CN112723853A - Efflorescence-free low-alkalinity high-fire-resistance inner and outer wall facing mortar and preparation method thereof - Google Patents
Efflorescence-free low-alkalinity high-fire-resistance inner and outer wall facing mortar and preparation method thereof Download PDFInfo
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- CN112723853A CN112723853A CN202011631139.8A CN202011631139A CN112723853A CN 112723853 A CN112723853 A CN 112723853A CN 202011631139 A CN202011631139 A CN 202011631139A CN 112723853 A CN112723853 A CN 112723853A
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- alkalinity
- saltpetering
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 60
- 206010037844 rash Diseases 0.000 title claims description 31
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 60
- 239000004568 cement Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 30
- 239000010440 gypsum Substances 0.000 claims abstract description 30
- 229920002522 Wood fibre Polymers 0.000 claims abstract description 25
- 239000002025 wood fiber Substances 0.000 claims abstract description 25
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 21
- 239000005871 repellent Substances 0.000 claims abstract description 21
- 230000002940 repellent Effects 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 239000012764 mineral filler Substances 0.000 claims abstract description 19
- 239000004816 latex Substances 0.000 claims abstract description 13
- 229920000126 latex Polymers 0.000 claims abstract description 13
- 239000002562 thickening agent Substances 0.000 claims abstract description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000006004 Quartz sand Substances 0.000 claims description 36
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 36
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 28
- 238000002156 mixing Methods 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 20
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 18
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 18
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 18
- 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 18
- 239000002245 particle Substances 0.000 claims description 15
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 14
- XJKVPKYVPCWHFO-UHFFFAOYSA-N silicon;hydrate Chemical group O.[Si] XJKVPKYVPCWHFO-UHFFFAOYSA-N 0.000 claims description 14
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 12
- 229920001971 elastomer Polymers 0.000 claims description 12
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 12
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 12
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 12
- 239000011975 tartaric acid Substances 0.000 claims description 12
- 235000002906 tartaric acid Nutrition 0.000 claims description 12
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 10
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 claims description 10
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 10
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 10
- 239000001023 inorganic pigment Substances 0.000 claims description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 8
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 7
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- 108090000623 proteins and genes Chemical class 0.000 claims description 4
- 102000004169 proteins and genes Human genes 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 229930182490 saponin Natural products 0.000 claims description 4
- 150000007949 saponins Chemical class 0.000 claims description 4
- 235000017709 saponins Nutrition 0.000 claims description 4
- 229920006027 ternary co-polymer Polymers 0.000 claims description 4
- 229920002554 vinyl polymer Polymers 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 241000276489 Merlangius merlangus Species 0.000 claims description 2
- 239000001034 iron oxide pigment Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 17
- 239000011398 Portland cement Substances 0.000 abstract description 7
- 239000003513 alkali Substances 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 17
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 12
- 238000006253 efflorescence Methods 0.000 description 6
- 239000011575 calcium Substances 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000001397 quillaja saponaria molina bark Substances 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/34—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 cold phosphate binders
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2023—Resistance against alkali-aggregate reaction
-
- 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
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
- C04B2111/82—Coloured 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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention relates to a saltpetering-free low-alkalinity high-fire-resistance interior and exterior wall facing mortar and a preparation method thereof, wherein the saltpetering-free low-alkalinity high-fire-resistance interior and exterior wall facing mortar is mainly prepared from the following components in parts by weight: 100 parts of phosphoaluminate cement, 5-50 parts of gypsum, 500 parts of aggregate, 800 parts of mineral filler, 10-100 parts of thickening agent, 0.5-2 parts of wood fiber, 1-5 parts of retarder, 0.2-4 parts of water repellent, 1-6 parts of air-entraining agent, 0.2-0.5 part of water reducing agent, and 5-50 parts of redispersible latex powder. The invention overcomes the defects of easy saltpetering, high alkali content and fire resistance of the prior facing mortar which adopts portland cement (including white portland cement) or a ternary system (portland cement-high alumina cement-gypsum) as a main cementing material.
Description
Technical Field
The invention relates to a saltpetering-free low-alkalinity high-fire-resistance inner and outer wall facing mortar and a preparation method thereof, which are applied to the production field of building materials.
Background
The raw materials for preparing the color facing mortar mainly comprise an inorganic cementing material, a filler, an additive, redispersible latex powder and a certain amount of mineral pigment. It is painted to the outer surface of building or indoor to reach the decoration and protection effect.
Facing mortar has been in the foreign country for over a hundred years. Because the facing material adopts natural minerals as raw materials, the facing effect is simple and plain, the color is natural and lasting, and the facing material can adapt to the climatic environments of different regions, thereby being widely applied to regions such as Europe, North America and the like. As a foreign decorative material variety, the decorative material is applied to some villa projects in China in 2000. But the further development of the product is restricted all the time due to some problems of the product.
The domestic facing mortar mainly uses portland cement (including white portland cement) or a ternary system (portland cement-high alumina cement-gypsum) as a main cementing material. Wherein the silicate cement in a larger proportion is a high-alkalinity cementing material, and Ca generated after calcium silicate in the cement is hydrated after water is added2+And OH-Easily permeate to the surface under capillary pressure and are mixed with CO in the air2The reaction generates white calcium carbonate crystals insoluble in water, so that the surface is whitened, namely, the efflorescence is caused, and the efflorescence is difficult to completely avoid even under the condition of a ternary formula system, thereby causing a great problem for the use of products. And the existing decorative mortar products have high alkalinity and pH value of more than 10, are not suitable for indoor inner walls and are not good for human health.
At present, an external wall insulation system mostly adopts organic materials as main insulation filling materials, so that the external wall insulation system is easy to burn when meeting high temperature conditions, and great loss is caused to the safety of buildings and residents. The traditional decorative finish materials such as latex paint, real stone paint and the like are organic materials, are easy to burn at high temperature and cannot protect the heat-insulating materials in the interior, and the main component of the traditional decorative mortar is portland cement, so that calcium carbonate in a hydration product is easy to decompose at the high temperature of 700-800 ℃, thereby causing coating failure. Does not play a role in protecting the heat-insulating material. Therefore, it is desirable to provide a saltpetering-free, low-alkalinity, high-fire-resistant interior and exterior wall finishing mortar and a preparation method thereof.
Disclosure of Invention
In order to overcome the defects that the conventional facing mortar is easy to be whiskered, high in alkali content and non-fireproof due to the fact that portland cement (including white portland cement) or a ternary system (portland cement-high-alumina cement-gypsum) is adopted as a main cementing material, the invention provides the facing mortar for the inner wall and the outer wall, which is free of whiskering, low in alkalinity and high in fireproof performance, and the preparation method of the facing mortar.
The technical scheme of the invention is as follows:
the efflorescence-free low-alkalinity high-fire-resistance interior and exterior wall facing mortar is mainly prepared from the following components in parts by weight:
100 portions of phosphoaluminate cement
5-50 parts of gypsum
Aggregate 500-800 parts
10-100 parts of mineral filler
0.5 to 2 portions of thickening agent
1-5 parts of wood fiber
0.2-4 parts of retarder
1-6 parts of water repellent
0.2 to 0.5 portion of air entraining agent
0.2-1 part of water reducing agent
5-50 parts of redispersible latex powder.
The efflorescence-free low-alkalinity high-fire-resistance inner and outer wall facing mortar adopts the phosphoaluminate cement as a main cementing material, the gypsum as an auxiliary cementing material, and the aggregate and the mineral filler are matched, so that the efflorescence-free low-alkalinity high-fire-resistance inner and outer wall facing mortar has the advantages of efflorescence free, low alkalinity, high fire resistance and the like. The phosphoaluminate cement accounts for 10-30% of the total weight of the system, is low in alkalinity (the alkali content is less than 0.4 w/%), is matched with gypsum and a functional auxiliary agent, the pH value of the product can be about 7, the product is weak alkaline, the product can be used on an outer wall and can not be subjected to efflorescence in practical application, and the product is weak alkaline when used on an inner wall material, is more skin-friendly, has excellent water resistance, and has great advantages when used as an inner wall decoration material. And the phosphoaluminate cement is matched with aggregate (quartz sand) and mineral fillers (alumina, zirconia and the like), after the optimal dosage proportion is adopted, the product has the highest refractoriness of more than 1400 ℃, can play a great protection role on heat-insulating materials, and can be applied to projects with higher requirements on the fireproof performance of decorative coatings of inner and outer walls. The preferred system components are effective in enhancing other properties of the product such as workability, etc.
The efflorescence-free low-alkalinity high-fire-resistance interior and exterior wall facing mortar further comprises: 0.1-8 parts of inorganic pigment.
Inorganic pigment can be used for mixing the efflorescence-free low-alkalinity high-fire-resistant inner and outer wall facing mortar into color according to the requirement.
The strength grade of the phosphoaluminate cement is more than or equal to 42.5 grades, and the specific surface area>320m2/kg。
The preferable phosphoaluminate cement can better improve the mechanical property and the fire resistance of the product.
The gypsum is alpha-semi-hydrated gypsum powder or anhydrous gypsum powder, the whiteness is more than or equal to 82, and the particle size is more than or equal to 200 meshes.
The preferable gypsum can better improve the forming effect of the product and reduce the alkalinity of the product.
The aggregate comprises one or more than two of 40-70 mesh quartz sand, 80-120 mesh quartz sand or 150-200 mesh quartz sand which are optionally mixed.
The preferred graded aggregate can improve the compactness and refractoriness of the product.
The whiteness of the mineral filler is more than or equal to 84, the particle size is 150-200 meshes, and the mineral filler comprises one or more than two of coarse whiting powder, zirconia powder, alumina powder or magnesia powder which are randomly mixed.
Preferred mineral fillers can provide better filling in the system.
The thickening agent is one or any mixture of hydroxypropyl methyl cellulose ether or hydroxyethyl methyl cellulose ether, and the viscosity ranges of the hydroxypropyl methyl cellulose ether or the hydroxyethyl methyl cellulose ether are 5000-40000 mPa.S; the length of the wood fiber is 450-550 mu m; the retarder is one or any mixture of tartaric acid and sodium lignosulfonate; the water repellent is a silane water repellent; the air entraining agent is one or more than two of saponins, protein salts or rosin resins which are optionally mixed; the water reducing agent is a polycarboxylic acid water reducing agent; the redispersible latex powder is ethylene-vinyl acetate copolymer rubber powder or ethylene-vinyl acetate-acrylate ternary copolymer latex powder.
Preferred thickeners may provide better workability of the product.
The inorganic pigment is an iron oxide pigment.
The preferred inorganic pigments are readily available and low in cost.
The preparation method of the efflorescence-free low-alkalinity high-fire-resistance interior and exterior wall facing mortar comprises the following steps of:
(1) starting the stirrer, adjusting the stirring speed to 55 +/-5 r/min, adding the phosphoaluminate cement, the gypsum and the aggregate accounting for 50-60% of the weight of the phosphoaluminate cement and the gypsum into the stirrer, and uniformly mixing;
(2) keeping the stirring speed of 55 +/-5 r/min, slowly adding a thickening agent, wood fibers, a retarder, a water repellent, an air entraining agent, a water reducing agent and redispersible latex powder into the mixture obtained in the step (1), and uniformly mixing;
(3) and (3) keeping the stirring speed of 55 +/-5 r/min, adding mineral filler and the rest aggregate into the mixture obtained in the step (2), and uniformly mixing to obtain the saltpetering-free low-alkalinity high-fire-resistance inner and outer wall facing mortar.
The inorganic pigment is also added in the step (2).
Compared with the prior art, the method has the following advantages:
1) the efflorescence-free low-alkalinity high-fire-resistance inner and outer wall facing mortar adopts the phosphoaluminate cement as a main cementing material, the gypsum as an auxiliary cementing material, and the aggregate and the mineral filler are matched, so that the efflorescence-free low-alkalinity high-fire-resistance inner and outer wall facing mortar has the advantages of efflorescence resistance, low alkalinity, high fire resistance and the like;
2) the optimized system components can effectively improve other properties of the product, such as operability, workability and the like;
3) inorganic pigment can be used for mixing the efflorescence-free low-alkalinity high-fire-resistant inner and outer wall facing mortar into color according to the requirement;
4) the preparation method of the efflorescence-free low-alkalinity high-fire-resistance inner and outer wall facing mortar is simple in process and convenient to operate.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the embodiments of the specification.
Example 1
The invention relates to a saltpetering-free low-alkalinity high-fire-resistant interior and exterior wall facing mortar which is mainly prepared from the following components in parts by weight:
100 portions of phosphoaluminate cement
High-strength gypsum 5 parts
400 portions of 80-120 mesh quartz sand
400 portions of 40-70 mesh quartz sand
36.6 portions of 200 meshes heavy calcium powder
Hydroxypropyl methylcellulose ether 2 parts
4 parts of wood fiber
Tartaric acid 0.4 part
1.6 parts of sodium lignosulfonate
5 portions of silane water repellent
0.1 part of protein salt air entraining agent
0.3 part of polycarboxylic acid water reducing agent
40 parts of ethylene-vinyl acetate copolymer rubber powder
5 parts of iron oxide red.
The strength grade of the phosphoaluminate cement is more than or equal to 42.5 grades, and the specific surface area>320m2/kg。
The whiteness of the gypsum is more than or equal to 82, and the particle size is more than or equal to 200 meshes.
The whiteness of the mineral filler is more than or equal to 84.
The viscosity range of the hydroxypropyl methyl cellulose ether is 5000-40000mPa & S; the length of the wood fiber is 450-550 mu m.
The preparation method of the efflorescence-free low-alkalinity high-fire-resistance inner and outer wall facing mortar comprises the following steps of:
(1) starting a stirrer, adjusting the stirring speed to 55r/min, adding the phosphoaluminate cement, the high-strength gypsum and the aggregate (80-120 meshes of quartz sand and 40-70 meshes of quartz sand) accounting for 55 percent of the weight of the high-strength gypsum into the stirrer, and uniformly mixing;
(2) keeping the stirring speed at 55r/min, slowly adding hydroxypropyl methyl cellulose ether, wood fiber, tartaric acid, sodium lignosulphonate, silane water repellent, protein salt air entraining agent, polycarboxylic acid water reducing agent, iron oxide red and ethylene-vinyl acetate copolymer rubber powder into the mixture obtained in the step (1), and uniformly mixing;
(3) keeping the stirring speed of 55r/min, adding 200 meshes of heavy calcium powder and the rest of aggregate (80-120 meshes of quartz sand and 40-70 meshes of quartz sand) into the mixture obtained in the step (2), and uniformly mixing to obtain the saltpetering-free low-alkalinity high-fire-resistance inner and outer wall facing mortar.
Example 2
The invention relates to a saltpetering-free low-alkalinity high-fire-resistant interior and exterior wall facing mortar which is mainly prepared from the following components in parts by weight:
250 portions of phosphoaluminate cement
22 parts of anhydrous gypsum powder
300 portions of 80-120 mesh quartz sand
200 portions of 40-70 mesh quartz sand
100 portions of 150-mesh 200-mesh quartz sand
77.4 parts of 150-mesh alumina powder
Hydroxypropyl methylcellulose ether 2 parts
4 parts of wood fiber
Tartaric acid 0.2 part
1 part of sodium lignosulfonate
5 portions of silane water repellent
0.1 part of rosin resin air entraining agent
0.3 part of polycarboxylic acid water reducing agent
30 parts of ethylene-vinyl acetate copolymer rubber powder
8 parts of iron oxide green.
The strength grade of the phosphoaluminate cement is more than or equal to 42.5 grades, and the specific surface area>320m2/kg。
The whiteness of the gypsum is more than or equal to 82, and the particle size is more than or equal to 200 meshes.
The whiteness of the mineral filler is not less than 84, and the particle size is 150-200 meshes.
The viscosity range of the hydroxypropyl methyl cellulose ether is 5000-40000mPa & S; the length of the wood fiber is 450-550 mu m.
The preparation method of the efflorescence-free low-alkalinity high-fire-resistance inner and outer wall facing mortar comprises the following steps of:
(1) starting a stirrer, adjusting the stirring speed to 60r/min, adding the phosphoaluminate cement, the anhydrous gypsum powder and the aggregate (comprising 80-120 meshes of quartz sand, 40-70 meshes of quartz sand and 150-200 meshes of quartz sand) accounting for 50 percent of the weight of the aggregate into the stirrer, and uniformly mixing;
(2) keeping the stirring speed at 60r/min, slowly adding hydroxypropyl methyl cellulose ether, wood fiber, tartaric acid, sodium lignosulphonate, silane water repellent, rosin resin air entraining agent, polycarboxylic acid water reducer, iron oxide red and ethylene-vinyl acetate copolymer rubber powder into the mixture obtained in the step (1), and uniformly mixing;
(3) and (3) keeping the stirring speed of 60r/min, adding 150-mesh alumina powder and the rest aggregate into the mixture obtained in the step (2), and uniformly mixing to obtain the saltpetering-free low-alkalinity high-fire-resistance inner and outer wall facing mortar.
Example 3
The invention relates to a saltpetering-free low-alkalinity high-fire-resistant interior and exterior wall facing mortar which is mainly prepared from the following components in parts by weight:
300 portions of phosphoaluminate cement
50 parts of anhydrous gypsum powder
206.9 parts of 80-120 mesh quartz sand
150 portions of 40-70 mesh quartz sand
150 portions of 150-mesh 200-mesh quartz sand
100 portions of 180-mesh zirconia powder
Hydroxyethyl methyl cellulose ether 1.5 parts
4.8 parts of wood fiber
Tartaric acid 2.3 parts
1.7 parts of sodium lignosulfonate
4.3 portions of silane water repellent
0.5 part of rosin resin air entraining agent
Polycarboxylic acid water reducing agent 1 part
20 parts of ethylene-vinyl acetate copolymer rubber powder
0.1 part of iron oxide yellow.
The strength grade of the phosphoaluminate cement is more than or equal to 42.5 grades, and the specific surface area>320m2/kg。
The whiteness of the gypsum is more than or equal to 82, and the particle size is more than or equal to 200 meshes.
The whiteness of the mineral filler is not less than 84, and the particle size is 150-200 meshes.
The viscosity range of the hydroxyethyl methyl cellulose ether is 5000-40000mPa & S; the length of the wood fiber is 450-550 mu m.
The preparation method of the efflorescence-free low-alkalinity high-fire-resistance inner and outer wall facing mortar comprises the following steps of:
(1) starting a stirrer, adjusting the stirring speed to 50r/min, adding the phosphoaluminate cement, the anhydrous gypsum powder and aggregate (comprising 80-120 meshes of quartz sand, 40-70 meshes of quartz sand and 150-200 meshes of quartz sand) accounting for 60 percent of the weight of the aggregate into the stirrer, and uniformly mixing;
(2) keeping the stirring speed of 50r/min, slowly adding hydroxyethyl methyl cellulose ether, wood fiber, tartaric acid, sodium lignosulphonate, silane water repellent, rosin resin air entraining agent, polycarboxylic acid water reducer, iron oxide red and ethylene-vinyl acetate copolymer rubber powder into the mixture obtained in the step (1), and uniformly mixing;
(3) and (3) keeping the stirring speed of 50r/min, adding 180-mesh zirconia powder and the rest aggregate into the mixture obtained in the step (2), and uniformly mixing to obtain the saltpetering-free low-alkalinity high-fire-resistance inner and outer wall facing mortar.
Example 4
The invention relates to a saltpetering-free low-alkalinity high-fire-resistant interior and exterior wall facing mortar which is mainly prepared from the following components in parts by weight:
220 portions of phosphoaluminate cement
15 portions of alpha-semi-hydrated gypsum powder
500 portions of 80-120 mesh quartz sand
200 portions of 150-mesh 200-mesh quartz sand
10 portions of 200 meshes of heavy calcium powder
Hydroxypropyl methylcellulose ether 1 part
Hydroxyethyl methyl cellulose ether 1 part
4 parts of wood fiber
Tartaric acid 3.6 parts
5 portions of silane water repellent
Saponins air-entraining agent 0.1 part
0.3 part of polycarboxylic acid water reducing agent
40 parts of ethylene-vinyl acetate copolymer rubber powder
The strength grade of the phosphoaluminate cement is more than or equal to 42.5 grades, and the specific surface area>320m2/kg。
The whiteness of the gypsum is more than or equal to 82, and the particle size is more than or equal to 200 meshes.
The whiteness of the mineral filler is not less than 84, and the particle size is 150-200 meshes.
The viscosity ranges of the hydroxypropyl methyl cellulose ether and the hydroxyethyl methyl cellulose ether are both 5000-40000 mPa.S; the length of the wood fiber is 450-550 mu m.
The preparation method of the efflorescence-free low-alkalinity high-fire-resistance inner and outer wall facing mortar comprises the following steps of:
(1) starting a stirrer, adjusting the stirring speed to 55r/min, adding the phosphoaluminate cement, the alpha-semi-hydrated gypsum powder and aggregate (comprising 80-120 meshes of quartz sand and 150-200 meshes of quartz sand) accounting for 55 percent of the weight of the alpha-semi-hydrated gypsum powder into the stirrer, and uniformly mixing;
(2) keeping the stirring speed at 55r/min, slowly adding hydroxypropyl methyl cellulose ether, hydroxyethyl methyl cellulose ether, wood fiber, tartaric acid, silane water repellent, saponin air entraining agent, polycarboxylic acid water reducer and ethylene-vinyl acetate copolymer rubber powder into the mixture obtained in the step (1), and uniformly mixing;
(3) and (3) keeping the stirring speed of 55r/min, adding 200-mesh heavy calcium powder and the rest aggregate into the mixture obtained in the step (2), and uniformly mixing to obtain the saltpetering-free low-alkalinity high-fire-resistance inner and outer wall facing mortar.
Example 5
The invention relates to a saltpetering-free low-alkalinity high-fire-resistant interior and exterior wall facing mortar which is mainly prepared from the following components in parts by weight:
180 portions of phosphoaluminate cement
25 parts of anhydrous gypsum powder
700 parts of 40-70 mesh quartz sand
67.4 portions of 200-mesh magnesia powder
Hydroxypropyl methylcellulose ether 2 parts
4 parts of wood fiber
1.2 parts of sodium lignosulfonate
5 portions of silane water repellent
0.2 part of rosin resin air entraining agent
0.2 part of polycarboxylic acid water reducing agent
Ethylene-vinyl acetate-acrylate ternary copolymer latex powder 15 parts
The strength grade of the phosphoaluminate cement is more than or equal to 42.5 grades, and the specific surface area>320m2/kg。
The whiteness of the gypsum is more than or equal to 82, and the particle size is more than or equal to 200 meshes.
The whiteness of the mineral filler is not less than 84, and the particle size is 150-200 meshes.
The viscosity range of the hydroxypropyl methyl cellulose ether is 5000-40000mPa & S; the length of the wood fiber is 450-550 mu m.
The preparation method of the efflorescence-free low-alkalinity high-fire-resistance inner and outer wall facing mortar comprises the following steps of:
(1) starting the stirrer, adjusting the stirring speed to 50r/min, adding the phosphoaluminate cement, the anhydrous gypsum powder and 40-70 mesh quartz sand accounting for 60 percent of the weight of the powder into the stirrer, and uniformly mixing;
(2) keeping the stirring speed of 50r/min, slowly adding hydroxypropyl methyl cellulose ether, wood fiber, sodium lignosulfonate, silane water repellent, rosin resin air entraining agent, polycarboxylic acid water reducer and ethylene-vinyl acetate-acrylate ternary copolymer latex powder into the mixture obtained in the step (1), and uniformly mixing;
(3) keeping the stirring speed of 50r/min, adding 200-mesh magnesia powder and the rest 40-70-mesh quartz sand into the mixture obtained in the step (2), and uniformly mixing to obtain the efflorescence-free low-alkalinity high-fire-resistant inner and outer wall facing mortar.
Example 6
The invention relates to a saltpetering-free low-alkalinity high-fire-resistant interior and exterior wall facing mortar which is mainly prepared from the following components in parts by weight:
200 portions of phosphoaluminate cement
Anhydrous gypsum powder 45 portions
341 portions of 80 to 120 meshes of quartz sand
300 parts of 40-70 mesh quartz sand
69.3 parts of 200-mesh zirconia powder
Hydroxypropyl methylcellulose ether 1.7 parts
1 part of wood fiber
1 part of tartaric acid
Sodium lignosulfonate 2 parts
5 portions of silane water repellent
0.3 part of rosin resin air entraining agent
0.7 part of polycarboxylic acid water reducing agent
Ethylene-vinyl acetate copolymer rubber powder 33 parts
The strength grade of the phosphoaluminate cement is more than or equal to 42.5 grades, and the specific surface area>320m2/kg。
The whiteness of the gypsum is more than or equal to 82, and the particle size is more than or equal to 200 meshes.
The whiteness of the mineral filler is not less than 84, and the particle size is 150-200 meshes.
The viscosity range of the hydroxypropyl methyl cellulose ether is 5000-40000mPa & S; the length of the wood fiber is 450-550 mu m.
The preparation method of the efflorescence-free low-alkalinity high-fire-resistance inner and outer wall facing mortar comprises the following steps of:
(1) starting a stirrer, adjusting the stirring speed to 60r/min, adding the phosphoaluminate cement, the anhydrous gypsum powder and the aggregate (comprising 80-120 meshes of quartz sand and 40-70 meshes of quartz sand) accounting for 50% of the weight of the aggregate into the stirrer, and uniformly mixing;
(2) keeping the stirring speed at 60r/min, slowly adding a thickening agent, wood fibers, tartaric acid, sodium lignosulphonate, silane water repellent, rosin resin air entraining agent, polycarboxylic acid water reducer and ethylene-vinyl acetate copolymer rubber powder into the mixture obtained in the step (1), and uniformly mixing;
(3) and (3) keeping the stirring speed of 60r/min, adding 200-mesh zirconia powder and the rest aggregate into the mixture obtained in the step (2), and uniformly mixing to obtain the saltpetering-free low-alkalinity high-fire-resistance inner and outer wall facing mortar.
Experimental data:
(I) performance detection of efflorescence-free, low-alkalinity, high-fire-resistance and interior and exterior wall facing mortar
The test method comprises the following steps: refer to JC/T1024-
TABLE 1 Performance test results of efflorescence-free, low-alkalinity, high-fire-resistant interior and exterior wall facing mortar
As can be seen from the above table, the efflorescence-free, low-alkalinity and high-fire-resistant interior and exterior wall facing mortar of the present application is efflorescence-resistant, excellent in fire-resistant performance, low in water absorption, good in folding/compression strength, good in bonding strength, good in stain resistance and good in weather resistance.
The alkali-efflorescence-free, low-alkalinity, high-fire-resistance interior and exterior wall finishing mortar and the method for producing the same according to the present invention are not limited to the above-described examples, and any modification or replacement according to the principles of the present invention is within the scope of the present invention.
Claims (10)
1. The efflorescence-free low-alkalinity high-fire-resistance interior and exterior wall facing mortar is characterized in that: the adhesive is mainly prepared from the following components in parts by weight:
100 portions of phosphoaluminate cement
5-50 parts of gypsum
Aggregate 500-800 parts
10-100 parts of mineral filler
0.5 to 2 portions of thickening agent
1-5 parts of wood fiber
0.2-4 parts of retarder
1-6 parts of water repellent
0.2 to 0.5 portion of air entraining agent
0.2-1 part of water reducing agent
5-50 parts of redispersible latex powder.
2. The saltpetering-free, low-alkalinity, high-fire-resistant interior and exterior wall finishing mortar of claim 1, wherein: the efflorescence-free low-alkalinity high-fire-resistance interior and exterior wall facing mortar further comprises: 0.1-8 parts of inorganic pigment.
3. The saltpetering-free, low-alkalinity, high-fire-resistant interior and exterior wall finishing mortar of claim 1, wherein: the strength grade of the phosphoaluminate cement is more than or equal to 42.5 grades, and the specific surface area>320m2/kg。
4. The saltpetering-free, low-alkalinity, high-fire-resistant interior and exterior wall finishing mortar of claim 1, wherein: the gypsum is alpha-semi-hydrated gypsum powder or anhydrous gypsum powder, the whiteness is more than or equal to 82, and the particle size is more than or equal to 200 meshes.
5. The saltpetering-free, low-alkalinity, high-fire-resistant interior and exterior wall finishing mortar of claim 1, wherein: the aggregate comprises one or more than two of 40-70 mesh quartz sand, 80-120 mesh quartz sand or 150-200 mesh quartz sand which are optionally mixed.
6. The saltpetering-free, low-alkalinity, high-fire-resistant interior and exterior wall finishing mortar of claim 1, wherein: the whiteness of the mineral filler is more than or equal to 84, the particle size is 150-200 meshes, and the mineral filler comprises one or more than two of coarse whiting powder, zirconia powder, alumina powder or magnesia powder which are randomly mixed.
7. The saltpetering-free, low-alkalinity, high-fire-resistant interior and exterior wall finishing mortar of claim 1, wherein: the thickening agent is one or any mixture of hydroxypropyl methyl cellulose ether or hydroxyethyl methyl cellulose ether, and the viscosity ranges of the hydroxypropyl methyl cellulose ether or the hydroxyethyl methyl cellulose ether are 5000-40000 mPa.S; the length of the wood fiber is 450-550 mu m; the retarder is one or any mixture of tartaric acid and sodium lignosulfonate; the water repellent is a silane water repellent; the air entraining agent is one or more than two of saponins, protein salts or rosin resins which are optionally mixed; the water reducing agent is a polycarboxylic acid water reducing agent; the redispersible latex powder is ethylene-vinyl acetate copolymer rubber powder or ethylene-vinyl acetate-acrylate ternary copolymer latex powder.
8. The saltpetering-free, low-alkalinity, high-fire-resistant interior and exterior wall finishing mortar of claim 2, wherein: the inorganic pigment is an iron oxide pigment.
9. The process for producing a saltpetering-free, low-basicity, high-fire-resistant interior and exterior wall finishing mortar according to any one of claims 1 to 8, wherein: comprises the following steps which are carried out in sequence:
(1) starting the stirrer, adjusting the stirring speed to 55 +/-5 r/min, adding the phosphoaluminate cement, the gypsum and the aggregate accounting for 50-60% of the weight of the phosphoaluminate cement and the gypsum into the stirrer, and uniformly mixing;
(2) keeping the stirring speed of 55 +/-5 r/min, slowly adding a thickening agent, wood fibers, a retarder, a water repellent, an air entraining agent, a water reducing agent and redispersible latex powder into the mixture obtained in the step (1), and uniformly mixing;
(3) and (3) keeping the stirring speed of 55 +/-5 r/min, adding mineral filler and the rest aggregate into the mixture obtained in the step (2), and uniformly mixing to obtain the saltpetering-free low-alkalinity high-fire-resistance inner and outer wall facing mortar.
10. The method for producing a saltpetering-free, low-basicity, high-fire-resistant interior and exterior wall facing mortar according to claim 9, wherein: the inorganic pigment is also added in the step (2).
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