, the compressive strength of more than 30Mpa and good fire-resistant and heat-insulating properties.
3. Patent application CN202010698520.X discloses a sand-free gypsum-based self-leveling mortar, which comprises water and the following components in parts by weight: 80-97 parts of semi-hydrated phosphogypsum; 3-20 parts of alkaline substances; 0.1-2 parts of excitant; 0.35 to 0.95 portion of additive. The method uses the semi-hydrated phosphogypsum as a byproduct of the semi-hydrated phosphoric acid process to prepare the gypsum-based self-leveling mortar, only needs to dry the semi-hydrated gypsum and remove free water and a small amount of crystal water, greatly reduces energy consumption and has strong cost advantage. According to the method, the semi-hydrated phosphogypsum, the cement, the exciting agent and the additive are mixed according to a certain proportion to prepare the self-leveling gypsum product, and the self-leveling gypsum product is high in strength, good in water resistance and good in fluidity, so that the strength and fluidity of the product are further improved without adding aggregates. According to the method, the semi-hydrated phosphogypsum is used for replacing building gypsum and high-strength gypsum to prepare the gypsum-based self-leveling mortar, so that the phosphogypsum value is effectively developed and utilized.
4. Patent application CN202010871846.8 discloses a beta phosphogypsum-based self-leveling mortar, which comprises the following raw materials in parts by weight: 55 to 62 parts of beta-semi-hydrated phosphogypsum powder, 1 to 3 parts of silicate white cement, 35 to 40 parts of quartz sand, 0.15 to 0.25 part of organic silicon waterproof agent, 0.3 to 0 part of latex powder, 8 parts of water reducing agent, 0.2 to 0.4 part of water reducing agent, 0.15 to 0.3 part of defoaming agent, 0.1 to 0.25 part of vegetable protein retarder and 0.1 to 0.3 part of cellulose with the viscosity of more than 20 ten thousand units. The preparation method comprises the following steps: 1. preparing raw materials in parts by weight; 2. mixing beta-semi-hydrated phosphogypsum powder, silicate white cement and quartz sand to obtain a mixture, and then finely grinding the mixture to ensure that the specific surface area of the mixture is more than or equal to 650m < 2 >/kg; 3. and uniformly mixing the finely ground mixture with other raw materials to obtain the beta phosphogypsum-based self-leveling mortar. The beta phosphogypsum-based self-leveling mortar prepared by the method has the advantages of high strength, good fluidity, good construction property, good water resistance, no bubbling and layering, environmental protection, energy conservation and the like.
In the prior art, phosphogypsum-based self-leveling mortar is divided into two types of sand-free self-leveling mortar and sand-containing self-leveling mortar, wherein the sand-free self-leveling mortar is generally compounded by gypsum powder, a filler and an additive, and the sand-containing self-leveling mortar is generally compounded by gypsum powder, a filler, an additive and fine sand. The construction cost of the sand-free self-leveling mortar is lower than that of the sand-free self-leveling mortar, but the phenomena of hollowing, cracking, surface sanding and black floating (floating and surface of impurities such as gypsum powder organic matters and the like) are easy to occur, and the preparation of products with the strength of more than 20MPa is not suitable; compared with the sand-free self-leveling mortar, the sand-containing self-leveling mortar is suitable for preparing products with the strength of more than 20MPa, but has higher construction cost, poorer construction flowability and the like. Most of the prior documents of the self-leveling mortar disclosed above and other prior documents contain sand self-leveling mortar, and the prepared self-leveling mortar has poor fluidity and workability, and is easy to crack, bulge, sand, black and the like, so that the compressive strength is low. Although patent application cn202010698520.X discloses a sand-free gypsum-based self-leveling mortar, sand still needs to be added to improve the hardness of the self-leveling gypsum product in the construction, which can not avoid the problem of the existing sand-gypsum-based self-leveling mortar and increase the cost.
Disclosure of Invention
The invention provides high-strength gypsum-based sand-free self-leveling mortar with high fluidity, and a preparation method and application thereof, aiming at solving the technical problems. The high-strength gypsum-based sand-free self-leveling mortar disclosed by the invention can achieve the effects of difficult cracking, hollowing, sanding, "black floating" and high strength of the sand-free self-leveling mortar, and can also meet the advantages of good construction flow performance and low cost of the sand-free self-leveling mortar. The invention provides the self-leveling mortar with good fluidity and low cost while effectively utilizing the phosphogypsum, thereby changing waste into valuable, saving energy and protecting environment.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the high-strength gypsum-based sand-free self-leveling mortar with high fluidity is prepared from the following raw materials in parts by weight: 400-920 parts of phosphogypsum powder, 80-600 parts of modified filler and 5-12 parts of additive; the phosphogypsum powder is one of phosphorus building gypsum powder, mixed phase gypsum and alpha-type high-strength gypsum.
Further, the phosphorus building gypsum powder is produced by washing and modifying phosphogypsum and calcining the phosphogypsum at a low temperature of 110-170 ℃, and is prepared from the following raw materials in percentage by weight: the content of beta-type semi-hydrated gypsum (HH) is more than or equal to 75 percent, the content of dihydrate gypsum (DH) is less than or equal to 5 percent, the content of anhydrous III-type gypsum (AIII) is less than or equal to 15 percent, the initial setting time of the phosphorous building gypsum powder is more than or equal to 4.5min, the final setting time is less than or equal to 12min, and the flexural strength and the compressive strength of 2h reach more than 2.8MPa and 5.6MPa respectively.
Further, the mixed phase gypsum is prepared from the following raw materials in percentage by weight: the content of anhydrous III type (AIII) gypsum is less than or equal to 5 percent, the content of anhydrous II type (AII) gypsum is more than or equal to 20 percent, the content of beta type semi-hydrated gypsum (HH) is more than or equal to 60 percent, the content of dihydrate gypsum (DH) is less than or equal to 5 percent, the initial setting time of the mixed phase gypsum is more than or equal to 10min, the final setting time is less than or equal to 120min, the flexural and compressive strengths of 2h and more than 6.0MPa respectively, and the flexural and compressive strengths of 28d and more than 4.0MPa and 15.0MPa respectively.
Further, the alpha-type high-strength gypsum is prepared from the following raw materials in percentage by weight: the content of alpha-type semi-hydrated gypsum (HH) is more than or equal to 75 percent, the content of dihydrate gypsum (DH) is less than or equal to 5 percent, the initial setting time of the alpha-type high-strength gypsum is more than or equal to 15min, the final setting time is less than or equal to 40min, the 2h flexural strength reaches more than 5.0MPa, and the drying compressive strength is more than 45.0 MPa.
Further, the modified filler is prepared from the following raw materials in parts by weight: 5 to 20 portions of activated calcium powder, 5 to 20 portions of activated quartz powder, 5 to 10 portions of modified talcum powder, 20 to 30 portions of ash calcium, 10 to 30 portions of superfine modified fly ash and 3 to 10 portions of superfine silicon powder.
Further, the additive is prepared from the following raw materials in parts by weight: 2 to 7 portions of water reducing agent, 1 to 3 portions of retarder, 0.2 to 1.0 portion of defoamer, 0.2 to 0.6 portion of stabilizer, 0.1 to 0.5 portion of suspending agent, 0.8 to 2.5 portions of water-retaining agent and 0.3 to 1.0 portion of reinforcing agent; the water reducing agent is modified polycarboxylate ether, the retarder is inorganic salt substance, the defoaming agent is polyether modified silicone oil, the stabilizer is polyacrylamide substance, the suspending agent is polycarboxylate substance, the water retaining agent is cellulose ether, and the reinforcing agent is silicon steel element.
Furthermore, the high-strength gypsum-based sand-free self-leveling mortar has high fluidity, can be poured into a sandstone layer by virtue of the self-fluidity in the construction process, and forms a leveling layer after the surface self-leveling, the 1d compressive strength of the construction is up to more than 10.0MPa, the 14d compressive strength is up to more than 20.0MPa, the softening coefficient is up to more than 0.7, and the impermeability is up to more than P4.0.
Further, the preparation method of the high-strength gypsum-based sand-free self-leveling mortar with strong fluidity is prepared by uniformly mixing the phosphogypsum powder, the modified filler and the additive according to the weight part ratio.
Further, the high-strength gypsum-based sand-free self-leveling mortar with high fluidity is applied to preparation of gypsum-based sand-free self-leveling mortar floors.
A construction method of pouring type phosphogypsum-based sand-free self-leveling mortar comprises the following steps:
(1) Preparing the pouring type phosphogypsum-based sand-free self-leveling mortar: uniformly mixing the phosphogypsum powder, the modified filler and the additive, and conveying to a construction site;
(2) Cleaning the working face to be constructed, coating two construction special interface agents, and spreading the sand and stone which are shaped, screened and prepared according to a certain continuous gradation or discontinuous gradation on the working face to be constructed;
(3) And (2) uniformly stirring the poured phosphogypsum-based sand-free self-leveling mortar in the step (1), pumping or directly unloading to an operation surface to be constructed by a pump truck, pouring a sandstone layer by depending on the self-fluidity of the material, forming a leveling layer after self-leveling of the surface, and naturally curing.
Further, in the step (1), the phosphogypsum powder, the modified filler and the additive are mixed according to the following weight parts: 400-920 parts of phosphogypsum powder, 80-600 parts of modified filler and 5-15 parts of additive.
Further, in the step (2), the gravel paving thickness is that slurry with the thickness of 1-2 cm can be paved on the upper surface of the gravel.
Further, in the step (2), the mass ratio of the poured phosphogypsum-based sand-free self-leveling mortar to the sand stone is = 14, and the stirring time is 2-3 min; and the natural curing is that the natural curing is not less than 14 days at normal temperature, and if the natural curing is used outdoors, the surface is subjected to wear-resistant treatment after the natural curing.
Further, the special interface agent is composed of water, vinyl acetate-ethylene copolymer emulsion, polyvinyl alcohol, hydroxypropyl methyl cellulose ether, organic silicon, high-activity silicon dioxide, nano-grade active calcium, a leveling agent, a defoaming agent, superfine wood fiber and a mildew preventive, and is prepared from the following components in parts by weight: 30-40 parts of water, 40-50 parts of vinyl acetate-ethylene copolymer emulsion, 5-25 parts of polyvinyl alcohol, 6-10 parts of hydroxypropyl methyl cellulose ether, 1-5 parts of organic silicon, 2-10 parts of high-activity silicon dioxide, 2-10 parts of nano-grade active calcium, 2-5 parts of flatting agent, 0.5-1.2 parts of defoaming agent, 2-5 parts of superfine wood fiber and 0.2-0.6 part of mildew preventive; the leveling agent is modified acrylate, the defoamer is polyether modified silicone oil, and the mildew preventive is polyamine salt substance.
Furthermore, the sand is continuous gradation or discontinuous gradation with the particle diameter of 2.36-31.5 mm, no sand with the particle diameter larger than 31.5mm or smaller than 2.36mm, the mud content is less than or equal to 1.0 percent, and the stone powder content is less than or equal to 1.0 percent; when the sand is in continuous grade distribution, the content of sand with the particle diameter of 19.0-31.5 mm is 50%, the content of sand with the particle diameter of 9.5-19.0 mm is 30%, and the content of sand with the particle diameter of 2.36-9.5 mm is 20%; when the sand is intermittent, the sand content is 50 percent with the particle diameter between 19.0 and 31.5mm, 0 percent with the particle diameter between 9.5 and 19.0mm and 50 percent with the particle diameter between 2.36 and 9.5 mm.
The modified filler can improve the fluidity of the gypsum-based self-leveling mortar, inhibit the generation of foam and increase the compactness. The used admixture can play a role in reducing water, retarding, defoaming, retaining water, enhancing, hardening and other materials with small using amount.
The special interface agent has three functions of permeation, sealing and reinforcement, can be directly coated on base materials such as concrete, mortar, heat-insulating boards, wood boards and the like, and effectively solves the problems of foaming, cracking, hollowing, infirm bonding and the like of gypsum-based self-leveling mortar.
The sand stone is obtained by shaping, screening and grading according to a certain continuous grading or discontinuous grading, wherein the shaping refers to that the sand stone is ground to remove sharp surfaces by a shaping machine, and then screening is carried out to form the sand stone with uniform size and complete grain type, the content of needle-shaped and flaky particles of the shaped sand stone is reduced, the content of irregular polygon is reduced, the sphericity of broken stone particles is improved, the content of cubes reaches 98%, the content of stone powder is low, and fine grains and coarse particles are not separated. Continuously grading, wherein after the sand is sieved in a standard set of sieves, the particles of the mineral aggregate are continuously distributed from large to small, and each grade occupies a proper proportion, for example, the sand with the particle diameter of 2.36-31.5 mm, the sand without the particle diameter of more than 31.5mm or less than 2.36mm, the sand content with the particle diameter of 19.0-31.5 mm is 50%, the sand content with the particle diameter of 9.5-19.0 mm is 30%, and the sand content with the particle diameter of 2.36-9.5 mm is 20%; the discontinuous gradation is formed by removing one or more continuous particle fractions from the middle in the whole interval of the distribution of the sand particles; for example, sand with a particle diameter of 2.36 to 31.5mm, sand with a particle diameter of > 31.5mm or < 2.36mm, sand with a particle diameter of 19.0 to 31.5mm with a content of 50%, sand with a particle diameter of 9.5 to 19.0mm with a content of 0 and sand with a particle diameter of 2.36 to 9.5mm with a content of 50% are used. The shaped and screened sand can effectively improve the fluidity of the gypsum-based self-leveling mortar on the surface of the sand. Continuous or discontinuous grading can be selected according to the required strength and the filling degree.
If the high-strength gypsum-based sand-free self-leveling mortar prepared by the method is used for outdoor construction, wear-resistant treatment should be performed on the surface.
When the self-leveling mortar is used for wear-resistant treatment in construction, after the surface of the phosphogypsum self-leveling mortar is coated with the interface agent, the phosphorus-magnesium cement self-leveling mortar is used for surface treatment, the surface strength can reach more than 30MPa after treatment, and the wear resistance can reach 5 degrees.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) The high-strength gypsum-based sand-free self-leveling mortar has the advantages of good flowing property, low cost, capability of fully playing the advantages of self-leveling without sand and stone paste and self-leveling with sand, capability of achieving the effects of difficult cracking, hollowing, sanding, floating black and high strength of the sand self-leveling mortar, and capability of having the advantages of good flowing property and low cost of the sand-free self-leveling mortar during construction.
(2) The admixture of the invention can play the role of materials with less consumption such as water reduction, retardation, defoaming, water retention, reinforcement, hardening and the like, and the water-proofing agent is added into the admixture, so that the prepared high-strength gypsum-based sand-free self-leveling mortar can be used for indoor and outdoor construction; the added modified filler can improve the fluidity of the gypsum-based self-leveling mortar, inhibit the generation of foam and increase the compactness. The method can effectively utilize the industrial waste solid phosphogypsum, changes waste into valuable, saves energy, protects environment, and is beneficial to carbon peak reaching and carbon neutralization. The construction method is innovative, and the prepared high-strength gypsum-based sand-free self-leveling mortar is high in flowability, can be automatically leveled when being laid on gravel, and is high in bending and compression strength after later-period maintenance.
Detailed Description
The following description will explain the embodiments of the present invention in further detail, but the present invention is not limited to these embodiments, and any modifications or substitutions in the basic spirit of the embodiments are still within the scope of the present invention as claimed in the claims.
Example 1
The high-strength gypsum-based sand-free self-leveling mortar with high fluidity is prepared from the following raw materials in parts by weight: 400 parts of phosphogypsum powder, 100 parts of modified filler and 5 parts of additive; the phosphogypsum powder is phosphorus building gypsum powder.
Further, the phosphorus building gypsum powder is produced by washing and modifying phosphogypsum and calcining the phosphogypsum at a low temperature of 110-170 ℃, and is prepared from the following raw materials in percentage by weight: the content of beta-type semi-hydrated gypsum (HH) is more than or equal to 75 percent, the content of dihydrate gypsum (DH) is less than or equal to 5 percent, the content of anhydrous type III gypsum (AIII) is less than or equal to 15 percent, the initial setting time of the phosphorous building gypsum powder is more than or equal to 4.5min, the final setting time is less than or equal to 12min, and the flexural strength and the compressive strength of 2h respectively reach more than 2.8MPa and 5.6 MPa; the high-strength gypsum-based sand-free self-leveling mortar has high fluidity, can be poured into a sandstone layer by virtue of the self-fluidity in the construction process, forms a leveling layer after the surface is self-leveled, and has the compressive strength of over 10.0MPa after construction is finished within 1d, the compressive strength of over 20.0MPa within 14d, the softening coefficient of over 0.7 and the impermeability of over P4.0.
Further, the modified filler is prepared from the following raw materials in parts by weight: 5 parts of activated calcium powder, 5 parts of activated quartz powder, 5 parts of modified talcum powder, 20 parts of ash calcium, 30 parts of superfine modified fly ash and 10 parts of superfine silicon powder; the additive is prepared from the following raw materials in parts by weight: 2 parts of water reducing agent, 1 part of retarder, 0.2 part of defoaming agent, 0.6 part of stabilizer, 0.5 part of suspending agent, 2.5 parts of water-retaining agent and 0.3 part of reinforcing agent.
A preparation method of high-strength gypsum-based sand-free self-leveling mortar with high fluidity is characterized by uniformly mixing phosphogypsum powder, modified filler and additive according to the weight part ratio.
The high-strength gypsum-based sand-free self-leveling mortar with high fluidity is applied to preparation of the gypsum-based sand-free self-leveling mortar terrace.
Example 2
The high-strength gypsum-based sand-free self-leveling mortar with high fluidity is prepared from the following raw materials in parts by weight: 900 parts of phosphogypsum powder, 200 parts of modified filler and 12 parts of additive; the phosphogypsum powder is phosphorus building gypsum powder.
Further, the phosphorus building gypsum powder is produced by washing and modifying phosphogypsum and calcining the phosphogypsum at a low temperature of 110-170 ℃, and is prepared from the following raw materials in percentage by weight: the content of beta-type semi-hydrated gypsum (HH) is more than or equal to 75 percent, the content of dihydrate gypsum (DH) is less than or equal to 5 percent, the content of anhydrous type III gypsum (AIII) is less than or equal to 15 percent, the initial setting time of the phosphorous building gypsum powder is more than or equal to 4.5min, the final setting time is less than or equal to 12min, and the flexural strength and the compressive strength of 2h respectively reach more than 2.8MPa and 5.6 MPa; the high-strength gypsum-based sand-free self-leveling mortar has high fluidity, can be poured into a sandstone layer by virtue of the self-fluidity in the construction process, forms a leveling layer after the surface is self-leveled, and has the compressive strength of over 10.0MPa after construction is finished within 1d, the compressive strength of over 20.0MPa within 14d, the softening coefficient of over 0.7 and the impermeability of over P4.0.
Further, the modified filler is prepared from the following raw materials in parts by weight: 20 parts of activated calcium powder, 20 parts of activated quartz powder, 5 parts of modified talcum powder, 20 parts of ash calcium, 10 parts of superfine modified fly ash and 3 parts of superfine silicon powder; the additive is prepared from the following raw materials in parts by weight: 7 parts of water reducing agent, 3 parts of retarder, 1.0 part of defoamer, 0.6 part of stabilizer, 0.1 part of suspending agent, 0.8 part of water-retaining agent and 1.0 part of reinforcing agent.
A preparation method of high-strength gypsum-based sand-free self-leveling mortar with high fluidity is prepared by uniformly mixing phosphogypsum powder, modified filler and additive according to a weight part ratio.
The high-strength gypsum-based sand-free self-leveling mortar with high fluidity is applied to preparation of gypsum-based sand-free self-leveling mortar floors.
Example 3
The high-strength gypsum-based sand-free self-leveling mortar with high fluidity is prepared from the following raw materials in parts by weight: 920 parts of phosphogypsum powder, 80 parts of modified filler and 12 parts of additive; the phosphogypsum powder is mixed-phase gypsum.
Further, the mixed phase gypsum is prepared from the following raw materials in percentage by weight: the content of anhydrous III type (AIII) gypsum is less than or equal to 5 percent, the content of anhydrous II type (AII) gypsum is more than or equal to 20 percent, the content of beta type semi-hydrated gypsum (HH) is more than or equal to 60 percent, the content of dihydrate gypsum (DH) is less than or equal to 5 percent, the initial setting time of the mixed phase gypsum is more than or equal to 10min, the final setting time is less than or equal to 120min, the flexural and compressive strengths of 2h and more than 6.0MPa respectively, and the flexural and compressive strengths of 28d and more than 4.0MPa and 15.0MPa respectively; the high-strength gypsum-based sand-free self-leveling mortar has high fluidity, can be poured into a sandstone layer by virtue of the self-fluidity in the construction process, forms a leveling layer after the surface is self-leveled, and has the compressive strength of over 10.0MPa after construction is finished within 1d, the compressive strength of over 20.0MPa within 14d, the softening coefficient of over 0.7 and the impermeability of over P4.0.
Further, the modified filler is prepared from the following raw materials in parts by weight: 10 parts of activated calcium powder, 10 parts of activated quartz powder, 6 parts of modified talcum powder, 22 parts of ash calcium, 15 parts of superfine modified fly ash and 5 parts of superfine silicon powder; the additive is prepared from the following raw materials in parts by weight: 4 parts of water reducing agent, 1.5 parts of retarder, 0.5 part of defoaming agent, 0.3 part of stabilizer, 0.2 part of suspending agent, 2.0 parts of water-retaining agent and 0.5 part of reinforcing agent.
A preparation method of high-strength gypsum-based sand-free self-leveling mortar with high fluidity is prepared by uniformly mixing phosphogypsum powder, modified filler and additive according to a weight part ratio.
The high-strength gypsum-based sand-free self-leveling mortar with high fluidity is applied to preparation of the gypsum-based sand-free self-leveling mortar terrace.
Example 4
The high-strength gypsum-based sand-free self-leveling mortar with high fluidity is prepared from the following raw materials in parts by weight: 850 parts of phosphogypsum powder, 150 parts of modified filler and 10 parts of additive; the phosphogypsum powder is mixed-phase gypsum.
Further, the mixed phase gypsum is prepared from the following raw materials in percentage by weight: the content of anhydrous III type (AIII) gypsum is less than or equal to 5 percent, the content of anhydrous II type (AII) gypsum is more than or equal to 20 percent, the content of beta type semi-hydrated gypsum (HH) is more than or equal to 60 percent, the content of dihydrate gypsum (DH) is less than or equal to 5 percent, the initial setting time of the mixed phase gypsum is more than or equal to 10min, the final setting time is less than or equal to 120min, the flexural and compressive strengths of 2h and more than 6.0MPa respectively, and the flexural and compressive strengths of 28d and more than 4.0MPa and 15.0MPa respectively; the high-strength gypsum-based sand-free self-leveling mortar has high fluidity, can be poured into a sandstone layer by virtue of the self-fluidity in the construction process, forms a leveling layer after the surface is self-leveled, and has the compressive strength of over 10.0MPa after construction is finished within 1d, the compressive strength of over 20.0MPa within 14d, the softening coefficient of over 0.7 and the impermeability of over P4.0.
Further, the modified filler is prepared from the following raw materials in parts by weight: 15 parts of activated calcium powder, 15 parts of activated quartz powder, 9 parts of modified talcum powder, 28 parts of ash calcium, 10 parts of superfine modified fly ash and 4 parts of superfine silicon powder; the additive is prepared from the following raw materials in parts by weight: 6 parts of water reducing agent, 2.5 parts of retarder, 0.9 part of defoaming agent, 0.5 part of stabilizer, 0.4 part of suspending agent, 1.0 part of water-retaining agent and 0.9 part of reinforcing agent.
A preparation method of high-strength gypsum-based sand-free self-leveling mortar with high fluidity is prepared by uniformly mixing phosphogypsum powder, modified filler and additive according to a weight part ratio.
The high-strength gypsum-based sand-free self-leveling mortar with high fluidity is applied to preparation of gypsum-based sand-free self-leveling mortar floors.
Example 5
The high-strength gypsum-based sand-free self-leveling mortar with high fluidity is prepared from the following raw materials in parts by weight: 400 parts of phosphogypsum powder, 600 parts of modified filler and 5 parts of additive; the phosphogypsum powder is alpha-type high-strength gypsum.
Further, the alpha-type high-strength gypsum is prepared from the following raw materials in percentage by weight: the content of alpha-type semi-hydrated gypsum (HH) is more than or equal to 75 percent, the content of dihydrate gypsum (DH) is less than or equal to 5 percent, the initial setting time of the alpha-type high-strength gypsum is more than or equal to 15min, the final setting time is less than or equal to 40min, the 2h flexural strength reaches more than 5.0MPa, and the drying compressive strength is more than 45.0 MPa; the high-strength gypsum-based sand-free self-leveling mortar has strong fluidity, can be poured into a gravel layer by means of the self-fluidity in the construction process, forms a leveling layer after the surface is self-leveled, and has the compression strength of over 10.0MPa in 1d, the compression strength of over 20.0MPa in 14d, the softening coefficient of over 0.7 and the impermeability of over P4.0 after the construction is finished.
Further, the modified filler is prepared from the following raw materials in parts by weight: 10 parts of activated calcium powder, 10 parts of activated quartz powder, 7 parts of modified talcum powder, 25 parts of ash calcium, 20 parts of superfine modified fly ash and 6 parts of superfine silicon powder; the additive is prepared from the following raw materials in parts by weight: 6 parts of water reducing agent, 3 parts of retarder, 0.9 part of defoaming agent, 0.3 part of stabilizer, 0.2 part of suspending agent, 0.9 part of water-retaining agent and 1.0 part of reinforcing agent.
A preparation method of high-strength gypsum-based sand-free self-leveling mortar with high fluidity is characterized by uniformly mixing phosphogypsum powder, modified filler and additive according to the weight part ratio.
The high-strength gypsum-based sand-free self-leveling mortar with high fluidity is applied to preparation of gypsum-based sand-free self-leveling mortar floors.
Example 6
The high-strength gypsum-based sand-free self-leveling mortar with high fluidity is prepared from the following raw materials in parts by weight: 700 parts of phosphogypsum powder, 300 parts of modified filler and 6 parts of additive; the phosphogypsum powder is alpha-type high-strength gypsum.
Further, the alpha-type high-strength gypsum is prepared from the following raw materials in percentage by weight: the content of alpha-type semi-hydrated gypsum (HH) is more than or equal to 75 percent, the content of dihydrate gypsum (DH) is less than or equal to 5 percent, the initial setting time of the alpha-type high-strength gypsum is more than or equal to 15min, the final setting time is less than or equal to 40min, the 2h flexural strength reaches more than 5.0MPa, and the drying compressive strength reaches more than 45.0 MPa; the high-strength gypsum-based sand-free self-leveling mortar has high fluidity, can be poured into a sandstone layer by virtue of the self-fluidity in the construction process, forms a leveling layer after the surface is self-leveled, and has the compressive strength of over 10.0MPa after construction is finished within 1d, the compressive strength of over 20.0MPa within 14d, the softening coefficient of over 0.7 and the impermeability of over P4.0.
Further, the modified filler is prepared from the following raw materials in parts by weight: 15 parts of activated calcium powder, 13 parts of activated quartz powder, 7 parts of modified talcum powder, 26 parts of ash calcium, 20 parts of superfine modified fly ash and 7 parts of superfine silicon powder; the additive is prepared from the following raw materials in parts by weight: 5 parts of water reducing agent, 2 parts of retarder, 0.6 part of defoaming agent, 0.4 part of stabilizer, 0.3 part of suspending agent, 1.5 parts of water-retaining agent and 0.8 part of reinforcing agent.
A preparation method of high-strength gypsum-based sand-free self-leveling mortar with high fluidity is characterized by uniformly mixing phosphogypsum powder, modified filler and additive according to the weight part ratio.
The high-strength gypsum-based sand-free self-leveling mortar with high fluidity is applied to preparation of the gypsum-based sand-free self-leveling mortar terrace.
Comparative example 1
The difference from the example 1 is that: the gypsum-based sand-free self-leveling mortar is prepared from the following raw materials in parts by weight: 1200 parts of phosphogypsum powder, 600 parts of modified filler and 12 parts of additive, and other conditions are unchanged.
Comparative example 2
The difference from the example 1 is that: the gypsum-based sand-free self-leveling mortar is prepared from the following raw materials in parts by weight: 300 parts of phosphogypsum powder, 100 parts of modified filler and 5 parts of additive; other conditions were unchanged.
Comparative example 3
The preparation of the high strength phosphogypsum based self-leveling mortar was carried out with the method of patent application cn202010698520.X (a sand free gypsum based self-leveling mortar and its preparation method) example 1.
To further illustrate that the present invention can achieve the technical effects, the following experiments were performed:
the gypsum-based sand-free self-leveling mortar was prepared by the methods of examples 1 to 5 and comparative examples 1 to 3, and physical properties were tested according to the JC/T1023-2007 Standard "gypsum-based self-leveling mortar". Simultaneously pouring the prepared gypsum-based sand-free self-leveling mortar on the ground without interface agent treatment, and recording initial setting time/min, final setting time/min and 14d apparent density/kg/m 3 Anti-seepage performance, softening coefficient and cost (yuan/m) 2 ) And compressive strengths of 1d, 7d, and 14d, the experimental results are shown in table 1 below.
TABLE 1
In conclusion, the high-strength gypsum-based sand-free self-leveling mortar is used for construction, the advantages of sand-free paste self-leveling and sand self-leveling can be fully exerted, the effects of difficult cracking, hollowing, sanding, floating black and high strength of the sand self-leveling mortar can be achieved, the advantages of good construction flow performance and low cost of the sand-free self-leveling mortar can be possessed, the defects of the traditional construction process at present are effectively overcome, and the high-strength self-leveling mortar has the advantages of no cracking, no hollowing, sanding, floating black, strong bonding force and high strength, and has the advantages of simplicity and convenience in construction, good construction flow performance, low cost and the like.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. The high-strength gypsum-based sand-free self-leveling mortar with high fluidity is characterized by being prepared from the following raw materials in parts by weight: 400-920 parts of phosphogypsum powder, 80-600 parts of modified filler and 5-12 parts of additive; the phosphogypsum powder is one of phosphorus building gypsum powder, mixed phase gypsum and alpha-type high-strength gypsum.
2. The high-strength gypsum-based sand-free self-leveling mortar with high fluidity according to claim 1, wherein: the phosphorus building gypsum powder is produced by washing and modifying phosphogypsum and calcining the phosphogypsum at a low temperature of 110-170 ℃, and is prepared from the following raw materials in percentage by weight: the content of beta-type semi-hydrated gypsum is more than or equal to 75 percent, the content of dihydrate gypsum is less than or equal to 5 percent, the content of anhydrous III-type gypsum is less than or equal to 15 percent, the initial setting time of the phosphorous building gypsum powder is more than or equal to 4.5min, the final setting time is less than or equal to 12min, and the flexural strength and the compressive strength of 2h reach more than 2.8MPa and 5.6MPa respectively.
3. The high-strength gypsum-based sand-free self-leveling mortar with high fluidity according to claim 1, wherein: the mixed phase gypsum is prepared from the following raw materials in percentage by weight: the content of anhydrous type III gypsum is less than or equal to 5 percent, the content of anhydrous type II gypsum is more than or equal to 20 percent, the content of beta type semi-hydrated gypsum is more than or equal to 60 percent, the content of dihydrate gypsum is less than or equal to 5 percent, the initial setting time of the mixed phase gypsum is more than or equal to 10min, the final setting time is less than or equal to 120min, the flexural and compressive strengths of 2h and more than 6.0MPa respectively, and the flexural and compressive strengths of 28d and more than 4.0MPa and 15.0MPa respectively.
4. The high-strength gypsum-based sand-free self-leveling mortar with high fluidity according to claim 1, wherein: the alpha-type high-strength gypsum is prepared from the following raw materials in percentage by weight: the content of the alpha-type semi-hydrated gypsum is more than or equal to 75 percent, the content of the dihydrate gypsum is less than or equal to 5 percent, the initial setting time of the alpha-type high-strength gypsum is more than or equal to 15min, the final setting time is less than or equal to 40min, the 2h flexural strength reaches more than 5.0MPa, and the drying compressive strength reaches more than 45.0 MPa.
5. The high-strength gypsum-based sand-free self-leveling mortar with high fluidity according to claim 1, wherein: the modified filler is prepared from the following raw materials in parts by weight: 5 to 20 portions of activated calcium powder, 5 to 20 portions of activated quartz powder, 5 to 10 portions of modified talcum powder, 20 to 30 portions of ash calcium, 10 to 30 portions of superfine modified fly ash and 3 to 10 portions of superfine silicon powder.
6. The high-strength gypsum-based sand-free self-leveling mortar with high fluidity according to claim 1, wherein: the additive is prepared from the following raw materials in parts by weight: 2 to 7 portions of water reducing agent, 1 to 3 portions of retarder, 0.2 to 1.0 portion of defoaming agent, 0.2 to 0.6 portion of stabilizing agent, 0.1 to 0.5 portion of suspending agent, 0.8 to 2.5 portions of water-retaining agent and 0.3 to 1.0 portion of reinforcing agent; the water reducing agent is modified polycarboxylate ether, the retarder is inorganic salt substance, the defoaming agent is polyether modified silicone oil, the stabilizer is polyacrylamide substance, the suspending agent is polycarboxylate substance, the water retaining agent is cellulose ether, and the reinforcing agent is silicon steel element.
7. The high-strength gypsum-based sand-free self-leveling mortar with high fluidity according to claim 1, which is characterized in that: the high-strength gypsum-based sand-free self-leveling mortar has high fluidity, can be poured into a sandstone layer by virtue of the self-fluidity in the construction process, forms a leveling layer after the surface is self-leveled, and has the compressive strength of over 10.0MPa after construction is finished within 1d, the compressive strength of over 20.0MPa within 14d, the softening coefficient of over 0.7 and the impermeability of over P4.0.
8. A preparation method of high-strength gypsum-based sand-free self-leveling mortar with strong fluidity is characterized by comprising the following steps: the phosphogypsum powder, the modified filler and the additive are uniformly mixed according to the weight part ratio.
9. The high-strength gypsum-based sand-free self-leveling mortar with high fluidity is applied to preparation of gypsum-based sand-free self-leveling mortar floors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210842456.7A CN115159946A (en) | 2022-07-18 | 2022-07-18 | High-strength gypsum-based sand-free self-leveling mortar with high fluidity and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210842456.7A CN115159946A (en) | 2022-07-18 | 2022-07-18 | High-strength gypsum-based sand-free self-leveling mortar with high fluidity and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115159946A true CN115159946A (en) | 2022-10-11 |
Family
ID=83495613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210842456.7A Pending CN115159946A (en) | 2022-07-18 | 2022-07-18 | High-strength gypsum-based sand-free self-leveling mortar with high fluidity and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115159946A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116041017A (en) * | 2022-12-26 | 2023-05-02 | 中建西部建设新材料科技有限公司 | High-water-resistance phosphogypsum self-leveling mortar and preparation method thereof |
| CN116693321A (en) * | 2023-04-13 | 2023-09-05 | 重庆交通大学 | Preparation method of modified phosphogypsum-based self-leveling mortar |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553526A (en) * | 2013-10-16 | 2014-02-05 | 上海利物宝建筑科技有限公司 | Gypsum-based door and window seam filling and sealing mortar as well as preparation method and application thereof |
| CN114573314A (en) * | 2021-06-07 | 2022-06-03 | 瓮福化工科技有限公司 | Phosphogypsum-based sound insulation self-leveling mortar and application thereof |
-
2022
- 2022-07-18 CN CN202210842456.7A patent/CN115159946A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553526A (en) * | 2013-10-16 | 2014-02-05 | 上海利物宝建筑科技有限公司 | Gypsum-based door and window seam filling and sealing mortar as well as preparation method and application thereof |
| CN114573314A (en) * | 2021-06-07 | 2022-06-03 | 瓮福化工科技有限公司 | Phosphogypsum-based sound insulation self-leveling mortar and application thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116041017A (en) * | 2022-12-26 | 2023-05-02 | 中建西部建设新材料科技有限公司 | High-water-resistance phosphogypsum self-leveling mortar and preparation method thereof |
| CN116693321A (en) * | 2023-04-13 | 2023-09-05 | 重庆交通大学 | Preparation method of modified phosphogypsum-based self-leveling mortar |
| CN116693321B (en) * | 2023-04-13 | 2024-05-10 | 重庆交通大学 | Preparation method of modified phosphogypsum-based self-leveling mortar |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110304884B (en) | Cement phosphogypsum stabilized macadam material for road base and preparation method and application thereof | |
| WO2016145548A1 (en) | Self-compacting concrete prepared from industrial solid waste and preparation method therefor | |
| CN108516781A (en) | A kind of ardealite cement graded broken stone stabilized zone and preparation method thereof | |
| CN104355584A (en) | Cementitious capillary crystalline waterproofing building material | |
| CN103992078B (en) | A kind of gravity flowing levelling mortar being mixed with phosphorus slag powder | |
| CN106747128A (en) | A kind of big fluidised form High Strength Non-shrinking Filling Material and preparation method thereof | |
| CN115159946A (en) | High-strength gypsum-based sand-free self-leveling mortar with high fluidity and preparation method and application thereof | |
| CN111825406A (en) | Phosphogypsum-based self-leveling mortar | |
| JP2006528933A (en) | Screed containing recycled glass waste | |
| CN113698164B (en) | Anti-cracking anti-settling road water-stabilizing layer material and preparation method thereof | |
| CN102815909B (en) | Gangue ready mixed mortar and preparation method thereof | |
| CN103708748A (en) | Modified phosphogypsum material used for sea reclamation | |
| CN114671644B (en) | High-early-strength low-resilience high-performance sprayed concrete and preparation method thereof | |
| CN106587873A (en) | Self-leveling mortar mixed with desalted sea sand | |
| CN107892531B (en) | Production method of tunnel cement mortar | |
| CN115286337B (en) | Construction method of pouring phosphogypsum-based sand-free self-leveling mortar and construction surface structure thereof | |
| CN112919870A (en) | High-strength self-compacting concrete with recycled fine aggregate | |
| CN112879086A (en) | Cemented filling method for cementing material and aggregate in different proportions | |
| CN115196936A (en) | Gypsum-based indoor terrace self-leveling concrete prepared from phosphogypsum active powder and preparation method and application thereof | |
| JP6165447B2 (en) | Method for producing concrete with reduced bleeding | |
| CN115124286A (en) | Environment-friendly regenerated backfill material and preparation method thereof | |
| CN110436871B (en) | Flowable light gypsum ground cushion material and preparation method thereof | |
| CN115124315A (en) | Pouring type sand-free self-leveling mortar taking phosphogypsum as main raw material and preparation method and application thereof | |
| CN106380163A (en) | Desert sand self-leveling mortar, and preparation method and construction method thereof | |
| CN111454036A (en) | Low thermal expansion concrete and admixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221011 |
|
| RJ01 | Rejection of invention patent application after publication |