CN108892535B - Building formwork self-leveling recycled lightweight aggregate concrete and preparation method thereof - Google Patents
Building formwork self-leveling recycled lightweight aggregate concrete and preparation method thereof Download PDFInfo
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- CN108892535B CN108892535B CN201811010142.0A CN201811010142A CN108892535B CN 108892535 B CN108892535 B CN 108892535B CN 201811010142 A CN201811010142 A CN 201811010142A CN 108892535 B CN108892535 B CN 108892535B
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- 239000004567 concrete Substances 0.000 title claims abstract description 32
- 238000009415 formwork Methods 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000000835 fiber Substances 0.000 claims abstract description 29
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000005204 segregation Methods 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 238000010276 construction Methods 0.000 claims abstract description 17
- 239000000314 lubricant Substances 0.000 claims abstract description 17
- 230000009974 thixotropic effect Effects 0.000 claims abstract description 17
- 239000010455 vermiculite Substances 0.000 claims abstract description 17
- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 17
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 17
- 239000006260 foam Substances 0.000 claims abstract description 16
- 239000004088 foaming agent Substances 0.000 claims abstract description 16
- 239000003381 stabilizer Substances 0.000 claims abstract description 16
- 239000002699 waste material Substances 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000012216 screening Methods 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 239000004568 cement Substances 0.000 claims description 10
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 9
- 239000011707 mineral Substances 0.000 claims description 9
- 235000010755 mineral Nutrition 0.000 claims description 9
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 9
- 239000002440 industrial waste Substances 0.000 claims description 8
- 241000196324 Embryophyta Species 0.000 claims description 6
- 108010010803 Gelatin Proteins 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000008273 gelatin Substances 0.000 claims description 6
- 229920000159 gelatin Polymers 0.000 claims description 6
- 235000019322 gelatine Nutrition 0.000 claims description 6
- 235000011852 gelatine desserts Nutrition 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 5
- 235000013339 cereals Nutrition 0.000 claims description 4
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 3
- 239000011402 Portland pozzolan cement Substances 0.000 claims description 3
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 3
- 241000209140 Triticum Species 0.000 claims description 3
- 235000021307 Triticum Nutrition 0.000 claims description 3
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 3
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 3
- 235000005822 corn Nutrition 0.000 claims description 3
- 239000010459 dolomite Substances 0.000 claims description 3
- 229910000514 dolomite Inorganic materials 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 150000002191 fatty alcohols Chemical class 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000001095 magnesium carbonate Substances 0.000 claims description 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 3
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 3
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 3
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 3
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- 239000010902 straw Substances 0.000 claims description 3
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 3
- 240000008042 Zea mays Species 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 10
- 239000011381 foam concrete Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004321 preservation Methods 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 241000209149 Zea Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004576 sand Substances 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/52—Sound-insulating materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring materials
- C04B2111/62—Self-levelling compositions
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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
Landscapes
- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a building formwork self-leveling recycled lightweight aggregate concrete and a preparation method thereof. The concrete comprises the following components in percentage by weight: 25-55% of a cementing material, 15-40% of a regenerated lightweight aggregate, 1-4% of vermiculite powder, 0.2-1.2% of a thixotropic lubricant, 0.05-0.5% of ecological fiber, 0.2-2% of a physical foaming agent, 0.05-0.2% of a foam stabilizer, 0.2-1.5% of a water reducing agent, 0.03-0.3% of an anti-segregation agent and 10-35% of water. The self-leveling recycled lightweight aggregate foam concrete provided by the invention has the characteristics of light weight, high strength, good fireproof, heat preservation and sound insulation effects, is self-leveling without segregation, reduces the construction amount, shortens the construction period, contains recycled lightweight aggregate prepared by recycling construction waste in the raw materials, reduces the cost, and greatly lightens the adverse effect of the construction waste on the environment.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a building formwork self-leveling recycled lightweight aggregate concrete and a preparation method thereof.
Background
Along with the development of the construction industry, a large amount of urban construction waste is generated all over the country every year, the classified collection degree of the construction waste is not high, most of the construction waste is mixed and collected, and the treatment and recycling of the construction waste are poor. The building formwork net wall is a novel building wall structure, the steel plate net used by the building formwork net wall is produced into pieces directly according to the height requirement of the wall in a factory, and concrete can be poured after on-site assembly, so that the building formwork net wall is widely applied to multi-storey and small high-rise buildings. After the wall body is poured with concrete, the steel plate net does not need to be dismantled and is abandoned in the wall body, so that a lot of workload is reduced, and meanwhile, the strength of the wall body is increased. At present, concrete poured in the building formwork is conventional self-leveling commercial concrete, is easy to separate, has poor field civilized construction, has large price rise of sand stones and cement in the market, is high in cost, is not beneficial to popularization of the building formwork structure, and has unsatisfactory heat preservation and sound insulation effects. Chinese patent 1624269a discloses a building formwork wall member, which comprises two formwork walls arranged face to face, and a hinged connecting member connecting the two formwork walls together at a certain distance and in a stacked manner, characterized in that: one template wall is a steel plate mesh, the other template wall is a light composite plate, the light composite plate is one of a calcium silicate plate, a fiber cement plate, a light lime plate and a fireproof plate, and the light composite plate has the advantages that the fireproof, heat preservation and sound insulation performance of the wall body is improved through the light composite plate; however, the construction amount of the light composite plate arranged outside the wall is large, and the overall performance of the wall is poor.
Disclosure of Invention
In order to solve the problems, the invention provides a self-leveling recycled lightweight aggregate concrete for a building formwork net and a preparation method thereof.
In order to realize the aim, the invention provides a self-leveling recycled lightweight aggregate concrete for a building formwork net, which comprises the following components in percentage by weight: 25-55% of a cementing material, 15-40% of a regenerated lightweight aggregate, 1-4% of vermiculite powder, 0.2-1.2% of a thixotropic lubricant, 0.05-0.5% of ecological fiber, 0.2-2% of a physical foaming agent, 0.05-0.2% of a foam stabilizer, 0.2-1.5% of a water reducing agent, 0.03-0.3% of an anti-segregation agent and 10-35% of water.
Preferably, the cementing material consists of 40-70% by mass of cement and 30-60% by mass of industrial waste residue micro powder; the cement is at least one of ordinary portland cement and pozzolan cement with the mark number of 42.5MPa or above; the industrial waste residue micro powder is at least one of blast furnace slag micro powder, coal gangue waste residue micro powder, iron tailing slag micro powder and lead-zinc tailing slag micro powder.
Preferably, the recycled lightweight aggregate is composed of coarse aggregate and fine aggregate, the volume percentage of the coarse aggregate in the recycled lightweight aggregate is 20-70%, and the volume percentage of the fine aggregate in the recycled lightweight aggregate is 30-80%; the coarse aggregate stacking bulk density screening range is 300-800 kg/m3The particle size is 3-8 mm; the fine aggregate stacking bulk density screening range is 50-350 kg/m3The grain diameter is 0.2 mm-3 mm; when the recycled lightweight aggregate is prepared: crushing and screening the light construction waste to obtain aggregates with the volume weight of not more than 800kg/m3, then screening coarse aggregates and fine aggregates with different particle sizes and volume weights, and uniformly mixing the coarse aggregates and the fine aggregates according to volume percentage to obtain the recycled light aggregates.
Preferably, the expanded vermiculite powder has a particle size of 0.1-0.6 mm and a density of 50-150 kg/m 3.
Preferably, the anti-segregation agent is prepared by compounding gelatin and mineral powder, the mass ratio of the gelatin to the mineral powder is (2-2.5): 1, and the mineral powder is at least one of dolomite powder and magnesite powder.
Preferably, the thixotropic lubricant is a powdery mixture obtained by mixing montmorillonite powder and talcum powder according to a mass ratio, wherein the montmorillonite powder: the ratio of the talcum powder to the talcum powder is 3:1, the particle size of the montmorillonite powder is 0.2-5 mu m, and the particle size of the talcum powder is 20-100 mu m.
Preferably, the physical foaming agent is at least one of a rosin thermopolymer and a polyethoxylated fatty alcohol.
Preferably, the foam stabilizer is fatty alcohol-polyoxyethylene ether sodium sulfate; the water reducing agent is a liquid aliphatic hydroxy sulfonate water reducing agent.
Preferably, the ecological fiber is prepared by crushing, drying and screening high-fiber plants, the length of the ecological fiber is 0.3-3 mm, and the density of the ecological fiber is 150-450 kg/m 3; the high fiber plant is at least one of straw stalk, wheat stalk, corn stalk, bark and tree trunk.
The invention also provides a preparation method of the building formwork self-leveling recycled lightweight aggregate concrete, which comprises the following specific steps: (1) weighing the following raw materials in parts by weight: 25-55% of a cementing material, 15-40% of a regenerated lightweight aggregate, 1-4% of vermiculite powder, 0.2-1.2% of a thixotropic lubricant, 0.05-0.5% of ecological fiber, 0.2-2% of a physical foaming agent, 0.05-0.2% of a foam stabilizer, 0.2-1.5% of a water reducing agent, 0.03-0.3% of an anti-segregation agent and 10-35% of water; (2) placing the weighed cementing material, the segregation resisting agent, the ecological fiber, the vermiculite powder and the thixotropic lubricant into a stirrer, stirring for 5-8 minutes, then sequentially adding the weighed water, the physical foaming agent, the foam stabilizer and the water reducing agent into the stirrer, and stirring for 4-8 minutes to obtain a slurry mixture; (3) and adding the weighed recycled lightweight aggregate into the slurry mixture in the stirrer, and stirring for 10-15 minutes to obtain the self-leveling recycled lightweight aggregate concrete.
The invention has the beneficial effects that:
(1) the self-leveling recycled light aggregate foam concrete has a uniform and porous structure, the cavities are fine and uniform and are not connected with each other, and the fireproof, sound insulation and heat insulation effects of the self-leveling recycled light aggregate foam concrete are better than those of an external heat insulation plate.
(2) The self-leveling regenerated light aggregate foam concrete contains ecological fibers, and the ecological fibers have good tensile deformation resistance and light specific gravity, so that the self-leveling regenerated light aggregate foam concrete is more flexible.
(3) The recycled light aggregate in the self-leveling recycled light aggregate foam concrete is supported by light construction waste, so that the self-leveling recycled light aggregate foam concrete is low in price and high in strength, and the adverse effect of the construction waste on the environment is greatly reduced.
(4) Thixotropic lubricant, anti-segregation agent, vermiculite powder and water reducing agent are added into the self-leveling recycled light aggregate foam concrete, so that the concrete has high fluidity, can be self-flowed and densely formed, ensures that the concrete does not segregate in the flowing and standing process, has high water retention property, ensures that the surface of the concrete does not bleed in the hardening process, does not shrink in the hardening process, and has micro-expansion performance.
Detailed Description
First, it should be noted that the features and advantages of the self-leveling recycled light aggregate foam concrete of the present invention, etc., will be specifically described below by way of example, however, all the descriptions are for illustrative purposes only and should not be construed as forming any limitation on the present invention.
In order to avoid repetition, the technical parameters of the related raw materials or the manufacturing method related in the embodiments are uniformly described, and are not described again in the embodiments:
the cementing material consists of cement and industrial waste residue micro powder, wherein the mass percent of the cement in the cementing material is 40-70%, and the mass percent of the industrial waste residue micro powder in the cementing material is 30-60%; the cement is at least one of ordinary portland cement and pozzolan cement with the mark number of 42.5MPa or above; the industrial waste residue micro powder is at least one of blast furnace slag micro powder, coal gangue waste residue micro powder, iron tailing slag micro powder and lead-zinc tailing slag micro powder.
The recycled light aggregate is composed of coarse aggregate and fine aggregate, the volume percentage of the coarse aggregate in the recycled light aggregate is 20-70%, and the volume percentage of the fine aggregate in the recycled light aggregate is 30-80%; the coarse aggregate stacking bulk density screening range is 300-800 kg/m3The particle size is 3-8 mm; the fine aggregate stacking bulk density screening range is 50-350 kg/m3The grain diameter is 0.2 mm-3 mm; when the recycled lightweight aggregate is prepared: crushing and screening the light construction waste to obtain aggregates with the volume weight of not more than 800kg/m3, then screening coarse aggregates and fine aggregates with different particle sizes and volume weights, and uniformly mixing the coarse aggregates and the fine aggregates according to volume percentage to obtain the recycled light aggregates.
The expanded vermiculite powder has a particle size of 0.1-0.6 mm and a density of 50-150 kg/m 3.
The anti-segregation agent is prepared by compounding gelatin and mineral powder, the mass ratio of the gelatin to the mineral powder is (2-2.5): 1, and the mineral powder is at least one of dolomite powder and magnesite powder.
The thixotropic lubricant is a powdery mixture obtained by mixing montmorillonite powder and talcum powder according to a mass ratio, wherein the montmorillonite powder comprises the following components in parts by mass: the ratio of the talcum powder to the talcum powder is 3:1, the particle size of the montmorillonite powder is 0.2-5 mu m, and the particle size of the talcum powder is 20-100 mu m.
The physical foaming agent is at least one of rosin thermopolymer and polyethoxylated fatty alcohol.
The foam stabilizer is fatty alcohol-polyoxyethylene ether sodium sulfate; the water reducing agent is a liquid aliphatic hydroxy sulfonate water reducing agent.
The ecological fiber is prepared by crushing, drying and screening high-fiber plants, the length is 0.3-3 mm, and the density is 150-450 kg/m 3; the high fiber plant is at least one of straw stalk, wheat stalk, corn stalk, bark and tree trunk.
Example 1
The self-leveling recycled lightweight aggregate concrete for the building formwork network comprises the following components in percentage by weight: 43% of cementing material, 30% of recycled lightweight aggregate, 1.5% of vermiculite powder, 0.5% of thixotropic lubricant, 0.1% of ecological fiber, 1% of physical foaming agent, 0.1% of foam stabilizer, 0.6% of water reducing agent, 0.2% of anti-segregation agent and 23% of water.
The preparation method of the building formwork self-leveling recycled lightweight aggregate concrete comprises the following steps: (1) weighing the raw materials according to the weight proportion; (2) placing the weighed cementing material, the segregation resisting agent, the ecological fiber, the vermiculite powder and the thixotropic lubricant into a stirrer, stirring for 5-8 minutes, then sequentially adding the weighed water, the physical foaming agent, the foam stabilizer and the water reducing agent into the stirrer, and stirring for 4-8 minutes to obtain a slurry mixture; (3) and adding the weighed recycled lightweight aggregate into the slurry mixture in the stirrer, and stirring for 10-15 minutes to obtain the self-leveling recycled lightweight aggregate concrete.
The surface density of the self-leveling recycled lightweight aggregate concrete of the building formwork mesh is 900kg/m2The slump expansion is 745mm, the 28-day compressive strength is 11.6MPa, the thermal conductivity is 0.018 w/(m.k), the fire endurance is 4h, and the sound insulation capacity is 54 dB.
Example 2
The self-leveling recycled lightweight aggregate concrete for the building formwork network comprises the following components in percentage by weight: 50% of a cementing material, 30% of a recycled light aggregate, 2.5% of vermiculite powder, 0.8% of a thixotropic lubricant, 0.4% of ecological fiber, 1.2% of a physical foaming agent, 0.12% of a foam stabilizer, 0.8% of a water reducing agent, 0.18% of an anti-segregation agent and 14% of water.
The preparation method of the building formwork self-leveling recycled lightweight aggregate concrete comprises the following steps: (1) weighing the raw materials according to the weight proportion; (2) placing the weighed cementing material, the segregation resisting agent, the ecological fiber, the vermiculite powder and the thixotropic lubricant into a stirrer, stirring for 5-8 minutes, then sequentially adding the weighed water, the physical foaming agent, the foam stabilizer and the water reducing agent into the stirrer, and stirring for 4-8 minutes to obtain a slurry mixture; (3) and adding the weighed recycled lightweight aggregate into the slurry mixture in the stirrer, and stirring for 10-15 minutes to obtain the self-leveling recycled lightweight aggregate concrete.
The surface density of the self-leveling recycled lightweight aggregate concrete of the building formwork mesh is 950kg/m2, the slump expansion degree is 790mm, the 28-day compressive strength is 12MPa, the heat conductivity coefficient is 0.028 w/(m.k), the fire resistance is 4h, and the sound insulation capacity is 51 dB.
Example 3
The self-leveling recycled lightweight aggregate concrete for the building formwork network comprises the following components in percentage by weight: 40% of cementing material, 35% of recycled light aggregate, 2.5% of vermiculite powder, 0.7% of thixotropic lubricant, 0.2% of ecological fiber, 1.8% of physical foaming agent, 0.15% of foam stabilizer, 0.4% of water reducing agent, 0.25% of anti-segregation agent and 19% of water.
The preparation method of the building formwork self-leveling recycled lightweight aggregate concrete comprises the following steps: (1) weighing the raw materials according to the weight proportion; (2) placing the weighed cementing material, the segregation resisting agent, the ecological fiber, the vermiculite powder and the thixotropic lubricant into a stirrer, stirring for 5-8 minutes, then sequentially adding the weighed water, the physical foaming agent, the foam stabilizer and the water reducing agent into the stirrer, and stirring for 4-8 minutes to obtain a slurry mixture; (3) and adding the weighed recycled lightweight aggregate into the slurry mixture in the stirrer, and stirring for 10-15 minutes to obtain the self-leveling recycled lightweight aggregate concrete.
The area density of the self-leveling recycled lightweight aggregate concrete of the building formwork net is 800kg/m2, the slump expansion degree is 775mm, the 28-day compressive strength is 10.5MPa, the thermal conductivity is 0.012 w/(m.k), the fire resistance is 4h, and the sound insulation capacity is 56 dB.
Embodiments 1 to 3 show that the self-leveling recycled lightweight aggregate concrete for the building formwork has good fireproof, sound insulation and heat preservation effects, and has the characteristics of good cohesiveness, high strength and the like.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. The self-leveling recycled lightweight aggregate concrete for the building formwork is characterized by comprising the following components in percentage by weight: 25-55% of a cementing material, 15-40% of a regenerated lightweight aggregate, 1-4% of vermiculite powder, 0.2-1.2% of a thixotropic lubricant, 0.05-0.5% of ecological fiber, 0.2-2% of a physical foaming agent, 0.05-0.2% of a foam stabilizer, 0.2-1.5% of a water reducing agent, 0.03-0.3% of an anti-segregation agent and 10-35% of water;
the cementing material consists of cement and industrial waste residue micro powder, wherein the mass percent of the cement in the cementing material is 40-70%, and the mass percent of the industrial waste residue micro powder in the cementing material is 30-60%; the cement is at least one of ordinary portland cement and pozzolan cement with the mark number of 42.5MPa or above; the industrial waste residue micro powder is at least one of blast furnace slag micro powder, coal gangue waste residue micro powder, iron tailing slag micro powder and lead-zinc tailing slag micro powder;
the recycled light aggregate is composed of coarse aggregate and fine aggregate, the volume percentage of the coarse aggregate in the recycled light aggregate is 20-70%, and the volume percentage of the fine aggregate in the recycled light aggregate is 30-80%; the coarse aggregate stacking bulk density screening range is 300-800 kg/m3The grain diameter is 3 mm-8 mm; the fine aggregate stacking bulk density screening range is 50-350 kg/m3The grain diameter is 0.2 mm-3 mm; the recycled light aggregate is prepared by crushing and screening light construction waste, and the volume weight of the crushed and screened light construction waste is not more than 800kg/m3Then screening coarse aggregate and fine aggregate with different particle sizes and volume weights, and uniformly mixing the coarse aggregate and the fine aggregate according to volume percentage to obtain recycled light aggregate;
the particle size of the vermiculite powder is 0.1-0.6 mm, and the density is 50-150 kg/m3；
The anti-segregation agent is prepared by compounding gelatin and mineral powder, the mass ratio of the gelatin to the mineral powder is (2-2.5): 1, and the mineral powder is at least one of dolomite powder and magnesite powder;
the thixotropic lubricant is a powdery mixture obtained by mixing montmorillonite powder and talcum powder according to a mass ratio, wherein the montmorillonite powder comprises the following components in parts by mass: the particle size of the montmorillonite powder is 0.2-5 mu m, and the particle size of the talcum powder is 20-100 mu m;
the physical foaming agent is at least one of rosin thermopolymer and polyethoxylated fatty alcohol;
the foam stabilizer is fatty alcohol-polyoxyethylene ether sodium sulfate; the water reducing agent is a liquid aliphatic hydroxy sulfonate water reducing agent;
the ecological fiber is prepared by crushing, drying and screening high-fiber plants, the length of the ecological fiber is 0.3-3 mm, and the density of the ecological fiber is 150-450 kg/m3(ii) a The high fiber plant is at least one of straw stalk, wheat stalk, corn stalk, bark and tree trunk.
2. The preparation method of the building formwork self-leveling recycled lightweight aggregate concrete according to claim 1 comprises the following specific steps: (1) weighing the following raw materials in parts by weight: 25-55% of a cementing material, 15-40% of a regenerated lightweight aggregate, 1-4% of vermiculite powder, 0.2-1.2% of a thixotropic lubricant, 0.05-0.5% of ecological fiber, 0.2-2% of a physical foaming agent, 0.05-0.2% of a foam stabilizer, 0.2-1.5% of a water reducing agent, 0.03-0.3% of an anti-segregation agent and 10-35% of water; (2) placing the weighed cementing material, the segregation resisting agent, the ecological fiber, the vermiculite powder and the thixotropic lubricant into a stirrer, stirring for 5-8 minutes, then sequentially adding the weighed water, the physical foaming agent, the foam stabilizer and the water reducing agent into the stirrer, and stirring for 4-8 minutes to obtain a slurry mixture; (3) and adding the weighed recycled lightweight aggregate into the slurry mixture in the stirrer, and stirring for 10-15 minutes to obtain the self-leveling recycled lightweight aggregate concrete.
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| CN106278377A (en) * | 2016-08-15 | 2017-01-04 | 马鞍山十七冶工程科技有限责任公司 | A kind of full regeneration lightweight aggregate concrete self-insulating light wallboard and preparation method |
| CN106278036A (en) * | 2016-08-12 | 2017-01-04 | 马鞍山十七冶工程科技有限责任公司 | A kind of High-strength self-compaction concrete and preparation method |
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| CN106278036A (en) * | 2016-08-12 | 2017-01-04 | 马鞍山十七冶工程科技有限责任公司 | A kind of High-strength self-compaction concrete and preparation method |
| CN106278377A (en) * | 2016-08-15 | 2017-01-04 | 马鞍山十七冶工程科技有限责任公司 | A kind of full regeneration lightweight aggregate concrete self-insulating light wallboard and preparation method |
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