CN107324707A - A kind of thin-walled prefabricated components no vibrated concrete and its casting method - Google Patents
A kind of thin-walled prefabricated components no vibrated concrete and its casting method Download PDFInfo
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- CN107324707A CN107324707A CN201710549425.1A CN201710549425A CN107324707A CN 107324707 A CN107324707 A CN 107324707A CN 201710549425 A CN201710549425 A CN 201710549425A CN 107324707 A CN107324707 A CN 107324707A
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- 239000004567 concrete Substances 0.000 title claims abstract description 68
- 238000005266 casting Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000835 fiber Substances 0.000 claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 239000002893 slag Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229920003086 cellulose ether Polymers 0.000 claims abstract description 10
- 230000008595 infiltration Effects 0.000 claims abstract description 10
- 238000001764 infiltration Methods 0.000 claims abstract description 10
- 239000012209 synthetic fiber Substances 0.000 claims abstract description 10
- 229920002994 synthetic fiber Polymers 0.000 claims abstract description 10
- 239000002131 composite material Substances 0.000 claims abstract description 9
- 230000003467 diminishing effect Effects 0.000 claims abstract description 8
- 238000005194 fractionation Methods 0.000 claims abstract description 8
- 239000004576 sand Substances 0.000 claims abstract description 8
- 239000004575 stone Substances 0.000 claims abstract description 8
- 239000004568 cement Substances 0.000 claims abstract description 7
- 238000005516 engineering process Methods 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 7
- 238000009628 steelmaking Methods 0.000 claims abstract description 7
- 239000002562 thickening agent Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000003618 dip coating Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 2
- 239000003995 emulsifying agent Substances 0.000 claims description 2
- 150000002170 ethers Chemical class 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims description 2
- 229910052602 gypsum Inorganic materials 0.000 claims description 2
- 239000010440 gypsum Substances 0.000 claims description 2
- NCWQJOGVLLNWEO-UHFFFAOYSA-N methylsilicon Chemical compound [Si]C NCWQJOGVLLNWEO-UHFFFAOYSA-N 0.000 claims description 2
- 239000002105 nanoparticle Substances 0.000 claims description 2
- 229920000570 polyether Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 101001031591 Mus musculus Heart- and neural crest derivatives-expressed protein 2 Proteins 0.000 claims 1
- 239000004480 active ingredient Substances 0.000 claims 1
- 150000001298 alcohols Chemical class 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000013530 defoamer Substances 0.000 claims 1
- 239000004574 high-performance concrete Substances 0.000 abstract description 4
- 238000004078 waterproofing Methods 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 239000004566 building material Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 239000011178 precast concrete Substances 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000005336 cracking Methods 0.000 description 6
- 239000004033 plastic Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000011376 self-consolidating concrete Substances 0.000 description 3
- 230000000740 bleeding effect Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- -1 aliphatic alcohols Chemical class 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 229910052681 coesite Chemical group 0.000 description 1
- 229940125782 compound 2 Drugs 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 229910052906 cristobalite Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229920002338 polyhydroxyethylmethacrylate Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910052682 stishovite Chemical group 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229910052905 tridymite Chemical group 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
- B28B7/384—Treating agents
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/65—Water proofers or repellants
-
- 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
-
- 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
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/29—Frost-thaw resistance
-
- 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
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to building materials technology field, a kind of thin-walled prefabricated components no vibrated concrete and its casting method are disclosed.Without vibration high performance concrete includes the component of following parts by weight：Bonding component：Cement, 14 20 parts；Ground granulated blast furnace slag, 1.5 4.0 parts；Steel-making slag powder, 1.0 2.5 parts；Aggregate component：Sand, 25 33 parts；Stone, 37 44 parts；Diminishing component：0.30 0.45 parts；Expansion component：Composite expanding agent, 0.8 1.5 parts；Fibre fractionation：Steel fibre, 1.0 2.0 parts；Synthetic fibers, 0.01 0.04 parts；Thickener component：Cellulose ether, 0.004 0.006 parts；Infiltration component：Cementitious capillary crystalline waterproofing agent, 0.1 0.2 parts；Water：5.6 6.3 parts.Present invention substantially reduces noise during concrete prefabricated element shaping, reduce the generation in cavity and crack, it has been obviously improved crack resistance, volume stability and the surface abrasion resistance of thin-wall construction concrete, the stomata, pitted skin and honeycomb on precast concrete surface are effectively improved, the homogenieity and service life of thin-walled prefabricated components is significantly improved.
Description
Technical field
The present invention relates to a kind of thin-walled prefabricated components without vibration high performance concrete and its casting method, belong to construction material
And its arts.
Background technology
With the implementation energetically that building industrialization and component are standardized, building wall board, multi-compartment tube corridor and pre-stress steel cylinder are mixed
The large size, thin walled prefabricated components such as solidifying soil pipe obtain increasing production and applied, and this kind of product generally has wall thickness (rib
It is thick) big, the internal reinforcing bar of small, length is intensive, changeable planform or the features such as big external surface area.Concrete is used as prefabricated components
A kind of structural material, will not only there is suitable strength grade, should also have it is good can application property, crack resistance and impermeability, to carry
Rise structures overall durability and safety in utilization.The production of current overwhelming majority thin-walled prefabricated components is all using common modeling
Property concrete, all vibrated in the whole casting process of concrete, mode of vibration is typically attached to external mold or the gas of internal model
Dynamic vibrator, time of vibration refers to according to scantling a few minutes, at most half an hour at least to improve density, meet intensity
Target requirement.This mode of production easily produces some following problem：1. in vertical pour, sometimes highly up to 5~6m, and
Concrete wall thickness is only 0.1~0.3m, and common plastic concrete height, which is thrown, is also easy to produce segregation phenomenon when pouring, reduction concrete is apparent
Quality and internal homogeneity；Vibrating time is difficult to hold when 2. constructing, easily cross to shake, produces bleeding, influences the surface of concrete
Hardness and endurance quality；3. noise pollution is serious, unfriendly to environment, influences the physical and mental health of employee；4. vibrate the shaking of generation
It is dynamic that very lossy is produced to template and affiliated facility, easily there is deformation, loosen and displacement, need periodic replacement, increase production cost；
5. the production cycle of concrete vibrating mode is relatively long, and automaticity and efficiency are low, and influence of the human factor to product quality is larger,
Defect rate is high.
The content of the invention
In order to overcome above-mentioned technical disadvantages, the thin-walled the invention provides a kind of process raw material preferably with mixtures optimal design
Prefabricated components without vibration high performance concrete, makes it have good service behaviour, mechanical property, endurance quality and crack resistance
Energy；By improving casting craft, the apparent mass and production efficiency of concrete, the industrialization water of lifting building manufacture are significantly improved
It is flat.
To achieve the above object, the present invention uses following technical proposals：
A kind of thin-walled prefabricated components no vibrated concrete, it is characterised in that include the component of following parts by weight：
Bonding component：Cement, 14-20 parts；Ground granulated blast furnace slag, 1.5-4.0 parts；Steel-making slag powder, 1.0-2.5 parts；
Aggregate component：Sand, 25-33 parts；Stone, 37-44 parts；
Diminishing component：0.30-0.45 parts；
Expansion component：Composite expanding agent, 0.8-1.5 parts；
Fibre fractionation：Steel fibre, 1.0-2.0 parts；Synthetic fibers, 0.01-0.04 parts；
Thickener component：Cellulose ether, 0.004-0.006 parts；
Infiltration component：Cementitious capillary crystalline waterproofing agent, 0.1-0.2 parts；
Water：5.6-6.3 part.
The grain fineness number modulus is 2.7-3.0, and stone is 5~20mm particle diameter continuous gradings.
Diminishing component is the polyethers froth breaking for 8%~12% ethers polycarboxylic acid water reducing agent compounding 0.1 ‰ by solid content
Agent and 0.03 ‰ aliphatic alcohols air entraining agent and 0.1%~0.15% sodium sulfocyanate are formed, and can eliminate concrete mortar
In air pocket and the bubble that sandwiches so that inside concrete pore structure is uniform, closure, small, in maturing between stomata
It is less than 270 μm away from coefficient L.
The composite expanding agent is by light-burned MgO and CaO in mass ratio 3.5:1~6.5:1 mixes composition.
The fibre fractionation is assorted fibre, by fine chopped steel fibre and synthetic fibers in mass ratio 200:1~100:1
Mix composition.
The fine chopped length of steel fiber is 5-15mm, and 100-300 μm of diameter, draw ratio is not more than 60, modulus of elasticity
Not less than 200GPa；The synthetic fibers length be 10-20mm, 200-400 μm of diameter, draw ratio is not more than 60.
The cellulose ether is the slow soluble hydroxyethyl ether cellulose that particle diameter is not less than 50 mesh.More coarse grained cellulose ether
It is easily scattered without luming in water, and dissolution velocity is slower, it is ensured that the cohesiveness after slurry 1h.
Described infiltration component is by catalyst 23%~40%, fine silica sand 25%~42%, Active Filler White Carbon
18%~36%, gypsum 3%~7%, reactive compound 2%~5% are constituted.
A kind of casting method of thin-walled prefabricated components, it is characterised in that use any of the above-described described concrete and use
Horizontal casting craft cast, wherein horizontal casting craft is to put mold slanted, with ground into 5~10 ° of inclination angles, by concrete mixing
Thing injects from the charging aperture of bed die bottom, uniformly densely fills mould, the discharging opening to backform top is emerged.When laitance layer is complete
After portion overflows, occur stopping pumping during coarse aggregate in mixture, and close charging aperture and discharging opening.
Thin-walled prefabricated components are before pouring, in mould inner surface dip-coating steel-mixed interfacial agents formation film, interfacial agents be by
Methyl silicon resin 20%~35%, emulsifying agent 18%~30%, aliphatic acid 15%~27%, AEO 15%~
25%th, the high performance water-soluble steel that coalescents 5%~9%, nanoparticle 1%~3% are constituted-mixed interfacial agents.
Concrete and horizontal casting craft prepared by the present invention, with existing common plastic concrete and its vertical casting method
Compare, be mainly characterized in that：
(1) the thin-walled prefabricated components the invention provides a kind of process raw material preferably with mixtures optimal design are high with without vibration
Performance concrete, makes it have good service behaviour, greatly reduces noise during concrete formation, and realize hardening
Preceding Self-leveling and self-compaction after hardening, reduce cavity, the generation in crack；By improving casting craft, concrete is effectively improved
Stomata, pitted skin and the honeycomb of preform surfaces, significantly improve the apparent mass and production efficiency of concrete, lifting building manufacture
Industrialized level.
(2) concrete of the invention is mixed with composite expanding agent, the i.e. swelling agent containing double expansion sources；Wherein CaO can conduct
Early expansion source, compensates early-age shrinkage, and light-burned MgO stability is higher than reheating MgO, can compensate later stage receipts as late expansion source
Contracting, realizing has microdilatancy function in Life cycle, improve the anti-permeation cracking-resistant performance of thin wall concrete structure.
(3) tube core concrete of the invention can play volcanic ash jointly mixed with the steel-making slag powder and blast-furnace cinder of high activity
Effect and micro aggregate effect, improve intensity, compactness and the impermeability of concrete；Slag is main by Fe2O3, CaO and SiO2Group
Into can not only improve the mobility of concrete, can also increase the wearability of concrete, resistance external agency is to concrete surface
Erosion.
(4) assorted fibre in the present invention is uniformly dispersed into self-existent monofilament one by one in tube core concrete,
In three-dimensional random distribution.Before hardening, fiber can support aggregate, improve the plastic tensile strength of concrete, effectively reduce or keep away
Exempt from the plastic cracking of concrete；After hardening, fine chopped steel fibre can give full play to the spy that tensile strength is high, modulus of elasticity is big
Point, the stress concentration during suppressing thin wall concrete under arms, disperses shrinkage stress, improves the crack resistance of concrete component
Energy.
(5) concrete of the invention can react mixed with infiltration component in inside concrete, generate the steady of complicated and confused shape
Fixed crystalline complex, filling capillary porosity, blocking microcrack improve the compactness and impermeability of concrete, so as to prevent
Infiltration of the extraneous corrosive ions to inside configuration, protects concrete with steel cylinder from corroding；In addition, passing through the association with synthetic fibers
Same-action, can greatly improve the cracking resistance of thin wall concrete structure.
(6) concrete of the invention, not only with good water-retaining property, preserves enough hydrones mixed with cellulose ether
Inside slurry, the development of the aquation and intensity of cement is met, and enhances the cohesiveness of concrete, slurry is overcome and exists
When height throws vertical pour the problem of isolation, bleeding.
(7) by the Self-leveling of concrete, self-compaction, and in punching block inner surface brushing high-quality steel-mixed interfacial agents, effectively
The stomata, pitted skin and honeycomb of concrete surface are eliminated, the anti-crack and anti-seepage performance of concrete is improved, strengthens to reinforcing bar or steel
The protectiveness of cylinder.
(8) it is proposed by the present invention to exempt from vibro-moulding process, the noise that vibrates of plastic concrete is effectively prevent, without to shake
The dynamic consumption energy, and fatigue rupture will not be produced to punching block, reduce the production cost of prefabricated components.
(9) horizontal casting craft of the invention can solve well vertical, high throwing pour caused by slurry osteodiastasis, homogeneous
Property difference the problem of, concrete mix under mechanical pump pressure effect from the injection of bottom charging aperture, by being rubbed with steel cylinder, mould
Wipe, finally overflow discharging opening, can effectively eliminate bubble, closely knit hole, so as to improve the compactness and apparent mass of concrete.
Overall structure of the present invention is simple, and design science is reasonable, the prefabricated components poured using without vibration high performance concrete
With good apparent mass, mechanical property, dimensional stability and endurance quality, and casting craft is simple, automation and industry
Change degree is high, and there is significant technology to pass through in the thin-walled prefabricated components such as building wall board, prefabricated piping lane and cylinder concrete pipe field
Ji value.
Brief description of the drawings：
Fig. 1 is horizontal casting craft schematic diagram proposed by the present invention.
Wherein, 1, die feeding mouthful, 2, mould discharging mouthful.
Embodiment：
Embodiment 1
Exemplified by pouring cylinder-shaped thin wall prefabricated components, casting method is：
First, concrete is configured：
Bonding component：Cement, 15.0 parts；Ground granulated blast furnace slag, 2.0 parts；Steel-making slag powder, 1.9 parts；
Aggregate component：Sand, 33.0 parts；Stone, 39.3 parts；
Diminishing component：0.42 part；
Expansion component：Composite expanding agent, 1.25 parts；
Fibre fractionation：Steel fibre, 1.0 parts；Synthetic fibers, 0.02 part；
Thickener component：Cellulose ether, 0.005 part；
Infiltration component：0.1 part；
Water：6.005 part.
Mixture slump flow test is 630mm, T after the self-compacting concrete prepared using the match ratio, 1h500For 7s, slurry
Body fluidity is big, and cohesiveness is good, no excreting water phenomenon；According to《Fiber concrete structure technology code》(CECS38：2004) in
Flat band method, reaches I grades of cracking resistance grades；7d and 28d compression strength is respectively 43.7MPa and 64.2MPa, seepage-resistant grade up to P10,
Freeze proof grade is up to F125, excellent surface quality after the concrete sample demoulding.
Secondly, the automatic pouring of cylinder-shaped thin wall prefabricated components is carried out by horizontal casting craft：Specifically by dip-coating steel-
The mold slanted of mixed interfacial agents is put, and with ground into 5~10 ° of angles, is entered concrete mix from the mould of bed die bottom with compression pump
Material mouth 1 is injected, and uniformly densely fills mould, and the mould discharging mouthful 2 to backform top is emerged.After laitance layer all overflows,
Occur stopping pumping during coarse aggregate in mixture, and close charging aperture and discharging opening.
Embodiment 2
Bonding component：Cement, 16.3 parts；Ground granulated blast furnace slag, 1.6 parts；Steel-making slag powder, 1.6 parts；
Aggregate component：Sand, 31.8 parts；Stone, 40.6 parts；
Diminishing component：0.45 part；
Expansion component：Composite expanding agent, 0.85 part；
Fibre fractionation：Steel fibre, 0.85 part；Synthetic fibers, 0.03 part；
Thickener component：Cellulose ether, 0.006 part；
Infiltration component：0.1 part；
Water：5.814 part.
Mixture slump flow test is 625mm, T after the self-compacting concrete prepared using the match ratio, 1h500For 11s,
Slurry fluidity is larger, and cohesiveness is preferable, no excreting water phenomenon；According to《Fiber concrete structure technology code》(CECS38：
2004) flat band method in, reaches I grades of cracking resistance grades；7d and 28d compression strength is respectively 47.3MPa and 67.3MPa, impervious etc.
Level is up to P10, and freeze proof grade is up to F125, excellent surface quality after the concrete sample demoulding.
Embodiment 3
Bonding component：Cement, 14.6 parts；Ground granulated blast furnace slag, 2.1 parts；Steel-making slag powder, 2.1 parts；
Aggregate component：Sand, 30.5 parts；Stone, 41.8 parts；
Diminishing component：0.41 part；
Expansion component：Composite expanding agent, 1.26 parts；
Fibre fractionation：Steel fibre, 1.2 parts；Synthetic fibers, 0.04 part；
Thickener component：Cellulose ether, 0.005 part；
Infiltration component：0.15 part；
Water：5.835 part.
Mixture slump flow test is 605mm, T after the self-compacting concrete prepared using the match ratio, 1h500For 16s,
Slurry fluidity is moderate, and cohesiveness is preferable, no excreting water phenomenon；According to《Fiber concrete structure technology code》(CECS38：
2004) flat band method in, reaches I grades of cracking resistance grades；7d and 28d compression strength is respectively 44.2MPa and 64.9MPa, impervious etc.
Level is up to P10, and freeze proof grade is up to F125, excellent surface quality after the concrete sample demoulding.
Claims (10)
1. a kind of thin-walled prefabricated components no vibrated concrete, it is characterised in that include the component of following parts by weight：
Bonding component：Cement, 14-20 parts；Ground granulated blast furnace slag, 1.5-4.0 parts；Steel-making slag powder, 1.0-2.5 parts；
Aggregate component：Sand, 25-33 parts；Stone, 37-44 parts；
Diminishing component：0.30-0.45 parts；
Expansion component：Composite expanding agent, 0.8-1.5 parts；
Fibre fractionation：Steel fibre, 1.0-2.0 parts；Synthetic fibers, 0.01-0.04 parts；
Thickener component：Cellulose ether, 0.004-0.006 parts；
Infiltration component：0.1-0.2 parts；
Water：5.6-6.3 part.
2. a kind of thin-walled prefabricated components no vibrated concrete as claimed in claim 1, it is characterised in that the grain fineness number mould
Number is 2.7-3.0, and stone is 5 ~ 20mm continuous grading.
3. a kind of thin-walled prefabricated components no vibrated concrete as claimed in claim 1, it is characterised in that diminishing component be by
Solid content first compounds 0.1 ‰ polyethers defoamer for 8% ~ 12% ethers polycarboxylic acid water reducing agent, then mixes 0.03 ‰ fat
Alcohols air entraining agent and 0.1% ~ 0.15% sodium sulfocyanate are formed.
4. a kind of thin-walled prefabricated components no vibrated concrete as claimed in claim 1, it is characterised in that described composite expanded
Agent is by light-burned MgO and CaO in mass ratio 3.5:1~6.5:1 mixes composition.
5. a kind of thin-walled prefabricated components no vibrated concrete as claimed in claim 1, it is characterised in that the fibre fractionation
For assorted fibre, by fine chopped steel fibre and synthetic fibers in mass ratio 200:1~100:1 mixes composition；The cellulose ether
It is not less than the slow soluble hydroxyethyl ether cellulose of 50 mesh for particle diameter.
6. a kind of thin-walled prefabricated components no vibrated concrete as claimed in claim 5, it is characterised in that described fine chopped
Length of steel fiber is 5-15mm, diameter 100-300, draw ratio is not more than 60, and modulus of elasticity is not less than 200；It is described to close
It is 10-20 into fibre length, diameter 200-400, draw ratio is not more than 60.
7. a kind of thin-walled prefabricated components no vibrated concrete as claimed in claim 1, it is characterised in that the infiltration component
It is by catalyst 23% ~ 40%, fine silica sand 25% ~ 42%, Active Filler White Carbon 18% ~ 36%, high strength gypsum 3% ~ 7%, active ingredient
Thing 2% ~ 5% is constituted.
8. a kind of casting method of thin-walled prefabricated components, it is characterised in that using any described concrete of claim 1-7 simultaneously
Using horizontal pumping technology automatic casting, wherein horizontal casting craft is to put mold slanted, with ground into 5 ~ 10 ° of inclination angles, pass through
Compression pump injects concrete mix from the charging aperture of bed die bottom, mould is uniformly densely filled, until backform top
Discharging opening emerge coarse aggregate when stop material feeding.
9. casting method according to claim 8, it is characterised in that：Before concreting, in mould inner surface dip-coating
Steel-mixed interfacial agents formation film, the steel-mixed interfacial agents are by methyl silicon resin 20% ~ 35%, emulsifying agent 18% ~ 30%, aliphatic acid
15% ~ 27%, the water-soluble steel that AEO 15% ~ 25%, coalescents 5% ~ 9%, nanoparticle 1% ~ 3% are constituted-mixed
Interfacial agents.
10. casting method as claimed in claim 9, it is characterised in that the charging aperture of the mould uses self-locking with compression pump
Device is connected, and the valve that material mouth is driven on automatic top into during access is poured into a mould, it is to be cast it is complete after, extract compression pump, valve closing stops
Only pour into a mould；The discharging opening of the mould is characterised by the stock tank that overflows, and can observe the trickling situation of slurry, treat that laitance laminar flow is complete, thick
After aggregate outflow, discharging opening valve is closed.
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