CN106927864A - A kind of light foam concrete filled for road and bridge and preparation method thereof - Google Patents
A kind of light foam concrete filled for road and bridge and preparation method thereof Download PDFInfo
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- CN106927864A CN106927864A CN201710243264.3A CN201710243264A CN106927864A CN 106927864 A CN106927864 A CN 106927864A CN 201710243264 A CN201710243264 A CN 201710243264A CN 106927864 A CN106927864 A CN 106927864A
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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
- 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
- C04B38/106—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam by adding preformed foams
-
- 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
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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
- 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
-
- 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
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
-
- 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
- C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
-
- 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
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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
- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- 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
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- Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a kind of light foam concrete filled for road and bridge and preparation method thereof, using the foam concrete light weight prepared by the present invention, the common backfilling material of strength ratio is high, it is the plastic gonosome of flowing during construction, it is easy to construction, the Industrial Solid Wastes such as slag, slag, flyash and plant straw fibers are largely make use of simultaneously, and economic, environmental protection, social benefit are notable.The present invention is achieved by following proposal：By ground polymers cement, mineral admixture, additive, improved plant stalk fibre mixing and stirring, appropriate water is subsequently adding, stirs into uniform and stable slurry；Again to foaming agent is continuously added in slurry, stir, mixing time is 5~10min；Filling construction operation is carried out after stirring.
Description
Technical field
The invention belongs to engineering material field, and in particular to a kind of light foam concrete filled for road and bridge and its system
Preparation Method.
Background technology
In the bridge construction for needing high roadbed, Abutment Back in road and bridge joint portion, it is flexible coupling under attachment strap between main bridge and access bridge
Deng position, routine is filled using the soil (such as gravelly soil or rock ballast soil) of low compression ratio.During construction, often fill a certain amount of
Soil need to be rolled, tamped, and after packing reaches design requirement, then carried out next layer and filled, roll, tamp, and filled to reach and set
After meter absolute altitude, road surface structare layer need to can be just carried out by the settlement after construction phase (some months, half a year or more than 1 year) of long period
Laying.Because the settlement after construction phase is more long, this ageing, engineering economy contradiction with bridge construction.In Abutment Back or main bridge
It is flexible coupling with access bridge or the changeover portion such as end of the bridge, after road surface structare layer laying completion is come into operation, because filler load is excessive, rainwater oozes
Enter, the bearing capacity of the ground reason such as not enough easily produces differential settlement, causes to jump car phenomenon, is referred to as bumping at bridge-head.Bridge
70% maintenance cost is spent in the repairing of bumping at bridge-head.Traditional processing method is to improve the bearing capacity of ground, not only
It is difficult to tackle the problem at its root, also there are problems that the duration is long, economy not.
Research finds that foam concrete is can to carry out the novel light concrete material that Abutment Back is filled instead of soil.Foam
Concrete is that the foaming agent aqueous solution is prepared into foam with physical method, then foam is added to by cement-based gelling material, collection
Material, additive and water finish mix slurry in, blended stirring, moulding by casting, natural curing a kind of porous light it is cast-in-place
Concrete.With lightweight, environmental protection, can the low unique performance characteristics of cast-in-place, cost.Foamed concrete material is applied to road and bridge bridge
Platform back of the body filling, is one and changes conventional Abutment Back filling process side's innovation of the law type technology.Foamed concrete material has
There is small density, light weight, intensity to be more than conventional backfill, fill after formed an entirety, shock resistance it is good, without lateral pressure
The advantage such as power, small to foundation load.After being filled using foam concrete, Abutment Back is in overconsolidation state, thus reduces sedimentation
With differential settlement, thoroughly eliminate abutment back embankment filler settlement after construction in itself, Bridgehead-Jumping Disease avoided, with obvious skill
Art advantage.Filled using foam concrete, work backstage back of the body maintenance cost can be greatly decreased, and bridge can be reduced by optimization design
Pile foundation consumption, integrated cost is low, with the economic advantages compared with high performance-price ratio.Foam concrete applies also for Soft Roadbed simultaneously
Slope backfill, subterranean tunnel off-loading, cavity are permitted in highway subgrade, road widening project enlarging, the precipitous section of mountain highway, overbridge cone slope
The fields such as filling.Therefore, good light foam concrete of inventing a kind of low cost, performance filled for road and bridge be one it is important and
Urgent work.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of light foam concrete filled for road and bridge and its system
Preparation Method.
The technical proposal of the invention is realized in this way：
A kind of light foam concrete filled for road and bridge, including following raw material are made, including ground polymers cement, bubble
Foam, mineral admixture, additive, improved plant stalk fibre.
Specifically, foam concrete of the present invention is in terms of parts by weight, including following raw materials：
Further, described ground polymers cement is prepared from by the following steps：By the pre- grinding of slag to granularity be 100~
150m2/ kg, retarder and mineralizer are added to it, and further grinding to granularity is 310~560m2/ kg, obtains ground polymers water
Mud product.
Further, the weight of described retarder is the 0.1~0.5% of the slag weight, the weight of the mineralizer
Measure is the 3.5~10.5% of the slag weight.Described retarder is ardealite, citric acid gypsum, desulfurated plaster, fluorgypsum
In the combination of one or more.Described mineralizer is by one or more in kaolin, bentonite, sepiolite and alkalescence
Material calcines the mineralising mixture of 25~95min formation naturally at 850~1100 DEG C, wherein, kaolin, bentonite, Hai Pao
One or more combination thing and the weight ratio of alkaline matter in stone are 0.2~4.5: 1.The alkaline matter be NaOH,
One or more in potassium hydroxide, potassium carbonate, sodium acid carbonate, sodium carbonate, saleratus.
Further, described mineral admixture is one or more groups in granulated blast-furnace slag powders, red mud, flyash
Close.
Further, the granulated blast-furnace slag powders should be less than 20% for fineness (0.045mm square hole screens are tailed over), and activity refers to
Number (28d) should be greater than 95%.The red mud is the tail mud produced by Bayer process electrolysis of aluminum oxide, and it contains attached liquid and should be less than 30%.
The flyash is the one-level and/or second class powered coal ash that thermal power plant produces, its SiO for mainly containing 30~65wt%2With 14.6
The Al of~41wt%2O3.Preferably, the loss on ignition of the flyash is 1~5wt%, more preferably 1~4wt%.
And in the present invention, there is no particular limitation to the foaming agent, physical blowing can be conventionally used for for this area
Various foaming agents.Animal protein foaming agent, rosin foaming agent, vegetable protein foaming agent can be enumerated as such foaming agent
With one or more in compound foaming agent.
Preferably, to meet construction requirement, 0-2.5 parts of additive can also be added in above-mentioned technical proposal.Additive
It is identical with usual foam concrete admixture, at least one such as in water reducer, waterproofing agent, retarder, coagulant, additive tool
The species and addition of body addition are determined depending on construction requirement.
Preferably, a kind of light foam concrete filled for road and bridge, including following raw material are made.
Specifically, foam concrete of the present invention is in terms of parts by weight, including following raw materials：
Further preferably, the foam concrete of addition additive is in terms of parts by weight, including following raw materials：
In above-mentioned technical proposal, the foam is prepared for the foaming agent aqueous solution, and foam density is 20kg/m3~
50kg/m3。
Further preferably, 0.5-2.5 parts of improved plant stalk fibre can also be added in above-mentioned technical proposal.It is described modified
Plant straw fibers are obtained by the following steps：Straw is crushed to 5-15mm, adjustment straw raw aqueous rate 25
~%, pH are 7~8, add 3%~5% carbonate (Na2CO3, NaHCO3Deng) swelling agent is helped, put after material is well mixed
Enter in heating while puffing machine, at 80~110 DEG C, drop temperature is 250~300 DEG C for feeding temperature control, puffing and modifying 15~
After 25min, classification sieving obtains final product improved plant stalk fibre.
Another object of the present invention is a kind of light foam concrete filled for road and bridge, is comprised the following steps：
1) it is 100~150m by the pre- grinding of slag to granularity2/ kg, adds retarder and mineralizer, further powder to it
Granularity is milled to for 310~560m2/ kg, obtains ground polymers cement products.
2) straw is crushed to 5-15mm, adjustment straw raw aqueous rate 25~%, pH are 7~8, are added
3%~5% carbonate (Na2CO3, NaHCO3Deng) swelling agent is helped, put into heating while puffing machine after material is well mixed,
At 80~110 DEG C, drop temperature is 250~300 DEG C for feeding temperature control, and after 15~25min of puffing and modifying, classification sieving is obtained final product
Improved plant stalk fibre.
3) by ground polymers cement, mineral admixture, additive, improved plant stalk fibre mixing and stirring, Ran Houjia
Enter appropriate water, stir into uniform and stable slurry；Again to foaming agent is continuously added in slurry, stir, mixing time is 5
~10min；Filling construction operation is carried out after stirring.
Beneficial effects of the present invention are as follows：
1st, substantial amounts of micro-bubble, resistance are contained in the slurry formed due to ground polymers cement, mineral additive, foam and water
Stop part slurry to be permeated to the hole in mineral admixture, so that mineral admixture has given play to the effect of lightweight aggregate.
It is 2nd, a large amount of in technical solution of the present invention to have saved the use of ordinary cement using prepared from steel slag standby ground polymers cement,
Increased the performances such as the intensity of foam concrete.
3rd, the use of improved plant stalk fibre so that foam concrete strength grade is improved, improves foam and mixes
Coagulate the service behaviour of soil.
4th, the use of big steel slag, flyash, granulated blast-furnace slag, reduces pollution of the Industrial Solid Waste to environment.Especially
It is the use of biological straw, reduces the burning of biological straw large area inorganization, improve atmospheric environment, also improves biological straw
The comprehensive utilization added value of stalk.
Specific embodiment
For a better understanding of the present invention, with reference to the embodiment content that the present invention is furture elucidated.
Raw material in following embodiments are prepared by following methods：
The preparation method of described ground polymers cement is：It is 100~150m by the pre- grinding of slag to granularity2/ kg, adds to it
Retarder and mineralizer, further grinding to granularity is 310~560m2/ kg, obtains ground polymers cement products.Described is slow
The weight of solidifying agent is the 0.1~0.5% of the slag weight, the weight of the mineralizer be the slag weight 3.5~
10.5%.Described retarder is the combination of one or more in ardealite, citric acid gypsum, desulfurated plaster, fluorgypsum.Institute
The mineralizer stated is natural at 850~1100 DEG C with alkaline matter by one or more in kaolin, bentonite, sepiolite
The mineralising mixture that 25~95min of calcining is formed, wherein, one or more combination thing in kaolin, bentonite, sepiolite with
The weight ratio of alkaline matter is 0.2~4.5: 1.The alkaline matter be NaOH, potassium hydroxide, potassium carbonate, sodium acid carbonate,
One or more in sodium carbonate, saleratus.
The preparation method of the improved plant stalk fibre is：Straw is crushed to 5-15mm, straw is adjusted
Raw aqueous rate 25~%, pH are 7~8, add 3%~5% carbonate (Na2CO3, NaHCO3Deng) swelling agent is helped, by material
Put into heating while puffing machine after well mixed, sorting temperature control is at 80~110 DEG C, and drop temperature is 250~300 DEG C, swollen
After changing modified 15~25min, classification sieving obtains final product improved plant stalk fibre.
The granulated blast-furnace slag powders should be less than 20% for fineness (0.045mm square hole screens are tailed over), and activity index (28d) should
More than 95%.
The red mud is the tail mud produced by Bayer process electrolysis of aluminum oxide, and it contains attached liquid and should be less than 30%.
The flyash is the one-level and/or second class powered coal ash that thermal power plant produces, and it mainly contains 30~65wt%'s
SiO2With the Al of 14.6~41wt%2O3.Preferably, the loss on ignition of the flyash be 1~5wt%, more preferably 1~
4wt%.
The physical foam is prepared for the foaming agent aqueous solution, and foam density is 20kg/m3~50kg/m3。
The additive is identical with usual foam concrete admixture, such as in water reducer, waterproofing agent, retarder, coagulant
At least one, additive specifically addition species and addition be determined depending on construction requirement.
Here is the embodiment of the light foam concrete that production is filled for road and bridge, by embodiment it will be seen that difference
The performance of the light foam concrete that raw material ratio is prepared.
Embodiment one
By 58 parts of ground polymers cement, 42 parts of mixing and stirrings of flyash, 23 parts of water are subsequently adding, stirred into uniform and stable
Slurry；Again to admixture 5 parts of foam of reason is continued in slurry, stir, mixing time is 10min；Carried out after stirring
Filling construction operation.
The present embodiment gained foam concrete dry density is 1046kg/m3, 28 days compression strength is 9.2MPa, thermal conductivity factor
It is 0.19W/ (mK).
Embodiment two
By 64 parts of ground polymers cement, 36 parts of mixing and stirrings of granulated blast-furnace slag powders, 32 parts of water are subsequently adding, stirred into
Uniform and stable slurry；Again to admixture 4 parts of foam of reason is continued in slurry, stir, mixing time is 5min；Stir
After carry out filling construction operation.
The present embodiment gained foam concrete dry density is 871kg/m3, 28 days compression strength is 6.7MPa, thermal conductivity factor
It is 0.16W/ (mK).
Embodiment three
By 75 parts of ground polymers cement, 22.5 parts of flyash, 2.5 parts of mixing and stirrings of water reducer, 23 parts of water are subsequently adding,
Stir into uniform and stable slurry；Again to admixture 3 parts of foam of reason is continued in slurry, stir, mixing time is 5min；Stir
Filling construction operation is carried out after mixing uniformly.
The present embodiment gained foam concrete dry density is 784kg/m3, 28 days compression strength is 4.8MPa, thermal conductivity factor
It is 0.17W/ (mK).
Example IV
By 90 parts of ground polymers cement, 5 parts of granulated blast-furnace slag powders, 5 parts of red mud, 0.5 part of mixing and stirring of water reducer, so
28 parts of water are added afterwards, stir into uniform and stable slurry；Again to admixture 3 parts of foam of reason is continued in slurry, stir, stir
Time is 5min；Filling construction operation is carried out after stirring.
The present embodiment gained foam concrete dry density is 815kg/m3, 28 days compression strength is 4.9MPa, thermal conductivity factor
It is 0.18W/ (mK).
Embodiment five
By 75 parts of ground polymers cement, 15 parts of granulated blast-furnace slag powders, 1.5 parts of mixing and stirrings of water reducer, it is subsequently adding
23 parts of water, stir into uniform and stable slurry；Again to admixture 3.2 parts of foam of reason is continued in slurry, stir, mixing time
It is 10min；Filling construction operation is carried out after stirring.
The present embodiment gained foam concrete dry density is 676kg/m3, 28 days compression strength is 3.7MPa, thermal conductivity factor
It is 0.18W/ (mK).
Embodiment six
By 90 parts of ground polymers cement, 6 parts of flyash, 5 parts of red mud, 1.2 parts of mixing and stirrings of retarder, 25 are subsequently adding
Part water, stirs into uniform and stable slurry；Again to admixture 3.5 parts of foam of reason is continued in slurry, stir, mixing time is
8min；Filling construction operation is carried out after stirring.
The present embodiment gained foam concrete dry density is 587kg/m3, 28 days compression strength is 3.4MPa, thermal conductivity factor
It is 0.21W/ (mK).
Embodiment seven
By 75 parts of ground polymers cement, 10 parts of granulated blast-furnace slag powders, 5 parts of red mud, 0.5 part of improved plant stalk fibre, slow
1.0 parts of mixing and stirrings of solidifying agent, are subsequently adding 23 parts of water, stir into uniform and stable slurry；Again to being continuously added in slurry
3 parts of physical foam, stirs, and mixing time is 10min；Filling construction operation is carried out after stirring.
The present embodiment gained foam concrete dry density is 478kg/m3, 28 days compression strength is 1.9MPa, thermal conductivity factor
It is 0.11W/ (mK).
Embodiment eight
By 82 parts of ground polymers cement, 10 parts of granulated blast-furnace slag powders, 2 parts of flyash, 2.0 parts of improved plant stalk fibre,
1.2 parts of mixing and stirrings of coagulant, are subsequently adding 24 parts of water, stir into uniform and stable slurry；Add to continuation in slurry again
Enter 3.2 parts of physical foam, stir, mixing time is 6min；Filling construction operation is carried out after stirring.
The present embodiment gained foam concrete dry density is 512kg/m3, 28 days compression strength is 2.1MPa, thermal conductivity factor
It is 0.11W/ (mK).
Embodiment nine
By 90 parts of ground polymers cement, 10 parts of granulated blast-furnace slag powders, 2.5 parts of improved plant stalk fibre, 1.5 parts of water reducer
Mixing and stirring, is subsequently adding 25 parts of water, stirs into uniform and stable slurry；Again to continuation admixture reason foam in slurry
3.5 parts, stir, mixing time is 10min；Filling construction operation is carried out after stirring.
The present embodiment gained foam concrete dry density is 382kg/m3, 28 days compression strength is 1.2MPa, thermal conductivity factor
It is 0.09W/ (mK).
As above-described embodiment number it has been found that foam concrete light weight prepared by the present invention, strength ratio commonly backfills material
Material is high, is the plastic gonosome of flowing during construction, is easy to construction.What is more important, the road and bridge prepared by the present invention are filled with bubble
Foam concrete has used the Industrial Solid Wastes such as slag, slag, flyash due to a large amount of, low cost, the addition of plant straw fibers, by force
Du Genggao.
Above-described embodiment is only preference of the invention, is not intended to limit the present invention, all within principle of the invention,
Any equivalent substitute, the modifications and variations done, within protection scope of the present invention.
Claims (9)
1. a kind of light foam concrete filled for road and bridge and preparation method thereof, it is characterised in that：Composition of raw materials presses quality
Meter is as follows：
2. a kind of light foam concrete filled for road and bridge according to claim 1 and preparation method thereof, its feature
It is to comprise the steps：
1) it is 100~150m by the pre- grinding of slag to granularity2/ kg, retarder and mineralizer are added to it, and further grinding is extremely
Granularity is 310~560m2/ kg, obtains ground polymers cement products.
2) by ground polymers cement, mineral admixture mixing and stirring, appropriate water is subsequently adding, stirs into uniform and stable material
Slurry；Again to admixture reason foam is continued in slurry, stir, mixing time is 5~10min；Filled after stirring
Construction operation.
3. a kind of light foam concrete filled for road and bridge according to claim 2 and preparation method thereof, its feature
It is that the weight of described retarder is the 0.1~0.5% of the slag weight, the weight of the mineralizer is the slag
The 3.5~10.5% of weight.Described retarder is the one kind or several in ardealite, citric acid gypsum, desulfurated plaster, fluorgypsum
The combination planted.Described mineralizer be by one or more in kaolin, bentonite, sepiolite and alkaline matter 850~
Naturally the mineralising mixture of 25~95min formation is calcined at 1100 DEG C, wherein, one kind in kaolin, bentonite, sepiolite or
Several compositions are 0.2~4.5: 1 with the weight ratio of alkaline matter.The alkaline matter is NaOH, potassium hydroxide, carbonic acid
One or more in potassium, sodium acid carbonate, sodium carbonate, saleratus.The physical foam is prepared for the foaming agent aqueous solution,
Foam density is 20kg/m3~50kg/m3。
4. a kind of light foam concrete filled for road and bridge according to claim 1 and preparation method thereof, its feature
It is that described mineral admixture is the one or more combination in granulated blast-furnace slag powders, red mud, flyash.The blast furnace
Granulated slag powder should be less than 20% for fineness (0.045mm square hole screens are tailed over), and activity index (28d) should be greater than 95%.It is described red
Mud is the tail mud produced by Bayer process electrolysis of aluminum oxide, and it contains attached liquid and should be less than 30%.The flyash is what thermal power plant produced
One-level and/or second class powered coal ash, its SiO for mainly containing 30~65wt%2With the Al of 14.6~41wt%2O3.The flyash
Loss on ignition be 1~5wt%.
5. a kind of light foam concrete filled for road and bridge and preparation method thereof, it is characterised in that：Composition of raw materials presses quality
Meter is as follows：
6. a kind of light foam concrete filled for road and bridge according to claim 5 and preparation method thereof, its feature
It is that additive is identical with usual foam concrete admixture, such as at least in water reducer, waterproofing agent, retarder, coagulant
Kind, the species and addition that additive is specifically added are determined depending on construction requirement.
7. a kind of light foam concrete filled for road and bridge and preparation method thereof, it is characterised in that：Composition of raw materials presses quality
Meter is as follows：
8. a kind of light foam coagulation filled for road and bridge according to claim 1, claim 5 and claim 7
Soil and preparation method thereof, it is characterised in that 0.5-2.5 parts of improved plant stalk fibre can also be added.
9. a kind of light foam concrete filled for road and bridge according to claim 8 and preparation method thereof, its feature
It is that the improved plant stalk fibre is obtained by the following steps：Straw is crushed to 5-15mm, straw is adjusted
Raw aqueous rate 25~%, pH are 7~8, add 3%~5% carbonate (Na2CO3, NaHCO3Deng) swelling agent is helped, by material
Put into heating while puffing machine after well mixed, feeding temperature control is at 80~110 DEG C, and drop temperature is 250~300 DEG C, swollen
After changing modified 15~25min, classification sieving obtains final product improved plant stalk fibre.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107892584A (en) * | 2017-11-20 | 2018-04-10 | 中建西部建设北方有限公司 | A kind of preparation method of light porous chamber Wheat Straw concrete plate |
| CN108046840A (en) * | 2017-12-14 | 2018-05-18 | 江苏德智重工有限公司 | A kind of enhanced foam concrete of rice straw and preparation method thereof |
| CN108129162A (en) * | 2017-12-18 | 2018-06-08 | 蚌埠市宝运商品混凝土有限公司 | A kind of light-weight environment-friendly concrete material |
| CN108975942A (en) * | 2018-09-21 | 2018-12-11 | 中冶成都勘察研究总院有限公司 | A kind of light-weight foamed concrete and preparation method thereof filled for road and bridge |
| CN109020614A (en) * | 2018-09-21 | 2018-12-18 | 山东大学 | A kind of red mud base Foam lightweight soil and preparation method thereof |
| CN109112969A (en) * | 2018-09-21 | 2019-01-01 | 中冶成都勘察研究总院有限公司 | A kind of foam concrete road and bridge filling construction method |
| CN110685204A (en) * | 2019-10-23 | 2020-01-14 | 常州易能科技有限公司 | Novel permeable pavement and construction process thereof |
| CN112048284A (en) * | 2020-08-24 | 2020-12-08 | 东南大学 | Geopolymer composite phase change material suitable for road subgrade, and preparation method and application thereof |
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| CN115745520A (en) * | 2022-11-28 | 2023-03-07 | 南京工业大学 | Method for preparing fly ash insulating brick by using puffed rice straw fiber |
| CN116621553A (en) * | 2023-06-08 | 2023-08-22 | 济南轨道交通集团有限公司 | Foam concrete and preparation method thereof |
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| CN107892584A (en) * | 2017-11-20 | 2018-04-10 | 中建西部建设北方有限公司 | A kind of preparation method of light porous chamber Wheat Straw concrete plate |
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| CN108129162A (en) * | 2017-12-18 | 2018-06-08 | 蚌埠市宝运商品混凝土有限公司 | A kind of light-weight environment-friendly concrete material |
| CN108975942A (en) * | 2018-09-21 | 2018-12-11 | 中冶成都勘察研究总院有限公司 | A kind of light-weight foamed concrete and preparation method thereof filled for road and bridge |
| CN109020614A (en) * | 2018-09-21 | 2018-12-18 | 山东大学 | A kind of red mud base Foam lightweight soil and preparation method thereof |
| CN109112969A (en) * | 2018-09-21 | 2019-01-01 | 中冶成都勘察研究总院有限公司 | A kind of foam concrete road and bridge filling construction method |
| CN109020614B (en) * | 2018-09-21 | 2020-08-21 | 山东大学 | Red mud-based foam light soil and preparation method thereof |
| CN110685204A (en) * | 2019-10-23 | 2020-01-14 | 常州易能科技有限公司 | Novel permeable pavement and construction process thereof |
| CN112048284A (en) * | 2020-08-24 | 2020-12-08 | 东南大学 | Geopolymer composite phase change material suitable for road subgrade, and preparation method and application thereof |
| CN113149530A (en) * | 2021-04-29 | 2021-07-23 | 山东大学 | Red mud modified foam light soil and preparation method and application thereof |
| CN115745520A (en) * | 2022-11-28 | 2023-03-07 | 南京工业大学 | Method for preparing fly ash insulating brick by using puffed rice straw fiber |
| CN116621553A (en) * | 2023-06-08 | 2023-08-22 | 济南轨道交通集团有限公司 | Foam concrete and preparation method thereof |
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Application publication date: 20170707 |