CN117024024A - Cement-based tile adhesive shrinkage-reducing material, preparation method thereof, cement-based tile adhesive and building wall - Google Patents
Cement-based tile adhesive shrinkage-reducing material, preparation method thereof, cement-based tile adhesive and building wall Download PDFInfo
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- CN117024024A CN117024024A CN202311030788.6A CN202311030788A CN117024024A CN 117024024 A CN117024024 A CN 117024024A CN 202311030788 A CN202311030788 A CN 202311030788A CN 117024024 A CN117024024 A CN 117024024A
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- 239000004568 cement Substances 0.000 title claims abstract description 177
- 239000000853 adhesive Substances 0.000 title claims abstract description 110
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 110
- 239000000463 material Substances 0.000 title claims abstract description 84
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 127
- 239000003292 glue Substances 0.000 claims abstract description 85
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 79
- 230000001603 reducing effect Effects 0.000 claims abstract description 73
- 239000002893 slag Substances 0.000 claims abstract description 71
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 53
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 53
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 43
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 24
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 24
- 239000002245 particle Substances 0.000 claims description 27
- 230000000694 effects Effects 0.000 claims description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 21
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 13
- 239000000839 emulsion Substances 0.000 claims description 10
- 238000001354 calcination Methods 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 6
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical compound [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 229940044172 calcium formate Drugs 0.000 claims description 4
- 239000004281 calcium formate Substances 0.000 claims description 4
- 235000019255 calcium formate Nutrition 0.000 claims description 4
- 229920003086 cellulose ether Polymers 0.000 claims description 4
- 239000001095 magnesium carbonate Substances 0.000 claims description 4
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 4
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 4
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 229920002522 Wood fibre Polymers 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical group O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 239000002025 wood fiber Substances 0.000 claims description 3
- 238000006703 hydration reaction Methods 0.000 abstract description 37
- 230000008569 process Effects 0.000 abstract description 30
- 230000036571 hydration Effects 0.000 abstract description 29
- 230000009471 action Effects 0.000 abstract description 7
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 24
- 239000002002 slurry Substances 0.000 description 23
- 239000000047 product Substances 0.000 description 14
- 239000000919 ceramic Substances 0.000 description 11
- 239000011083 cement mortar Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 239000011575 calcium Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000004570 mortar (masonry) Substances 0.000 description 7
- 238000011056 performance test Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 239000013078 crystal Substances 0.000 description 6
- 238000011049 filling Methods 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 235000010755 mineral Nutrition 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 239000000378 calcium silicate Substances 0.000 description 5
- 229910052918 calcium silicate Inorganic materials 0.000 description 5
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 239000004480 active ingredient Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 229910001413 alkali metal ion Inorganic materials 0.000 description 2
- 229910052599 brucite Inorganic materials 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002925 chemical effect Effects 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N naphthalene-acid Natural products C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 125000001624 naphthyl group Chemical group 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 240000000059 Vitex cofassus Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000009347 chasteberry Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- KDLRVYVGXIQJDK-AWPVFWJPSA-N clindamycin Chemical compound CN1C[C@H](CCC)C[C@H]1C(=O)N[C@H]([C@H](C)Cl)[C@@H]1[C@H](O)[C@H](O)[C@@H](O)[C@@H](SC)O1 KDLRVYVGXIQJDK-AWPVFWJPSA-N 0.000 description 1
- 229960002227 clindamycin Drugs 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical group O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000011800 void material 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00637—Uses not provided for elsewhere in C04B2111/00 as glue or binder for uniting building or structural 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application discloses a cement-based tile adhesive shrinkage reducing material, a preparation method thereof, cement-based tile adhesive and a building wall. The cement-based tile glue shrinkage reducing material comprises: slag powder, 100 parts by weight; 40-100 parts by weight of silica fume based on 100 parts by weight of slag powder; light burned magnesia powder with 100 weight portions of slag powder as reference, 20 to 100 weight portions; calcined kaolin with 100 weight parts of slag powder as a reference, 20 to 100 weight parts; 10 to 33.33 parts by weight of reinforcing fibers based on 100 parts by weight of slag powder; and 2-10 parts by weight of a water reducer based on 100 parts by weight of slag powder. The cement-based tile glue shrinkage reducing material provided by the application not only can obviously reduce the shrinkage of the tile glue in the hydration process of cement under the combined action of the components, but also can play a role in reducing shrinkage after solidification, so that the tile glue has a continuous and stable shrinkage reducing effect. And the bonding strength of the later stage of the tile adhesive can be improved.
Description
Technical Field
The application belongs to the technical field of dry powder mortar, and particularly relates to a cement-based tile adhesive shrinkage reducing material, a preparation method thereof, cement-based tile adhesive and a building wall.
Background
Ceramic tiles are plate-like or block-like ceramic products produced from clay and other inorganic nonmetallic materials by molding, sintering and other processes, and are used for decorating or protecting the wall surfaces and the bottom surfaces of buildings and structures. The ceramic tile product has the advantages of corrosion resistance, good stain resistance, easy cleaning, fire resistance and moisture resistance. The product is widely applied to living rooms, kitchens, bathrooms and even external walls and various space surfaces. Tile adhesives are an essential installation material for tile installation, and most of the tile adhesives currently on the market are cement-based products, which are an adhesive, usually a powdered mixture, of cement, sand and other additives for the purpose of increasing adhesion and durability, for securing tiles to walls, floors or other surfaces.
The existing cement-based tile adhesive has the following defects:
1. the cement-based product shrinks itself due to the evaporation of water in the hydration process of cement, and dries and shrinks due to the evaporation of water in the early-stage hardened cement paste, and the product shrinks to cause tile falling off, so that the safety risk is brought;
2. in the actual construction environment, due to the problems of uneven base layer, construction habit of workers and the like, thick paste construction is mostly adopted at the present stage, the construction thickness is 5mm-15mm, and the too thick slurry is easier to cause contraction of the tile adhesive, so that the tile is caused to fall off.
Disclosure of Invention
In order to solve the technical problems, the embodiment of the application provides a cement-based tile glue shrinkage reducing material, which is characterized in that the mineral composition structure of the hardened mortar slurry is improved by selecting slag powder, so that shrinkage is reduced; the compactness and the interface performance of the tile adhesive are improved through the silica fume; the partial shrinkage of the tile glue during hardening is compensated by the delayed volume expansion of the light burned magnesia powder in the cement hydration process, the gap between the tile glue slurry is specifically filled with the calcium silicate gel generated by the added calcined kaolin in the cement hydration process, the porosity of the tile glue is reduced, the microscopic performance is improved, and the shrinkage of the hardened slurry is reduced. And further reduces shrinkage during hardening of the slurry by the reinforcing fibers.
In a first aspect, the present application provides a cement-based tile glue shrinkage reducing material comprising:
slag powder, 100 parts by weight;
40-100 parts by weight of silica fume based on 100 parts by weight of slag powder;
light burned magnesia powder with 100 weight portions of slag powder as reference, 20 to 100 weight portions;
calcined kaolin with 100 weight parts of slag powder as a reference, 20 to 100 weight parts;
10 to 33.33 parts by weight of reinforcing fibers based on 100 parts by weight of slag powder;
and 2-10 parts by weight of a water reducer based on 100 parts by weight of slag powder.
In one embodiment of the present application, a cement-based tile glue shrinkage reducing material comprises:
slag powder, 100 parts by weight;
50-80 parts by weight of silica fume based on 100 parts by weight of slag powder;
30 to 60 parts by weight of light burned magnesia powder based on 100 parts by weight of slag powder;
30 to 60 parts by weight of calcined kaolin based on 100 parts by weight of slag powder;
15-25 parts by weight of reinforcing fibers based on 100 parts by weight of slag powder;
3 to 6 parts by weight of water reducer based on 100 parts by weight of slag powder.
In one embodiment of the application, the slag powder contains 5 to 15 percent of aluminosilicate, the average grain diameter of the aluminosilicate is 30 to 50 mu m, and the density is more than or equal to 2.8g/cm 3 Specific surface area is more than or equal to 400m 2 The activity index per kg is required to satisfy: and the time is more than or equal to 70% in 7 days and more than or equal to 95% in 28 days.
In one embodiment of the application, the slag powder has an average particle size of 30 μm to 40. Mu.m.
In one embodiment of the application, the silica content in the silica fume is more than 95 percent, the average grain diameter is less than or equal to 2 mu m,
in one embodiment of the application, the silica fume preferably has an average particle size of 1.7. Mu.m.
In one embodiment of the application, the content of magnesium oxide in the light burned magnesium oxide powder is more than 95 percent, and the mass fraction of the contained calcium oxide is less than or equal to 1.5 percent.
In one embodiment of the application, the light burned magnesia powder is obtained by calcining magnesite at 800-1000 ℃ and then obtaining the powder.
In one embodiment of the application, the calcined kaolin is powder obtained by sintering kaolin in a calciner to a certain temperature and time and grinding, wherein the average particle diameter is less than or equal to 20 mu m, the silicon dioxide content in the calcined kaolin is less than or equal to 50%, the aluminum oxide content is more than or equal to 35%, the pH value is 5.0-8.0, and the content of the calcined kaolin with the average particle diameter less than 10 mu m is more than or equal to 80%.
In one embodiment of the present application, the calcined kaolin preferably has an average particle size of 10 μm to 20. Mu.m.
In one embodiment of the application, the mass ratio of the slag powder, the silica fume, the light burned magnesia powder and the calcined kaolin is 100:60-70:30-50:30-50, and is optionally 100:61-65:35-45:35-45.
In one embodiment of the application, the reinforcing fibers are selected from wood fibers, polypropylene fibers or combinations thereof, and have a length of 5mm to 10mm.
In one embodiment of the application, the water reducing agent is a naphthalene-based water reducing agent.
In a second aspect, the application provides a method for preparing a cement-based tile glue shrinkage-reducing material, comprising the steps of:
the slag powder, the silica fume, the light burned magnesia, the calcined kaolin, the reinforcing fiber and the water reducing agent are uniformly mixed according to the proportion to prepare the cement-based tile adhesive shrinkage reducing material.
In a third aspect, the present application provides a cement-based tile adhesive comprising:
ash cement, 100 parts by weight;
60-150 parts by weight of river sand based on 100 parts by weight of ash cement;
cellulose ether based on 100 parts by weight of ash cement, 0.4 to 1.2 parts by weight;
1.0 to 2.5 parts by weight of calcium formate based on 100 parts by weight of ash cement;
2.5 to 6.5 parts by weight of redispersible emulsion powder based on 100 parts by weight of cement;
2.5 to 10 parts by weight of the cement-based tile glue shrinkage reducing material based on 100 parts by weight of cement.
In a fourth aspect, the present application provides a building wall comprising a filler filled in a gap between a cementitious tile and a building or structure, the filler being cured from a cementitious tile glue comprising a cementitious tile glue reducing material as described above.
The cement-based tile glue shrinkage reducing material provided by the embodiment of the application has the advantages that the mineral composition structure of the hardened mortar slurry is improved by selecting slag powder, so that shrinkage is reduced; the compactness and interface performance of the tile adhesive are improved through the silica fume, partial shrinkage of the tile adhesive during hardening is compensated through the delayed volume expansion of the light burned magnesia powder in the cement hydration process, the shrinkage is reduced, the gaps of the tile adhesive slurry are specifically filled with the calcium silicate gel generated by the added calcined kaolin in the cement hydration process, the porosity of the tile adhesive is reduced, the microscopic performance is improved, and the shrinkage of the hardened slurry is reduced. And further reduces shrinkage during hardening of the slurry by the reinforcing fibers. The cement-based tile glue shrinkage reducing material provided by the application can not only obviously reduce shrinkage of the tile glue in the hydration process of cement under the combined action of the components, but also play a role in reducing shrinkage after solidification, so that the tile glue has a continuous and stable shrinkage reducing effect. In addition, the cement-based tile adhesive shrinkage reducing material of the silicon can also improve the bonding strength of the later stage of tile adhesive.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings that are needed to be used in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.
Fig. 1 is a schematic flow chart of a method for preparing a cement-based tile glue shrinkage reducing material according to an embodiment of the present application.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the particular embodiments described herein are meant to be illustrative of the application only and not limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by showing examples of the application.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
It is known to those skilled in the art that there is an initial hydration shrinkage of cement, i.e., there is a hydration shrinkage of cement in the process from slurry to hardened body, and a later drying shrinkage, i.e., the hardened body shrinks itself. The application mainly aims at the field of cement-based tile installation, the tile is not generally fallen off in the initial stage of tile installation, but the shrinkage generated after the cement-based binding material is hardened causes stress to be generated on the interface of the tile with the increase of time, so that the tile falls off. The existing method for solving the defect is to add redispersible emulsion powder, reduce later shrinkage through entanglement of polymer and cement, but the redispersible emulsion powder is relatively expensive, which is not beneficial to popularization and application of cement-based tile adhesive.
In order to solve the problems in the prior art, the embodiment of the application provides a cement-based tile adhesive shrinkage reducing material, which can effectively slow down shrinkage of cement-based tile adhesive by adding the components after compounding, can greatly reduce doping amount of redispersion emulsion powder and effectively reduce cost. And the material components adopted by the application are mostly industrial byproducts, the price is low, the environment protection is facilitated, and the conservation-oriented society is constructed.
The cement-based tile glue shrinkage reducing material provided by the embodiment of the application is first described below.
In a first aspect, the present application provides a cement-based tile glue shrinkage reducing material comprising:
slag powder, 100 parts by weight;
40-100 parts by weight of silica fume based on 100 parts by weight of slag powder;
light burned magnesia powder with 100 weight portions of slag powder as reference, 20 to 100 weight portions;
calcined kaolin with 100 weight parts of slag powder as a reference, 20 to 100 weight parts;
10 to 33.33 parts by weight of reinforcing fibers based on 100 parts by weight of slag powder;
and 2-10 parts by weight of a water reducer based on 100 parts by weight of slag powder.
In one embodiment of the present application, a cement-based tile glue shrinkage reducing material comprises:
slag powder, 100 parts by weight;
50-80 parts by weight of silica fume based on 100 parts by weight of slag powder;
30 to 60 parts by weight of light burned magnesia powder based on 100 parts by weight of slag powder;
30 to 60 parts by weight of calcined kaolin based on 100 parts by weight of slag powder;
15-25 parts by weight of reinforcing fibers based on 100 parts by weight of slag powder;
3 to 6 parts by weight of water reducer based on 100 parts by weight of slag powder.
The cement-based tile glue shrinkage reducing material provided by the embodiment of the application has the advantages that the mineral composition structure of the hardened mortar slurry is improved by selecting slag powder, so that shrinkage is reduced; the compactness and the interface performance of the tile adhesive are improved through the silica fume; the partial shrinkage of the tile glue during hardening is compensated by the delayed volume expansion of the light burned magnesia powder in the cement hydration process, the gap between the tile glue slurry is specifically filled with the calcium silicate gel generated by the added calcined kaolin in the cement hydration process, the porosity of the tile glue is reduced, the microscopic performance is improved, and the shrinkage of the hardened slurry is reduced. And further reduces shrinkage during hardening of the slurry by the reinforcing fibers. The cement-based tile glue shrinkage reducing material provided by the application can not only obviously reduce shrinkage of the tile glue in the hydration process of cement under the combined action of the components, but also play a role in reducing shrinkage after solidification, so that the tile glue has a continuous and stable shrinkage reducing effect. In addition, the cement-based tile adhesive shrinkage reducing material can also improve the bonding strength of the tile adhesive in the later curing period.
The curing of cement is divided into three stages of hydration, setting and hardening, and the later curing stage refers to the hardening stage.
The cement-based tile glue shrinkage reducing material provided by the embodiment of the application has the advantages of wide raw material sources, simple and convenient preparation process and suitability for industrialized mass production.
In one embodiment of the application, the slag powder contains 5 to 15 percent of aluminosilicate, the average grain diameter of the aluminosilicate is 30 to 50 mu m, and the density is more than or equal to 2.8g/cm 3 Specific surface area is more than or equal to 400m 2 The activity index per kg is required to satisfy: the activity index of the slag powder after seven days is required to be more than or equal to 70% after 7 days and more than or equal to 95% after 28 days, and the activity of the slag powder after 28 days is more than or equal to 95%.
In one embodiment of the application, the slag powder has an average particle size of 30 μm to 40. Mu.m.
In the application, slag powder is powder with a certain cement activity, which is produced by crushing byproducts taking aluminosilicate as a main component and generated during steel smelting, and does not react with water, but the application has the effect of improving the mineral composition structure of the hardened mortar slurry, namely, the cement activity of the slag powder is utilized to participate in the reaction in the hydration process of the tile glue cement, so that the tile glue has plasticity; meanwhile, the powder gaps are utilized to improve the bleeding of cement, accelerate hydration heat release speed, help to prevent cracks caused by heating inside the tile adhesive, and generate more ettringite microcrystals so as to compensate the shrinkage of the tile adhesive caused by excessive fine powder. The crushed slag powder is screened by using a screen with the mesh number of 400 meshes or more than 400 meshes to obtain the slag powder used by the application.
In one embodiment of the application, the silica content in the silica fume is more than 95 percent, the average grain diameter is less than or equal to 2 mu m,
in one embodiment of the application, the silica fume preferably has an average particle size of 1.7. Mu.m.
In the application, the silica fume has the effects of improving the compactness of the tile adhesive and improving the interface performance of the tile adhesive. The method is characterized in that in the process of smelting industrial silicon and ferrosilicon at high temperature by an industrial electric furnace, dust escaping with waste gas is collected and treated by a collecting device to form powder, the dust escaping with the waste gas is collected and treated by the collecting device, and the powder is screened by using a screen with 1500 meshes or more than 1500 meshes to obtain the silica fume used by the method. Silica fume mainly has the following three functions in the cement hydration process:
pozzolanic effect, that is, silica fume, after contact with water, a portion of which is gradually dissolved by the action of water and hydrated with cement to produce Ca (OH) 2 Hydration reaction is carried out to generate hydration product C-S-H gel, and the C-S-H gel has the characteristics of extremely developed pores, large specific surface area, strong surface activity and extremely poor crystallization degree, so that the crystallization degree is still improved slightly after a long time, the compactness of the tile glue is improved by utilizing the characteristic of poor crystallization degree, the shrinkage of the tile glue is prevented, and the interface performance of the tile glue cement is improved by utilizing the characteristic of strong surface activity of the tile glue;
the filling effect is that the average grain diameter of the silica fume particles is about 1-2 orders of magnitude smaller than the grain diameter of the cement particles, and the silica fume particles can be effectively filled in the gaps among the cement particles, and the filling effect is mainly used for filling the gaps among the cement particles, and is similar to the gaps among the coarse aggregates filled with concrete fine aggregates, namely, the silica fume can reduce the porosity of the cement mortar from the microcosmic aspect of the pore structure, so that the compactness and strength of the cement mortar are improved;
the chemical effect of the void solution means that the active ingredient SiO of the silica fume is increased along with the doping amount of the silica fume in the cement mortar 2 The reaction with the C-S-H gel, which is the product of the cement hydration reaction, produces another C-S-H gel having a lower Ca/Si value, however, a decrease in Ca/Si value will directly result in the incorporation of the silica tetrahedra in the C-S-H gel with other ions in the slurry, such as alkali metal ions (Na + 、K + ) Or aluminum ion (Al) 3+ ) Thus, the content of other ions in the slurry is greatly reduced, and a pore solution chemical effect is formed. Increasing the doping amount of the silica fume can reduce the pH value of the pore solution in the slurry, namely the active ingredient SiO of the silica fume 2 With hydration product Ca (OH) 2 The alkali metal ions undergo chemical reaction to reduce the alkalinity of the solution, which is beneficial to reducing or even eliminating the harm caused by the alkali-silicic acid reaction, namely reducing the shrinkage caused by the alkali-silicic acid reaction.
In one embodiment of the application, the content of magnesium oxide in the light burned magnesium oxide powder is more than 90 percent, the average particle size is less than or equal to 13.5 mu m, and the mass fraction of the contained calcium oxide is less than or equal to 1.5 percent.
In one embodiment of the application, the light burned magnesia powder is magnesia powder produced by a special process, and is powder obtained by calcining magnesite in a rotary kiln at 800-1000 ℃ for 5-10 minutes and then carrying out powder production. The light burned magnesia powder used in the present application may be obtained by sieving the calcined magnesite powder with a sieve of 1000 mesh or more.
In the application, the expansion mechanism of the light burned magnesia powder is as follows: magnesium oxide reacts with water to form brucite, which causes volume expansion, and the chemical reaction formula is as follows:
the magnesium oxide has the characteristic of delaying expansion during the hydration of cement, so that the tile adhesive generates certain micro-expansion performance during the hydration hardening process of cement, so as to compensate partial shrinkage during the hardening of the tile adhesive, and achieve the purpose of reducing shrinkage cracking.
Magnesium oxide affects the volume change of cement in the setting and hardening process, and the content of the magnesium oxide cement is definitely limited in the national standard of silicate cement. The inventor of the present application found in the process of improving and obtaining the technical scheme of the present application: the light burned magnesia powder can utilize the volume change characteristic of the light burned magnesia powder in the setting and hardening process to improve the drying shrinkage problem of cement-based tile glue, and magnesia can participate in the hydration process of cement to generate special complex, and has the characteristic of delaying expansion by itself, wherein the mechanism is that magnesia reacts with water to generate brucite to cause volume expansion.
In one embodiment of the application, the calcined kaolin is powder obtained by sintering kaolin in a calciner to a certain temperature and time and grinding, wherein the average particle diameter is less than or equal to 20 mu m, the silicon dioxide content in the calcined kaolin is less than or equal to 50%, the aluminum oxide content is more than or equal to 35%, the pH value is 5.0-8.0, and the content of the calcined kaolin with the average particle diameter less than 10 mu m is more than or equal to 80%. The calcination temperature of the calcined kaolin is 970-990 ℃ and the calcination time is 30-40 minutes.
In one embodiment of the present application, the calcined kaolin further optionally has an average particle size of from 10 μm to 20. Mu.m.
In the cement-based tile glue shrinkage reducing material provided by the embodiment of the application, the calcined kaolin obtained by calcining the kaolin has a changed physical and chemical structure, and the calcined kaolin and hydration products of cement such as hydrated calcium silicate gel of cement generated by hydration of tile glue cement specifically fill gaps of tile glue paste, so that the porosity is reduced, the microscopic performance is improved, the shrinkage of the hardened paste is reduced, and the reduction of the porosity can be embodied by the shrinkage rate. The calcined kaolin used in the present application may be obtained by screening the kaolin with a 600 mesh or more than 600 mesh screen after calcination.
The calcined kaolin can effectively increase the strength of cement-based ceramic tile mortar and improve the durability, and mainly has the following three effects:
the filling effect is that the particle size of the calcined kaolin particles is about an order of magnitude smaller than that of the cement particles, and the calcined kaolin particles are filled in gaps of cement paste, so that the gap filling effect can be realized in cement mixed mortar. On the other hand, the hydration product generated by the hydration reaction of the cement and the cement, namely the hydrated calcium silicate gel, has the effect of filling gaps of cement hardening slurry, reduces the porosity of the cement slurry, improves the microstructure of the cement mortar, refines the pore structure, improves the compactness of the cement mortar, and is beneficial to the improvement of the early-stage and later-stage strength and the durability of the cement mortar;
accelerating the hydration reaction effect of cement, and the calcined kaolin is mainly prepared from active ingredient SiO 2 、Al 2 O 3 The formed mineral admixture has a thermodynamic metastable structure, so the mineral admixture has higher volcanic ash activity, especially under the condition of alkali excitation, the metastable structure of calcined kaolin is combined with other ions under the alkaline condition to generate a net structure; adding proper amount of calcined kaolin into cement mortar, wherein a great amount of SiO exists in the calcined kaolin 2 、Al 2 O 3 The active ingredients react with calcium hydroxide which is a product generated by the hydration reaction of the cement to generate pozzolanic reaction, so that the promotion effect on the hydration reaction of the cement is realized;
pozzolanic effect, the transition zone between hydrated slurry and aggregate in cement mortar is due to the aggregation of a large amount of Ca (OH) 2 The crystal becomes a weak link, and the transition area between the polymer interface and the aggregate in the cement mortar can be obviously improved by doping calcined kaolin in the cement mortar; calcined kaolin has a relatively large surface energy due to the presence of a large number of broken chemical bonds which are capable of absorbing a portion of Ca (OH) relatively rapidly 2 The crystals and the crystals undergo secondary hydration reaction to generate more C-S-H gel, so that transitional Ca (OH) is reduced 2 The degree of crystal orientation of the crystals and reduced Ca (OH) 2 Crystal grainThe size and the content of the other components in the hydration slurry are beneficial to the improvement of the mechanical property and the durability of the formed cement concrete.
In one embodiment of the application, the mass ratio of the slag powder, the silica fume, the light burned magnesia powder and the calcined kaolin is 100:60-70:30-50:30-50, and is optionally 100:61-65:35-45:35-45. The slag powder, the silica fume, the light burned magnesia powder and the calcined kaolin can obtain more excellent shrinkage reduction performance after adopting the mass ratio.
In one embodiment of the application, the reinforcing fibers are selected from wood fibers, polypropylene fibers or combinations thereof, having a length of 5mm to 10mm, optionally 7mm to 9mm. The reinforcing fiber can form a three-dimensional network structure in the cement-based tile adhesive, improves the physical and mechanical properties of the cement-based tile adhesive, has a certain tensile stress on hydration shrinkage of the tile adhesive cement, and can reduce shrinkage in the hardening process of slurry.
In one embodiment of the application, the water reducing agent is a naphthalene-based water reducing agent. The naphthalene water reducer has low price and can reduce the water consumption of the tile adhesive. The naphthalene water reducer is naphthalene sulfonate formaldehyde condensate.
In the embodiment of the application, the addition of the reinforcing fiber and the water reducing agent can enhance the toughness and the plasticity of the tile adhesive and reduce the shrinkage of the tile adhesive.
The cement-based tile adhesive shrinkage reducing material provided by the embodiment of the application is prepared from a plurality of inorganic materials, wherein slag powder, silica fume, light burned magnesia powder, calcined kaolin and the like are cheap and easy to obtain, and the materials have synergistic effects, so that the shrinkage problem of the tile adhesive can be effectively reduced, and the quality and the service life of the tile are ensured.
In addition, the slag powder, the silica fume and the calcined kaolin have certain cement activity, and the hydrate particle groups of the calcium cement generated by utilizing partial cement reaction in the hydration process of the cement play a role in forming a net structure, so that the shrinkage of the cement-based tile adhesive is reduced in the drying and curing process. The light burned magnesia powder cement has the characteristic of delayed expansion during hydration, so that the tile adhesive has certain micro expansion performance during the hydration hardening process of the cement, and the partial shrinkage of the tile adhesive during hardening is compensated, thereby achieving the purpose of reducing shrinkage cracking.
In a second aspect, fig. 1 shows a schematic flow chart of a method for preparing a cement-based tile glue shrinkage-reducing material according to an embodiment of the present application. As shown in fig. 1, the application provides a preparation method of a cement-based tile glue shrinkage reducing material, which comprises the following steps:
s1, uniformly mixing slag powder, silica fume, light burned magnesia, calcined kaolin, reinforcing fiber and a water reducing agent according to a proportion to prepare the cement-based tile adhesive shrinkage reducing material.
The preparation method of the cement-based tile adhesive shrinkage-reducing material is simple and easy to operate, and the prepared cement-based tile adhesive shrinkage-reducing material can be added into tile adhesive cement in a construction site or in factory production.
In a third aspect, embodiments of the present application provide a cement-based tile adhesive comprising:
ash cement, 100 parts by weight;
60-150 parts by weight of river sand based on 100 parts by weight of ash cement;
cellulose ether based on 100 parts by weight of ash cement, 0.4 to 1.2 parts by weight;
1.0 to 2.5 parts by weight of calcium formate based on 100 parts by weight of ash cement;
2.5 to 6.5 parts by weight of redispersible emulsion powder based on 100 parts by weight of cement;
2.5 to 6.5 parts by weight of the cement-based tile glue shrinkage reducing material based on 100 parts by weight of cement.
The cement-based tile adhesive shrinkage reducing material provided by the embodiment of the application can reduce the consumption of redispersible emulsion powder in the tile adhesive after being applied to cement-based tile adhesive, thereby saving the cost.
The cement-based tile adhesive shrinkage reducing material can be added into finished tile adhesives as an external admixture at a construction site or added into ready-mixed tile adhesives during production.
Cement-based tile adhesives are composed of a variety of organic and inorganic nonmetallic materials that will form cross-entanglement of various materials during the hydration reaction of the cement, such as silicate products, organic polymers, aggregates, fibers, and the like, forming a variety of complex multiphase junctions between them.
In a fourth aspect, the present application provides a building wall comprising a filler filled in a gap between a cementitious tile and a building or structure, the filler being cured from or containing a cementitious tile glue reducing material as described above.
Illustratively, the cement-based tile adhesives containing the cement-based tile adhesive shrinkage reducing materials described above are applied to the surfaces of a building, such as walls, floors, ceilings and other surfaces where tiling is desired; or coating the surface of a single column, a wall body, a semi-closed or fully-closed storage space and the like, which need to be tiled, such as the surface of a water storage tank and a liquid storage tank, and then tiling to obtain the building wall body.
The application will be described in detail below by way of examples. In the following examples, unless otherwise specified, all the starting materials mentioned are commercially available.
Slag powder: s95 grade, wherein the average grain diameter is 60 mu m, jingzhou Wanshan environmental protection materials Co., ltd;
silica fume: silica content 95%, average particle size 8 μm, clindamycin company, spring;
light burned magnesia powder: the content of magnesium oxide is more than 90%, the particle size is more than 1000 meshes, and the Kyurt New material Co., guangzhou City is available;
calcining kaolin: the average grain diameter is 10-20 mu m, and the Yuan Kun mining Co Ltd;
reinforcing fibers: polypropylene fiber with length of 8mm, guangzhou Jian Pabao building materials Co., ltd;
water reducing agent: YS-10, guangzhou Jian Paburg building materials Co., ltd.
The following are tile adhesives and cement materials comprising the cement-based tile adhesive shrinkage reducing material:
ceramic tile adhesive: products meeting JC/T547-2017 standard C1 grade, the following examples use Keshun C301 tile adhesive;
ash cement: PO42.5, ge Zhou, vitex Cement Co., ltd;
river sand: 50-100 meshes, hubei Pengyuan New Material Co., ltd;
redispersible emulsion powder: 5010N, wake chemical (China);
cellulose ether: HD110, shandong herda group, inc;
early strength agent: calcium formate, guangzhou Jian Pabao building materials Co., ltd.
Examples
Example 1
The cement-based tile glue shrinkage reducing material comprises the following components in percentage by mass: 40wt.% of slag powder, 25wt.% of silica fume, 15wt.% of light burned magnesia powder, 11wt.% of calcined kaolin, 7wt.% of reinforcing fiber and 2wt.% of water reducer.
A method for preparing a cement-based tile glue shrinkage reducing material, comprising the following steps:
and uniformly mixing slag powder, silica fume, light burned magnesia powder, calcined kaolin, reinforcing fiber and a water reducing agent to obtain the ceramic tile glue shrinkage reducing material.
Table 1 below shows the ingredients and performance test results of comparative example 1 and application examples 1-1 to 1-3, wherein application examples 1-1, 1-2, 1-3 are based on Kocis C301 tile glue, with 1%, 3% and 5% of the cement-based tile shrinkage reducing material prepared in example 1, respectively, being added, based on the total weight of the tile glue; comparative example 1 the same Kongshun C301 tile glue was used as in example 1, but without the addition of the cement-based tile glue shrinkage reducing material prepared in example 1.
The tile adhesives of comparative example 1 and the tile adhesives of application examples 1-1 to 1-3 were then subjected to performance tests, wherein each performance test item was tested with reference to the standards JC/T547-2017 ceramic tile adhesive and JC/T1004-2017 ceramic tile adhesive.
Table 1 results of Performance test of comparative example 1 and application examples 1-1 to 1-3
From the test results in Table 1, it is understood that, compared with the tile glue of comparative example 1, in which the cement-based tile glue shrinkage-reducing material prepared in example 1 was not added, the shrinkage value of the tile glue can be reduced by adding 1% of the cement-based tile glue shrinkage-reducing material prepared in example 1, the shrinkage value of 3.0mm/m of the tile glue of comparative example 1 is reduced to 1.7mm/m, and the reduction range reaches 43.33%; the shrinkage value of the tile glue can be reduced by adding 3% of the cement-based tile glue shrinkage reducing material prepared in the example 1, the shrinkage value of the tile glue of the comparative example 1 is reduced to 1.2mm/m, and the reduction range reaches 60%; the shrinkage value of the tile glue can be reduced by adding 5% of the cement-based tile glue shrinkage reducing material prepared in the embodiment 1, the shrinkage value of the tile glue of the comparative example 1 is reduced to 1.0mm/m, and the reduction range reaches 66.67%, which indicates that the cement-based tile glue shrinkage reducing material in the embodiment of the application can effectively reduce the shrinkage value of the tile glue.
Compared with the tile glue of comparative example 1, which is not added with the cement-based tile glue shrinkage reducing material prepared in example 1, the tile glue of comparative example 1 and the tile glue of application examples 1-1 to 1-3 have the bonding strength of about 0.8MPa after curing for 3 days, and the bonding strength of the cement-based tile glue of application examples 1-3 only reaches 0.9MPa. The cement-based tile adhesive shrinkage reducing material prepared in the application example 1-1 is added with 1% of the cement-based tile adhesive shrinkage reducing material prepared in the embodiment 1, so that the bonding strength of the tile adhesive in the later curing period can be effectively improved, the bonding strength of 0.7MPa of the tile adhesive in the comparative example 1 is improved to 0.9MPa, and the improvement range is 28.57%; the addition of 3% of the cement-based tile adhesive shrinkage-reducing material prepared in the embodiment 1 can improve the bonding strength of the tile adhesive in the later curing period, the bonding strength of the tile adhesive of the comparative example 1 is improved to 1.0MPa, and the improvement range reaches 42.86%; the bonding strength of the tile adhesive can be improved by adding 5% of the cement-based tile adhesive shrinkage-reducing material prepared in the embodiment 1, the bonding strength of the tile adhesive of the comparative example 1, namely 0.7MPa, is improved to 1.0MPa, and the improvement range reaches 42.86%, so that the cement-based tile adhesive shrinkage-reducing material provided by the embodiment of the application can effectively improve the bonding strength of the tile adhesive.
By comparing the experimental data, the cement-based tile adhesive shrinkage reducing material of the embodiment of the application is added into the finished cement-based tile adhesive, so that the shrinkage value of the tile adhesive can be obviously reduced, and the later bonding strength of the tile adhesive can be improved.
Example 2
The cement-based tile glue shrinkage reducing material comprises the following components in percentage by mass:
35wt.% of slag powder, 30wt.% of silica fume, 12wt.% of light burned magnesia powder, 15wt.% of calcined kaolin, 5wt.% of reinforcing fiber and 3wt.% of water reducer.
A method for preparing a cement-based tile glue shrinkage reducing material, comprising the following steps:
and uniformly mixing slag powder, silica fume, light burned magnesia powder, calcined kaolin, reinforcing fiber and a water reducing agent to obtain the cement-based tile adhesive shrinkage reducing material.
Table 2 below is a formulation table and performance test results table for comparative example 2 and application examples 2-1 to 2-5, wherein comparative example 2 and application examples 2-1 to 2-5 each use a ready-mix tile glue, but the ready-mix tile glue of comparative example 2 did not add the cement-based tile glue shrinkage reducing material prepared in example 2; application examples 2-1, 2-2, 2-3, 2-4 and 2-5 are based on ready-mixed tile adhesives, and 2%, 4%, 6% and 6% of the cement-based tile shrinkage reducing materials prepared in example 2 are added respectively, wherein the addition amounts are calculated by the total weight of the tile adhesives. The ready-mix tile glue included the components shown in table 2 in the amounts of comparative example 2 and application examples 2-1 to 2-5, respectively.
The ready-mixed tile adhesives of comparative example 2 and application examples 2-1 to 2-3 were then individually subjected to performance testing, wherein each performance test item was tested with reference to the standards JC/T547-2017 ceramic tile adhesive and JC/T1004-2017 ceramic tile adhesive.
Table 2 comparative example 2 and formulation and performance test results table for tile adhesives using lithium 2-1 to 2-5
Comparison of comparative example 2 and application examples 2-1 to 2-5 in table 2 can be made:
as can be seen from comparison of the test results of the shrinkage values of the tile adhesives of comparative example 2 and application examples 2-1, 2-2 and 2-4, the shrinkage value of the tile adhesive can be reduced by adding the cement-based tile of example 2 of the present application to the ready-mixed tile adhesive in an amount of 2 to 6wt.%, so that the shrinkage value of the ready-mixed tile adhesive is reduced by at least 51.21% from the shrinkage value of the tile adhesive of comparative example 2, which is 4.1mm/m without the cement-based tile adhesive shrinkage material prepared in example 2, to the shrinkage value of the tile adhesive of 1.1mm/m to 2.0mm/m after the cement-based tile adhesive shrinkage material prepared in example 2 is added; and meanwhile, the bonding strength of the ceramic tile adhesive is improved.
As can be seen from the comparison of the test results of the bonding strength of the tile adhesive of comparative example 2 and application examples 2-2 and 2-3, the cement-based tile adhesive shrinkage reducing material of the embodiment 2 of the application is added into the ready-mixed tile adhesive with low redispersible emulsion powder content, and the bonding strength of the tile adhesive in the later stage can be improved on the premise of meeting the bonding strength. Therefore, the cement-based tile adhesive shrinkage reducing material provided by the embodiment of the application can reduce the consumption of the redispersible emulsion powder and save the cost.
As can be seen from comparison of the component contents of comparative example 2 and application examples 2-4 and 2-5, the cement-based tile adhesive shrinkage reducing material of the embodiment of the application is added into the tile adhesive, and part of gray cement can be replaced on the premise of meeting the bonding strength index, so that the consumption of cement is reduced and the cost is saved.
In the foregoing, only the specific embodiments of the present application are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process described above may refer to the corresponding process in the foregoing method embodiment, which is not repeated herein. It should be understood that the scope of the present application is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present application, and they should be included in the scope of the present application.
Claims (10)
1. A cement-based tile glue shrinkage reducing material, comprising:
slag powder, 100 parts by weight;
40-100 parts by weight of silica fume based on 100 parts by weight of slag powder;
light burned magnesia powder with 100 weight portions of slag powder as reference, 20 to 100 weight portions;
calcined kaolin with 100 weight parts of slag powder as a reference, 20 to 100 weight parts;
10 to 33.33 parts by weight of reinforcing fibers based on 100 parts by weight of slag powder;
and 2-10 parts by weight of a water reducer based on 100 parts by weight of slag powder.
2. The cement-based tile glue shrinkage reducing material of claim 1, comprising:
slag powder, 100 parts by weight;
50-80 parts by weight of silica fume based on 100 parts by weight of slag powder;
30 to 60 parts by weight of light burned magnesia powder based on 100 parts by weight of slag powder;
30 to 60 parts by weight of calcined kaolin based on 100 parts by weight of slag powder;
15-25 parts by weight of reinforcing fibers based on 100 parts by weight of slag powder;
3 to 6 parts by weight of water reducer based on 100 parts by weight of slag powder.
3. The shrinkage reducing material for cement-based tile adhesives according to claim 1 or 2, wherein the slag powder contains 5% -15% of aluminosilicate having an average particle diameter of 30 μm to 50 μm and a density of not less than 2.8g/cm 3 Specific surface area is more than or equal to 400m 2 The activity index per kg is required to satisfy: the day is more than or equal to 70 percent, and the day is more than or equal to 95 percent after 7 days; and/or
The silicon dioxide content in the silica fume is more than 95 percent, and the average grain diameter is less than or equal to 2 mu m; and/or
The content of magnesium oxide in the light burned magnesium oxide powder is more than 95%, the average grain diameter is less than or equal to 13.5 mu m, the mass fraction of calcium oxide contained in the light burned magnesium oxide powder is less than or equal to 1.5%, and the light burned magnesium oxide powder is powder obtained by calcining magnesite at 800-1000 ℃; and/or
The average grain diameter of the calcined kaolin is less than or equal to 20 mu m, the silicon dioxide content in the calcined kaolin is less than or equal to 50%, the aluminum oxide content is more than or equal to 35%, the pH value is 5.0-8.0, and the content of the calcined kaolin with the average grain diameter smaller than 10 mu m is more than or equal to 80%; and/or
The reinforcing fiber is selected from wood fiber, polypropylene fiber or a combination thereof, and the length of the reinforcing fiber is 5 mm-10 mm; and/or
The water reducer is naphthalene water reducer.
4. A cement-based tile glue shrinkage reducing material according to claim 3, wherein the slag powder has an average particle size of 30 μm to 40 μm.
5. A cement-based tile glue shrinkage reducing material according to claim 3, wherein the silica fume has an average particle size of 1.7 μm or less.
6. A cement-based tile glue shrinkage reducing material according to claim 3, wherein the calcined kaolin has an average particle size of from 10 μm to 20 μm.
7. The cement-based tile glue shrinkage reducing material according to claim 3, wherein the mass ratio of slag powder, silica fume, light burned magnesia powder and calcined kaolin is 100:60-70:30-50: 30-50.
8. A method of preparing a cement-based tile glue shrinkage reducing material as defined in any one of claims 1 to 7, comprising:
and uniformly mixing the slag powder, the silica fume, the light burned magnesia, the calcined kaolin, the reinforcing fiber and the water reducing agent according to a proportion to prepare the cement-based tile adhesive shrinkage reducing material.
9. A cement-based tile adhesive, comprising:
ash cement, 100 parts by weight;
60-150 parts by weight of river sand based on 100 parts by weight of ash cement;
cellulose ether based on 100 parts by weight of ash cement, 0.4 to 1.2 parts by weight;
1.0 to 2.5 parts by weight of calcium formate based on 100 parts by weight of ash cement;
2.5 to 6.5 parts by weight of redispersible emulsion powder based on 100 parts by weight of cement;
the cement-based tile glue shrinkage reducing material according to any one of claims 1 to 7, 2.5 to 10 parts by weight based on 100 parts by weight of gray cement.
10. A building wall comprising a filler filled in a gap between a cement-based tile and a building or structure, the filler being obtained by cement-based tile glue curing comprising a cement-based tile glue reducing material as claimed in any one of claims 1 to 7.
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