CN113387672A - Cementing material and preparation method thereof - Google Patents
Cementing material and preparation method thereof Download PDFInfo
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- CN113387672A CN113387672A CN202110739524.2A CN202110739524A CN113387672A CN 113387672 A CN113387672 A CN 113387672A CN 202110739524 A CN202110739524 A CN 202110739524A CN 113387672 A CN113387672 A CN 113387672A
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- slag
- cement
- metakaolin
- lime
- slag powder
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- 239000000463 material Substances 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 136
- 239000002893 slag Substances 0.000 claims abstract description 116
- 239000011499 joint compound Substances 0.000 claims abstract description 81
- 239000004568 cement Substances 0.000 claims abstract description 63
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 63
- 239000010440 gypsum Substances 0.000 claims abstract description 63
- 229910052500 inorganic mineral Inorganic materials 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
- 239000011707 mineral Substances 0.000 claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 47
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 47
- 239000004571 lime Substances 0.000 claims abstract description 47
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 27
- 238000002156 mixing Methods 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 22
- 239000012190 activator Substances 0.000 claims description 10
- -1 alkali metal alkyl sulfonate Chemical class 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 229910052783 alkali metal Inorganic materials 0.000 claims description 6
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 229920001732 Lignosulfonate Polymers 0.000 claims description 2
- 229910000288 alkali metal carbonate Inorganic materials 0.000 claims description 2
- 150000008041 alkali metal carbonates Chemical class 0.000 claims description 2
- 229910052910 alkali metal silicate Inorganic materials 0.000 claims description 2
- 229910052936 alkali metal sulfate Inorganic materials 0.000 claims description 2
- 239000008030 superplasticizer Substances 0.000 claims 3
- 229940077388 benzenesulfonate Drugs 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 17
- 239000010791 domestic waste Substances 0.000 abstract description 12
- 238000004056 waste incineration Methods 0.000 abstract description 12
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 3
- 230000009977 dual effect Effects 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 239000002440 industrial waste Substances 0.000 abstract description 2
- 239000002910 solid waste Substances 0.000 abstract description 2
- 235000010755 mineral Nutrition 0.000 description 46
- 238000003756 stirring Methods 0.000 description 21
- 239000010813 municipal solid waste Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 10
- 239000002245 particle Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 7
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 7
- 239000003513 alkali Substances 0.000 description 7
- 238000007885 magnetic separation Methods 0.000 description 7
- 238000012216 screening Methods 0.000 description 7
- 229910052938 sodium sulfate Inorganic materials 0.000 description 7
- 235000011152 sodium sulphate Nutrition 0.000 description 7
- 238000005406 washing Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 6
- 239000004567 concrete Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- 235000012255 calcium oxide Nutrition 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 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 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000004566 building material Substances 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
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical group [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- RUYJNKYXOHIGPH-UHFFFAOYSA-N dialuminum;trioxido(trioxidosilyloxy)silane Chemical compound [Al+3].[Al+3].[O-][Si]([O-])([O-])O[Si]([O-])([O-])[O-] RUYJNKYXOHIGPH-UHFFFAOYSA-N 0.000 description 1
- VCSZKSHWUBFOOE-UHFFFAOYSA-N dioxidanium;sulfate Chemical compound O.O.OS(O)(=O)=O VCSZKSHWUBFOOE-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- 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
Abstract
The invention discloses a cementing material and a preparation method thereof, wherein the cementing material comprises the following components: slag powder mud, cement, mineral powder, metakaolin, gypsum, lime, an excitant, a water reducing agent and water. The invention uses the slag powder mud produced by the domestic waste incineration power plant as the main raw material, so that the domestic waste incineration slag powder mud is changed into valuable, the problem of secondary utilization of industrial waste slag and the domestic waste incineration slag powder mud is solved, the cost of the raw materials of the building cementing material is reduced, and the dual purposes of solid waste recycling and energy conservation and environmental protection are realized.
Description
Technical Field
The invention belongs to the field of buildings, and particularly relates to a cementing material and a preparation method thereof.
Background
In recent years, with the increase of urbanization level, effective and reasonable disposal of municipal domestic waste is particularly important, and waste incineration has become an important way for solving the problem of domestic waste in many developed countries. Therefore, the construction of household garbage incineration power plants is accelerated, the yield of household garbage incineration slag is increased day by day, the regeneration treatment of the household garbage incineration slag becomes a problem which needs to be solved, along with the continuous popularization of the concept of environmental protection, the change of the household garbage into valuable is a trend, and in order to reduce the treatment cost, the treatment can be realized in a slag recycling mode.
The household garbage incineration slag is a byproduct of household garbage incineration power generation, comprises residual incineration residues on a fire grate and particles falling from the fire grate, is black brown, accounts for about 20-30% of the mass of the garbage, and accounts for about 0.5% of fly ash. The domestic garbage incinerator slag mainly comprises ceramics, glass, metal, incompletely combusted organic matters and non-combustible inorganic matters. The slag is pretreated, the pretreatment process comprises magnetic separation, crushing and screening, washing and natural airing, about 3% of waste metals such as Fe, Al and the like are recovered, about 30% of slag with 3-6mm coarse particle size in the residual slag can be used as coarse aggregate, about 50% of slag with 2-3mm fine particle size can be used as fine aggregate, at present, 80% of coarse and fine slag is generally used as roadbed backfill or for manufacturing regeneration products such as baking-free bricks, and the slag with particle size below 2mm is ultrafine particle size slag powder mud.
Disclosure of Invention
In order to solve the problem that the ultrafine-grain-size slag powder mud cannot be effectively utilized in the prior art, the invention aims to provide a cementing material, which is widely applied to preparing building materials by using the waste incineration slag powder mud, so that waste is turned into wealth, and the environmental burden is reduced.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a cementitious material comprising the following components: slag powder mud, cement, mineral powder, metakaolin, gypsum, lime, an excitant, a water reducing agent and water.
Preferably, the cementing material comprises the following components in percentage by mass: 30-70% of slag powder mud, 5-20% of cement, 20-50% of mineral powder, 2-5% of metakaolin, 5-10% of gypsum and 2-5% of lime; the sum of the mass percentages of the slag powder mud, the cement, the mineral powder, the metakaolin, the gypsum and the lime is 100 percent.
Preferably, the slag powder mud is the slag powder mud after the refuse incineration; preferably, the slag powder mud is pretreated slag powder mud, and the pretreatment comprises the steps of magnetic separation, crushing and screening, washing, natural airing and the like; still further preferably, the grain size of the slag powder mud is less than 2 mm; since the slag having a particle size of 2mm or less mainly contains Ca, Si and Al elements and contains a large amount of Si elements, slag having a particle size of 2mm or less is tried to be activated by alkali and used as a binder instead of a part of cement.
Preferably, the slag powder mud comprises the following components in percentage by mass: 10-35% SiO2、20-50％CaO、2-10％Al2O3、1-5％Fe2O3、1-5％MgO、1-5％SO3。
Preferably, the cement is one of portland cement or ordinary portland cement; meets the requirements of GB175-2007 general Portland cement.
Preferably, the mineral powder is blast furnace slag discharged from a blast furnace during pig iron smelting; under the excitation of lime/gypsum, the compressive strength of the cementing material can be effectively improved; after being quenched by a large amount of water, the blast furnace slag can be made into fine grain water slag mainly containing glass bodies, has potential hydraulic gelation performance, shows the hydraulic gelation performance under the action of excitants such as cement clinker, lime, gypsum and the like, and is a high-quality cement raw material.
Metakaolin is a high-activity pozzolanic material, has a similar action mechanism in concrete as silica fume and the like, and is called as super pozzolan due to the extremely high pozzolanic activity; metakaolin is kaolin (Al)2O3·2SiO2·2H2O) is taken as raw material, dehydrated at a proper temperature (600-900 ℃) to form anhydrous aluminum silicate (Al)2O3·2SiO2) (ii) a Preferably, the metakaolin is kaolin (Al)2O3·2SiO2·2H2O) is taken as a raw material, and is prepared by dehydration and impurity removal at the temperature of 600-; metakaolin can regulate the Al content in the cementing material, and the metakaolin reacts with cement and other materials to generate hydration products with certain structural strength.
Preferably, the gypsum is desulfurized gypsum; the desulfurized gypsum, also known as flue gas desulfurized gypsum, sulfur gypsum or FGD (flue gas desulfurization) gypsum, has the same main components as natural gypsum and contains sulfuric acid dihydrate as the main componentCalcium CaSO4·2H2The content of O is more than or equal to 93 percent, and compared with other gypsum powder, the desulfurized gypsum powder has the characteristics of reproducibility, small granularity, stable components, low content of harmful impurities, high purity and the like; the desulfurized gypsum is a byproduct in the FGD process, the FGD process is a technology for recovering sulfur dioxide in flue gas of fire coal or oil by using lime-limestone, and the use of the desulfurized gypsum greatly reduces the mining amount of the mineral gypsum and saves resources.
Lime is also called burnt lime, the main component is calcium oxide CaO, calcium hydroxide Ca (OH) is generated by hydration2The mineral admixture can be excited to react with the mineral admixture to generate calcium silicate hydrate C-S-H, so that the slag powder mud is fully excited.
Preferably, the activator is at least one of alkali metal silicate, alkali metal sulfate, alkali metal carbonate, alkali metal alkylsulfonate, alkali metal alkylbenzene sulfonate and alkali metal alkylsulfate; more preferably, the activator is sodium silicate, sodium sulfate, sodium carbonate, sodium alkylsulfonate, sodium alkylbenzenesulfonate, sodium alkylsulfate; still more preferably, the activator is sodium sulfate; by adding the exciting agent, the strength of the cementing material prepared by utilizing the slag powder mud is effectively improved, so that the use proportion of the slag powder mud is greatly increased.
Preferably, the addition amount of the exciting agent is 0.5-10% of the total mass of the slag powder mud, the cement, the mineral powder, the metakaolin, the gypsum and the lime; more preferably, the addition amount of the exciting agent is 1-8% of the total mass of the slag powder mud, the cement, the mineral powder, the metakaolin, the gypsum and the lime; still further preferably, the addition amount of the exciting agent is 3-6% of the total mass of the slag powder mud, the cement, the mineral powder, the metakaolin, the gypsum and the lime.
Preferably, the water reducing agent is at least one of a naphthalene-based high-efficiency water reducing agent, a lignosulfonate water reducing agent and a polycarboxylic acid high-performance water reducing agent; further preferably, the water reducing agent is a polycarboxylic acid high-performance water reducing agent; the polycarboxylic acid high-performance water reducing agent is prepared by graft copolymerization of various macromolecular organic compounds taking polycarboxylate as a main body, has extremely strong water reducing performance, good compatibility with various cements, good slump retention performance of concrete, low mixing amount, high water reducing rate and small shrinkage, can greatly improve the early and later strength of the concrete, has low chloride ion content and alkali content, and is beneficial to the durability of the concrete.
Preferably, the addition amount of the water reducing agent is 0.05-0.15% of the total mass of the slag powder mud, the cement, the mineral powder, the metakaolin, the gypsum and the lime; further preferably, the addition amount of the water reducing agent is 0.08-0.12% of the total mass of the slag powder mud, the cement, the mineral powder, the metakaolin, the gypsum and the lime; still further preferably, the addition amount of the water reducing agent is 0.1% of the total mass of the slag powder mud, the cement, the mineral powder, the metakaolin, the gypsum and the lime.
Preferably, the water is common concrete mixing water.
Preferably, the addition amount of the water is 30-70% of the total mass of the slag powder mud, the cement, the mineral powder, the metakaolin, the gypsum and the lime; more preferably, the addition amount of the water is 40-60% of the total mass of the slag powder mud, the cement, the mineral powder, the metakaolin, the gypsum and the lime.
Another object of the present invention is to provide a method for preparing the above-mentioned cement.
A preparation method of the cementing material comprises the following steps:
1) mixing cement, mineral powder, metakaolin, gypsum, lime, slag powder mud and an exciting agent to obtain a mixture;
2) mixing the mixture obtained in the step 1) with water, adding a water reducing agent, and mixing to obtain the cementing material.
Preferably, in the preparation method of the cementing material, the mixing mode in the step 1) is stirring.
Preferably, in the preparation method of the cementing material, the mixing mode in the step 2) is stirring; further preferably, the stirring is carried out in a stirred tank.
Preferably, the step 2) of the preparation method of the cementing material also comprises the curing of the cementing material; further preferably, the curing is performed at normal temperature and pressure.
The invention has the beneficial effects that:
according to the invention, the slag powder and mud produced by the household garbage incineration power plant are used as the main raw material to prepare the cementing material, so that the slag powder and mud produced by the household garbage incineration power plant are changed into valuable, and the production cost is reduced; the addition of the excitant can excite the activity of the domestic waste incineration slag powder mud, and effectively improve the strength of the cementing material prepared by utilizing the slag powder mud, so that the use proportion of the slag powder mud is greatly increased, the use amount of common Portland cement is reduced, resources are saved, the problem of secondary utilization of industrial waste slag and the domestic waste incineration slag powder mud is solved, and the cost of raw materials of the building cementing material is reduced; the preparation method of the cementing material is simple, has higher popularization value, and realizes the dual purposes of solid waste recycling, energy conservation and environmental protection.
Detailed Description
The present invention will be described in further detail with reference to specific examples. The starting materials, reagents or apparatus used in the examples and comparative examples were obtained from conventional commercial sources or can be obtained by a method of the prior art, unless otherwise specified. Unless otherwise indicated, the testing or testing methods are conventional in the art.
Example 1
The cementing material comprises the following components in percentage by mass: 40% of slag powder mud, 15% of cement, 30% of mineral powder, 3% of metakaolin, 9% of desulfurized gypsum and 3% of lime, wherein the sum of the mass percentages of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime is 100%; the excitant is doped externally and accounts for 6 percent of the total mass system of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime; the water reducing agent accounts for 0.1 percent of the total mass system of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime; the water accounts for 40 percent of the total mass system of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime.
The domestic waste incineration slag pretreatment process comprises magnetic separation, crushing and screening, washing and natural airing, and the residual slag powder mud with the particle size smaller than 2mm after the garbage slag is pretreated is selected as the raw material of the cementing material in the embodiment.
Weighing cement, mineral powder, metakaolin, desulfurized gypsum and lime according to the mass percentage for later use, mixing the weighed slag powder mud into the raw material, and adding an alkali activator to obtain a mixture; adding the mixture and water into a stirring tank at room temperature, adding a water reducing agent, starting a stirrer, and stirring to mix into a cementing material; and (3) injecting the mixture into a 40mm by 160mm mould, shaping, demoulding and maintaining to finally obtain the finished gelled material prepared from the slag powder mud.
The excitant is sodium sulfate; the mixing mode is stirring; the curing conditions are as follows: curing is carried out at normal temperature (about 20 ℃) and normal pressure.
Example 2
The cementing material comprises the following components in percentage by mass: 40% of slag powder mud, 15% of cement, 30% of mineral powder, 3% of metakaolin, 9% of desulfurized gypsum and 3% of lime, wherein the sum of the mass percentages of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime is 100%; the excitant is doped externally and accounts for 3 percent of the total mass system of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime; the water reducing agent accounts for 0.1 percent of the total mass system of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime; the water accounts for 40 percent of the total mass system of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime.
The domestic waste incineration slag pretreatment process comprises magnetic separation, crushing and screening, washing and natural airing, and the residual slag powder mud with the particle size smaller than 2mm after the garbage slag is pretreated is selected as the raw material of the cementing material in the embodiment.
Weighing cement, mineral powder, metakaolin, desulfurized gypsum and lime according to the mass percentage for later use, mixing the weighed slag powder mud into the raw material, and adding an alkali activator to obtain a mixture; adding the mixture and water into a stirring tank at room temperature, adding a water reducing agent, starting a stirrer, and stirring to mix into a cementing material; and (3) injecting the mixture into a 40mm by 160mm mould, shaping, demoulding and maintaining to finally obtain the finished gelled material prepared from the slag powder mud.
The excitant is sodium sulfate; the mixing mode is stirring; the curing conditions are as follows: curing is carried out at normal temperature (about 20 ℃) and normal pressure.
Example 3
The cementing material comprises the following components in percentage by mass: 40% of slag powder mud, 15% of cement, 30% of mineral powder, 3% of metakaolin, 9% of desulfurized gypsum and 3% of lime, wherein the sum of the mass percentages of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime is 100%; the excitant is doped externally and accounts for 6 percent of the total mass system of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime; the water reducing agent accounts for 0.1 percent of the total mass system of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime; the water accounts for 50 percent of the total mass system of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime.
The domestic waste incineration slag pretreatment process comprises magnetic separation, crushing and screening, washing and natural airing, and the residual slag powder mud with the particle size smaller than 2mm after the garbage slag is pretreated is selected as the raw material of the cementing material in the embodiment.
Weighing cement, mineral powder, metakaolin, desulfurized gypsum and lime according to the mass percentage for later use, mixing the weighed slag powder mud into the raw material, and adding an alkali activator to obtain a mixture; adding the mixture and water into a stirring tank at room temperature, adding a water reducing agent, starting a stirrer, and stirring to mix into a cementing material; and (3) injecting the mixture into a 40mm by 160mm mould, shaping, demoulding and maintaining to finally obtain the finished gelled material prepared from the slag powder mud.
The excitant is sodium sulfate; the mixing mode is stirring; the curing conditions are as follows: curing is carried out at normal temperature (about 20 ℃) and normal pressure.
Example 4
The cementing material comprises the following components in percentage by mass: 50% of slag powder mud, 10% of cement, 25% of mineral powder, 3% of metakaolin, 9% of desulfurized gypsum and 3% of lime, wherein the sum of the mass percentages of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime is 100%; the excitant is doped externally and accounts for 6 percent of the total mass system of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime; the water reducing agent accounts for 0.1 percent of the total mass system of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime; the water accounts for 40 percent of the total mass system of the slag powder mud, the cement, the mineral powder, the metakaolin, the desulfurized gypsum and the lime.
The domestic waste incineration slag pretreatment process comprises magnetic separation, crushing and screening, washing and natural airing, and the residual slag powder mud with the particle size smaller than 2mm after the garbage slag is pretreated is selected as the raw material of the cementing material in the embodiment.
Weighing cement, mineral powder, metakaolin, desulfurized gypsum and lime according to the mass percentage for later use, mixing the weighed slag powder mud into the raw material, and adding an alkali activator to obtain a mixture; adding the mixture and water into a stirring tank at room temperature, adding a water reducing agent, starting a stirrer, and stirring to mix into a cementing material; and (3) injecting the mixture into a 40mm by 160mm mould, shaping, demoulding and maintaining to finally obtain the finished gelled material prepared from the slag powder mud.
The excitant is sodium sulfate; the mixing mode is stirring; the curing conditions are as follows: curing is carried out at normal temperature (about 20 ℃) and normal pressure.
Comparative example 1
The cementing material comprises the following components in percentage by mass: 100% of cement and 40% of water in the mass of the cement.
Adding cement and water into a stirring tank at room temperature, starting a stirrer, and stirring and mixing to obtain a cementing material; and (3) injecting the mixture into a 40 mm-160 mm mould, shaping, demoulding and maintaining to obtain a finished product of the cementing material.
The mixing mode is stirring; the curing conditions are as follows: curing is carried out at normal temperature (about 20 ℃) and normal pressure.
Comparative example 2
The cementing material comprises the following components in percentage by mass: 50% of slag powder mud, 10% of cement, 31% of mineral powder and 9% of desulfurized gypsum, wherein the sum of the mass percentages of the slag powder mud, the cement, the mineral powder and the desulfurized gypsum is 100%; the excitant is doped externally and accounts for 6 percent of the total mass system of the slag powder mud, the cement, the mineral powder and the desulfurized gypsum; the water reducing agent accounts for 0.1 percent of the total mass system of the slag powder mud, the cement, the mineral powder, the metakaolin and the desulfurized gypsum; the water accounts for 40 percent of the total mass system of the slag powder mud, the cement, the mineral powder, the metakaolin and the desulfurized gypsum.
The domestic waste incineration slag pretreatment process comprises magnetic separation, crushing and screening, washing and natural airing, and the residual slag powder mud with the particle size smaller than 2mm after the garbage slag is pretreated is selected as the raw material of the cementing material in the embodiment.
Weighing cement, mineral powder, metakaolin and desulfurized gypsum according to the mass percentage for later use, mixing the weighed slag powder mud into the mixture as a raw material, and adding an alkali activator into the mixture to obtain a mixture; adding the mixture and water into a stirring tank at room temperature, adding a water reducing agent, starting a stirrer, and stirring to mix into a cementing material; and (3) injecting the mixture into a 40mm by 160mm mould, shaping, demoulding and maintaining to finally obtain the finished gelled material prepared from the slag powder mud.
The excitant is sodium sulfate; the mixing mode is stirring; the curing conditions are as follows: curing is carried out at normal temperature (about 20 ℃) and normal pressure.
The gelled materials obtained in examples 1 to 4 and comparative examples 1 to 2 were subjected to the performance test, and the test results are shown in Table 1 below.
TABLE 1 cementitious Material Performance test results
From the examples 1 and 2, it is known that when the addition amount of the exciting agent is increased from 3% to 6%, the 28d flexural strength and 28d compressive strength of the cementing material can be effectively improved; from example 4 and comparative example 2, it can be seen that when the cement material does not contain mountain high soil and lime, slag silt can not be sufficiently excited, the strength of the cement material is reduced, and the 28d flexural strength and 28d compressive strength of the cement material are reduced; as can be seen from examples 1 to 4 and comparative example 1, the 28d compressive strength of the gelled product obtained from the slag powder mud can reach about 50% of that of a pure cement product, and other applications of the slag powder mud in construction can be discussed on the basis of the 28d compressive strength. The invention can consume the unused slag powder mud, has the characteristics of environmental protection, low price, simple preparation method and the like, and has higher popularization value.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A cementitious material, comprising the following components: slag powder mud, cement, mineral powder, metakaolin, gypsum, lime, an excitant, a water reducing agent and water.
2. The cementing material of claim 1, which comprises the following components in percentage by mass: 30-70% of slag powder mud, 5-20% of cement, 20-50% of mineral powder, 2-5% of metakaolin, 5-10% of gypsum and 2-5% of lime.
3. The cementitious material of claim 1, wherein the slag sludges are refuse-incinerated slag sludges; the grain size of the slag powder mud is less than 2 mm.
4. The cementitious material of claim 3, wherein the slag sludges comprise the following components in mass percent: 10-35% SiO2、20-50％CaO、2-10％Al2O3、1-5％Fe2O3、1-5％MgO、1-5％SO3。
5. The cementitious material of claim 1, wherein the activator is at least one of an alkali metal silicate, an alkali metal sulfate, an alkali metal carbonate, an alkali metal alkyl sulfonate, an alkali metal alkyl benzene sulfonate, and an alkali metal alkyl sulfate.
6. The cementitious material of claim 1, wherein the activator is added in an amount of 0.5-10% by weight of the total amount of slag powder, cement, mineral powder, metakaolin, gypsum and lime.
7. The cementitious material of claim 1, wherein the water reducer is at least one of a naphthalene based superplasticizer, a lignosulfonate based superplasticizer, and a polycarboxylic acid high performance superplasticizer.
8. The cementitious material of claim 1, wherein the water reducing agent is added in an amount of 0.05-0.15% of the total mass of the slag powder, cement, mineral powder, metakaolin, gypsum and lime.
9. The cementitious material of claim 1, wherein the water is added in an amount of 30-70% by weight of the total amount of slag powder, cement, mineral powder, metakaolin, gypsum and lime.
10. The preparation method of the cementing material is characterized by adopting the components in the claim 1 and comprising the following steps:
1) mixing cement, mineral powder, metakaolin, gypsum, lime, slag powder mud and an exciting agent to obtain a mixture;
2) mixing the mixture obtained in the step 1) with water, adding a water reducing agent, and mixing to obtain the cementing material.
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