CN109320189A - A kind of foamed concrete and preparation method thereof - Google Patents
A kind of foamed concrete and preparation method thereof Download PDFInfo
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- CN109320189A CN109320189A CN201811398273.0A CN201811398273A CN109320189A CN 109320189 A CN109320189 A CN 109320189A CN 201811398273 A CN201811398273 A CN 201811398273A CN 109320189 A CN109320189 A CN 109320189A
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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
- C04B28/24—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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
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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
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
A kind of foamed concrete and preparation method thereof, is related to technical field of concrete, solves the problems, such as that the generally existing intensity of the foamed concrete of prior art preparation is low, easy to crack.Wherein, foamed concrete includes following raw material by weight: 100-130 parts of cementitious material, strengthening filler 42-58 parts, 1-3 parts of foaming agent, 69-110 parts of water, 1-2 parts of water-reducing agent；The cementitious material includes cement, flyash, slag, leca and potassium water glass；The filler of strengthening includes the fibrous material that length is 4-10mm；The foaming agent includes Sodium Caseinate and lauryl sodium sulfate, and the mass ratio of the two is 2:3-4；The water-reducing agent is the polycarboxylate water-reducer that concentration is 0.1-0.18%.Preparation method of the present invention is simple, easy to accomplish；Each prescription proportion of reasonably optimizing during the preparation process, obtained foamed concrete has excellent compression strength and stability, while high-strength light, application field are extensive.
Description
Technical field
It is especially a kind of foamed concrete and preparation method thereof the present invention relates to technical field of concrete.
Background technique
Foamed concrete has the characteristics that lightweight outstanding as a kind of novel energy-saving construction material, first it, in non-bearing
The self weight of building can be substantially reduced when using in structure；Followed by porous feature, a large amount of independent envelopes in foamed concrete
The micropore closed exists, and makes it have the excellent performances such as good heat preservation, heat-insulated, sound insulation.
Foamed concrete product has the good market demand, at present in domestic big or middle city frame structure building, has
Considerable part building uses the direct cast-in-site of foamed concrete, and cost is relatively low, and effect is good, has price advantage, in addition national
Industrial policy adjustment, foamed concrete product application are more and more extensive.Foamed concrete is the foaming by foaming machine, and will bubble
Foam is uniformly mixed with cement slurry, is then formed by cast-in-place construction or mold, is formed by through natural curing a kind of containing a large amount of
The new lightweight material of sealed porosity.But the problems such as generally existing intensity of foamed concrete is low, easy to crack seriously restricts its popularization
With application.
Summary of the invention
Technical problem to be solved by the present invention lies in the generally existing intensity of the foamed concrete of prior art preparation is low, easy
The problem of cracking.
The present invention solves above-mentioned technical problem by the following technical programs:
A kind of foamed concrete, including following raw material by weight:
100-130 parts of cementitious material, strengthen filler 42-58 parts, 1-3 parts of foaming agent, 69-110 parts of water, 1-2 parts of water-reducing agent；
The cementitious material includes cement, flyash, slag, leca and potassium water glass, and the cement is intensity etc.
Grade is not less than 42.5 grades of ordinary portland cement, and the flyash is II grades or more flyash, and the leca is by partial size
Range is that the leca of two kinds of partial sizes of 20-30mm and 5-15mm matches composition according to 3-4:2, and the potassium water glass modulus is
2.7-2.9；
The filler of strengthening includes the fibrous material that length is 4-10mm；
The foaming agent includes Sodium Caseinate and lauryl sodium sulfate, and the mass ratio of the two is 2:3-4；
The water-reducing agent is the polycarboxylate water-reducer that concentration is 0.1-0.18%.
A kind of foamed concrete of the present invention, wherein in the cementitious material, cement, flyash, slag and clay
The mass ratio of haydite is 3:1:2:1, and the mass ratio of the potassium water glass and cement is 1:40-60.
A kind of foamed concrete of the present invention, wherein the reinforcing filler further includes montmorillonite and kaolinite, described
The partial size of montmorillonite is 20-100 μm, and kaolinic partial size is 200-400 μm；The fibrous material, montmorillonite and kaolinic
Mass ratio is 1-2:2-3:2-6.
A kind of foamed concrete of the present invention, wherein the specific surface area of the slag is greater than 4300cm2/g。
A kind of foamed concrete of the present invention, wherein the fibrous material is steel fibre, polyphenyl fiber, aluminium carbonate
The combination of one or more of ammonium fiber, polypropylene fibre and ceramic fibre.
A kind of foamed concrete of the present invention, wherein it further include boric acid in the raw material of the foamed concrete, it is described
Boric acid quality is the 0.2-0.5% of the quality of the cement.
A kind of foamed concrete of the present invention, wherein the boric acid dosage works as environment temperature with variation of ambient temperature
At respectively 5-20 DEG C and >=20 DEG C, the dosage of boric acid is respectively the 0.2-0.4% and 0.4-0.5% of cement quality.
A kind of foamed concrete of the present invention, wherein the boric acid dosage works as environment temperature with variation of ambient temperature
At respectively 5-20 DEG C and >=20 DEG C, the dosage of boric acid is respectively the 0.3% and 0.47% of cement quality.
The present invention also provides a kind of preparation methods of foamed concrete, comprising the following steps:
(1) it stocks up: getting cementitious material ready according to required parts by weight, strengthens filler, foaming agent, water and water-reducing agent；
(2) it prepares cement slurry: cementitious material and reinforcing filler powder being poured into blender and stirred evenly, is mixed
Water-reducing agent is added to the water and stirs evenly by powder, obtains mixed liquor, then be in by stirring evenly in mixed powder addition mixed liquor
Fluidised form slurry；
(3) it prepares foam: foaming agent and water being mixed in 1:40-50 ratio and are added in compression foaming machine, partial size, which is made, is
500-1000 μm of foam；
(4) cement slurry and foams mix: the water that will be prepared in the slow steps for importing of foam (2) prepared in step (3)
In material-mud, the two is uniformly mixed, mixing speed 10-20r/min, mixing time 2-5min；
(5) mixture of cement slurry and foam that step (4) obtains is poured into mold, is covered with preservative film, supported
Demoulding is after shield 2-5 days to get to prepared foamed concrete.
A kind of preparation method of foamed concrete of the present invention, wherein in the step (2), cementitious material and strong
The mixing speed for changing filler powder is 100-150r/min, mixing time 6-10min；Mixed powder is added in side in the mixed liquor
Expect side stirring, mixing speed 50-70r/min, mixing time 10-20min.
Compared with prior art, the present invention have it is following the utility model has the advantages that
(1) II grades or more flyash and potassium water glass are used in mixed way by cementitious material of the present invention, and potassium water glass can improve powder
The hydrophobicity of glass microballoon in coal ash improves its impervious water resistance and intensity.Glass microballoon contains in II grades or more flyash simultaneously
Amount is higher, can effectively improve mobility, make foamed concrete internal structure even tissue, avoid being formed under stress and split
Line significantly improves compressive property.
(2) it is used cooperatively the leca of different-grain diameter, every raw material in cementitious material is made to form granular-grade between multi-region
With relationship, slurry compactness is effectively improved, to improve the intensity and volume stability of foamed concrete, reduces foamed concrete
Early-age shrinkage cracking.
(3) the Sodium Caseinate junket used in foaming agent has both foaming and foam stability energy, and the foam of solution is fine and smooth, foam stabilizing energy
Power is strong, and lauryl sodium sulfate, which is used in mixed way, has synergistic effect well, can be effectively improved foam and concrete simultaneously
The interaction of grain, coefficient of foaming is high, foam stability is excellent, good with general-purpose cement slurry compatibility；The foaming of preparation is mixed
Solidifying soil touches phenomenon, early strength promotion fastly without collapsing.
(4) length is added is 4-10mm fiber, and the long-chain of these fiber molecules is intertwined, and is cross-linked to each other into network knot
Structure can freeze solidly on this cross-linked network structure wherein so that foamed concrete is after solidification, reach on the whole tight
Gu the fiber of this crosslinking net can play the role of after expanding, enhancing, resistance is split and toughening, prevents stress from concentrating, and reduces
A possibility that drying shrinkage and cracking of foamed concrete, reduces crackle.
(5) boric acid can delay cement setting as retarder, ensure that the workability of foamed concrete；According to environment
The amount ranges of Temperature Matching boric acid, the accurate setting time for controlling concrete, the inside concrete even tissue made, tool
Standby good strength and stability.
(6) preparation method of the present invention is simple, easy to accomplish；Each prescription proportion of reasonably optimizing during the preparation process, it is obtained
Foamed concrete has excellent compression strength and stability, while high-strength light, application field are extensive.
Specific embodiment
Below with reference to embodiment, invention is further described in detail.
Embodiment 1
A kind of foamed concrete, including following raw material by weight:
100 parts of cementitious material, strengthen 42 parts of filler, 1 part of foaming agent, 69 parts of water, 1 part of water-reducing agent；
The cementitious material includes cement, flyash, slag, leca and potassium water glass, as further preferred
Technical solution, cement, flyash, slag and leca mass ratio be 3:1:2:1, the matter of the potassium water glass and cement
Amount is than being 1:40.
The cement is the ordinary portland cement that strength grade is not less than 42.5 grades, and the flyash is II grades or more powder
Coal ash, the leca are made of the leca for two kinds of partial sizes that particle size range is 20mm and 5mm according to 3:2 proportion, institute
Stating potassium water glass modulus is 2.7；As further preferred technical solution, the specific surface area of the slag is greater than 4100cm2/g。
The filler of strengthening includes the fibrous material that length is 4mm；As further preferred technical solution, the fiber
Material is the combination in steel fibre, polyphenyl fiber, aluminium carbonate ammonium fiber, polypropylene fibre and ceramic fibre.As further excellent
The technical solution of choosing, strengthening filler further includes montmorillonite and kaolinite, and the partial size of the montmorillonite is 20 μm, kaolinic partial size
It is 200 μm；The fibrous material, montmorillonite and kaolinic mass ratio are 1:2:2.
The foaming agent includes Sodium Caseinate and lauryl sodium sulfate, and the mass ratio of the two is 2:3；
The water-reducing agent is the polycarboxylate water-reducer that concentration is 0.1%.
It further include boric acid in the raw material of the foamed concrete as further preferred technical solution, the boric acid matter
Amount is the 0.2-0.5% of the quality of the cement.
As further preferred technical solution, the boric acid dosage is with variation of ambient temperature, when environment temperature is respectively
At 5-20 DEG C and >=20 DEG C, the dosage of boric acid is respectively the 0.2% and 0.4% of cement quality.
A kind of preparation method of foamed concrete, comprising the following steps:
(1) it stocks up: getting cementitious material ready according to required parts by weight, strengthens filler, foaming agent, water and water-reducing agent；
(2) it prepares cement slurry: cementitious material and reinforcing filler powder being poured into blender and stirred evenly, is mixed
Water-reducing agent is added to the water and stirs evenly by powder, obtains mixed liquor, then be in by stirring evenly in mixed powder addition mixed liquor
Fluidised form slurry；As further preferred technical solution, cementitious material and the mixing speed for strengthening filler powder are 100r/min, are stirred
Mixing the time is 10min；It is stirred in the mixed liquor when mixed powder is added, mixing speed 50r/min, mixing time is
20min；
(3) it prepares foam: foaming agent and water being mixed in 1:40 ratio and are added in compression foaming machine, it is 500 μ that partial size, which is made,
The foam of m；
(4) cement slurry and foams mix: the water that will be prepared in the slow steps for importing of foam (2) prepared in step (3)
In material-mud, the two is uniformly mixed, mixing speed 10r/min, mixing time 5min；
(5) mixture of cement slurry and foam that step (4) obtains is poured into mold, is covered with preservative film, supported
Shield 2 days after demoulding to get arrive prepared foamed concrete.
Embodiment 2
A kind of foamed concrete, including following raw material by weight:
130 parts of cementitious material, strengthen 58 parts of filler, 3 parts of foaming agent, 110 parts of water, 2 parts of water-reducing agent；
The cementitious material includes cement, flyash, slag, leca and potassium water glass, as further preferred
Technical solution, cement, flyash, slag and leca mass ratio be 3:1:2:1, the matter of the potassium water glass and cement
Amount is than being 1:60.
The cement is the ordinary portland cement that strength grade is not less than 42.5 grades, and the flyash is II grades or more powder
Coal ash, the leca are made of the leca for two kinds of partial sizes that particle size range is 30mm and 15mm according to 2:1 proportion, institute
Stating potassium water glass modulus is 2.9；As further preferred technical solution, the specific surface area of the slag is greater than 4500cm2/g。
The filler of strengthening includes the fibrous material that length is 10mm；As further preferred technical solution, the fibre
Dimension material is the combination of steel fibre, polyphenyl fiber, aluminium carbonate ammonium fiber and ceramic fibre.As further preferred technical side
Case, strengthening filler further includes montmorillonite and kaolinite, and the partial size of the montmorillonite is 100 μm, and kaolinic partial size is 400 μm；
The fibrous material, montmorillonite and kaolinic mass ratio are 2:3:6.
The foaming agent includes Sodium Caseinate and lauryl sodium sulfate, and the mass ratio of the two is 1:2；
The water-reducing agent is the polycarboxylate water-reducer that concentration is 0.18%.
It further include boric acid in the raw material of the foamed concrete as further preferred technical solution, the boric acid matter
Amount is the 0.5% of the quality of the cement.
As further preferred technical solution, the boric acid dosage is with variation of ambient temperature, when environment temperature is respectively
At 5-20 DEG C and >=20 DEG C, the dosage of boric acid is respectively the 0.4% and 0.5% of cement quality.
A kind of preparation method of foamed concrete, comprising the following steps:
(1) it stocks up: getting cementitious material ready according to required parts by weight, strengthens filler, foaming agent, water and water-reducing agent；
(2) it prepares cement slurry: cementitious material and reinforcing filler powder being poured into blender and stirred evenly, is mixed
Water-reducing agent is added to the water and stirs evenly by powder, obtains mixed liquor, then be in by stirring evenly in mixed powder addition mixed liquor
Fluidised form slurry；As further preferred technical solution, cementitious material and the mixing speed for strengthening filler powder are 150r/min, are stirred
Mixing the time is 6min；It is stirred in the mixed liquor when mixed powder is added, mixing speed 70r/min, mixing time is
10min；
(3) it prepares foam: foaming agent and water being mixed in 1:50 ratio and are added in compression foaming machine, it is 1000 that partial size, which is made,
μm foam；
(4) cement slurry and foams mix: the water that will be prepared in the slow steps for importing of foam (2) prepared in step (3)
In material-mud, the two is uniformly mixed, mixing speed 20r/min, mixing time 2min；
(5) mixture of cement slurry and foam that step (4) obtains is poured into mold, is covered with preservative film, supported
Shield 5 days after demoulding to get arrive prepared foamed concrete.
Embodiment 3
A kind of foamed concrete, including following raw material by weight:
115 parts of cementitious material, strengthen 52 parts of filler, 2 parts of foaming agent, 80 parts of water, 1.5 parts of water-reducing agent；
The cementitious material includes cement, flyash, slag, leca and potassium water glass, as further preferred
Technical solution, cement, flyash, slag and leca mass ratio be 3:1:2:1, the matter of the potassium water glass and cement
Amount is than being 1:50.
The cement is the ordinary portland cement that strength grade is not less than 42.5 grades, and the flyash is II grades or more powder
Coal ash, the leca are made of the leca for two kinds of partial sizes that particle size range is 25mm and 10mm according to 3:2 proportion, institute
Stating potassium water glass modulus is 2.8；As further preferred technical solution, the specific surface area of the slag is greater than 4300cm2/g。
The filler of strengthening includes the fibrous material that length is 7mm；As further preferred technical solution, the fiber
Material is steel fibre, ceramic fibre.As further preferred technical solution, strengthening filler further includes montmorillonite and kaolinite,
The partial size of the montmorillonite is 60 μm, and kaolinic partial size is 300 μm；The fibrous material, montmorillonite and kaolinic quality
Ratio is 1:3:4.
The foaming agent includes Sodium Caseinate and lauryl sodium sulfate, and the mass ratio of the two is 2:3；
The water-reducing agent is the polycarboxylate water-reducer that concentration is 0.15%.
It further include boric acid in the raw material of the foamed concrete as further preferred technical solution, the boric acid matter
Amount is the 0.3% of the quality of the cement.
As further preferred technical solution, the boric acid dosage is with variation of ambient temperature, when environment temperature is respectively
At 5-20 DEG C and >=20 DEG C, the dosage of boric acid is respectively the 0.3% and 0.47% of cement quality.
A kind of preparation method of foamed concrete, comprising the following steps:
(1) it stocks up: getting cementitious material ready according to required parts by weight, strengthens filler, foaming agent, water and water-reducing agent；
(2) it prepares cement slurry: cementitious material and reinforcing filler powder being poured into blender and stirred evenly, is mixed
Water-reducing agent is added to the water and stirs evenly by powder, obtains mixed liquor, then be in by stirring evenly in mixed powder addition mixed liquor
Fluidised form slurry；As further preferred technical solution, cementitious material and the mixing speed for strengthening filler powder are 130r/min, are stirred
Mixing the time is 8min；It is stirred in the mixed liquor when mixed powder is added, mixing speed 60r/min, mixing time is
15min；
(3) it prepares foam: foaming agent and water being mixed in 1:45 ratio and are added in compression foaming machine, it is 750 μ that partial size, which is made,
The foam of m；
(4) cement slurry and foams mix: the water that will be prepared in the slow steps for importing of foam (2) prepared in step (3)
In material-mud, the two is uniformly mixed, mixing speed 15r/min, mixing time 3min；
(5) mixture of cement slurry and foam that step (4) obtains is poured into mold, is covered with preservative film, supported
Shield 4 days after demoulding to get arrive prepared foamed concrete.
Embodiment 4
A kind of foamed concrete, including following raw material by weight:
110 parts of cementitious material, strengthen 50 parts of filler, 1 part of foaming agent, 83 parts of water, 1 part of water-reducing agent；
The cementitious material includes cement, flyash, slag, leca and potassium water glass, as further preferred
Technical solution, cement, flyash, slag and leca mass ratio be 3:1:2:1, the matter of the potassium water glass and cement
Amount is than being 1:46.
The cement is the ordinary portland cement that strength grade is not less than 42.5 grades, and the flyash is II grades or more powder
Coal ash, the leca are made of the leca for two kinds of partial sizes that particle size range is 23mm and 8mm according to 3:2 proportion, institute
Stating potassium water glass modulus is 2.7；As further preferred technical solution, the specific surface area of the slag is greater than 4200cm2/g。
The filler of strengthening includes the fibrous material that length is 6mm；As further preferred technical solution, the fiber
Material is the combination of steel fibre, polyphenyl fiber and aluminium carbonate ammonium fiber.As further preferred technical solution, strengthen filler also
Including montmorillonite and kaolinite, the partial size of the montmorillonite is 42 μm, and kaolinic partial size is 230 μm；The fibrous material, illiteracy
De- stone and kaolinic mass ratio are 1:1:3.
The foaming agent includes Sodium Caseinate and lauryl sodium sulfate, and the mass ratio of the two is 2:3；
The water-reducing agent is the polycarboxylate water-reducer that concentration is 0.12%.
It further include boric acid in the raw material of the foamed concrete as further preferred technical solution, the boric acid matter
Amount is the 0.3% of the quality of the cement.
As further preferred technical solution, the boric acid dosage is with variation of ambient temperature, when environment temperature is respectively
At 5-20 DEG C and >=20 DEG C, the dosage of boric acid is respectively the 0.25% and 0.43% of cement quality.
A kind of preparation method of foamed concrete, comprising the following steps:
(1) it stocks up: getting cementitious material ready according to required parts by weight, strengthens filler, foaming agent, water and water-reducing agent；
(2) it prepares cement slurry: cementitious material and reinforcing filler powder being poured into blender and stirred evenly, is mixed
Water-reducing agent is added to the water and stirs evenly by powder, obtains mixed liquor, then be in by stirring evenly in mixed powder addition mixed liquor
Fluidised form slurry；As further preferred technical solution, cementitious material and the mixing speed for strengthening filler powder are 115r/min, are stirred
Mixing the time is 7min；It is stirred in the mixed liquor when mixed powder is added, mixing speed 55r/min, mixing time is
12min；
(3) it prepares foam: foaming agent and water being mixed in 1:43 ratio and are added in compression foaming machine, it is 600 μ that partial size, which is made,
The foam of m；
(4) cement slurry and foams mix: the water that will be prepared in the slow steps for importing of foam (2) prepared in step (3)
In material-mud, the two is uniformly mixed, mixing speed 12r/min, mixing time 3min；
(5) mixture of cement slurry and foam that step (4) obtains is poured into mold, is covered with preservative film, supported
Shield 3 days after demoulding to get arrive prepared foamed concrete.
Embodiment 5
A kind of foamed concrete, including following raw material by weight:
124 parts of cementitious material, strengthen 26 parts of filler, 2.6 parts of foaming agent, 98 parts of water, 2 parts of water-reducing agent；
The cementitious material includes cement, flyash, slag, leca and potassium water glass, as further preferred
Technical solution, cement, flyash, slag and leca mass ratio be 3:1:2:1, the matter of the potassium water glass and cement
Amount is than being 1:57.
The cement is the ordinary portland cement that strength grade is not less than 42.5 grades, and the flyash is II grades or more powder
Coal ash, the leca are made of the leca for two kinds of partial sizes that particle size range is 27mm and 12mm according to 2:1 proportion, institute
Stating potassium water glass modulus is 2.9；As further preferred technical solution, the specific surface area of the slag is greater than 4550cm2/g。
The filler of strengthening includes the fibrous material that length is 9mm；As further preferred technical solution, the fiber
Material is steel fibre, polypropylene fibre.As further preferred technical solution, strengthening filler further includes montmorillonite and kaolinite
Stone, the partial size of the montmorillonite are 86 μm, and kaolinic partial size is 360 μm；The fibrous material, montmorillonite and kaolinic matter
Amount ratio is 1:3:5.
The foaming agent includes Sodium Caseinate and lauryl sodium sulfate, and the mass ratio of the two is 2:4；
The water-reducing agent is the polycarboxylate water-reducer that concentration is 0.16%.
It further include boric acid in the raw material of the foamed concrete as further preferred technical solution, the boric acid matter
Amount is the 0.4% of the quality of the cement.
As further preferred technical solution, the boric acid dosage is with variation of ambient temperature, when environment temperature is respectively
At 5-20 DEG C and >=20 DEG C, the dosage of boric acid is respectively the 0.34% and 0.48% of cement quality.
A kind of preparation method of foamed concrete the following steps are included:
(1) it stocks up: getting cementitious material ready according to required parts by weight, strengthens filler, foaming agent, water and water-reducing agent；
(2) it prepares cement slurry: cementitious material and reinforcing filler powder being poured into blender and stirred evenly, is mixed
Water-reducing agent is added to the water and stirs evenly by powder, obtains mixed liquor, then be in by stirring evenly in mixed powder addition mixed liquor
Fluidised form slurry；As further preferred technical solution, cementitious material and the mixing speed for strengthening filler powder are 142r/min, are stirred
Mixing the time is 9min；It is stirred in the mixed liquor when mixed powder is added, mixing speed 67r/min, mixing time is
18min；
(3) it prepares foam: foaming agent and water being mixed in 1:40-50 ratio and are added in compression foaming machine, partial size, which is made, is
900 μm of foam；
(4) cement slurry and foams mix: the water that will be prepared in the slow steps for importing of foam (2) prepared in step (3)
In material-mud, the two is uniformly mixed, mixing speed 17r/min, mixing time 3min；
(5) mixture of cement slurry and foam that step (4) obtains is poured into mold, is covered with preservative film, supported
Shield 4 days after demoulding to get arrive prepared foamed concrete.
Performance evaluation is carried out to foamed concrete obtained in above-described embodiment 1-5, the results are shown in Table 1:
Table 1
As can be seen from the above table, the average dry density≤567kg/m for the foamed concrete that embodiment 1-5 is provided3, 7 days anti-
Compressive Strength >=3.3MPa, 28 days compression strength >=5.7MPa, linear shrinkage ratio≤0.19%, resistance to compression, in terms of have
Good performance.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although referring to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features.It is all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of foamed concrete, which is characterized in that including following raw material by weight:
100-130 parts of cementitious material, strengthen filler 42-58 parts, 1-3 parts of foaming agent, 69-110 parts of water, 1-2 parts of water-reducing agent；
The cementitious material includes cement, flyash, slag, leca and potassium water glass, the cement be strength grade not
Ordinary portland cement less than 42.5 grades, the flyash are II grades or more flyash, and the leca is by particle size range
Leca for two kinds of partial sizes of 20-30mm and 5-15mm matches composition according to 3-4:2, and the potassium water glass modulus is 2.7-
2.9；
The filler of strengthening includes the fibrous material that length is 4-10mm；
The foaming agent includes Sodium Caseinate and lauryl sodium sulfate, and the mass ratio of the two is 2:3-4；
The water-reducing agent is the polycarboxylate water-reducer that concentration is 0.1-0.18%.
2. a kind of foamed concrete according to claim 1, it is characterised in that: in the cementitious material, cement, fine coal
Ash, slag and leca mass ratio be 3:1:2:1, the mass ratio of the potassium water glass and cement is 1:40-60.
3. a kind of foamed concrete according to claim 1, it is characterised in that: the reinforcing filler further include montmorillonite and
Kaolinite, the partial size of the montmorillonite are 20-100 μm, and kaolinic partial size is 200-400 μm；The fibrous material, montmorillonite
It is 1-2:2-3:2-6 with kaolinic mass ratio.
4. a kind of foamed concrete according to claim 1, it is characterised in that: the specific surface area of the slag is greater than
4300cm2/g。
5. a kind of foamed concrete according to claim 1, it is characterised in that: the fibrous material is steel fibre, polyphenyl
The combination of one or more of fiber, aluminium carbonate ammonium fiber, polypropylene fibre and ceramic fibre.
6. a kind of foamed concrete according to claim 1, it is characterised in that: also wrapped in the raw material of the foamed concrete
Boric acid is included, the boric acid quality is the 0.2-0.5% of the quality of the cement.
7. a kind of foamed concrete according to claim 6, it is characterised in that: the boric acid dosage becomes with environment temperature
Change, when environment temperature is respectively 5-20 DEG C and >=20 DEG C, the dosage of boric acid is respectively the 0.2-0.4% and 0.4- of cement quality
0.5%.
8. a kind of foamed concrete according to claim 6, it is characterised in that: the boric acid dosage becomes with environment temperature
Change, when environment temperature is respectively 5-20 DEG C and >=20 DEG C, the dosage of boric acid is respectively the 0.3% and 0.47% of cement quality.
9. a kind of preparation method of the foamed concrete as described in claim 1-8 any one, which is characterized in that including following
Step:
(1) it stocks up: getting cementitious material ready according to required parts by weight, strengthens filler, foaming agent, water and water-reducing agent；
(2) it prepares cement slurry: cementitious material and reinforcing filler powder being poured into blender and stirred evenly, mixed powder is obtained
Material, water-reducing agent is added to the water and is stirred evenly, and is obtained mixed liquor, then mixed powder is added in mixed liquor, is stirred evenly in stream
State slurry；
(3) it prepares foam: foaming agent and water being mixed in 1:40-50 ratio and are added in compression foaming machine, it is 500- that partial size, which is made,
1000 μm of foam；
(4) cement slurry and foams mix: the cement slurry that will be prepared in the slow steps for importing of foam (2) prepared in step (3)
In material, the two is uniformly mixed, mixing speed 10-20r/min, mixing time 2-5min；
(5) mixture of cement slurry and foam that step (4) obtains is poured into mold, is covered with preservative film, conserve 2-5
After it demoulding to get arrive prepared foamed concrete.
10. the preparation method of foamed concrete according to claim 9, it is characterised in that: in the step (2), gelling
Material and the mixing speed for strengthening filler powder are 100-150r/min, mixing time 6-10min；Side adds in the mixed liquor
Enter the stirring of mixed powder side, mixing speed 50-70r/min, mixing time 10-20min.
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| CN113003993A (en) * | 2021-04-21 | 2021-06-22 | 苏永青 | Foamed concrete and preparation process thereof |
| CN114163198A (en) * | 2021-12-31 | 2022-03-11 | 冀东水泥重庆混凝土有限公司 | High-strength anti-permeability foam concrete and preparation method thereof |
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Application publication date: 20190212 |