CN107298591A - C40 grades of slag sand self-compacting concretes and preparation method thereof, prefabricated components - Google Patents
C40 grades of slag sand self-compacting concretes and preparation method thereof, prefabricated components Download PDFInfo
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- CN107298591A CN107298591A CN201710605375.4A CN201710605375A CN107298591A CN 107298591 A CN107298591 A CN 107298591A CN 201710605375 A CN201710605375 A CN 201710605375A CN 107298591 A CN107298591 A CN 107298591A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
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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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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
This application provides a kind of C40 grades of slag sand self-compacting concrete, its water-cement ratio is controlled between 0.3~0.7, and wherein raw material components fraction by weight is calculated and included：The parts by weight of Steel-slag Sand 2~10；The parts by weight of glass microballoon 2~10；The parts by weight of cement 2~10；The parts by weight of natural coarse aggregate 7~10；The parts by weight of regenerated coarse aggregate 2~6；The parts by weight of sand 2~10；The parts by weight of flyash 0.5~1.1；The parts by weight of water 2~10.Obtained self-compacting concrete has good mobility, clearance through, education resistance, meets intensity requirement.It is easy to reduce concrete production cost while construction, preparation method is simple, is adapted to industrialized production.
Description
Technical field
The application is related to building material technical field, particularly new self-compacting concrete field, specifically,
It is related to the preparation method and application of a kind of C40 grades of slag sand self-compacting concrete and C40 grades of slag sand self-compacting concretes.
Background technology
Self-compacting concrete (Self-Consolidating Concrete abbreviation SCC) refers under self gravitation effect,
Can flow, it is closely knit, template can be also filled up completely with even if there is fine and close reinforcing bar, while obtain fine homogenieity, and need not
The concrete of extraneous vibration.The general selection by additive, cementing material and coarse-fine aggregate of self-compacting concrete is prepared with taking
With with rational mix-design, the yield stress of concrete is reduced to be enough by because deadweight produce shear stress overcome, make
Concrete flowability increase, while again have enough plastic viscosities, make aggregate be suspended in cement mortar, occur without isolation and
Bleeding problem, can freely trickle and be sufficient filling with the space in template, form closely knit and uniform jelling structure.
The slag of discharge is made steel, discharge rate is about the 15~20% of crude steel yield.Slag it is main by calcium, iron, silicon, magnesium and
The oxide composition of a small amount of aluminium, manganese, phosphorus etc..Main mineral facies are tricalcium silicate, dicalcium silicate, monticellite, calcium and magnesium rose
Common vetch pyroxene, calcium aluminoferrite and silicon, magnesium, iron, manganese, phosphorus oxide formation solid solution, also containing a small amount of free calcium oxide with
And metallic iron, fluor-apatite etc..Also these compositions are slightly contained in slag because of ore titaniferous and vanadium in some areas.It is various in slag
Difference of the content of composition because of the steel-making type of furnace, steel grade and per the stove steel smelting stage, there is larger difference.Slag is carried out at present
Broken, screening, magnetic separation, to reclaim after wherein metal, recovered metal, metal ingredient is greatly reduced in slag, and profit is reclaimed at present
With difficulty, as discarded slag.
Discarded slag is currently without good Land use systems, and the present invention is therefore.
The content of the invention
The application aims to provide a kind of C40 grades of slag sand self-compacting concrete, to solve the problems of the prior art.
To achieve these goals, it is mixed there is provided a kind of C40 grades of slag sand self-compacting according to the one side of the application
Solidifying soil, its water-cement ratio is controlled between 0.3~0.7, and wherein raw material components fraction by weight is calculated and included：
The parts by weight of Steel-slag Sand 2~10；
The parts by weight of glass microballoon 2~10；
The parts by weight of cement 2~10；
The parts by weight of natural coarse aggregate 7~10；
The parts by weight of regenerated coarse aggregate 2~6；
The parts by weight of sand 2~10；
The parts by weight of flyash 0.5~1.1；
The parts by weight of water 2~10.
It is preferred that technical scheme be：The particle diameter of the Steel-slag Sand is more than 15 μm, and less than or equal to 50 μm, its water absorption rate exists
30%~50%.
It is preferred that technical scheme be：The Steel-slag Sand is to carry out powder to discarded slag through disintegrating apparatus or milling apparatus
Broken processing, then carries out sorting acquisition by sorting device to different-grain diameter.
It is preferred that technical scheme be：The particle diameter of glass microballoon is at 15 μm~50 μm, and its density is in 0.1-0.25g/cm3。
It is preferred that technical scheme be：Wherein raw material components fraction by weight is calculated and included：
The parts by weight of Steel-slag Sand 2~10；
The parts by weight of glass microballoon 2~10；
The parts by weight of cement 2~8；
The parts by weight of natural coarse aggregate 7~10；
The parts by weight of regenerated coarse aggregate 2~6；
The parts by weight of sand 2~10；
The parts by weight of flyash 0.5~1.1；
The parts by weight of water 2~8.
It is preferred that technical scheme be：Wherein raw material components fraction by weight is calculated and included：
The parts by weight of Steel-slag Sand 2~8；
The parts by weight of glass microballoon 2~8；
The parts by weight of cement 2~10；
The parts by weight of natural coarse aggregate 7~10；
The parts by weight of regenerated coarse aggregate 2~6；
The parts by weight of sand 2~10；
The parts by weight of flyash 0.5~1.1；
The parts by weight of water 2~10.
It is preferred that technical scheme be：Wherein raw material components fraction by weight is calculated and included：
The parts by weight of Steel-slag Sand 2~8；
The parts by weight of glass microballoon 2~8；
The parts by weight of cement 2~5；
The parts by weight of natural coarse aggregate 7~10；
The parts by weight of regenerated coarse aggregate 2~6；
The parts by weight of sand 2~10；
The parts by weight of flyash 0.5~1.1；
The parts by weight of water 4~8.
It is preferred that technical scheme be：
The water-cement ratio of the C40 grades of slag sand self-compacting concrete is 0.3~0.65；It is preferred that, the C40 grades of slag
The water-cement ratio of sand self-compacting concrete is 0.3,0.32,0.54,0.62.
It is preferred that technical scheme in：The regenerated coarse aggregate be by by the discarded concrete in building waste it is sorted,
Broken and screening, removes after the particle less than 9.50mm and more than 20mm, is processed into aggregate size scope 10~20mm's
The namely regenerated coarse aggregate of particle diameter section.
It is preferred that technical scheme in：The natural coarse aggregate uses the rubble of 5~20mm continuous size fractions, and apparent density is
2.75g/cm3, bulk density is 1.35g/cm3, water absorption rate is 0.45%.
It is preferred that technical scheme in：The apparent density of the regenerated coarse aggregate is controlled in 2.35g/cm3, bulk density control
System is in 1.23g/cm3, water absorption rate control is 4.76%.
Another object of the present invention is to provide a kind of preparation method of described C40 level slag sand self-compacting concretes,
Characterized in that, the described method comprises the following steps：
(1) Steel-slag Sand, cement and glass microballoon are mixed thoroughly in advance according to scheduled volume, obtains A material；
(2) fed intake and then startup according to the order of preset blending ratio natural coarse aggregate, regenerated coarse aggregate, sand, A material, flyash
Mixer, 1~10min of dry mixing；Then water is added, continues to stir 1~10min, stirs and produce described C40 level slags
Sand self-compacting concrete.
A further object of the present invention is to provide what a kind of described C40 level slag sand self-compacting concretes were prepared from
Concrete component.
Water absorption rate refers to refer to soaks material in water the increased weight percent of certain time institute at a certain temperature.
Specific preparation process can be carried out in accordance with the following steps：
(1) discarded concrete in building waste is screened out less than 9.50mm and is more than by sorting, broken and screening
After 20mm particle, regenerated coarse aggregate is processed into 10mm~20mm particle diameters section with aggregate size；
(2) to prevent viscous pot, each material is weighed in right amount, mixing concrete, machine inwall to be mixed is stained with cement mortar, takes
Go out concrete, A material, regenerated coarse aggregate, natural coarse aggregate, water, flyash are weighed by match ratio, according to regenerated coarse aggregate, naturally
Coarse aggregate, A material, the order of flyash feed intake and then startup mixer, dry mixing 1min~10min；
(3) load weighted water and additional water are added, continues to stir 1min~10min.
It is preferred that technical scheme be：The cement is PO42.5 Portland cements；The flyash is I grades of powder
Coal ash.
The Steel-slag Sand of the present invention is the discarded slag after recovered utilization, is formed after reprocessing.The Steel-slag Sand of the present invention
Pulverization process is carried out to discarded slag through disintegrating apparatus or milling apparatus, then different-grain diameter carried out by sorting device
Sorting is obtained, and particle diameter is steel-making slag powder at 1 μm~15 μm, and it is Steel-slag Sand that particle diameter, which is more than 15 μm, and both physical properties are totally different.Through grinding
Study carefully confirmation, the compact rate of molding of steel-making slag powder is 40%~60%, and its shatter index is less than 15.And the compact rate of molding feature of Steel-slag Sand is failed to understand
Aobvious, significantly, water absorption rate is 30%~50%, and its shatter index is more than or equal to 15, can match somebody with somebody with glass microballoon for its water absorbing properties
Close, substituted as the perfect of yellow ground in self-compacting concrete.The substitution rate of yellow ground can be 30%~70%.
Shatter index (shatter index) is evaluation steel-making slag powder or the index of Steel-slag Sand toughness, and common method is standard
Cylinder steel-making slag powder or Steel-slag Sand from the riveting stake that specified altitude falls in the middle part of 6 eye mesh screens, residual on this screen steel-making slag powder or
The weight of Steel-slag Sand accounts for the percentage of gross weight.
After such scheme, the present invention has the advantages that following prominent and effect compared with prior art：
(1) the C40 level slag sand self-compacting concretes that the present invention is obtained not only simplify manufacturing procedure, and reduce
Cost.Research at present to the processing of the discarded slag after recovered utilization is seldom.Therefore, self-compaction regeneration aggregate is prepared to mix
Solidifying soil not only can effectively solve environment and the social concern that building waste is caused, also certain economic benefit, and implement
Country economizes on resources, the techno-economic policy of green production.
(2) the C40 level slag sand self-compacting concretes that the present invention is obtained have its own advantages of self-compacting concrete, can
So that under self gravitation, filling template while having excellent homogenieity, and does not need extraneous vibration, it is to avoid vibrate pair
The abrasion that template is produced, adds the free degree of structure design, reduces abrasion of the concrete to mixer, it is ensured that concrete is good
It is closely knit well.Good mobility, clearance through, anti-isolation are had according to the C40 level self-compacting concretes that the present invention is prepared
Property, meet intensity requirement.It is easy to reduce concrete production cost while construction, preparation method is simple, is adapted to industry metaplasia
Production.
(3) the C40 level slag sand self-compacting concretes that the present invention is obtained have the advantage of several industrial, particularly build
Industry, chemical industry (adulterating agent manufacturer), all construction markets (building, civil engineering or precasting factory), equipment build industry
(the construction industry of units) or cement industry.
Embodiment
It is noted that described further below is all exemplary, it is intended to provide further instruction to the application.Unless
Otherwise indicated, all technologies used herein and scientific terminology have and the application person of an ordinary skill in the technical field
The identical meanings being generally understood that.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise odd number shape
Formula is also intended to include plural form, additionally, it should be understood that, when in this manual use term "comprising" and/or
During " comprising ", it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
It should be noted that term " first ", " second " in the description and claims of this application etc. is to be used for
The similar object of difference, without for describing specific order or precedence.It should be appreciated that the data so used are suitable
Can be exchanged in the case of, so as to presently filed embodiment described herein for example can with except it is described here that
Order beyond a little is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that covering is not arranged
His includes, for example, the process, method, system, product or the equipment that contain series of steps or unit be not necessarily limited to it is clear
Those steps or unit that ground is listed, but may include not list clearly or for these processes, method, product or
The intrinsic other steps of equipment or unit.
For the ease of description, space relative terms can be used herein, such as " ... on ", " ... top ",
" in ... upper surface ", " above " etc., for describe a part or module or feature and miscellaneous part or module or
The spatial relation of feature.It should be appreciated that space relative terms are intended to include except described by part or module
Different azimuth in use or operation outside orientation.If for example, part or module are squeezed, be described as " at it
After the part or module of his part or module or construction top " or " on miscellaneous part or module or construction "
It will be positioned as " below miscellaneous part or module or construction " or " under miscellaneous part or module or construction ".Cause
And, exemplary term " in ... top " can include " in ... top " and " in ... lower section " two kinds of orientation.The part or
Person's module can also other different modes positioning (being rotated by 90 ° or in other orientation), and to space used herein above
Respective explanations are made in relative description.
In a kind of typical embodiment of the application, it is proposed that a kind of C40 grades of slag sand self-compacting concrete, its glue
Than controlling between 0.3~0.7, wherein raw material components fraction by weight is calculated and included：
The parts by weight of Steel-slag Sand 2~10；
The parts by weight of glass microballoon 2~10；
The parts by weight of cement 2~10；
The parts by weight of natural coarse aggregate 7~10；
The parts by weight of regenerated coarse aggregate 2~6；
The parts by weight of sand 2~10；
The parts by weight of flyash 0.5~1.1；
The parts by weight of water 2~10.
The invention further relates to a kind of C40 grades of self-compacting concrete preparation method, comprise the following steps:
(1) discarded concrete in building waste is screened out less than 9.50mm and is more than by sorting, broken and screening
After 20mm particle, regenerated coarse aggregate is processed into 10mm~20mm particle diameters section with aggregate size；
(2) to prevent viscous pot, each material is weighed in right amount, mixing concrete, machine inwall to be mixed is stained with cement mortar, takes
Go out concrete, A material, regenerated coarse aggregate, natural coarse aggregate, water, flyash are weighed by match ratio, according to regenerated coarse aggregate, naturally
Coarse aggregate, A material, the order of flyash feed intake and then startup mixer, dry mixing 1min~10min；
(3) load weighted water and additional water are added, continues to stir 1min~10min.
Term explanation
Cement in technical solution of the present invention, including but not limited to portland cement or other blended cements etc..Wherein silicic acid
Salt cement, including but not limited to low-heat portland cement, Portland cement, early strength silicate cement, super hardening silicate
Cement, moderate-heat portland cement, sulfate resisting Portland cement etc..In addition, blended cement, including but not limited to blast-furance cement,
Silica cement, pulverized fuel ash cement etc..As cement, portland cement is preferred, wherein, Portland cement, middle hot silicon
Acid salt cement or low-heat portland cement are preferred.The label of cement is the index of cement " intensity ".The intensity of cement is table
Show the size of unit area stress, after referring to that cement plus water is mixed and stirred, solid degree of the cement mortar after condensing, hardening be (cement
Ratio added water in temperature, humidity and cement when intensity is with the composition mineralogical composition of cement, grain fineness, hardening etc. because
Have pass), typically take cubic compressive strength when 28d is conserved under the conditions of standard curing.PO42.5 Portland cements
As strength grade is 42.5 Portland cement.
As the aggregate for concrete, coarse aggregate and fine aggregate can be included.Here, add in self-compacting concrete
Plus it is used as the coarse aggregate and fine aggregate of aggregate.As coarse aggregate, river gravel, sea gravel, mountain gravel, rubble, slag can be included
Rubble etc., as fine aggregate, can include river sand, sea sand, mountain sand etc..In addition, coarse aggregate and fine aggregate can be according to common
Classify (screening etc.) to distinguish.
Regenerated coarse aggregate be by the discarded concrete in building waste it is sorted, broken and screening, remove be less than 9.50mm
After the particle more than 20mm, particle diameter section of the aggregate size scope being processed into 10~20mm.
In addition, in this concrete, from the viewpoint of sufficient intensity is obtained, per 1m3The concrete is preferably
700~1000kg, more preferably 800~900kg, in addition, the content of coarse aggregate is per 1m3Concrete is preferably 800~1100kg,
More preferably 850~950kg.This concrete can for example be obtained in the following way：Cement additive, flyash are added
It is added in cement, forms cement composition, then water and aggregate are added in the cement composition mixed, is derived from.
As long as however, because the concrete of the present invention contains above-mentioned cement additive in its composition, therefore, it can in coagulation
Soil is added when preparing.The fine aggregate is middle sand, and the additive is polycarboxylate water-reducer, and the cement is that PO42.5 is general
Logical portland cement, the flyash is I grades of flyash.
In addition, further containing concrete admixture in concrete.Concrete admixture is during ready-mixed concrete
Incorporation, accounts for cement quality below 5%, can significantly improve concrete performance.As preferred, concrete admixture is diminishing
Agent.As water reducer, water reducer, AE water reducers, high-performance water reducing agent, high performance AF dehumidifying agent can be applied without limitation
Deng being used as the material well known to the water reducer used in concrete.The water reducer of polybasic carboxylic acid system is preferred.Water reducer is in water
Content in mud composition is preferably 0.8~3.0% cement quality.In addition, water reducer can add not as cement additive
Enter, but added when preparing concrete.
Water reducer is defined as the concrete for giving machinability, will mix water and generally reduces 10% to 15%
Additive.Water reducer includes, for example, ligninsulfonate, hydroxycarboxylic acid, hydrocarbon and other special organic compounds (such as glycerine,
Polyvinyl alcohol, methyl sodium silicoaluminate, sulfanilic acid and casein).High-performance water reducing agent, including but not limited to naphthalene series high-efficiency diminishing
Agent, high-efficiency water-reducing agent of poly-carboxylic acid and aliphatic high-efficiency water reducing agent.Wherein naphthalene series high-efficiency water-reducing agent is condensed for naphthalene sulphonate formaldehyde
Thing.Aliphatic high-efficiency water reducing agent is the burnt aldehyde of carbonyl of acetone sulfonation synthesis.Polycarboxylate water-reducer (Poly-carboxylate
Super-plasticizer it is) a kind of high-performance water reducing agent, is a kind of cement dispersants during cement concrete is used, chemistry
On can be divided into two classes, using main chain as methacrylic acid, side chain be hydroxy-acid group and MPEG (Methoxypolyethylene
Glycol), polyester type structure.Another is that main chain is polyacrylic acid, and side chain is Vinyl alcohol polyethylene
Glycol, polyether-type structure.
Aggregate, i.e., play the granular loose material of skeleton or filling effect in concrete.Aggregate is used as the master in concrete
Raw material is wanted, skeleton and supporting role are played between floors.The aggregate that particle diameter is more than 4.75mm is referred to as coarse aggregate, is commonly called as stone.It is conventional
Have two kinds of rubble and cobble.Rubble be natural rock or rock through Mechanical Crushing, be sieved into, particle diameter be more than 4.75mm
Rock particles.Cobble be by weathering, potamic transport and sorting, accumulation, particle diameter be more than 4.75mm rock
Grain.2.4 times of persons of average grain diameter that the length of cobble and gravel particle is more than corresponding grade belonging to the particle are elongated piece；It is thick
It is sheet-like particle that degree, which is less than 0.4 times of person of average grain diameter, (average grain diameter refers to the average value of the grade superior and inferior limit of particle size).It is for building
Cobble, rubble should meet standard GB/T/T 14685-2011《Cobble for building, rubble》Technical requirements.Particle diameter
Below 4.75mm aggregate is referred to as fine aggregate, is commonly called as sand.Sand is divided into natural sand, the class of artificial sand two by production source.Natural sand is by certainly
Right weathering, potamic transport and sorting, accumulation are formed, particle diameter is less than 4.75mm rock particles, but does not include soft rockmass, wind
Change the particle of rock.Natural sand includes river sand, lake sand, mountain sand and desalted sea sand.Artificial sand be through except soil processing Machine-made Sand,
The general designation of mixed sand.
The natural coarse aggregate of the present invention is typically conventional coarse aggregate.Flyash, is received from the flue gas after coal combustion
The fine ash got off is caught, flyash is the primary solids waste of coal-burning power plant's discharge.Flyash can as concrete admixture.
Hollow glass micropearl is a kind of small hollow glass spheroid of size, belongs to inorganic non-metallic material.Typical particle diameter model
Enclose 10-180 microns, 0.1-0.25 grams/cc of bulk density, with light weight, low heat conduction, sound insulation, high dispersive, electric insulation
The advantages of property and heat endurance are good, is a kind of widely used, excellent performance novel light material.
Glass microballoon wetting and dispersing easily, can be filled in most of thermosetting thermoplastic resins, such as polyester, epoxy resin,
Polyurethane etc..High dispersive, good fluidity.Because hollow glass micropearl is microspheres, than sheet, pin in liquid resin
Shape or the filler of irregular shape have more preferable mobility, so mold filling excellent performance.More importantly this small microballon
It is isotropic, therefore the inconsistent disadvantage of different parts shrinkage factor caused by orientation will not be produced, it is ensured that the chi of product
Very little stabilization, will not warpage.
The present invention is coordinated using glass microballoon, cement and Steel-slag Sand, and obtained high performance flowing concrete is not only processed
Process is simple, with good mobility, clearance through, education resistance, meets intensity requirement；And it is easy to the same of construction
When reduce concrete production cost, preparation method is simple, is adapted to industrialized production.
Embodiment 1~16
(1) raw material is prepared：
Cement：PO42.5 Portland cements, apparent density is 3.10g/cm3。
Flyash：I grade of flyash, apparent density 2.04g/cm3。
Glass microballoon：Outsourcing, density is in 0.1-0.25g/cm3。
Sand:Modulus of fineness is 2.36 middle sand, and apparent density is 2.65g/cm3, bulk density is 1.45g/cm3, it is aqueous
Rate is 0.4%.
Natural coarse aggregate：The rubble of 5~20mm continuous size fractions, apparent density is 2.75g/cm3, bulk density is
1.35g/cm3, water absorption rate is 0.45%.
Regenerated coarse aggregate：By the discarded concrete in building waste by sorting, broken and screening, screen out and be less than
After 9.50mm and particle more than 20mm, regenerated coarse aggregate is processed into 10mm~20mm particle diameters section with aggregate size, it is apparent
Density is 2.35g/cm3, bulk density is 1.23g/cm3, water absorption rate is 4.76%.
Steel-slag Sand：Discarded slag is subjected to circulation pulverization process through disintegrating apparatus or milling apparatus to discarded slag, so
Different-grain diameter is sorted by sorting device afterwards, particle diameter 1 μm~15 μm, as steel-making slag powder.Particle diameter is small more than 15 μm
In the particle equal to 50 μm, as Steel-slag Sand；If particle of the particle diameter more than 50 μm, continue to crush.
Additive：High-efficiency water-reducing agent of poly-carboxylic acid.
Water：Running water.
(2) Steel-slag Sand, cement and glass microballoon are mixed thoroughly in advance according to scheduled volume, obtains A material；To prevent viscous pot, weigh
Each material is appropriate, mixing concrete, and machine inwall to be mixed is stained with cement mortar, takes out concrete, and weighing A by match ratio expects, again
Raw coarse aggregate, natural coarse aggregate, water, flyash, feed intake according to the order of regenerated coarse aggregate, natural coarse aggregate, A material, flyash
Then mixer, dry mixing 1min~10min are started；
(3) load weighted water and additional water are added, continues to stir 1min~10min.
The quantitative measurement result of Steel-slag Sand sample such as table 1：
The quantitative measurement result of the Steel-slag Sand sample of table 1
Slag sand self-compacting regeneration concrete coordinates such as table 2：
The slag sand self-compacting regeneration concrete match ratio result of table 2
Cubic compressive strength, peak point, the conversion coefficient test result such as table 3 of slag sand self-compacting regeneration concrete
With table 4：
The quantitative measurement result of the slag sand self-compacting regeneration concrete of table 3
The slump flow test and L-type instrument result of the test of the slag sand self-compacting regeneration concrete of table 4
According to upper table results, it can be seen that obtained C40 level slag sand self-compacting concretes of the invention are in compression strength
Meet existing concrete standard C30.The self-compacting concrete Steel-slag Sand and glass microballoon, are used as yellow ground in self-compacting concrete
Perfect replacement, with good mobility, clearance through, education resistance, meet intensity requirement.While being easy to construction
Concrete production cost is reduced, preparation method is simple, is adapted to industrialized production.
The preferred embodiment of the application is the foregoing is only, the application is not limited to, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made it is any
Modification, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. a kind of C40 grades of slag sand self-compacting concrete, its water-cement ratio is controlled between 0.3~0.7, wherein raw material components are by weight
Amount fraction, which is calculated, to be included：
The parts by weight of Steel-slag Sand 2~10；
The parts by weight of glass microballoon 2~10；
The parts by weight of cement 2~10；
The parts by weight of natural coarse aggregate 7~10；
The parts by weight of regenerated coarse aggregate 2~6；
The parts by weight of sand 2~10；
The parts by weight of flyash 0.5~1.1；
The parts by weight of water 2~10.
2. C40 grades of slag sand self-compacting concrete according to claim 1, wherein,
The particle diameter of Steel-slag Sand is more than 15 μm, and less than or equal to 50 μm, its water absorption rate is 30%~50%.
3. C40 grades of slag sand self-compacting concrete according to claim 1, wherein,
The Steel-slag Sand is to carry out pulverization process to discarded slag through disintegrating apparatus or milling apparatus, then passes through sorting device
Sorting acquisition is carried out to different-grain diameter.
4. C40 grades of slag sand self-compacting concrete according to claim 1, wherein,
The particle diameter of glass microballoon is at 15 μm~50 μm, and its density is in 0.1-0.25g/cm3。
5. C40 grades of slag sand self-compacting concrete according to claim 1, wherein raw material components fraction by weight calculate bag
Include：
The parts by weight of Steel-slag Sand 2~10；
The parts by weight of glass microballoon 2~10；
The parts by weight of cement 2~8；
The parts by weight of natural coarse aggregate 7~10；
The parts by weight of regenerated coarse aggregate 2~6；
The parts by weight of sand 2~10；
The parts by weight of flyash 0.5~1.1；
The parts by weight of water 2~8.
6. C40 grades of slag sand self-compacting concrete according to claim 1, wherein raw material components fraction by weight calculate bag
Include：
The parts by weight of Steel-slag Sand 2~8；
The parts by weight of glass microballoon 2~8；
The parts by weight of cement 2~10；
The parts by weight of natural coarse aggregate 7~10；
The parts by weight of regenerated coarse aggregate 2~6；
The parts by weight of sand 2~10；
The parts by weight of flyash 0.5~1.1；
The parts by weight of water 2~10.
7. C40 grades of slag sand self-compacting concrete according to claim 1, wherein raw material components fraction by weight calculate bag
Include：
The parts by weight of Steel-slag Sand 2~8；
The parts by weight of glass microballoon 2~8；
The parts by weight of cement 2~5；
The parts by weight of natural coarse aggregate 7~10；
The parts by weight of regenerated coarse aggregate 2~6；
The parts by weight of sand 2~10；
The parts by weight of flyash 0.5~1.1；
The parts by weight of water 4~8.
8. C40 grades of slag sand self-compacting concrete according to claim 1, it is characterised in that
The water-cement ratio of the C40 grades of slag sand self-compacting concrete is 0.3~0.65；It is preferred that, the C40 grades of Steel-slag Sand is from close
The water-cement ratio of real concrete is 0.3,0.32,0.54,0.62.
9. a kind of preparation method of the C40 level slag sand self-compacting concretes described in claim 1~8 any one, its feature
It is, the described method comprises the following steps：
(1) Steel-slag Sand, cement and glass microballoon are mixed thoroughly in advance according to scheduled volume, obtains A material；
(2) fed intake and then startup stirring according to the order of preset blending ratio natural coarse aggregate, regenerated coarse aggregate, sand, A material, flyash
Machine, 1~10min of dry mixing；Then add water, continue to stir 1~10min, stir and produce described C40 level Steel-slag Sands from close
Real concrete.
10. the concrete that the C40 level slag sand self-compacting concretes described in a kind of claim 1~8 any one are prepared from
Component.
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