CN113563005A - Special exciting agent for composite cement with few silicate clinker components and preparation method thereof - Google Patents
Special exciting agent for composite cement with few silicate clinker components and preparation method thereof Download PDFInfo
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- CN113563005A CN113563005A CN202110799630.XA CN202110799630A CN113563005A CN 113563005 A CN113563005 A CN 113563005A CN 202110799630 A CN202110799630 A CN 202110799630A CN 113563005 A CN113563005 A CN 113563005A
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- 239000004568 cement Substances 0.000 title claims abstract description 114
- 239000002131 composite material Substances 0.000 title claims abstract description 57
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000004094 surface-active agent Substances 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 16
- 239000003607 modifier Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 8
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 33
- 238000002156 mixing Methods 0.000 claims description 20
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 18
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 17
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 17
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 17
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical compound [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 claims description 15
- 229920001732 Lignosulfonate Polymers 0.000 claims description 15
- 229940044172 calcium formate Drugs 0.000 claims description 15
- 239000004281 calcium formate Substances 0.000 claims description 15
- 235000019255 calcium formate Nutrition 0.000 claims description 15
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 claims description 14
- 239000004115 Sodium Silicate Substances 0.000 claims description 14
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 14
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical group [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 14
- 239000001632 sodium acetate Substances 0.000 claims description 14
- 235000017281 sodium acetate Nutrition 0.000 claims description 14
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 14
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 14
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 14
- 235000011152 sodium sulphate Nutrition 0.000 claims description 14
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 14
- 229910052925 anhydrite Inorganic materials 0.000 claims description 13
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 10
- -1 alkali metal salt Chemical class 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 229910052783 alkali metal Inorganic materials 0.000 claims description 4
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims 1
- 235000019738 Limestone Nutrition 0.000 abstract description 12
- 239000006028 limestone Substances 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 9
- 239000000654 additive Substances 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 239000003469 silicate cement Substances 0.000 abstract description 6
- 239000002910 solid waste Substances 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 239000004567 concrete Substances 0.000 description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 229910052799 carbon Inorganic materials 0.000 description 10
- 239000002893 slag Substances 0.000 description 8
- 239000011398 Portland cement Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000003153 chemical reaction reagent Substances 0.000 description 6
- 239000010881 fly ash Substances 0.000 description 6
- 230000036571 hydration Effects 0.000 description 6
- 238000006703 hydration reaction Methods 0.000 description 6
- 239000011404 masonry cement Substances 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229940040526 anhydrous sodium acetate Drugs 0.000 description 4
- 229920005551 calcium lignosulfonate Polymers 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 4
- 239000010440 gypsum Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 235000019794 sodium silicate Nutrition 0.000 description 3
- 239000012190 activator Substances 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 231100000481 chemical toxicant Toxicity 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 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
- 239000000243 solution Substances 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 229910001579 aluminosilicate mineral Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical group [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001514 detection method Methods 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
- 239000003623 enhancer Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 238000006467 substitution reaction 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of cementing materials and process additives, and discloses a special exciting agent for composite cement with few silicate clinker components and a preparation method thereof, wherein the special exciting agent comprises the following preparation raw materials: reinforcing excitant, modifier, surfactant and dispersing carrier. The special excitant can be applied to the production of the composite cement with less silicate clinker components, solves the defects of the prior ordinary silicate cement product and the preparation method, has less silicate cement clinker consumption in the obtained composite cement with less silicate clinker components, can save energy and limestone resources, and reduces CO2The discharge greatly consumes industrial solid wastes, and reduces the cement production cost; the preparation method is simple, easy to operate and implement and convenient for realizing industrial application.
Description
Technical Field
The invention relates to the technical field of cementing materials and process additives, in particular to a special excitant for composite cement with few silicate clinker components and a preparation method thereof.
Background
Less clinker, low cost, low carbon, green and environmental protection are one of the development directions and trends of the general portland cement. The composite cement with few silicate clinker components (hereinafter referred to as the low clinker cement) is a low-carbon environment-friendly green product with few clinker components, which is developed and developed by adopting alkali-activated cementing materials and a geochemical mineral polymer technology according to the physicochemical theories of hydration, condensation, hardening and the like of the cement, can improve the early and later strength of the cement in a balanced manner, reduce the water demand of the cement, improve the workability of the cement, improve the compactness of the cement concrete, save energy and limestone resources, reduce the energy consumption and reduce the emission of carbon dioxide. Particularly has obvious advantages in greatly reducing the component content of cement clinker and the production cost of cement and realizing low carbon, green and environmental protection.
At present, the common portland cement which is largely applied to constructional engineering has high content of portland cement clinker components, which is approximately more than 50 percent, high-grade cement with clinker components of more than 80 percent, solid wastes such as slag, fly ash and pozzolana, and mixed material components such as limestone, which are less than 45 percent, and belongs to portland mineral-based cement. The production of ordinary Portland cement consumes a large amount of energy and limestone resources, and discharges a large amount of CO2And SOx、NOxAnd the like, causing environmental pollution. The cement of the common silicate cement has high hydration heat, cement concrete can generate large shrinkage and is easy to crack, the elastic modulus is low, the fireproof performance and the heat resistance are poor, and the corrosion resistance is poor. If the workability, cohesiveness, water retention property and other workability of the ordinary portland cement can meet the requirements of concrete construction performance, the workability can be realized only by adding corresponding chemical additives for adjustment.
Therefore, technical workers in the field are dedicated to developing the special excitant for the composite cement with less silicate clinker components, and the excitant can be effectively applied to producing the composite cement with less silicate clinker components and reducing the consumption of silicate cement clinker. The energy and limestone resources can be saved, and CO can be reduced2The product and the preparation technology belong to low-carbon environment-friendly green products and preparation technologies, and meet the aim of 'carbon peak reaching and carbon neutralization' incorporation into the overall layout of ecological civilization construction.
Disclosure of Invention
In view of the problems in the prior art, the invention aims to provideThe special excitant for the composite cement with less silicate clinker components and the preparation method thereof can be applied to the production of the composite cement with less silicate clinker components, solves the defects of the prior common silicate cement product and the preparation method, has less silicate cement clinker consumption in the obtained composite cement with less silicate clinker components, can save energy and limestone resources, reduces CO2The discharge greatly consumes industrial solid wastes, and reduces the cement production cost; the preparation method is simple, easy to operate and implement and convenient for realizing industrial application.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme.
The special exciting agent for the composite cement with few silicate clinker components comprises the following preparation raw materials: reinforcing excitant, modifier, surfactant and dispersing carrier.
Preferably, the booster activator comprises an alkali metal salt or/and an alkaline earth metal salt.
Further preferably, the alkali metal salt comprises one or more of sodium sulfate and sodium acetate.
Further preferably, the alkaline earth metal salt comprises one or more of sodium silicate and calcium formate.
Further preferably, the sodium sulfate is in industrial grade, the content is more than or equal to 99 percent, and the content of water-insoluble substances is less than or equal to 0.03 percent.
Further preferably, the sodium acetate is industrial anhydrous sodium acetate, and the content is more than or equal to 98%.
Further preferably, the sodium silicate is industrial grade, the modulus is 1-2.85, the granularity is 200 meshes, and the content is more than or equal to 98%.
Further preferably, the calcium formate is industrial grade, light brown crystalline powder, and the content of the calcium formate is more than or equal to 99%.
Preferably, the modifier comprises one or more of lignosulfonate, sodium hexametaphosphate and sodium tripolyphosphate.
Further preferably, the lignosulfonate is calcium lignosulfonate.
Further preferably, the molecular weight of the lignosulfonate is 800-10000, and the reducing sugar is less than or equal to 30%.
Further preferably, the sodium hexametaphosphate is technical grade, P2O5≥68％；
Further preferably, the sodium tripolyphosphate is in an industrial grade, and the content is more than or equal to 96%.
Preferably, the surfactant comprises one or more of triethanolamine, glycerol, diethanol monoisopropanolamine.
Preferably, the triethanolamine, the glycerol and the diethanol monoisopropanolamine are respectively industrial organic reagents, and the content of the triethanolamine, the glycerol and the diethanol monoisopropanolamine is not less than 85%.
Preferably, the dispersion carrier is anhydrite.
Further preferably, the anhydrite has a 45-micron square-hole sieve residue of 20-40 percent and SO3More than or equal to 50 percent and less than or equal to 4 percent of crystal water, which is one or two of natural anhydrite or industrial byproduct gypsum.
Preferably, the raw materials are used in the following amounts: 45.0-70.5% of reinforcing excitant, 0.2-5.0% of modifier, 0.5-8.5% of surfactant and 10.5-43.0% of dispersing carrier.
Further preferably, the enhancer activator comprises: 10-45% of sodium sulfate, 2.0-15.0% of sodium acetate, 5.0-30.0% of sodium silicate and 3.0-15.0% of calcium formate, which account for the mass percentage of the special excitant.
Further preferably, the modifier comprises 0-1.0% of lignosulfonate, 0-5.0% of sodium hexametaphosphate and 0-2.0% of sodium tripolyphosphate, and accounts for the mass percent of the special excitant.
Further preferably, the surfactant comprises: 0-8.5% of triethanolamine, 0-5.0% of glycerol and 0.5-8.5% of diethanol monoisopropanolamine, which account for the mass percent of the special excitant.
(II) a preparation method of the composite cement special excitant with few silicate clinker components, which comprises the following steps:
step 1, mixing and stirring one or more of triethanolamine, glycerol and diethanol monoisopropanolamine uniformly in advance to obtain a surfactant mixed solution A;
step 2, mixing an enhanced excitant, sodium hexametaphosphate or/and sodium tripolyphosphate and a dispersion carrier, adding the surfactant mixed solution A, continuously mixing and grinding to obtain the mixture with the specific surface area of 200-300 m2A mixture B per kg;
and 3, fully mixing and uniformly stirring the mixture B and the lignosulfonate to obtain the composite material.
Compared with the prior art, the invention has the beneficial effects that:
1) the special excitant for the composite cement with less silicate clinker components has simple production and preparation method, no toxic chemical reagent, belongs to a healthy and environment-friendly process additive, and has better compatibility and adaptability with less clinker cement.
2) The silicate clinker consumption of the low-clinker cement produced by using the low-silicate-clinker-component composite special-purpose exciting agent for cement is low, the clinker component can be as low as about 30%, the total amount of mixed material components of slag, fly ash, pozzolana, industrial solid waste, limestone and the like can be as high as about 70%, energy and limestone resources can be saved, and CO is reduced2Discharging; meanwhile, a large amount of industrial solid wastes such as slag, fly ash and furnace bottom slag can be consumed, and the environment is protected.
3) The cement with less clinker and concrete produced by using the special excitant for the composite cement with less silicate clinker components has better construction workability such as fluidity, cohesiveness, water retention and the like; the cement hydration heat is low, and the cement concrete is not easy to crack; the preparation method can reduce the production cost of cement, realize the development of low-carbon environment-friendly green products and technologies, and the composite cement with few silicate clinker components produced by using the special excitant can be applied to the projects such as concrete, building wall building, plastering, terrace, decoration and the like.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention.
Example 1
The special exciting agent for the composite cement with few silicate clinker components comprises the following preparation raw materials in percentage by weight: 38% of sodium sulfate, 5.0% of sodium acetate, 8.0% of sodium silicate, 8.0% of calcium formate, 0.05% of lignosulfonate, 0.5% of sodium hexametaphosphate, 1.5% of triethanolamine, 1.5% of diethanol monoisopropanolamine and 37.45% of anhydrite.
Wherein, the sodium sulfate is industrial grade, the content is more than or equal to 99 percent, and the water insoluble substance is less than or equal to 0.03 percent; the sodium acetate is industrial anhydrous sodium acetate, and the content is more than or equal to 98 percent; the sodium silicate is of industrial grade, the modulus is 1-2.85, the granularity is 200 meshes, and the content is more than or equal to 98 percent; the calcium formate is industrial grade, light brown crystalline powder, and the content is more than or equal to 99 percent; the molecular weight of the calcium lignosulphonate is 800-10000, and the reducing sugar is less than or equal to 30%; sodium hexametaphosphate is technical grade, P2O5Not less than 68 percent; triethanolamine and diethanolisopropanolamine are industrial organic reagents, and the content is more than or equal to 85 percent; the anhydrite is fluorgypsum, the residue of a 45 mu m square-hole sieve is 20 to 40 percent, and SO3Not less than 50% and not more than 2% of crystal water.
The preparation method of the special composite cement excitant with less silicate clinker components comprises the following steps:
step 1, mixing and stirring triethanolamine and diethanolisopropanolamine to obtain a surfactant mixed solution A;
step 2, mixing the enhanced excitant (sodium sulfate, sodium acetate, sodium silicate and calcium formate), sodium hexametaphosphate and anhydrite, adding the surfactant mixed liquor A, continuously mixing and grinding to obtain the mixture with the specific surface area of 200-300 m2A mixture B per kg;
and 3, fully mixing and uniformly stirring the mixture B and the lignosulfonate to obtain the special excitant SJF1# for the composite cement with less silicate clinker components.
Example 2
The special exciting agent for the composite cement with few silicate clinker components comprises the following preparation raw materials in percentage by weight: 35% of sodium sulfate, 10.0% of sodium acetate, 10.0% of sodium silicate, 10.0% of calcium formate, 0.05% of lignosulfonate, 0.3% of sodium hexametaphosphate, 0.3% of sodium tripolyphosphate, 4.0% of diethanol monoisopropanolamine and 30.35% of anhydrite.
Wherein, the sodium sulfate is industrial grade, the content is more than or equal to 99 percent, and the water insoluble substance is less than or equal to 0.03 percent; the sodium acetate is industrial anhydrous sodium acetate, and the content is more than or equal to 98 percent; the sodium silicate is of industrial grade, the modulus is 1-2.85, the granularity is 200 meshes, and the content is more than or equal to 98 percent; the calcium formate is industrial grade, light brown crystalline powder, and the content is more than or equal to 99 percent; the molecular weight of the calcium lignosulphonate is 800-10000, and the reducing sugar is less than or equal to 30%; sodium hexametaphosphate is technical grade, P2O5Not less than 68 percent; the sodium tripolyphosphate is of industrial grade, and the content is more than or equal to 96 percent; the diethanol monoisopropanolamine is an industrial organic reagent, and the content is more than or equal to 85 percent; the anhydrite is fluorgypsum, the residue of a 45 mu m square-hole sieve is 20 to 40 percent, and SO3Not less than 50% and not more than 2% of crystal water.
The preparation method of the special composite cement excitant with less silicate clinker components comprises the following steps:
step 1, stirring diethanol monoisopropanolamine uniformly in advance to obtain a surfactant solution A;
step 2, mixing the enhanced excitant (sodium sulfate, sodium acetate, sodium silicate and calcium formate), sodium hexametaphosphate, sodium tripolyphosphate and anhydrite, adding the surfactant solution A, continuously mixing and grinding to obtain the mixture with the specific surface area of 200-300 m2A mixture B per kg;
and 3, fully mixing and uniformly stirring the mixture B and the lignosulfonate to obtain the special excitant SJF2# for the composite cement with less silicate clinker components.
Example 3
The special exciting agent for the composite cement with few silicate clinker components comprises the following preparation raw materials in percentage by weight: 40% of sodium sulfate, 5.0% of sodium acetate, 5.0% of sodium silicate, 10.0% of calcium formate, 0.05% of lignosulfonate, 0.3% of sodium hexametaphosphate, 0.3% of sodium tripolyphosphate, 1.5% of glycerol, 2.0% of diethanol monoisopropanolamine and 35.35% of anhydrite.
Wherein, the sodium sulfate is industrial grade, the content is more than or equal to 99 percent, and the water insoluble substance is less than or equal to 0.03 percent; the sodium acetate is industrial anhydrous sodium acetate, and the content is more than or equal to 98 percent; sodium silicate is industrial grade, modulus is 1-2.85, and granularity200 meshes, the content is more than or equal to 98 percent; the calcium formate is industrial grade, light brown crystalline powder, and the content is more than or equal to 99 percent; the molecular weight of the calcium lignosulphonate is 800-10000, and the reducing sugar is less than or equal to 30%; sodium hexametaphosphate is technical grade, P2O5Not less than 68 percent; the sodium tripolyphosphate is of industrial grade, and the content is more than or equal to 96 percent; glycerol and diethanol monoisopropanolamine are industrial organic reagents, and the content is more than or equal to 85 percent; the anhydrite is natural gypsum, the residue of a 45 mu m square hole sieve is 20 to 40 percent, and SO3Not less than 50% and not more than 4% of crystal water.
The preparation method of the special composite cement excitant with less silicate clinker components comprises the following steps:
step 1, mixing and stirring glycerol and diethanolisopropanolamine to obtain a surfactant mixed solution A;
step 2, mixing the enhanced excitant (sodium sulfate, sodium acetate, sodium silicate and calcium formate), sodium hexametaphosphate, sodium tripolyphosphate and anhydrite, adding the surfactant mixed liquor A, continuously mixing and grinding to obtain the mixture with the specific surface area of 200-300 m2A mixture B per kg;
and 3, fully mixing and uniformly stirring the mixture B and the lignosulfonate to obtain the special excitant SJF3# for the composite cement with less silicate clinker components.
The special exciting agent for the composite cement with less silicate clinker components has the following specific functions:
the reinforcing excitant is added with less silicate clinker component composite cement and participates in the preparation of the cement, so that the grinding efficiency can be improved, the polycondensation reaction is promoted to mainly form amorphous aluminosilicate gel through active excitation, the activity of a cementing material is improved, the filling effect of a mixed material is enhanced, the hydration of crystal nuclei can be promoted at the early stage, the dry shrinkage can be reduced at the later stage, and the compactness and the mechanical property of the concrete are improved.
The lignosulfonate is added into the composite cement with less silicate clinker components, so that the grinding efficiency of the cement can be improved, the particle composition of the cement is improved, the dispersion performance of the cement in concrete is enhanced, the viscosity of the concrete is reduced, and the early and later strength of the concrete is improved. The sodium hexametaphosphate and the sodium tripolyphosphate are added with little silicate clinker component to prepare the composite cement, so that the grinding efficiency of the cement is improved, the fluidity of a mixture is improved, and the later strength of the concrete is improved.
The surfactant and cations in the cement and the active mixed material have a complex reaction, participate and accelerate the hydration process of the cement, improve the strength of the cement, particularly greatly contribute to the improvement of the later strength of the set cement, and the cost performance of the special excitant can be properly adjusted by using different surfactants.
The anhydrite can keep the low silicate clinker component and the special composite cement excitant with better dispersibility, improve the uniformity of dispersion, improve the fluidity of concrete, accelerate the hydration process of the concrete and improve the early strength and the durability of the concrete.
The special excitant provided by the invention can be used for producing the composite cement with less silicate clinker components, and has more obvious advantages and more environmental protection when being applied to the aspects of building walls, plastering, terraces, decoration and the like. The composite cement with less silicate clinker components prepared by blending the content and the grain composition of the cement components and adopting a new cement technology and the like can better meet the special performance requirements of concrete. The composite cement containing less silicate clinker components and the multi-component mixed material have more outstanding advantages in the aspects of improving and controlling the performance of cement and concrete.
The detection standard and method of the relevant performance of the above embodiment are as follows:
the composite cement with less silicate clinker components comprises the following components: 20-30% of portland cement clinker and gypsum, 20-30% of slag powder, 15-25% of fly ash, 20-25% of limestone powder and 10-15% of aluminosilicate mineral powder, wherein the composite cement blank cement with less portland clinker components is prepared by selecting a fixed ratio (28% of clinker, 4% of gypsum, 20% of fly ash, 28% of slag and 20% of limestone) from the above components. The special excitants SJF1#, SJF2# and SJF3# obtained in the above examples 1-3 and used for the composite cement with less silicate clinker components are respectively added in 4% to the blank cement to prepare different composite cements with less silicate clinker components.
The special exciting agent obtained in the embodiment 1-3 is used for testing indexes such as sieve residue, specific surface area, water requirement for standard consistency, setting time, fluidity, compressive strength, water retention rate and the like of a 45 mu m square-hole sieve for preparing composite cement with different small silicate clinker components according to standard testing methods such as a clean slurry fluidity method (a substitution method) in GB/T1345-2005 cement fineness test method, a cement standard consistency water consumption amount, setting time and stability test method in GB/T1346 cement standard consistency test method, JC/T1083-2008 cement and additive compatibility test method, GB/T17671-1999 cement strength test method (ISO method), GB/T3183-2017 masonry cement annex A water retention rate test method for masonry cement and the like, and the test results are shown in tables 1-2. In tables 1-2, comparative example 1 is commercial M32.5 masonry cement, and national standard M32.5 is a technical requirement value in GB/T3183-2017 masonry cement.
TABLE 1 test result table of control index for preparing cement with less clinker by using special exciting agent
As seen from Table 1, compared with blank cement, the fineness index of the composite cement with less silicate clinker components prepared by the special excitant obtained in the embodiments 1-3 meets the technical index requirements in GB/T3183-2017 masonry cement, the standard consistency water demand performance index is stable, and the workability of concrete can be better met.
TABLE 2 table of the quality index test results of cement with less clinker prepared by special exciting agent
As seen from Table 2, the special excitant obtained in the examples 1-3 is used for preparing the composite cement with less silicate clinker components, compared with the air white cement, the water retention is obviously improved, the compressive strength at each age is obviously improved, the technical index requirements in GB/T3183-2017 masonry cement are met, and compared with the conventional similar same-grade cement, the special excitant has the advantages of higher strength, better rheological property, better workability of the cement and better compatibility with additives.
The composite cement with less silicate clinker components prepared by the special excitant for the composite cement with less silicate clinker components has more outstanding advantages in the aspects of saving energy and resources, improving and regulating the performance of cement and concrete, and specifically comprises the following components: (1) the special excitant has simple production and preparation method, no toxic chemical reagent, environment-friendly process additive and better compatibility and adaptability with less clinker cement; (2) the silicate clinker has less consumption, can save energy and limestone resources, and reduce CO2Discharging; (3) the cohesive property of the cement can be improved, and the later strength of the cement and the compactness of a concrete structure are improved; (4) the water demand of cement and concrete can be reduced, and the working performance of the cement and the concrete can be improved; (5) the water retention performance of cement and concrete can be improved; (6) the early strength of the cement can be improved, and the concrete bleeding can be prevented; (7) the industrial solid wastes such as slag, fly ash and furnace bottom slag can be greatly absorbed, and the environment is protected; (8) can reduce the production cost of cement and realize the development of low-carbon environment-friendly green products and technologies.
The special excitant for the composite cement with less silicate clinker components, which is used for preparing the composite cement with less silicate clinker components, can save energy and limestone resources, reduce energy consumption and reduce carbon dioxide emission. The early and later strength of the cement is improved in a balanced manner, the water demand of the cement is reduced, the workability of the cement is improved, and the compactness of the concrete is improved. Particularly has obvious advantages in greatly reducing the component content of portland cement clinker and the production cost of cement and realizing low carbon, green and environmental protection, and belongs to a green and environmental-friendly low carbon product and technology.
Although the present invention has been described in detail in this specification with reference to specific embodiments and illustrative embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the present invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The special exciting agent for the composite cement with few silicate clinker components is characterized by comprising the following preparation raw materials: reinforcing excitant, modifier, surfactant and dispersing carrier.
2. The special excitant for the low-silicate clinker component composite cement as claimed in claim 1, wherein the reinforcing excitant is alkali metal salt or/and alkaline earth metal salt.
3. The few-silicate clinker component exciting agent special for composite cement according to claim 2, wherein the alkali metal salt comprises one or more of sodium sulfate and sodium acetate; the alkaline earth metal salt comprises one or more of sodium silicate and calcium formate.
4. The special excitant for the low-silicate clinker component composite cement as claimed in claim 1, wherein the modifier comprises one or more of lignosulfonate, sodium hexametaphosphate and sodium tripolyphosphate.
5. The few-silicate-clinker-component special excitant for composite cement according to claim 1, wherein the surfactant comprises one or more of triethanolamine, glycerol, diethanol monoisopropanolamine; the dispersion carrier is anhydrite.
6. The special exciting agent for the low-silicate clinker component composite cement as claimed in claim 1, wherein the dosage of the raw materials is as follows: 20.5-70.5% of reinforcing excitant, 0.2-5.0% of modifier, 0.5-8.5% of surfactant and 10.5-43.0% of dispersing carrier.
7. The few-silicate-clinker-component special excitant for composite cement according to claim 3, wherein the reinforcing excitant comprises: 10-45% of sodium sulfate, 2.0-15.0% of sodium acetate, 5.0-30.0% of sodium silicate and 3.0-15.0% of calcium formate, which account for the mass percentage of the special excitant.
8. The special excitant for the compound cement with few silicate clinker components as claimed in claim 4, wherein the modifier comprises 0-1.0% of lignosulfonate, 0-5.0% of sodium hexametaphosphate and 0-2.0% of sodium tripolyphosphate, and accounts for the mass percentage of the special excitant.
9. The special excitant for low-silicate clinker component composite cement as claimed in claim 5, wherein the surfactant comprises: 0-8.5% of triethanolamine, 0-5.0% of glycerol and 0.5-8.5% of diethanol monoisopropanolamine, which account for the mass percent of the special excitant.
10. The preparation method of the special exciting agent for the composite cement with few silicate clinker components is characterized by comprising the following steps of:
step 1, mixing and stirring one or more of triethanolamine, glycerol and diethanol monoisopropanolamine uniformly in advance to obtain a surfactant mixed solution A;
step 2, mixing an enhanced excitant, sodium hexametaphosphate or/and sodium tripolyphosphate and a dispersion carrier, adding the surfactant mixed solution A, continuously mixing and grinding to obtain the mixture with the specific surface area of 200-300 m2A mixture B per kg;
and 3, fully mixing and uniformly stirring the mixture B and the lignosulfonate to obtain the composite material.
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