CN117326809A - Cementing material, hydraulic binding material, preparation method, slurry and building component - Google Patents
Cementing material, hydraulic binding material, preparation method, slurry and building component Download PDFInfo
- Publication number
- CN117326809A CN117326809A CN202310815588.5A CN202310815588A CN117326809A CN 117326809 A CN117326809 A CN 117326809A CN 202310815588 A CN202310815588 A CN 202310815588A CN 117326809 A CN117326809 A CN 117326809A
- Authority
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- China
- Prior art keywords
- cement
- binding material
- gypsum
- hydraulic binding
- slag
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- 239000000463 material Substances 0.000 title claims abstract description 84
- 239000002002 slurry Substances 0.000 title claims abstract description 7
- 238000002360 preparation method Methods 0.000 title description 4
- -1 preparation method Substances 0.000 title description 2
- 239000004568 cement Substances 0.000 claims abstract description 53
- 239000010440 gypsum Substances 0.000 claims abstract description 41
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 41
- 239000002893 slag Substances 0.000 claims abstract description 36
- 239000000654 additive Substances 0.000 claims abstract description 20
- 230000000996 additive effect Effects 0.000 claims abstract description 17
- 239000000945 filler Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical group [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 14
- 239000004576 sand Substances 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 12
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 7
- 239000011398 Portland cement Substances 0.000 claims description 7
- 150000004683 dihydrates Chemical class 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 6
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000000839 emulsion Substances 0.000 claims description 6
- 239000006028 limestone Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical compound [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 claims description 4
- 235000019255 calcium formate Nutrition 0.000 claims description 4
- 239000004281 calcium formate Substances 0.000 claims description 4
- 229940044172 calcium formate Drugs 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 4
- 235000012255 calcium oxide Nutrition 0.000 claims description 4
- 229920003086 cellulose ether Polymers 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- 239000004111 Potassium silicate Substances 0.000 claims description 3
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 3
- 150000004645 aluminates Chemical class 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- 235000011148 calcium chloride Nutrition 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 229910052570 clay Inorganic materials 0.000 claims description 3
- 239000004816 latex Substances 0.000 claims description 3
- 229920000126 latex Polymers 0.000 claims description 3
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 3
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 3
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims description 3
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- 239000012744 reinforcing agent Substances 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 238000000518 rheometry Methods 0.000 claims description 2
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims 1
- 239000000047 product Substances 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000006227 byproduct Substances 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910052925 anhydrite Inorganic materials 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 229910052661 anorthite Inorganic materials 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- GWWPLLOVYSCJIO-UHFFFAOYSA-N dialuminum;calcium;disilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] GWWPLLOVYSCJIO-UHFFFAOYSA-N 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- YLGXILFCIXHCMC-JHGZEJCSSA-N methyl cellulose Chemical compound COC1C(OC)C(OC)C(COC)O[C@H]1O[C@H]1C(OC)C(OC)C(OC)OC1COC YLGXILFCIXHCMC-JHGZEJCSSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000004127 vitreous body Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
-
- 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
- C04B11/00—Calcium sulfate cements
- C04B11/28—Mixtures thereof with other inorganic cementitious materials
- C04B11/30—Mixtures thereof with other inorganic cementitious materials with hydraulic cements, e.g. 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Architecture (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a hydraulic binding material, which comprises 25-40wt.% of cementing material, 0-20wt.% of filler, 50-70wt.% of aggregate and 0-5wt.% of additive. The cementing material comprises 70-90wt.% slag, 5-30wt.% cement and 0-20wt.% gypsum. The invention also provides a method for preparing the hydraulic binding material and a slurry formed by the hydraulic binding material, and further provides a building component prepared by the hydraulic binding material or the hydraulic binding material. In the technical scheme provided by the invention, slag is used for replacing most of cement to keep the performance equivalent to that of the traditional formula, and the consumption of cement is reduced, so that the energy consumption and carbon emission of manufactured products are reduced, and the pollution to the environment can be reduced by using blast furnace byproducts.
Description
Technical Field
The invention relates to the field of building materials, in particular to a cementing material, a hydraulic binding material containing the cementing material, a preparation method of the hydraulic binding material, slurry and a building member.
Background
In the field of building materials, adhesive materials have wide application. For example, for bonding panels, tiles, etc. Typically such binding materials are compositions whose main component is cement. For example, the mass ratio of cement may be as high as 80-90% or even more.
However, since a lot of energy is consumed in the preparation process of cement and a great pollution is caused. For emission reduction, environmental protection purposes, there is a continuing need in the art to reduce the cement used in the cementitious material until it is completely replaced.
Granulated blast furnace slag, commonly referred to as slag, is a slag produced when iron and steel plants smelt pig iron. In the blast furnace ironmaking process, in addition to iron ore and fuel (coke), a proper amount of limestone and dolomite are added as fluxes for lowering the smelting temperature. The calcium oxide, magnesium oxide, waste ore in iron ore and ash in coke obtained by decomposing them in a blast furnace are melted to form a molten mass mainly composed of silicate and aluminosilicate, the molten mass floats on the surface of molten iron, and the molten mass is periodically discharged from a slag discharge port and subjected to air or water quenching treatment to form granular particles called slag. In general, slag contains more than 95% of vitreous body and dicalcium silicate, anorthite, wollastonite and other minerals, which are close to cement components.
Disclosure of Invention
The object of the present invention is to use a high proportion of slag in the cementitious material instead of cement.
To this end, according to one aspect of the present invention, a cementitious material includes 70-90wt.% slag, 5-30wt.% cement, and 0-20wt.% gypsum. Preferably, the cement is 5-20wt.%, and the gypsum is 5-20wt.%. Preferably, the mass ratio of cement to gypsum is 1:3.
Wherein the slag is granulated blast furnace slag powder, and the specific surface area of the slag powder is more than or equal to 400m < 2 >/kg. The cement is Portland cement.
According to another aspect of the invention, a hydraulic binding material comprises the following components: 25-40wt.% of a cement as described previously; 0-20wt.% of filler; 50-70wt.% aggregate; and, 0-5wt.% of an additive.
Wherein the slag is 80-85wt.%, the cement is 5-10wt.%, and the gypsum is 10-15wt.%.
Wherein the gypsum is anhydrous gypsum, or the gypsum is a mixture of anhydrous gypsum and semi-hydrated gypsum, or the gypsum is a mixture of anhydrous gypsum and dihydrate gypsum. The mass fraction of the semi-hydrated gypsum or the dihydrate gypsum is not more than 50% of the total mass of gypsum.
Wherein the filler is limestone powder, fly ash or a combination thereof.
Wherein the aggregate is any one or any combination of natural sand, river sand and machine-made sand.
Wherein the additive is one or more of a coagulant, a water retention agent, a rheological agent and a reinforcing agent. Specifically, the additive may be one or more of emulsion, rubber powder, cellulose ether, polymer water reducer, starch ether, clay, sodium silicate, sodium carbonate, sodium chloride, sodium metaaluminate, sodium tripolyphosphate, lithium carbonate, potassium silicate, calcium chloride, potassium chloride, calcium formate, quicklime, slaked lime, sulfoaluminate cement, aluminate cement.
Wherein the additive comprises redispersible latex powder in the range of 0-3wt.%.
Wherein the additive comprises sulphoaluminate cement, and the range of the sulphoaluminate cement is less than or equal to 1%.
According to a further aspect of the invention, a method for preparing the aforementioned hydraulic binding material comprises the following steps: step 1, mixing slag particles, cement and gypsum according to a proportion, and uniformly stirring; and 2, mixing the mixture prepared in the step 1 with the filler, the aggregate and the additive according to a proportion, and uniformly stirring.
According to a further aspect of the invention, a slurry is produced by mixing the aforementioned hydraulic material with water, wherein the water content is 19-26wt.% of the hydraulic material.
According to a further aspect of the invention, a building element is produced from the cementitious material or the hydraulic binding material.
In the technical scheme provided by the invention, the slag powder is used for replacing most of cement to keep the performance equivalent to that of the traditional formula, and the consumption of cement is reduced in a large proportion, so that the energy consumption and carbon emission of product production are obviously reduced, and the pollution to the environment can be reduced by using blast furnace byproducts.
Detailed Description
The technical scheme of the present invention is described in detail below in connection with the specific embodiments.
According to one embodiment of the invention, a cementitious material includes slag, cement, and gypsum.
Wherein the slag mass fraction ranges from 70 to 90wt.% of the total mass of the gel material. The slag is granulated blast furnace slag powder, and the granularity of the slag is the granularity commonly used in the market. The specific surface area of the granulated blast furnace slag powder is more than or equal to 400m 2 Kg (according to Chinese standard GB/T18046-2017). Preferably, the slag is not below the S95 grade specification specified in GB/T18046-2017.
The cement is Portland cement, which is commercially available, typically in powder form. The mass fraction of cement is 5-30wt.%, preferably 5-20wt.% of the total mass of the gel material. In the examples herein, portland cement is used which meets the P.I. 52.5 specification in national standard GB 175-2020. However, those skilled in the art will appreciate that other numbers of portland cement may be used.
The mass fraction of the gypsum is 0-20wt.%, preferably 5-20wt.%, of the total mass of the gel material. Gypsum is commercially available, typically in powder form.
Preferably, the ratio of the mass of cement to the total mass of gypsum is 1:3.
Table 1 shows the components of a number of examples of the above-mentioned cement compositions, and the compressive strength in megapascals (MPa) measured according to the national standard GB/T17671-2021 cement mortar strength test method.
TABLE 1
According to table 1, when the gypsum content is 0, the compressive strength of the cementitious material can be improved by increasing the cement content so as to meet the requirements of national standards and practical applications. At this time, unlike the general knowledge in the art, the slag content is as high as 70% and more. In addition, the use of gypsum and cement can obviously reduce the use amount of cement, and the compressive strength still meets the requirements of national standards and practical applications. Further, in the case of the same slag content, the cement has higher compressive strength when the ratio of the mass of cement to the total mass of gypsum is 1:3.
According to a further embodiment of the invention, the hydraulic binding material comprises the aforementioned gel material, filler, aggregate, additive, wherein each component is a powdery material. After the binding material is added with water and stirred, the binding material can harden and play a binding role. The mass fraction of the gel material is 25-40% of the total mass of the hydraulic binding material.
Wherein the slag is 80-85wt.%, the cement is 5-10wt.%, and the gypsum is 10-15wt.%. Therefore, the slag content can be improved under the condition of meeting the requirements of national standard JC/T547-2017 ceramic tile adhesive, so that the energy consumption and carbon emission of product production can be reduced.
Wherein the gypsum is anhydrous gypsum, or the gypsum is a mixture of anhydrous gypsum and semi-hydrated gypsum, or the gypsum is a mixture of anhydrous gypsum and dihydrate gypsum. The mass fraction of the semi-hydrated gypsum or the dihydrate gypsum is not more than 50% of the total mass of gypsum.
Wherein the mass fraction of the filler is 0-20% of the total mass of the hydraulic binding material. The filler may be limestone powder or fly ash, or a combination of both. Limestone powder or fly ash is commercially available.
Wherein the mass fraction of the aggregate is 50-70% of the total mass of the hydraulic binding material. The filler is any one or any combination of natural sand, river sand and machine-made sand.
Wherein the additive comprises one or more of a set accelerator, a water retention agent, a rheology agent, and a reinforcing agent. The total mass fraction of said additives is 0-5% of the total mass of the hydraulic binding material.
Specifically, the additive may be one or more of emulsion, rubber powder, cellulose ether, polymer water reducer, starch ether, clay, sodium silicate, sodium carbonate, sodium chloride, sodium metaaluminate, sodium tripolyphosphate, lithium carbonate, potassium silicate, calcium chloride, potassium chloride, calcium formate, quicklime, slaked lime, sulfoaluminate cement, aluminate cement. The additives are commercially available. In particular, the additive comprises redispersible emulsion powder, and the mass fraction of the redispersible emulsion powder is 0-3%.
Table 2 gives a number of examples of hydraulic binding materials. The mass of the components contained in the bonding material according to each example is listed in table 2 in grams. The total mass of the bonding material of each example was 1000 grams. Wherein, in examples 1-3, the mass of the cementitious material was divided into 25% of the total mass of the hydraulic binder material. In examples 4-6, the mass of the cementitious material was divided into 30% of the total mass of the hydraulic binder. In examples 7-9, the mass of the cementitious material was divided into 35% of the total mass of the hydraulic binder. In examples 10-12, the mass fraction of cementitious material was 40% of the total mass of hydraulic binder material.
TABLE 2
Test pieces were prepared and tested according to the examples listed in Table 2, following the procedure set forth in the national Standard JC/T547-2017 ceramic tile adhesive. For each example, 220 grams of water was mixed per 1000 grams of bonding material.
Table 3 shows the test results for the samples according to the examples of Table 2, the values in Table 3 being given in megapascals (MPa).
TABLE 3 Table 3
According to Table 3, the properties of examples 1-12 all meet the standard requirements, and the use of slag powder instead of most of the cement still meets the product performance requirements.
In the examples of hydraulic binding materials given below, anhydrite, a combination of anhydrite and hemihydrate, and a combination of anhydrite and dihydrate, respectively, are used. Table 4 shows the mass of each of the components of examples 13-15 in grams and the total mass was 1000 grams.
TABLE 4 Table 4
The mixtures of the above examples were each mixed with 195 g of water, and the materials obtained after mixing were tested according to the test method in the national standard JC/T547-2017 ceramic tile adhesive, and the results are shown in table 5, and are also expressed in megapascals (MPa).
TABLE 5
According to Table 5, the bonding materials according to examples 13-15 all meet the criteria.
Preferred embodiments of the hydraulic binding material of the invention are described below in connection with examples 16-17. Table 6 shows the mass of each component of examples 16-17 in grams and the total mass was 1000 grams. Wherein example 16 does not comprise a sulphoaluminate cement.
TABLE 6
| Example 16 | Example 17 | |
| Slag powder | 255 | 255 |
| Anhydrous gypsum | 30 | 30 |
| Portland cement | 15 | 15 |
| Sulphoaluminate cement | 0 | 6 |
| Sand and sand | 697 | 691 |
| Cellulose ether | 3 | 3 |
Also, the mixtures in the above examples were mixed with 195 g of water, respectively, and the resulting materials after mixing were tested for tensile bond strength for 1 day according to the method in Standard JC/T547-2017 ceramic tile adhesive, and the results are shown in Table 7 in megapascals (MPa).
TABLE 7
According to table 7, the addition of sulfoaluminate cement to the cementitious material can significantly enhance the 1 day bond strength of the material after hydration. Although this example provides only one specific content of sulphoaluminate cement, it is generally less than or equal to 1%.
Preferred embodiments of the hydraulic binding material of the invention are described below in connection with examples 18-21. The mass of each component of examples 18-21 is given in Table 8 in grams and the total mass is 1000 grams.
TABLE 8
| Example 18 | Example 19 | Example 20 | Example 21 | |
| Slag powder | 300 | 300 | 300 | 300 |
| Portland cement | 20 | 20 | 20 | 20 |
| Anhydrous gypsum | 40 | 40 | 40 | 40 |
| Limestone powder | 52 | 62 | 72 | 83 |
| Sand and sand | 550 | 550 | 550 | 550 |
| Redispersible emulsion powder | 30 | 20 | 10 | 0 |
| Calcium formate | 5 | 5 | 5 | 5 |
| Methyl cellulose ether | 3 | 3 | 3 |
Similarly, the mixtures of the above examples were each mixed with 255 g of water, and the resulting materials after mixing were tested for 28-day tensile bond strength according to the method in the national standard JC/T547-2017 ceramic tile adhesive, and the results are shown in table 9 in megapascals (MPa).
TABLE 9
According to Table 9, the addition of redispersible latex powder to the bonding material can significantly enhance the 28 day tensile bond strength of the material after hydration.
According to a further embodiment of the present invention, a method for preparing the hydraulic binding material described above comprises the steps of:
step 1, mixing slag particles, cement and gypsum according to a proportion, and uniformly stirring;
and 2, mixing the mixture prepared in the step 1 with the filler, the aggregate and the additive according to a proportion, and uniformly stirring.
According to a further embodiment of the invention, a slurry is produced by mixing the aforementioned hydraulic binding material with water, wherein the mass fraction of water is 19-26% of the hydraulic binding material.
According to another embodiment of the invention, a building element is produced from the aforementioned cementitious or hydraulic binding material.
In the above description, details of the technical solution of the present invention are set forth, however, it will be understood by those skilled in the art that the present invention is not limited to the specific details set forth in the above embodiments, but may be varied within the scope defined by the claims.
Claims (18)
1. A cementitious material comprising 70-90wt.% slag, 5-30wt.% cement and 0-20wt.% gypsum.
2. The cementitious material of claim 1, wherein the cement is 5-20wt.% and the gypsum is 5-20wt.%.
3. Hydraulic binding material according to claim 1 or 2, wherein the mass ratio of cement to gypsum is 1:3.
4. The cement according to claim 1 or 2, wherein the slag is granulated blast furnace slag powder having a specific surface area of 400m or more 2 /kg。
5. Cement according to claim 1 or 2, wherein the cement is portland cement.
6. A hydraulic binding material comprising the following components: the cement of any one of claims 1-5, 25-40wt.%; 0-20wt.% of filler; 50-70wt.% aggregate; and, 0-5wt.% of an additive.
7. The hydraulic binding material according to claim 6, wherein the slag is 80-85wt.%, the cement is 5-10wt.%, and the gypsum is 10-15wt.%.
8. The hydraulic binding material according to claim 6, wherein the gypsum is anhydrous gypsum, or a mixture of anhydrous gypsum and semi-hydrated gypsum, or a mixture of anhydrous gypsum and dihydrate gypsum.
9. The hydraulic binding material according to claim 8, wherein the mass fraction of the hemihydrate gypsum or the dihydrate gypsum is not more than 50% of the total mass of gypsum.
10. The hydraulic binding material according to claim 6, wherein the filler is limestone powder, fly ash, or a combination thereof.
11. The hydraulic binding material according to claim 6, wherein the aggregate is any one or any combination of natural sand, river sand, machine-made sand.
12. The hydraulic binding material of claim 6, wherein the additives include one or more of a set accelerator, a water retention agent, a water reducing agent, a rheology agent, and a reinforcing agent.
13. The hydraulic binding material of claim 12, wherein the additive is one or more of an emulsion, a gum powder, a cellulose ether, a polymeric water reducing agent, a starch ether, a clay, sodium silicate, sodium carbonate, sodium chloride, sodium metaaluminate, sodium tripolyphosphate, lithium carbonate, potassium silicate, calcium chloride, potassium chloride, calcium formate, quicklime, slaked lime, a sulfoaluminate cement, an aluminate cement.
14. Hydraulic binding material according to claim 6 or 12, wherein the additive comprises redispersible latex powder in the range of 0-3wt.%.
15. Hydraulic binding material according to claim 6 or 12, wherein the additive comprises a sulphoaluminate cement in a range of less than or equal to 1%.
16. A method of preparing the hydraulic binding material of any one of claims 6-15, comprising the steps of:
step 1, mixing slag particles, cement and gypsum according to a proportion, and uniformly stirring;
and 2, mixing the mixture prepared in the step 1 with the filler, the aggregate and the additive according to a proportion, and uniformly stirring.
17. A slurry prepared by mixing the hydraulic binding material according to any one of claims 6 to 15 with water, wherein the water content is 19 to 26wt.% of the hydraulic binding material.
18. Building element made from the cementitious material of any one of claims 1-5 or the hydraulic binding material of any one of claims 6-15.
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| CN103086620A (en) * | 2013-01-30 | 2013-05-08 | 中钢集团马鞍山矿山研究院有限公司 | Gelatinizing agent suitable for unclassified tailing filling |
| US20200079694A1 (en) * | 2017-06-14 | 2020-03-12 | Heidelbergcement Ag | Composite cement and method of manufacturing composite cement |
| CN114180924A (en) * | 2021-12-31 | 2022-03-15 | 徐州中矿大贝克福尔科技股份有限公司 | Cementing material for coal mine paste filling, preparation method thereof and coal mine filling paste |
| CN115368037A (en) * | 2022-08-08 | 2022-11-22 | 嘉华特种水泥股份有限公司 | Heat-resistant concrete cementing material and preparation method and application thereof |
| US20230142698A1 (en) * | 2020-03-13 | 2023-05-11 | Sika Technology Ag | Slag-based hydraulic binder, dry mortar composition comprising same and system for activating a slag-based binder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103086620A (en) * | 2013-01-30 | 2013-05-08 | 中钢集团马鞍山矿山研究院有限公司 | Gelatinizing agent suitable for unclassified tailing filling |
| US20200079694A1 (en) * | 2017-06-14 | 2020-03-12 | Heidelbergcement Ag | Composite cement and method of manufacturing composite cement |
| US20230142698A1 (en) * | 2020-03-13 | 2023-05-11 | Sika Technology Ag | Slag-based hydraulic binder, dry mortar composition comprising same and system for activating a slag-based binder |
| CN114180924A (en) * | 2021-12-31 | 2022-03-15 | 徐州中矿大贝克福尔科技股份有限公司 | Cementing material for coal mine paste filling, preparation method thereof and coal mine filling paste |
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