WO2021217784A1 - 一种粉煤灰固废纤维免烧陶粒及其制作方法 - Google Patents
一种粉煤灰固废纤维免烧陶粒及其制作方法 Download PDFInfo
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- WO2021217784A1 WO2021217784A1 PCT/CN2020/094476 CN2020094476W WO2021217784A1 WO 2021217784 A1 WO2021217784 A1 WO 2021217784A1 CN 2020094476 W CN2020094476 W CN 2020094476W WO 2021217784 A1 WO2021217784 A1 WO 2021217784A1
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- Prior art keywords
- fly ash
- solid waste
- ceramsite
- waste fiber
- powder
- Prior art date
Links
- 239000010881 fly ash Substances 0.000 title claims abstract description 76
- 239000002910 solid waste Substances 0.000 title claims abstract description 41
- 239000000835 fiber Substances 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 82
- 239000010902 straw Substances 0.000 claims abstract description 41
- 239000004568 cement Substances 0.000 claims abstract description 35
- 239000002956 ash Substances 0.000 claims abstract description 31
- 239000002893 slag Substances 0.000 claims abstract description 29
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 28
- 239000010440 gypsum Substances 0.000 claims abstract description 28
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 21
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 21
- 239000000654 additive Substances 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 238000000227 grinding Methods 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 6
- 230000000996 additive effect Effects 0.000 abstract 1
- 239000000292 calcium oxide Substances 0.000 description 14
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 14
- 238000010438 heat treatment Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 7
- 239000000920 calcium hydroxide Substances 0.000 description 7
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 7
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 6
- 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 4
- 238000005245 sintering Methods 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 238000003915 air pollution Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 240000000111 Saccharum officinarum Species 0.000 description 1
- 235000007201 Saccharum officinarum Nutrition 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- JCCZVLHHCNQSNM-UHFFFAOYSA-N [Na][Si] Chemical compound [Na][Si] JCCZVLHHCNQSNM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- ORVGYTXFUWTWDM-UHFFFAOYSA-N silicic acid;sodium Chemical compound [Na].O[Si](O)(O)O ORVGYTXFUWTWDM-UHFFFAOYSA-N 0.000 description 1
- 238000003900 soil pollution 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
- 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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Definitions
- the invention relates to the field of building materials, in particular to a non-fired ceramsite with fly ash solid waste fiber and a manufacturing method thereof.
- fly ash As a large coal-producing country in the world, China has a large amount of fly ash as an industrial waste.
- the discharge of fly ash not only occupies land resources and causes a waste of funds, but more seriously, it will cause serious air pollution, soil pollution and water resource pollution, and endanger the natural environment and human health. Therefore, comprehensive research on fly ash and reasonable reuse of discharged fly ash has obvious research value for protecting resources, protecting the environment, and benefiting civilization.
- Straw is the general term for the stems and leaves (ears) of mature crops. It usually refers to the remaining part of wheat, rice, corn, tubers, rape, cotton, sugar cane and other crops (usually coarse grains) after harvesting the seeds. At present, there are huge resources of straw , Its disposal is more difficult, and simple incineration will cause serious air pollution. Therefore, reasonable treatment of straw is of high value for resource utilization and environmental protection.
- ceramsite As a kind of lightweight aggregate for construction, ceramsite has received great attention for its light weight, heat preservation, environmental protection and other characteristics. It can replace gravel to produce ceramsite concrete, ceramsite blocks, and ceramsite wallboards. Quality wall materials or as roadbed materials. At present, ceramsites are mostly made of clay or other materials by sintering at high temperature, which consumes a large amount of clay resources and also consumes a large amount of energy such as coal, gas, electricity, etc. The exhaust gas emissions generated will also pollute the environment. , And the cost is high.
- Non-fired ceramsite refers to the ceramsite prepared by using various active waste residues and adopting a reasonable formula and curing process; compared with sintered ceramsite, the production process of non-fired ceramsite is simple and efficient.
- Industrial solid waste conforms to the development trend of energy saving and environmental protection; in the prior art, the production method of using industrial solid waste to make non-sintered ceramsite overcomes the disadvantages of high cost and high pollution of sintered ceramsite, but its production process is relatively Complicated, and the produced ceramsite has a small particle size.
- the present invention provides a kind of fly ash solid waste fiber non-burning ceramsite and a manufacturing method thereof, which can consume a large amount of solid waste such as fly ash and straw and use it for secondary use, while avoiding environmental damage. It causes pollution, and the production method is simple, does not require sintering, reduces energy consumption, and has energy-saving and low-carbon environmental protection effects.
- the present invention firstly proposes a kind of fly ash solid waste fiber non-burning ceramsite, which is prepared from the following raw materials according to mass percentage: fly ash 70%-75%, straw 10% ⁇ 15%, furnace ash 1.0% ⁇ 5.0%, fine slag powder 5.0% ⁇ 10%, sodium silicate 1.0% ⁇ 2.0%, desulfurized gypsum 1.0% ⁇ 2.0%, cement 1.0% ⁇ 2.0%, admixture 1.0% ⁇ 2.0% .
- the fly ash solid waste fiber non-fired ceramsite is specifically formulated from the following raw materials according to mass percentages: fly ash 73.5%, straw 11.0%, furnace ash 3.4%, slag powder 6.0%, sodium silicate 1.2% %, desulfurization gypsum 1.5%, cement 1.8%, admixture 1.6%.
- the grated straw has a particle size of no more than 1 mm, a fiber length ⁇ 10 mm, and a moisture content of less than 1.0%.
- the part of the furnace ash with a particle size> 1 mm does not exceed 5%, and the moisture content is ⁇ 1.0%.
- the desulfurized gypsum has a free water content of 5% to 10%, an average particle size of 20 ⁇ m to 50 ⁇ m, and a 200-mesh sieve residue of 5.0%.
- the content of f-CaO (active calcium oxide and calcium hydroxide in the fly ash) in the fly ash is less than 1.0%, and the water content is less than 1.0%.
- the sodium silicate is in powder form, the mass percentage of water insoluble matter is ⁇ 0.04%, the mass percentage of water content is ⁇ 25%, the modulus is 2.6-2.8, and the particle size is 20-40 mesh.
- the loss on ignition of the slag powder is -2.0% to 1.5%
- the specific surface area after grinding is more than 400 m 2 /kg
- the 28-day activity is not less than 95%.
- the cement is P.O42.5 cement, and all indicators meet (GB175-2007), wherein the 3-day flexural strength is not less than 3.5MPa, the 3-day compressive strength is not less than 17MPa, and the 28-day flexural strength is not less than Less than 6.5MPa, and the 3-day compressive strength is not less than 42.5MPa.
- the present invention also proposes a method for making non-fired ceramsite with fly ash solid waste fiber, including:
- the present invention grinds the straw into powder, mixes it into the formula, and wraps it in the ceramsite to form a closed tissue, which has the function of light weight and heat preservation; it can be used for the secondary use of the straw to make full use of resources at the same time Can avoid pollution to the environment.
- fly ash is made into a light ceramsite aggregate with a certain strength, which replaces part of the currently scarce natural sand and gravel resources, and is used for concrete, wall insulation materials, water treatment filtration, etc. required by various occasions. And so on, the secondary utilization of fly ash can avoid pollution to the environment.
- the present invention uses furnace ash as a solid waste material, and also as a raw material for the fly ash solid waste fiber non-fired ceramsite of the present invention.
- the secondary utilization is carried out to make full use of resources and solve the problem of furnace ash. Handling issues.
- the present invention can also absorb industrial wastes such as slag powder and desulfurized gypsum, which broadens the utilization of the above-mentioned solid waste materials.
- the invention adopts the non-sintering process, the production method is simple, and large-scale calcining equipment is not needed for sintering, which reduces the energy consumption and has the environmental protection effect of energy saving and low carbon.
- Embodiment 1 The method for manufacturing the non-fired ceramsite of fly ash solid waste fiber in this embodiment:
- fly ash is weighed at 75% by mass
- straw powder is weighed at 10% by mass
- furnace ash is weighed at 5.0% by mass
- slag powder is weighed at 5.0% by mass
- sodium silicate is weighed at 1.0% by mass.
- the straw powder obtained after straw grinding has a particle size of 1mm, a fiber length of 10mm, and a moisture content of 0.5%; the part of the ash with a particle size> 1mm is 5% and moisture content is 0.5%; the free water content of desulfurized gypsum is 5%, the average particle size is 20 ⁇ m, the 200-mesh sieve is 5.0%; the content of f-CaO (active calcium oxide and calcium hydroxide in the fly ash) in the fly ash is 0.5%, and the water content is 0.5%; silicic acid Sodium is in powder form, the mass percentage of water-insoluble matter is 0.04%, the mass percentage of water content is 25%, the modulus is 2.6, and the particle size is 20 mesh; the ignition loss of slag powder is -2.0%, after grinding The specific surface area is 450m 2 /kg, and the 28-day activity is 95%; the cement is P.O42.5 cement, all indicators are in line with (GB175-2007), of which the 3-day flex
- Embodiment 2 The manufacturing method of the non-fired ceramsite of fly ash solid waste fiber in this embodiment:
- fly ash is weighed at 70% by mass
- straw powder is weighed at 15% by mass
- furnace ash is weighed at 1.0% by mass
- slag powder is weighed at 10% by mass
- sodium silicate is weighed at 1.0% by mass.
- the straw powder obtained after straw grinding has a particle size of 0.5mm, a fiber length of 5mm, and a moisture content of 0.9%; the part of the ash with a particle size greater than 1mm is 4%, and the moisture content is 0.9%; the free water content of desulfurized gypsum
- the average particle size is 50 ⁇ m, and the 200-mesh sieve is 5.0%; the content of f-CaO (active calcium oxide and calcium hydroxide in the fly ash) in the fly ash is 0.9%, and the water content is 0.9%;
- Sodium is powder, the mass percentage of water insoluble matter is 0.03%, the mass percentage of water content is 20%, the modulus is 2.8, the particle size is 40 mesh; the ignition loss of slag powder is 1.5%, after grinding
- the specific surface area is 500m 2 /kg, and the 28-day activity is 96%; the cement is P.O42.5 cement, all indicators conform to (GB175-2007), of which the 3-day flexural strength is 4.0MP
- Embodiment 3 The method for manufacturing the non-fired ceramsite of fly ash solid waste fiber in this embodiment:
- fly ash is weighed at 73.5% by mass
- straw powder is weighed at 11.0% by mass
- furnace ash is weighed at 3.4% by mass
- slag powder is weighed at 6.0% by mass
- sodium silicate is weighed at 1.2% by mass.
- % Is weighed, desulfurized gypsum is weighed at 1.5% by mass, cement is weighed at 1.8% by mass, and admixtures are weighed at 1.6% by mass.
- the straw powder obtained after straw grinding has a particle size of 0.8mm, a fiber length of 7mm, and a moisture content of 0.3%; the part of the ash with a particle size> 1mm is 2%, and the moisture content is 0.2%; free water content of desulfurized gypsum
- the average particle size is 35 ⁇ m, and the 200-mesh sieve is 5.0%; the content of f-CaO (active calcium oxide and calcium hydroxide in the fly ash) in the fly ash is 0.2%, and the water content is 0.2%; Sodium is in powder form, the mass percentage of water insoluble matter is 0.02%, the mass percentage of water content is 10%, the modulus is 2.7, and the particle size is 30 mesh; the ignition loss of slag powder is 0.5%, after grinding
- the specific surface area is 600m 2 /kg, and the 28-day activity is 98%; the cement is P.O42.5 cement, all indicators conform to (GB175-2007), of which the 3-day flexural strength is 5.0MPa
- Embodiment 4 The method for manufacturing the non-fired ceramsite of fly ash solid waste fiber in this embodiment:
- fly ash is weighed as 73.0% by mass
- straw powder is weighed as 10.5% by mass
- furnace ash is weighed as 4.0% by mass
- slag powder is weighed as 5.5% by mass
- sodium silicate is weighed as 2.0% by mass.
- % Is weighed, desulfurized gypsum is weighed by 2.0% by mass, cement is weighed by 1.5% by mass, and admixtures are weighed by 1.5% by mass.
- the straw powder obtained after straw grinding has a particle size of 0.3mm, a fiber length of 4mm, and a moisture content of 0.6%; the part of the ash with a particle size> 1mm is 3% and moisture content is 0.7%; the free water content of desulfurized gypsum
- the average particle size is 25 ⁇ m, and the 200-mesh sieve is 5.0%; the content of f-CaO (active calcium oxide and calcium hydroxide in the fly ash) in fly ash is 0.7%, and the water content is 0.7%; silicon Sodium is in powder form, the mass percentage of water insoluble matter is 0.01%, the mass percentage of water content is 15%, the modulus is 2.65, the particle size is 25 mesh; the ignition loss of slag powder is 1.0%, after grinding
- the specific surface area is 550m 2 /kg, and the 28-day activity is 97%; the cement is P.O42.5 cement, all indicators conform to (GB175-2007), of which the 3-day flexural strength is 6.0MPa,
- Embodiment 5 In this embodiment, a method for making non-fired ceramsite with fly ash solid waste fiber:
- fly ash is weighed at 73.8% by mass
- straw powder is weighed at 11.5% by mass
- furnace ash is weighed at 3.2% by mass
- slag powder is weighed at 6.3% by mass
- sodium silicate is weighed at 1.5% by mass.
- % Is weighed, desulfurized gypsum is weighed at 1.2% by mass, cement is weighed at 1.2% by mass, and admixtures are weighed at 1.3% by mass.
- the straw powder obtained after straw grinding has a particle size of 0.6mm, a fiber length of 9mm, and a moisture content of 0.8%; the part of the ash with a particle size greater than 1mm is 1%, and the moisture content is 0.4%; free water content of desulfurized gypsum
- the average particle size is 40 ⁇ m, and the 200-mesh sieve is 5.0%; the content of f-CaO (active calcium oxide and calcium hydroxide in the fly ash) in fly ash is 0.3%, and the water content is 0.3%; Sodium is in powder form, the mass percentage of water insoluble matter is 0.005%, the mass percentage of water content is 5%, the modulus is 2.75, the particle size is 35 mesh; the ignition loss of slag powder is -1.0%, finely ground After the specific surface area is 650m 2 /kg, the 28-day activity is 99%; the cement is P.O42.5 cement, all indicators are in line with (GB175-2007), of which the 3-day flexural strength is
- Embodiment 6 The manufacturing method of a kind of non-fired ceramsite of fly ash solid waste fiber in this embodiment:
- fly ash is weighed at 70.5% by mass
- straw powder is weighed at 12.5% by mass
- furnace ash is weighed at 3.8% by mass
- slag powder is weighed at 6.8% by mass
- sodium silicate is weighed at 1.7 by mass percentage.
- % Is weighed, desulfurized gypsum is weighed as 1.6% by mass, cement is weighed as 1.4% by mass, and admixture is weighed as 1.7% by mass.
- the straw powder obtained by grinding straw has a particle size of 0.9mm, a fiber length of 8mm, and a moisture content of 0.4%; the part of the ash with a particle size> 1mm is 2.5%, and the moisture content is 0.6%; the free water content of desulfurized gypsum
- the average particle size is 45 ⁇ m, and the 200-mesh sieve is 5.0%; the content of f-CaO (active calcium oxide and calcium hydroxide in the fly ash) in fly ash is 0.8%, and the water content is 0.8%; Sodium is in powder form, the mass percentage of water insoluble matter is 0.035%, the mass percentage of water content is 23%, the modulus is 2.78, the particle size is 38 mesh; the ignition loss of slag powder is -1.5%, finely ground After the specific surface area is 430m 2 /kg, the 28-day activity is 95.5%; the cement is P.O42.5 cement, all indicators are in line with (GB175-2007), of which the 3-day flexural strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
Claims (10)
- 一种粉煤灰固废纤维免烧陶粒,其特征在于,由以下原材料按照质量百分比配制而成:粉煤灰70%~75%、秸秆10%~15%、炉灰1.0%~5.0%、矿渣微粉5.0%~10%、硅酸钠1.0%~2.0%、脱硫石膏1.0%~2.0%、水泥1.0%~2.0%、外加剂1.0%~2.0%。
- 根据权利要求1所述的粉煤灰固废纤维免烧陶粒,其特征在于,由以下原材料按照质量百分比配制而成:粉煤灰73.5%、秸秆11.0%、炉灰3.4%、矿渣微粉6.0%、硅酸钠1.2%、脱硫石膏1.5%、水泥1.8%、外加剂1.6%。
- 根据权利要求1所述的粉煤灰固废纤维免烧陶粒,其特征在于,所述秸秆磨碎后的粒径不大于1mm,纤维长度≤10mm,水份<1.0%。
- 根据权利要求1所述的粉煤灰固废纤维免烧陶粒,其特征在于,所述炉灰中粒径>1mm的部分不超过5%,水份<1.0%。
- 根据权利要求1所述的粉煤灰固废纤维免烧陶粒,其特征在于,所述脱硫石膏自由水含量5%~10%,平均粒度20μm~50μm,200目筛余5.0%。
- 根据权利要求1所述的粉煤灰固废纤维免烧陶粒,其特征在于,所述粉煤灰中f-CaO的含量<1.0%,含水量<1.0%。
- 根据权利要求1所述的粉煤灰固废纤维免烧陶粒,其特征在于,所述硅酸钠为粉末状,水不溶物质量百分数≤0.04%,含水量质量百分数≤25%,模数为2.6~2.8,粒度为20~40目。
- 根据权利要求1所述的粉煤灰固废纤维免烧陶粒,其特征在于,所述矿渣微粉烧失量-2.0%~1.5%,磨细后的比表面积为400m 2/kg以上,28天活性不低于95%。
- 根据权利要求1所述的粉煤灰固废纤维免烧陶粒,其特征在于,所述水泥为P.042.5水泥,各项指标符合(GB175-2007),其中3天抗折强度不小于3.5MPa,3天抗压强度不小于17MPa,28天抗折强度不小于6.5MPa,3天抗压强度不小于42.5MPa。
- 根据权利要求1至8中任一项所述的粉煤灰固废纤维免烧陶粒的制作方法,其特征在于,包括:S1:按量称取秸秆粉末、炉灰、水泥、粉煤灰、脱硫石膏、矿渣微粉、硅酸钠和外加剂,置于干粉搅拌机中,先顺时针搅拌5min,然后逆时针再搅拌5min,获得搅拌均匀的粉料;S2:将步骤一中制备的粉料通过对辊造粒机制备免烧陶粒坯体;S3:将步骤二中制备的免烧陶粒坯体放入蒸养装置中,静停2h,以10℃/h的升温速度升温至50℃,湿度90%,恒温养护5h,再以15℃/h的升温速度升温至80℃,湿度95%,恒温养护5h,之后以15℃/h的降温速度降温至室温,即获得粉煤灰固废纤维免烧陶粒。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN115095074A (zh) * | 2022-06-17 | 2022-09-23 | 哈尔滨理工大学 | 基于绿色建筑所用的生态秸秆复合砌块 |
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CN114133213A (zh) * | 2021-11-12 | 2022-03-04 | 合肥工业大学 | 一种铁尾矿陶粒及其制备方法 |
CN114538955A (zh) * | 2022-02-25 | 2022-05-27 | 青岛光大集团工程有限公司 | 一种轻质陶粒混凝土及其制备方法 |
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CN116283228A (zh) * | 2023-01-29 | 2023-06-23 | 陕西博实翊圣新材料环保科技有限公司 | 一种建筑用固废基保温板的制备方法 |
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