CN115321851A - Green low-carbon high-performance cementing material and preparation method thereof - Google Patents
Green low-carbon high-performance cementing material and preparation method thereof Download PDFInfo
- Publication number
- CN115321851A CN115321851A CN202211158574.2A CN202211158574A CN115321851A CN 115321851 A CN115321851 A CN 115321851A CN 202211158574 A CN202211158574 A CN 202211158574A CN 115321851 A CN115321851 A CN 115321851A
- Authority
- CN
- China
- Prior art keywords
- slag
- parts
- coal gangue
- cementing material
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 48
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000002893 slag Substances 0.000 claims abstract description 72
- 239000003245 coal Substances 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010440 gypsum Substances 0.000 claims abstract description 20
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000006227 byproduct Substances 0.000 claims abstract description 16
- 238000007670 refining Methods 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 16
- 238000001354 calcination Methods 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims 1
- 239000004568 cement Substances 0.000 abstract description 16
- 239000002910 solid waste Substances 0.000 abstract description 14
- 235000019738 Limestone Nutrition 0.000 abstract description 6
- 239000006028 limestone Substances 0.000 abstract description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 4
- 239000004566 building material Substances 0.000 abstract description 3
- 239000001569 carbon dioxide Substances 0.000 abstract description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 2
- 239000000843 powder Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 7
- 239000000292 calcium oxide Substances 0.000 description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 239000000395 magnesium oxide Substances 0.000 description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/28—Cements from oil shales, residues or waste other than slag from combustion residues, e.g. ashes or slags from waste incineration
-
- 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
- C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
-
- 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
- C04B7/36—Manufacture of hydraulic cements in general
-
- 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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention discloses a green low-carbon high-performance cementing material and a preparation method thereof, and relates to the technical field of resource utilization of low-carbon building materials and industrial solid wastes. The raw materials comprise the following components in parts by weight: 30-50 parts of activated coal gangue, 20-30 parts of furnace slag, 10-20 parts of steel slag, 3-5 parts of refining slag and 8-15 parts of industrial byproduct gypsum. The raw materials of the invention only adopt activated coal gangue, steel slag, refining slag, carbide slag and industrial by-product gypsum, and cement clinker and slag are not required to be added, thus expanding the application range of other solid waste raw materials; and the use of limestone in the conventional cement clinker preparation process is avoided, and the emission of carbon dioxide is reduced. Under the condition that all raw materials are solid wastes, the prepared green low-carbon high-performance cementing material has the compressive strength of 32.4MPa for 3d, 58.1MPa for 28d and good application prospect.
Description
Technical Field
The invention relates to the technical field of resource utilization of low-carbon building materials and industrial solid wastes, in particular to a green low-carbon high-performance cementing material and a preparation method thereof.
Background
Under the background of the current double-carbon era, the cement industry faces huge pressure of energy conservation and emission reduction, and the energy consumption of the cement industry accounts for about 75 percent of the total energy consumption of the building material industry, so the carbon emission reduction of the cement industry is imperative.
The cement is an industry with high energy consumption, high consumption and high pollution emission. For each 1 ton of cement produced, 1.2 tons of natural resources (limestone and clay) and 100kg of standard coal are consumed, and 0.8 ton of CO is discharged 2 And other sulfides, nitrogen oxides, particulates. More than half of this CO 2 The discharge originates from calcium carbonate (CaCO) in limestone 3 ) Of the part of CO 2 Emissions are difficult to avoid by fuel configuration adjustments or energy efficiency improvements. Therefore, the problem of carbon emission of cement is solved fundamentally, limestone is not used as a raw material, and CO generated in the process of decomposing the raw material is reduced 2 And meanwhile, the method does not adopt calcination or needs a small amount of short-time calcination to reduce the use of fuel, which is the key point of carbon reduction.
On the other hand, the stockpiling amount of various industrial solid wastes exceeds 600 hundred million tons, nearly 37 hundred million tons of industrial solid wastes are generated every year, the utilization rate is only about 56 percent, a large amount of land is occupied, the environment is polluted, and potential safety hazards are caused. If the industrial solid waste can be used for preparing the green low-carbon cementing material capable of replacing cement, the method has great significance for solid waste pollution treatment and carbon emission reduction in the cement industry.
Under such a background, the preparation of low-carbon cementing materials by using industrial solid wastes becomes a hot point. Chinese patent CN107572841A discloses a low-carbon cementitious material and a method for preparing concrete, the proportions of the prepared cementitious material are as follows: 20-32% of portland cement clinker, 36-48% of S105 slag powder, 10-20% of fly ash, 8-10% of gypsum, 0-7% of limestone powder, 0-10% of steel slag powder and 4-6% of light-burned magnesium oxide. The cementing material still needs to use cement clinker with higher proportion, and S105 slag powder with larger addition amount and higher price is used.
CN110683774B discloses a gelled material using slag-steel slag-gypsum as raw materials and a preparation method thereof, the materials comprise 10% -70% of slag, 15% -60% of steel slag and 5% -50% of industrial byproduct gypsum; the cementing material is a clinker-free and full-solid waste system, but the early strength of the cementing material is low, and the 3d strength is only 18.7MPa at most under the condition that the water-gel ratio is 0.32.
In addition, the slag used by the existing low-carbon cementing material technology is a blast furnace ironmaking byproduct, is widely applied to the cement and concrete industries, and is converted from solid waste into resources. Therefore, the finding of other solid waste raw materials with wide sources and low utilization rate to replace slag to prepare the clinker-free low-carbon cementing material with excellent performance is an important technical problem to be solved urgently.
Disclosure of Invention
Based on the content, the invention provides the green low-carbon high-performance cementing material and the preparation method, cement clinker and slag (blast furnace ironmaking by-product) are not required to be added, and the cementing material is a low-carbon early-strength cementing material.
In order to achieve the purpose, the invention provides the following scheme:
according to one technical scheme of the invention, the green low-carbon high-performance cementing material comprises the following raw materials in parts by mass: 30-50 parts of activated coal gangue, 20-30 parts of furnace slag, 10-20 parts of steel slag, 3-5 parts of refining slag and 8-15 parts of industrial byproduct gypsum.
Further, the preparation method of the activated coal gangue comprises the following steps:
grinding the coal gangue to the specific surface area of not less than 700m 2 Per kg of coal gangue, obtaining fine coal gangue;
and (2) mixing the ground coal gangue and the carbide slag according to a mass ratio of 78-82: uniformly mixing 8-12, and calcining at 700-850 ℃ for 1.5-2.5h to obtain the activated coal gangue.
The purpose of adding the carbide slag is to produce amorphous SiO after the coal gangue is calcined 2 And Al 2 O 3 And reacts with CaO in the carbide slag to generate hydraulic active calcium silicate and calcium aluminate. Too much carbide slag can form free calcium oxide, further influences the volume stability of the hydrated material, and too little carbide slag can form Ca 2+ The supply is insufficient, the generated active calcium silicate and calcium aluminate are too little, and the strength of the cementing material is influenced, so the invention preferably limits the mass ratio of the ground coal gangue to the carbide slag to 78-82:8-12.
The calcination temperature is too high to cause the amorphous oxide with higher reactivity to be transformed to the crystalline state, the calcination temperature is too low to cause the crystalline minerals in the coal gangue not to be decomposed, the calcination time is too long to improve the material reactivity and increase the energy consumption, and the calcination time is too short to cause the crystalline minerals in the coal gangue to be incompletely activated, so the calcination temperature is preferably limited to 700-850 ℃ and the calcination time is preferably 1.5-2.5h.
According to the second technical scheme, the preparation method of the green low-carbon high-performance cementing material comprises the following steps:
the steel slag and the refining slag are subjected to an iron removal process and then are ground together with slag and industrial by-product gypsum to obtain a ground mixed material;
and uniformly mixing the activated coal gangue and the ground mixed material to obtain the green low-carbon high-performance cementing material.
Further, the specific surface area of the ground mixed material is not less than 650m 2 /kg。
Further, the iron content in the ground mixed material A is less than five per thousand.
The invention discloses the following technical effects:
the raw materials of the invention only adopt activated coal gangue, furnace slag, steel slag, refining slag and industrial by-product gypsum, and cement clinker and blast furnace ironmaking by-product slag are not required to be added, thus expanding the application range of other solid waste raw materials; and the use of limestone in the conventional cement clinker preparation process is avoided, and the emission of carbon dioxide is reduced.
Under the condition that all raw materials are solid wastes, the prepared green low-carbon high-performance cementing material has the compressive strength of 32.4MPa for 3d, 58.1MPa for 28d and good application prospect.
The method is simple, the calcination treatment is only carried out in the preparation process of the activated coal gangue, the calcination temperature is low, the time is short, the fuel consumption is low, and the carbon emission caused by fuel combustion is reduced.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Further, for numerical ranges in this disclosure, it is understood that each intervening value, between the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The specification and examples are exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
The "parts" in the present invention are all parts by mass unless otherwise specified.
In the present invention, "%" is calculated by mass percent unless otherwise specified.
In the embodiment of the invention and the coal gangue used in the proportion, the main component is SiO 2 52～65％，Al 2 O 3 16～36％，Fe 2 O 3 2.28～14.63％，CaO 0.42～2.32％，MgO 0.44～2.41％，TiO 2 0.90～4％，P 2 O 5 0.007～0.24％，K 2 O+Na 2 O 1.45～3.9％，V 2 O 5 0.008 to 0.03 percent; the steel slag mainly comprises 2-8% of Fe, 40-60% of CaO, 3-10% of MgO and MnO 2 1% -8%; the refining slag is CaO-CaF 2 Refining slag is removed; the carbide slag mainly contains Si0 2 5％—10％，Al 2 0 3 20％—25％，Fe 2 O 3 0.2-0.94 percent of Ca, 0.65-71 percent of Ca and 0.22-1.68 percent of MgO; the slag mainly contains SiO 2 44.72-54.99％，Al 2 O 3 26.10-33.80％，Fe 2 O 3 5.5-12.7％，CaO 3.6-5.3％，MgO 0.55-3.28％，SO 3 0.28 to 0.43 percent; the main components of the industrial byproduct gypsum are desulfurized gypsum, phosphogypsum and fluorgypsum; the slag is granular blast furnace slag formed by rapidly cooling slag produced in the metallurgical blast furnace ironmaking process by using water, is also called water slag or water quenching slag, and mainly comprises the following chemical components in percentage by weight: 35 to 42 percent of CaO and SiO 2 26％～34％，Al 2 O 3 6 to 17 percent of MgO, 0.1 to 13 percent of MnO, 0.1 to 2 percent of FeO, 0.07 to 2.5 percent of FeO and 0.2 to 1.5 percent of S. Other indexes meet the requirements of GB/T18046-2008.
Example 1
Step 1, accurately weighing 45 parts of raw material activated coal gangue, 25 parts of furnace slag, 15 parts of steel slag, 4 parts of refining slag and 12 parts of industrial byproduct gypsum.
Step 2, iron-removing the steel slag and the refining slag, and then grinding the steel slag and the industrial byproduct gypsum together according to the mass parts to obtain a ground mixed material,the specific surface area is 650m 2 In terms of/kg. Wherein, the content of iron is controlled to be less than five per thousand after the iron removing process (the iron removing process is a conventional technical means in the field and is not taken as the key point of the protection of the invention, and the details are not repeated here).
And 3, uniformly mixing the activated coal gangue and the ground mixed material to obtain the green low-carbon high-performance cementing material.
The activated coal gangue in the step 1 is prepared by the following steps: grinding the coal gangue to the specific surface area of 700m 2 Per kg, obtaining fine coal gangue; grinding coal gangue and carbide slag (specific surface area 700 m) 2 And/kg) are uniformly mixed according to the mass ratio of 8.
Example 2
The difference from the example 1 is only that in the step 1, the raw materials consist of 50 parts of activated coal gangue, 20 parts of furnace slag, 10 parts of steel slag, 5 parts of refining slag and 15 parts of industrial by-product gypsum.
Example 3
The difference from the example 1 is only that in the step 1, the raw materials consist of 30 parts of activated coal gangue, 30 parts of furnace slag, 20 parts of steel slag, 3 parts of refining slag and 8 parts of industrial by-product gypsum.
Comparative example 1
The only difference from example 1 is that the activated coal gangue in step 1 is prepared by the following steps: grinding the coal gangue to the specific surface area of 700m 2 Per kg, obtaining ground coal gangue; and calcining the ground coal gangue at 750 ℃ for 2h to obtain the activated coal gangue.
Comparative example 2
The difference from the embodiment 1 is only that the specific surface area of the mixed material ground in the step 2 is 350m 2 /kg。
Comparative example 3
Uniformly mixing 72% of raw material slag powder, 18% of steel slag and 10% of desulfurized gypsum according to mass percentage to obtain a cementing material; wherein the specific surface areas of the slag, the steel slag and the desulfurized gypsum are all 650m 2 /kg。
Comparative example 4
According to mass percentUniformly mixing 30% of raw material slag powder, 60% of steel slag powder and 10% of desulfurized gypsum to obtain a cementing material; wherein the specific surface areas of the slag, the steel slag and the desulfurized gypsum are all 650m 2 /kg。
The strength tests were carried out on the cements prepared in examples 1 to 3 and comparative examples 1 to 4: the water-to-glue ratio is 0.32; adding a polycarboxylic acid high-performance water reducing agent into the cementing material to control the fluidity of the mortar to be 160-200 mm; immediately placing the test piece into a standard curing room with the temperature of 20 +/-1 ℃ and the relative humidity of more than 95 percent for curing after removing the mold; the compressive strength of 3 days and 28 days of age is tested, and other methods are executed according to the existing national standard GB/T17671 cement mortar strength test method (ISO method).
The test results are shown in table 1.
TABLE 1
Comparing comparative examples 3 and 4, it can be seen that the strength of the cementitious material is greatly reduced as the amount of slag powder is reduced. In the invention, the embodiment 1-3 obtains the technical effect superior to that of the comparative example 3 (adding a large amount of slag powder) under the condition of omitting the addition of the slag powder.
The above-described embodiments are only intended to illustrate the preferred embodiments of the present invention, and not to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (5)
1. The green low-carbon high-performance cementing material is characterized by comprising the following raw materials in parts by mass: 30-50 parts of activated coal gangue, 20-30 parts of furnace slag, 10-20 parts of steel slag, 3-5 parts of refining slag and 8-15 parts of industrial by-product gypsum.
2. The green low-carbon high-performance cementing material as claimed in claim 1, wherein the preparation method of the activated coal gangue comprises the following steps
Grinding coal gangue to specific surface area not less than 700m 2 Per kg of coal gangue, obtaining fine coal gangue;
and (2) mixing the ground coal gangue and the carbide slag according to the mass ratio of 78-82: uniformly mixing 8-12, and calcining at 750-850 ℃ for 1.5-2.5h to obtain the activated coal gangue.
3. The preparation method of the green low-carbon high-performance cementing material of claim 1 or 2, characterized by comprising the following steps:
the steel slag and the refining slag are subjected to an iron removal process and then are ground together with slag and industrial by-product gypsum to obtain a ground mixed material;
and uniformly mixing the activated coal gangue and the ground mixed material to obtain the green low-carbon high-performance cementing material.
4. The method according to claim 3, wherein the specific surface area of the ground mixture is not less than 650m 2 /kg。
5. The preparation method according to claim 3, wherein the iron content in the ground mixed material A is less than five per thousand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211158574.2A CN115321851A (en) | 2022-09-22 | 2022-09-22 | Green low-carbon high-performance cementing material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211158574.2A CN115321851A (en) | 2022-09-22 | 2022-09-22 | Green low-carbon high-performance cementing material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115321851A true CN115321851A (en) | 2022-11-11 |
Family
ID=83913174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211158574.2A Pending CN115321851A (en) | 2022-09-22 | 2022-09-22 | Green low-carbon high-performance cementing material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115321851A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115745540A (en) * | 2022-11-29 | 2023-03-07 | 北科蕴宏环保科技(北京)有限公司 | Full-solid-waste road base material and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826771A (en) * | 2012-08-10 | 2012-12-19 | 梅州淦源建材科技有限公司 | Coal gangue activator, and novel clinker-free cementing material and preparation method thereof |
| WO2013078839A1 (en) * | 2011-11-28 | 2013-06-06 | 泸州兰良水泥有限公司 | Method for calcining blending material with high activity by feeding outside kiln head and equipment thereof |
| CN103483835A (en) * | 2013-09-09 | 2014-01-01 | 长安大学 | Asphalt modifier and modified asphalt mixture as well as preparation methods thereof |
| CN104876627A (en) * | 2014-09-22 | 2015-09-02 | 河北工程大学 | Method for preparing aerated concrete from gangue and iron tailings |
| CN110304851A (en) * | 2019-07-19 | 2019-10-08 | 迁安威盛固废环保实业有限公司 | A kind of full solid waste cementitious material and preparation method thereof containing refining slag |
| CN113045227A (en) * | 2021-04-15 | 2021-06-29 | 韶关市柏林再生资源开发有限公司 | Activation calcining method for coal gangue |
-
2022
- 2022-09-22 CN CN202211158574.2A patent/CN115321851A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013078839A1 (en) * | 2011-11-28 | 2013-06-06 | 泸州兰良水泥有限公司 | Method for calcining blending material with high activity by feeding outside kiln head and equipment thereof |
| CN102826771A (en) * | 2012-08-10 | 2012-12-19 | 梅州淦源建材科技有限公司 | Coal gangue activator, and novel clinker-free cementing material and preparation method thereof |
| CN103483835A (en) * | 2013-09-09 | 2014-01-01 | 长安大学 | Asphalt modifier and modified asphalt mixture as well as preparation methods thereof |
| CN104876627A (en) * | 2014-09-22 | 2015-09-02 | 河北工程大学 | Method for preparing aerated concrete from gangue and iron tailings |
| CN110304851A (en) * | 2019-07-19 | 2019-10-08 | 迁安威盛固废环保实业有限公司 | A kind of full solid waste cementitious material and preparation method thereof containing refining slag |
| CN113045227A (en) * | 2021-04-15 | 2021-06-29 | 韶关市柏林再生资源开发有限公司 | Activation calcining method for coal gangue |
Non-Patent Citations (2)
| Title |
|---|
| 《胶凝材料学》编写组: "《混凝土学 第2版》", 哈尔滨：哈尔滨工业大学出版社 * |
| 王斌云等: "利用电石渣活化煤矸石的试验研究" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115745540A (en) * | 2022-11-29 | 2023-03-07 | 北科蕴宏环保科技(北京)有限公司 | Full-solid-waste road base material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2020101143A4 (en) | A Method For Preparing The Fast-Hardening Early-Strength High-Performance All-Solid Waste Concrete | |
| AU2020101223A4 (en) | A Method for Preparing Cementitious material with all solid wasteContaining Refining Slag | |
| CN111393047B (en) | High-iron belite cement and preparation method thereof | |
| CN101525217B (en) | Environmental-friendly clinker-free cement and preparation method thereof | |
| CN102491717B (en) | Gypsum-base concrete with performances of sugaring resistance and carbonization resistance, and preparation method thereof | |
| CN115321898B (en) | High-performance composite mineral admixture and preparation method thereof | |
| KR20080102114A (en) | Composition of blended cement using high-volume industrial by-products and method of thereof | |
| CN115321848A (en) | Full-solid waste-based low-carbon green ecological cementing material and manufacturing method thereof | |
| JP4781285B2 (en) | Blast furnace slag cement | |
| CN114394772A (en) | Ecological cementing material and preparation method thereof | |
| CN110627386A (en) | Titanium slag cement and preparation method and application thereof | |
| KR101468899B1 (en) | Cement and concrete composition | |
| CN104817286B (en) | Preparation method of full-tailing consolidation discharge cementing agent | |
| KR20180099598A (en) | Binder for secondary concrete product and manufacturing method of secondary concrete product | |
| CN112723779A (en) | Concrete admixture containing high-silicon iron tailings and preparation method thereof | |
| CN112125542A (en) | Composite portland cement and preparation method thereof | |
| CN108585560A (en) | A kind of no first-hand datum high-performance cement prepared by metallurgical slag | |
| CN111302677A (en) | Super-sulfate cement and preparation method thereof | |
| CN115321851A (en) | Green low-carbon high-performance cementing material and preparation method thereof | |
| CN114956642B (en) | Composite expanding agent based on regenerated micro powder and preparation method thereof | |
| CN108264249B (en) | Ferronickel slag-slag low-hydration-heat cementing material and preparation method thereof | |
| CN115028395B (en) | Solid waste building material product and preparation method thereof | |
| CN110615655A (en) | Special curing agent for low-strength cured soil and preparation method thereof | |
| CN110818300A (en) | Manganese slag super-sulfate cement and preparation method thereof | |
| CN114230219B (en) | Preparation method and application of steel slag composite excitant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221111 |