CN113788657A - A kind of nickel iron slag basalt fiber active powder concrete and preparation method thereof - Google Patents
A kind of nickel iron slag basalt fiber active powder concrete and preparation method thereof Download PDFInfo
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- CN113788657A CN113788657A CN202111103013.8A CN202111103013A CN113788657A CN 113788657 A CN113788657 A CN 113788657A CN 202111103013 A CN202111103013 A CN 202111103013A CN 113788657 A CN113788657 A CN 113788657A
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- 239000002893 slag Substances 0.000 title claims abstract description 78
- 239000000843 powder Substances 0.000 title claims abstract description 75
- 239000004567 concrete Substances 0.000 title claims abstract description 72
- 229920002748 Basalt fiber Polymers 0.000 title claims abstract description 62
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 70
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000006004 Quartz sand Substances 0.000 claims abstract description 50
- 239000004568 cement Substances 0.000 claims abstract description 39
- 239000010881 fly ash Substances 0.000 claims abstract description 35
- 229910000863 Ferronickel Inorganic materials 0.000 claims abstract description 31
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 25
- 239000004576 sand Substances 0.000 claims abstract description 16
- 239000008030 superplasticizer Substances 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 16
- 238000012360 testing method Methods 0.000 claims description 15
- 238000000227 grinding Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 229910052593 corundum Inorganic materials 0.000 claims description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 8
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 230000001603 reducing effect Effects 0.000 claims description 5
- 229920005646 polycarboxylate Polymers 0.000 claims description 4
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims 1
- 229910010413 TiO 2 Inorganic materials 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000003973 paint Substances 0.000 claims 1
- 238000010422 painting Methods 0.000 claims 1
- 238000007873 sieving Methods 0.000 claims 1
- 239000000835 fiber Substances 0.000 abstract description 19
- 229910000831 Steel Inorganic materials 0.000 abstract description 13
- 239000010959 steel Substances 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000002910 solid waste Substances 0.000 abstract description 5
- 239000004574 high-performance concrete Substances 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 239000010453 quartz Substances 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000006185 dispersion Substances 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000012798 spherical particle Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910000629 Rh alloy Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- PXXKQOPKNFECSZ-UHFFFAOYSA-N platinum rhodium Chemical compound [Rh].[Pt] PXXKQOPKNFECSZ-UHFFFAOYSA-N 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 1
- 229910052569 sulfide mineral Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000011374 ultra-high-performance concrete Substances 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
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- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/46—Rock wool ; Ceramic or silicate fibres
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/144—Slags from the production of specific metals other than iron or of specific alloys, e.g. ferrochrome slags
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
本发明属于建筑固废在高性能混凝土应用以及工程结构应用领域，主要是涉及一种镍铁渣玄武岩纤维活性粉末混凝土及制备方法。一种镍铁渣玄武岩纤维活性粉末混凝土，包括以下重量份原料：水泥95~125份，超细粉煤灰48~63份，硅灰20~40份，玄武岩纤维15~24份，中细石英砂55~72份，细石英砂32~42份，特细石英砂17~25份。镍铁渣69‑93份，水17~27份，高效减水剂0.7~3.2份。本发明用镍铁渣替代石英砂不仅能够降低活性粉末混凝土的成本，还能解决镍铁渣低级利用带来的一系列环境问题，具有节能减排和绿色环保的意义。用玄武岩纤维替代钢纤维可以改善活性粉末混凝土中纤维的分散性，防止发生脆性破坏。用超细粉煤灰能缓解水泥短缺问题并减少水泥生产带来的二次污染。The invention belongs to the application field of construction solid waste in high-performance concrete and engineering structure, and mainly relates to a nickel-iron slag basalt fiber active powder concrete and a preparation method. A nickel-iron slag basalt fiber active powder concrete, comprising the following raw materials in parts by weight: 95-125 parts of cement, 48-63 parts of ultra-fine fly ash, 20-40 parts of silica fume, 15-24 parts of basalt fibers, medium and fine quartz 55-72 parts of sand, 32-42 parts of fine quartz sand, and 17-25 parts of extra-fine quartz sand. 69-93 parts of nickel-iron slag, 17-27 parts of water, and 0.7-3.2 parts of superplasticizer. In the present invention, replacing quartz sand with ferronickel slag can not only reduce the cost of active powder concrete, but also solve a series of environmental problems caused by the low-grade utilization of ferronickel slag, and has the significance of energy saving, emission reduction and green environmental protection. Replacing steel fibers with basalt fibers can improve fiber dispersion in reactive powder concrete and prevent brittle failure. The use of ultra-fine fly ash can alleviate the shortage of cement and reduce the secondary pollution caused by cement production.
Description
Technical Field
The invention belongs to the field of application of construction solid wastes in high-performance concrete and engineering structure application, and mainly relates to ferronickel slag basalt fiber active powder concrete and a preparation method thereof.
Background
At present, with the development of economic society and the continuous improvement of scientific technology, the demand of people on engineering materials exceeds the development of building materials. For example, concrete has ultrahigh strength, high toughness, high durability, high ductility, high volume stability, low cost, low volume weight, simple production process and the like, which are the targets of researchers and engineers, and reactive powder concrete is produced under the background.
The Reactive powder concrete (Reactive powder concrete for short) is innovative ultrahigh-performance concrete, and by optimizing the mixing proportion in the materials, the mechanical property and the durability of the concrete are further obviously improved, and the large span of the development of the performance of engineering materials is realized. Meanwhile, the advantages of high-strength concrete and fiber concrete are integrated, coarse aggregates are removed based on the closest packing theory, fine quartz sand is used as aggregates, a proper amount of steel fibers are doped, and novel green high-performance concrete is obtained by preparation methods such as pressurization, high temperature and the like. The difference between the active powder concrete and the traditional concrete lies in the lack of coarse aggregate, the active powder concrete has good mixture performance, ultrahigh strength, high durability, excellent ecological effect, strong chemical erosion resistance, high permeability resistance, good shock resistance and excellent plasticity development capability, is widely applied to the fields of civil engineering, offshore engineering, nuclear engineering, military engineering and the like, and has wide application prospect. However, the production and grinding costs of quartz powder and the manufacturing costs of steel fiber and cement are high in the production process of reactive powder concrete, and the application and popularization of the reactive powder concrete in building structures are limited.
The nickel-iron slag is also called nickel slag, which is solid waste slag generated in the process of smelting nickel-iron alloy and belongs to industrial solid waste. At present, the nickel produced in the nickel industry in the world is mainly from nickel sulfide mineral products, and accounts for about 60 percent of the total production. According to statistics, the ferronickel slag waste discharged every year in China is 2400-2700 million tons, accounts for more than 20% of the global discharge amount, and is the fourth major smelting industrial waste slag after iron slag, steel slag and red mud. However, the utilization rate of the ferronickel slag is low, and a large amount of ferronickel slag is in a stacking state, so that a large amount of land resources are occupied, and harmful substances in the ferronickel slag also permeate into soil to cause great harm to the environment. The nickel-iron slag is spherical particles with the particle size of 0-5mm, the particles are mechanically ground to the particle size of below 1mm, the nickel-iron slag is used for replacing part of quartz sand with the particle size to prepare active powder concrete, and the waste iron tailing powder is recycled.
The Basalt Fiber (Basalt Fiber) is a natural continuous Fiber which is formed by melting Basalt stone at high temperature of 1450-1500 ℃, drawing at high speed through a platinum-rhodium alloy wire drawing bushing and cooling. The concept of continuous basalt fiber melt drawing was first proposed by the french man PaulDhe in 1922, and forced to military needs by the 20 th century in the 60 th era, and a great deal of research on basalt fibers was conducted in the soviet union and the usa, and then the basalt fibers were rapidly developed. At present, the annual output of the basalt fiber in China is up to 3 ten thousand tons, and the number and the total output of production enterprises of the basalt fiber exceed the total amount in China. The basalt fiber has the advantages of high tensile strength, crack resistance, excellent impact toughness, high temperature resistance, acid and alkali corrosion resistance, heat insulation, sound insulation, good dispersibility, environmental protection, low cost and the like. The basalt fiber is used for replacing the steel fiber, so that the problem of dispersibility caused by high density of the steel fiber can be solved, and meanwhile, the cost of the active powder concrete can be reduced to a certain degree.
China mainly uses coal as basic fuel for power productionThe discharge amount of the fly ash increases year by year, the discharge amount reaches 5.7 hundred million tons by the end of 2020, and although the average utilization rate reaches 45-50%, the comprehensive utilization of the fly ash still faces severe examination. If the fly ash is not utilized or disposed quickly and efficiently, a large amount of cultivated land area is occupied, and irreversible damage is caused to soil and air. The ultrafine fly ash is a high-functionality cement mixed material or concrete mineral admixture obtained by grinding, selecting and collecting dust of solid waste generated by coal burning in a power plant. The fly ash is ground to the specific surface area of 700-1000m2The coal ash has a grain size of less than 7 mu m per kg, and can greatly improve the performance and application value of the coal ash: (1) the activity of the fly ash is obviously improved, and the mixing amount of the fly ash is increased when cement and concrete with the same strength grade are prepared; (2) a large amount of fine vitrified micro bubbles are generated in the grinding process, the lubricating effect among aggregates is improved, the water reducing effect of the mixture is obviously improved, and the water reducing rate can reach about 10 percent; (3) the ultrafine fly ash and the high-efficiency water reducing agent are mixed for use, and high-strength mortar and high-performance concrete can be prepared. The superfine fly ash is used for replacing cement, so that the consumption of the cement can be reduced, and the CO generated in cement production engineering can be indirectly reduced2And other harmful gases, and reduce greenhouse effect; on the other hand, the cost of the concrete can be reduced.
Therefore, the nickel-iron slag is added into the traditional active powder concrete to replace fine aggregate, so that the pollution of the nickel-iron slag to the environment can be reduced, and the cost of the active powder concrete can be reduced to a certain extent; the basalt fiber is used for replacing steel fiber, so that the dispersibility and compatibility of the fiber in concrete can be improved, and the manufacturing cost of the active powder concrete can be reduced; the superfine fly ash is used to replace cement, so that the strength of concrete can be improved at the same ratio, and the problem of cement shortage can be alleviated and the overall cost can be reduced.
Disclosure of Invention
Based on the problems in the prior art, the invention aims to provide the ferronickel slag basalt fiber active powder concrete and the preparation method thereof, which not only increase the using space of aggregate in the active powder concrete, enhance the performance of the active powder concrete, reduce the cost, but also effectively solve the problem of land occupation caused by environmental pollution.
In order to achieve the purpose, the invention adopts the following technical scheme.
The ferronickel slag basalt fiber active powder concrete comprises the following raw materials in parts by weight: 95-125 parts of cement, 48-63 parts of ultrafine fly ash, 20-40 parts of silica fume, 15-24 parts of basalt fiber, 55-72 parts of medium-fine quartz sand, 32-42 parts of fine quartz sand and 17-25 parts of extra-fine quartz sand. 69-93 parts of nickel-iron slag, 17-27 parts of water and 0.7-3.2 parts of a high-efficiency water reducing agent.
Further, the cement is 42.5 ordinary portland cement.
Further, the ultrafine fly ash: the grain diameter is less than 1 μm, 7000 meshes, and comprises the following components by mass percent: SiO 22：46％~53%、Al2O3：28%~32%、MgO：0.8％~1.2%、Fe2O3：5％~11%、CaO：3.5％~5.7%、SO3: 0.4% -1.0%, loss on ignition: 4.2% -5%.
Further, the basalt fiber is chopped continuous basalt fiber, the diameter is 10-14 μm, the length is 16-24mm, the tensile strength is 4100-5000MPa, the elastic modulus is 90-105GPa, and the density is 2.7-2.8g/cm3。
Further, the silica fume: comprises the following components in percentage by mass: SiO 22：92％~96%、MgO：0.3％~0.4%、C：1.8%~2.2%、CaO：0.9％~1.0%、Al2O3：0.7％~1.0%、Fe2O3：0.5％~0.6%、Na2O: 0.1-0.2% of superfine silica fume with the mesh of more than 1300.
Further, the quartz sand is SiO2More than 95 percent of white quartz sand, wherein the particle diameters of fine sand, medium fine sand and extra fine sand of the quartz sand are respectively 0.3-0.6mm, 0.15-0.3mm and 0-0.15mm, and the proportion of the fine sand, the medium fine sand and the extra fine sand is as follows: (2.1-2.8): (1.1-1.6): (1.5-1.95).
Further, the nickel-iron slag is micro powder with the particle size of 400-600 meshes after cooling, grinding and screening, and mainly comprises the following components in percentage by mass: SiO 22：35%~47%、Al2O3：5.7%~11%、CaO：0.7％~1.8%、TiO2：0.2％~0.8%、MnO：0.5%~0.6%、Fe2O3：1.3%~5.4%、SO3: 0.1% -0.2%, loss on ignition: 2.0% -2.5%.
Further, the water reducing agent is a Cika 325C type polycarboxylate superplasticizer, and the water reducing rate is over 30%.
A preparation method of ferronickel slag basalt fiber active powder concrete specifically comprises the following steps:
1. grinding the nickel-iron slag by a sample grinder and a ball mill respectively, grinding the nickel-iron slag by the sample grinder for 2-3 times, each time for 5-10min to obtain micro powder with the particle size of less than 0.075mm, and grinding the micro powder by the ball mill for 25-30min to obtain the ultrafine powder with the particle size of 400-600 meshes, namely the nickel-iron slag powder.
2. Wetting a horizontal single-shaft concrete mixer twice by using tap water, standing for 15-20min, draining accumulated water in the mixer, uniformly brushing an inner wall in a triple mould with the size of 100mm multiplied by 100mm by using an oily release agent (oil: water = 1: 1.5-1: 2) (sticking a small hole at the bottom of the mould before smearing to facilitate demoulding), and standing for 20-30 min.
3. Pouring the prepared quartz sand and basalt fiber at each stage into a stirrer for uniformly stirring for 175-245 s, and adding cement, ultrafine fly ash, silica fume and ferronickel slag powder into the stirrer for uniformly stirring for 235-245s after stirring.
4. After the components are mixed, slowly pouring 50% of polycarboxylic acid water reducing agent mixed with water, pouring the rest water and water reducing agent solution at a constant speed within 28-30s, stirring for 295 plus 305s, and then pouring the mixture into a mould and placing the mould on a vibrating table for vibrating.
5. Completely wrapping the test piece with a plastic film, and placing the test piece at a temperature: 23 ℃ and humidity: standing for 24-48 h at 95%, and demolding.
6. And (3) putting the demoulded test piece into a high-temperature steam curing box for high-temperature steam curing for 72 hours, setting the curing temperature to be 85 ℃ and raising the temperature to 95 ℃, setting the initial temperature to be 20-25 ℃, setting the temperature raising and lowering speed to be 15 ℃/h, and regularly observing the curing box and draining accumulated water in the positive box.
Compared with the prior art, the invention has the beneficial effects of.
(1) The ferronickel slag is spherical particles, contains more glass bodies inside, has a structure similar to that of the fly ash, has certain activity, can participate in cement hydration reaction, and can improve the mechanical property of the active powder concrete by replacing quartz sand with the ferronickel slag.
(2) The ferronickel slag is used for replacing quartz sand to prepare the active powder concrete, so that the cost of the active powder concrete can be reduced, a series of environmental problems caused by low-grade utilization of the ferronickel slag can be solved, and the preparation method has the significance of energy conservation, emission reduction and environmental protection.
(3) Compared with steel fiber, the basalt fiber has the advantages of similar density to aggregate, good compatibility with concrete, good impact toughness, excellent acid and alkali corrosion resistance and low price. The basalt fiber is used for replacing the steel fiber, so that the dispersibility of the fiber in the active powder concrete can be improved, the brittle failure can be prevented, and the cost can be reduced.
(4) Compared with fly ash, the ultra-fine fly ash shows more excellent morphological effect, volcanic ash effect and micro-aggregate effect. The fineness and the specific surface area of the active powder concrete can be increased through mechanical grinding, and macropores, capillary pores, transition pores and gel pores among coarse and fine aggregates, aggregates and cement paste and fibers and cement paste in the concrete are further filled, so that the structure of the active powder concrete is more compact, and the strength of the active powder concrete is improved. The superfine fly ash is used to replace cement, so that the building garbage can be absorbed, the environmental pollution can be reduced, the problem of cement shortage can be relieved, and the secondary pollution caused by cement production can be reduced.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The ferronickel slag basalt fiber active powder concrete comprises the following raw materials in parts by weight: 95-125 parts of cement, 48-63 parts of ultrafine fly ash, 20-40 parts of silica fume, 15-24 parts of basalt fiber, 55-72 parts of medium-fine quartz sand, 32-42 parts of fine quartz sand and 17-25 parts of extra-fine quartz sand. 69-93 parts of nickel-iron slag, 17-27 parts of water and 0.7-3.2 parts of a high-efficiency water reducing agent.
Further, the cement is 42.5 ordinary portland cement.
Further, the ultrafine fly ash: the grain diameter is less than 1 μm, 7000 meshes, and comprises the following components by mass percent: SiO 22：46％~53%、Al2O3：28%~32%、MgO：0.8％~1.2%、Fe2O3：5％~11%、CaO：3.5％~5.7%、SO3: 0.4% -1.0%, loss on ignition: 4.2% -5%.
Further, the basalt fiber is chopped continuous basalt fiber, the diameter is 10-14 μm, the length is 16-24mm, the tensile strength is 4100-5000MPa, the elastic modulus is 90-105GPa, and the density is 2.7-2.8g/cm3。
Further, the silica fume: comprises the following components in percentage by mass: SiO 22：92％~96%、MgO：0.3％~0.4%、C：1.8%~2.2%、CaO：0.9％~1.0%、Al2O3：0.7％~1.0%、Fe2O3：0.5％~0.6%、Na2O: 0.1-0.2% of superfine silica fume with the mesh of more than 1300.
Further, the quartz sand is SiO2More than 95 percent of white quartz sand, wherein the particle diameters of fine sand, medium fine sand and extra fine sand of the quartz sand are respectively 0.3-0.6mm, 0.15-0.3mm and 0-0.15mm, and the proportion of the fine sand, the medium fine sand and the extra fine sand is as follows: (2.1-2.8): (1.1-1.6): (1.5-1.95).
Further, the nickel-iron slag is micro powder with the particle size of 400-600 meshes after cooling, grinding and screening, and mainly comprises the following components in percentage by mass: SiO 22：35%~47%、Al2O3：5.7%~11%、CaO：0.7％~1.8%、TiO2：0.2％~0.8%、MnO：0.5%~0.6%、Fe2O3：1.3%~5.4%、SO3: 0.1% -0.2%, loss on ignition: 2.0% -2.5%.
Further, the water reducing agent is a Cika 325C type polycarboxylate superplasticizer, and the water reducing rate is over 30%.
A preparation method of ferronickel slag basalt fiber active powder concrete specifically comprises the following steps:
1. grinding the nickel-iron slag by a sample grinder and a ball mill respectively, grinding the nickel-iron slag by the sample grinder for 2-3 times, each time for 5-10min to obtain micro powder with the particle size of less than 0.075mm, and grinding the micro powder by the ball mill for 25-30min to obtain the ultrafine powder with the particle size of 400-600 meshes, namely the nickel-iron slag powder.
2. Wetting a horizontal single-shaft concrete mixer twice by using tap water, standing for 15-20min, draining accumulated water in the mixer, uniformly brushing an inner wall in a triple mould with the size of 100mm multiplied by 100mm by using an oily release agent (oil: water = 1: 1.5-1: 2) (sticking a small hole at the bottom of the mould before smearing to facilitate demoulding), and standing for 20-30 min.
3. Pouring the prepared quartz sand and basalt fiber at each stage into a stirrer for uniformly stirring for 175-245 s, and adding cement, ultrafine fly ash, silica fume and ferronickel slag powder into the stirrer for uniformly stirring for 235-245s after stirring.
4. After the components are mixed, slowly pouring 50% of polycarboxylic acid water reducing agent mixed with water, pouring the rest water and water reducing agent solution at a constant speed within 28-30s, stirring for 295 plus 305s, and then pouring the mixture into a mould and placing the mould on a vibrating table for vibrating.
5. Completely wrapping the test piece with a plastic film, and placing the test piece at a temperature: 23 ℃ and humidity: standing for 24-48 h at 95%, and demolding.
6. And (3) putting the demoulded test piece into a high-temperature steam curing box for high-temperature steam curing for 72 hours, setting the curing temperature to be 85 ℃ and raising the temperature to 95 ℃, setting the initial temperature to be 20-25 ℃, setting the temperature raising and lowering speed to be 15 ℃/h, and regularly observing the curing box and draining accumulated water in the positive box.
Example 1.
Weighing 105 parts of cement, 55 parts of ultrafine fly ash, 25 parts of silica fume, 19 parts of basalt fiber, 59 parts of medium-fine quartz sand, 35 parts of fine quartz sand, 19 parts of extra-fine quartz sand, 81 parts of ferronickel slag, 1.5 parts of a high-efficiency water reducing agent and 20 parts of water. Pouring the quartz sand and the basalt fiber of three grain grades into a stirrer at the same time, stirring for 180s at a constant speed, then putting the weighed cement, silica fume, ultrafine fly ash (the cement, the silica fume and the ultrafine fly ash are dried and uniformly stirred) and the ferronickel slag into the stirrer, uniformly stirring for 250s, pouring 50% of mixed water reducing agent solution and water within 30s, then pouring the rest 50% of water reducing agent solution and water at a constant speed, stirring for 300s, stirring to obtain the ferronickel slag basalt fiber active powder concrete mixture, pouring and testing a mold, uniformly vibrating, transferring the test piece into a laboratory environment with the humidity of 95% and the temperature of 23 ℃, standing for 24h, demolding, putting the test piece into a high-temperature steam curing box, and curing for 72h at the curing temperature of 85 ℃, the initial temperature of 21 ℃, and the temperature rising and falling rate of 15 ℃/h to obtain the ferronickel slag fiber active powder concrete.
Through determination: the compressive strength of the nickel iron slag basalt fiber active powder concrete after standing for 72 hours and high-temperature curing is 151.4MPa, and the flexural strength is 25.2 MPa.
Example 2.
Weighing 120 parts of cement, 63 parts of ultrafine fly ash, 32 parts of silica fume, 24 parts of basalt fiber, 69 parts of medium-fine quartz sand, 38 parts of fine quartz sand, 23 parts of extra-fine quartz sand, 93 parts of nickel-iron slag, 2 parts of high-efficiency water reducing agent and 24 parts of water. Pouring the quartz sand and the basalt fiber of three grain grades into a stirrer at the same time, stirring for 180s at a constant speed, immediately putting the weighed cement, silica fume, ultrafine fly ash (the cement, the silica fume and the ultrafine fly ash are dried and stirred uniformly) and ferronickel slag into the stirrer, stirring for 250s uniformly, observing the internal condition of the stirrer in the stirring process, pouring 50 percent of mixed water reducing agent solution and water in 30s, then pouring the rest 50 percent of water and the water reducing agent solution at a constant speed and stirring for 300s, stirring to obtain a nickel iron slag basalt fiber active powder concrete mixture, pouring and testing a mold, vibrating uniformly, moving the test piece to a laboratory environment with the humidity of 95 percent and the temperature of 23 ℃, and (3) standing for 24h, demoulding, and then placing into a high-temperature steam curing box for high-temperature curing for 72h, wherein the curing temperature is 85 ℃, the initial temperature is 21 ℃, and the temperature rising and falling speed is 15 ℃/h, so as to obtain the ferronickel slag active powder concrete.
Through determination: the compressive strength of the nickel iron slag basalt fiber active powder concrete after standing for 72h and high-temperature curing is 154.2MPa, and the flexural strength is 26.3 MPa.
Example 3.
Weighing 120 parts of cement, 48 parts of ultrafine fly ash, 32 parts of silica fume, 15 parts of basalt fiber, 69 parts of medium-fine quartz sand, 38 parts of fine quartz sand, 23 parts of extra-fine quartz sand, 69 parts of nickel-iron slag, 2 parts of a high-efficiency water reducing agent and 24 parts of water. Pouring the quartz sand and the basalt fiber of three grain grades into a stirrer at the same time, stirring for 180s at a constant speed, immediately putting the weighed cement, silica fume, ultrafine fly ash (the cement, the silica fume and the ultrafine fly ash are dried and stirred uniformly) and ferronickel slag into the stirrer, stirring for 250s uniformly, observing the internal condition of the stirrer in the stirring process, pouring 50 percent of mixed water reducing agent solution and water in 30s, then pouring the rest 50 percent of water and the water reducing agent solution at a constant speed and stirring for 300s, stirring to obtain a nickel iron slag basalt fiber active powder concrete mixture, pouring and testing a mold, vibrating uniformly, moving the test piece to a laboratory environment with the humidity of 95 percent and the temperature of 23 ℃, and (3) standing for 24h, demoulding, and then placing into a high-temperature steam curing box for high-temperature curing for 72h, wherein the curing temperature is 85 ℃, the initial temperature is 21 ℃, and the temperature rising and falling speed is 15 ℃/h, so as to obtain the ferronickel slag active powder concrete.
Through determination: the compressive strength of the nickel iron slag basalt fiber active powder concrete after standing for 72 hours and high-temperature curing is 147.7MPa, and the flexural strength is 24.2 MPa.
Comparative example 1.
The difference from the embodiment 1 is that 105 parts of cement, 25 parts of silica fume, 19 parts of steel fiber, 59 parts of medium-fine quartz sand, 35 parts of fine quartz sand, 19 parts of extra-fine quartz sand, 1.5 parts of high-efficiency water reducing agent and 20 parts of water are weighed according to the mixing ratio.
The compressive strength of the reactive powder concrete is measured as follows: 111.3MPa and 18.2MPa of breaking strength.
Comparative example 2.
The difference from the embodiment 2 is that the mixing ratio is 120 parts of cement, 32 parts of silica fume, 24 parts of steel fiber, 69 parts of medium-fine quartz sand, 38 parts of fine quartz sand, 23 parts of extra-fine quartz sand, 2 parts of high-efficiency water reducing agent and 24 parts of water.
The compressive strength and the flexural strength of the reactive powder concrete are 114.2MPa and 19.2MPa respectively.
Comparative example 3.
The difference from the embodiment 3 is that the mixing ratio is 120 parts of cement, 32 parts of silica fume, 15 parts of steel fiber, 69 parts of medium-fine quartz sand, 38 parts of fine quartz sand, 23 parts of extra-fine quartz sand, 2 parts of high-efficiency water reducing agent and 24 parts of water.
The compressive strength and the flexural strength of the reactive powder concrete are 107.7MPa and 17.5MPa respectively.
The results of the tests of the above three examples and three comparative examples can show that: the ferronickel slag basalt fiber active powder concrete can realize closest packing of aggregates, and improves the compressive strength and the flexural strength of RPC to a certain extent. Example 1: the compressive strength of the nickel iron slag basalt fiber active powder concrete is improved by 35 percent compared with that of the traditional RPC, and the flexural strength is improved by 38.5 percent; example 2: the compressive strength of the nickel iron slag basalt fiber active powder concrete is improved by 35 percent and the flexural strength is improved by 37 percent compared with that of the traditional RPC; example 3: the compressive strength of the nickel iron slag basalt fiber active powder concrete is improved by 37.1 percent compared with that of the traditional RPC, and the flexural strength is improved by 38.3 percent. The ferronickel slag is used for replacing quartz sand, basalt fiber is used for replacing steel fiber, and ultrafine fly ash is used for replacing cement, so that the preparation cost of RPC can be effectively reduced, and the damage to the natural environment can be reduced.
The above-described embodiments are preferable embodiments of the present invention, but the above-described embodiments are not limited to the above exemplary embodiments. Various modifications, changes, simplifications and adaptations may be made by those skilled in the art without departing from the spirit and principles of the invention and are intended to be included within the scope and spirit of the invention.
Claims (10)
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