CN106747051A - C20 grades is mixed slag regeneration aggregate self-compacting concrete and preparation method thereof - Google Patents
C20 grades is mixed slag regeneration aggregate self-compacting concrete and preparation method thereof Download PDFInfo
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- CN106747051A CN106747051A CN201611035313.6A CN201611035313A CN106747051A CN 106747051 A CN106747051 A CN 106747051A CN 201611035313 A CN201611035313 A CN 201611035313A CN 106747051 A CN106747051 A CN 106747051A
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- Prior art keywords
- slag
- compacting concrete
- self
- aggregate
- concrete
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
Abstract
Slag regeneration aggregate self-compacting concrete and preparation method thereof is mixed the invention discloses a kind of C20 grades, described C20 grades mixes slag regeneration aggregate self-compacting concrete, by mass fraction by raw material：Water is 1 part, and natural coarse aggregate is 3.089 parts, and regenerated coarse aggregate is 1.322 parts, fine aggregate is 3.822 parts, and cement is 0.970~0.1.213 parts, and slag is 1.213~1.455 parts, flyash is 0.609 part, and additional water is 0.064 part, and additive is 0.00495 part~0.0124 part composition.Concrete of the invention has good mobility, fillibility, education resistance, and gradual loss and intensity are satisfied by building related request, preparation method is simple simultaneously, reduce the production cost of self-compacting concrete on year-on-year basis with intensity, also solve the problem of slag and building waste treatment, alleviate the pressure of resource exhaustion, environmental protection is adapted to industrialized production.
Description
Technical field
The present invention relates to a kind of building material technical field, and in particular to a kind of C20 grades is mixed slag regeneration aggregate self-compaction
Concrete and preparation method thereof.
Background technology
Self-compacting concrete (Self Compacting Concrete or Self-Consolidating Concrete letters
Claim SCC) refer to by self-gravity action without additional machinery vibrate power effect, can just have enough flowing and deformabilities,
Even if being also able to filling template space in the presence of fine and close reinforcing bar and forming the concrete of packed uniform.Prepare self-compacting concrete general
Selection and collocation and meticulous mix-design by additive, Binder Materials and coarse-fine aggregate, should by the surrender of concrete
Power is reduced to the shear stress for being enough to be conducted oneself with dignity generation and overcomes so that concrete flowability increases, while having enough plasticity again
Viscosity, makes aggregate be suspended in cement mortar, occurs without isolation and bleeding problem, can freely trickle and be sufficient filling with the sky in template
Between, form closely knit and uniform jelling structure.With Building Trade in China high speed development, and labour shortage, China for
Self-compacting concrete demand is stepped up, therefore self-compacting concrete has a extensive future in China's building trade.
As China's output of steel maintains sustained and rapid growth, the production of steel can produce the slag of pollution environment；Building makes in itself
Cause the substantial amounts of building waste cannot to process with life-span and the shortening for building the cycle of tearing open.The research of steel-making slag powder is concentrated mainly on and utilizes steel
Ground-slag substitutes cement and prepares normal concrete, and is concentrated mainly in regeneration aggregate research and is processed into regeneration using discarded concrete
Coarse aggregate substitutes part natural coarse aggregate and prepares regeneration concrete.Although the self-compacting concrete for preparing at present meets constructing and strong
Degree is required, but cost is higher, therefore substitutes cement and natural thick bone using the double solid waste material of slag and regenerated coarse aggregate
Material prepares self-compacting concrete, can reduce the production cost of self-compacting concrete, and self-compacting concrete is that one kind is different from
The high performance concrete of normal concrete, does not isolate, not bleeding, Neng Gouwu with mobility very high and in casting process
Need machinery vibrate power effect and be full of the concrete of template and parcel reinforcing bar, to prepare regeneration concrete and slag mixed while existing
Solidifying soil technology can not solve the present situation of artificial shortage.
The content of the invention
The object of the invention be directed to prior art presence problem and defect, there is provided it is a kind of with good mobility, fill out
Filling property, education resistance, and gradual loss and intensity is satisfied by building C20 the grade of related request to mix slag regeneration aggregate self-compaction mixed
Solidifying soil and preparation method thereof.
The present invention is about 60 yuan/m using the unit price that gained regeneration aggregate is processed into building waste recovery3(containing processing charges),
And the unit price of natural aggregate is about 90 yuan/m3, calculated by 30% Replacement rate of regeneration aggregate substitution natural aggregate, then mix slag again
Raw aggregate self-compacting concrete has saved about 8.2 yuan/m because of regeneration aggregate3；Gained steel-making slag powder list is processed into using steel-making waste residue
Valency is about 110 yuan/t (containing processing charges), and the unit price of cement is about 330 yuan/t, and every cubic metre of slag replaces the Replacement rate of cement
Calculated according to 55%, then mix slag regeneration aggregate self-compacting concrete and about 27.995 yuan/m has been saved because of slag3.Match somebody with somebody identical
Under the conditions of composition and division in a proportion, mix slag regeneration aggregate self-compacting concrete can direct saving material cost be about 36.195 yuan/m3.Simultaneously should
The C20 grades of preparation method for mixing slag regeneration aggregate self-compacting concrete is simple, reduces the self-compacting concrete on year-on-year basis with intensity
Production cost, can also solve the problems, such as slag and building waste treatment, alleviate resource exhaustion pressure, environmental protection, system
Standby scheme is simple, is adapted to industrialized production.
To reach above-mentioned purpose, the technical scheme is that：
A kind of C20 grades is mixed slag regeneration aggregate self-compacting concrete, by mass fraction by raw material：Water is 1 part, natural thick bone
Expect to be 3.089 parts, regenerated coarse aggregate is 1.322 parts, fine aggregate is 3.822 parts, and cement is 0.970~0.1.213 parts, and slag is
1.213~1.455 parts, flyash is 0.609 part, and additional water is 0.064 part, and additive is 0.00495 part~0.0124 part group
Into.
Further, slag described above is by weight percent to contain 15.9% MgO, the steel-making of storage more than 6 months
Waste residue, through except iron, ball milling, screening, obtaining steel-making slag powder of the particle diameter less than 0.08mm.The apparent density of the slag is 2.36g/cm3,
Basicity factor is 1.99.Slag other Testing index meet《For the steel-making slag powder in cement and concrete》GB/T 20491-
2006 standards.
The slag main chemical compositions (%) are as shown in table 1 below：
Further, regenerated coarse aggregate described above is the discarded concrete containing brickbat, mortar block, sorted, broken, sieve
Point, obtain the continuous grading regenerated coarse aggregate that particle diameter is 5~20mm.The apparent density of the regenerated coarse aggregate is 2.60g/cm3, heap
Product density is 1.20g/cm3, water absorption rate is 4.75%.
Further, it is the continuous grading metaling of 5~20mm that natural coarse aggregate described above uses particle diameter.It is described natural thick
The apparent density of aggregate is 2.87g/cm3, bulk density is 1.53g/cm3, water absorption rate is 0.54%.
Further, fine aggregate described above is river sand, and IIth area level matches somebody with somebody, any one in middle sand.
Further, additive described above is high-efficiency polycarboxylic acid water reducer that water-reducing rate is 25%.
Further, cement described above is PO42.5 portland cements.
Further, flyash described above is I grade of flyash.
To reach above-mentioned purpose, technology of preparing scheme of the invention is：
A kind of C20 grades preparation method for mixing slag regeneration aggregate self-compacting concrete, comprises the following steps：
Step 1, the cement, natural coarse aggregate, regenerated coarse aggregate, thin bone are weighed according to the parts by weight of each raw material components
Material, slag, flyash, water, additional water and high-efficiency polycarboxylic acid water reducer；
Step 2, in order successively by load weighted natural coarse aggregate, regenerated coarse aggregate, fine aggregate, cement, flyash and
Slag is put into inwall and is evenly coated with the mixer of concrete membrane, and 2~3mins is stirred with 45 revs/min of startup mixers；
Step 3, load weighted water and additional water are added, continued with 45 revs/min of 2~3mins of stirring；
Step 4, the high-efficiency polycarboxylic acid water reducer that will be weighed up are added in mixer in six times, often plus once, start stir immediately
Mix machine to stir 1 minute, until continuing to stir 3mins after last time is added, that is, obtain C20 grades and mix slag regeneration aggregate self-compaction
Concrete
The present invention prepares high-performance regeneration aggregate certainly using slag, regenerated coarse aggregate replacing partial cement and natural coarse aggregate
Air-free concrete is for three purposes：
One is, large-scale steel production has resulted in ambient influnence with the generation of slag, solves what slag was brought
Problem is already a problem for national economy sustainable development；
Two are, reduce manufacture of cement, so as to reduce the discharge of carbon dioxide, are conducive to atmospheric environment protection；
Three are, will be recycled with brickbat, the building waste of the discarded concrete of mortar block, meet green building material
The requirement of material.It is current little on the research using slag and double solid waste material of regenerated coarse aggregate, therefore slag is mixed in preparation
Regeneration aggregate self-compacting concrete can not only solve discarded slag and environment and social concern caused by building waste, also
Certain economic benefit, and implemented country economize on resources, the techno-economic policy of green production.
Specific embodiment
Such scheme is described further below in conjunction with specific embodiment.It should be understood that these embodiments are for illustrating
The present invention and be not limited to the scope of the present invention.The implementation condition used in embodiment can be done into one according to the condition of specific producer
Successive step, unreceipted implementation condition is usually the condition in routine test.
Embodiment 1
A kind of C20 grades is mixed slag regeneration aggregate self-compacting concrete, by mass fraction by raw material：Water is 1 part, natural thick bone
Expect to be 3.089 parts, regenerated coarse aggregate is 1.322 parts, fine aggregate is 3.822 parts, and cement is 0.970~0.1.213 parts, and slag is
1.213~1.455 parts, flyash is 0.609 part, and additional water is 0.064 part, and additive is 0.00495 part~0.0124 part group
Into.
Used as the further preferred of this programme, slag described above is by weight percent to contain 15.9% MgO.
Used as the further preferred of this programme, the regenerated coarse aggregate is the discarded concrete containing brickbat, mortar block, warp
Sorting, broken, screening, obtain the continuous grading regenerated coarse aggregate that particle diameter is 5~20mm.
Used as the further preferred of this programme, it is the continuous grading rubble of 5~20mm that the natural coarse aggregate uses particle diameter
Material.
Used as the further preferred of this programme, the fine aggregate is river sand, and IIth area level matches somebody with somebody, any one in middle sand.
Used as the further preferred of this programme, the additive is high-efficiency polycarboxylic acid water reducer that water-reducing rate is 25%.
Used as the further preferred of this programme, the cement is PO42.5 portland cements.
Used as the further preferred of this programme, the flyash is I grade of flyash.
Embodiment 2
The C20 grades of preparation method for mixing slag regeneration aggregate self-compacting concrete, it is characterised in that comprise the following steps
(1) raw material is prepared
Cement：PO42.5 Portland cements, apparent density is 3.20g/cm3。
Flyash：I grade of flyash, apparent density is 2.42g/cm3。
Fine aggregate：Modulus of fineness is 2.4 medium-sized river sands, and bulk density is 1.54g/cm3, apparent density is 2.64g/cm3,
Moisture content is 0.35%.
Slag：The steel-making waste residue of more than 6 months has been placed after except iron, ball milling and screening by steel mill, chooses particle diameter and is less than
The steel-making slag powder of 0.08mm, apparent density is 2.36g/cm3, slag basicity factor is that 1.99, MgO mass percents are 15.9%,
Slag other Testing index meet《For the steel-making slag powder in cement and concrete》GB/T 20491-2006 standards.
Natural coarse aggregate：5~20mm continuous grading metalings, apparent density is 2.87g/cm3, bulk density is 1.53g/
cm3, water absorption rate is 0.54%.
Regenerated coarse aggregate：By the discarded concrete containing brickbat, mortar block in building waste by sorting, broken and sieve
Point, after screening out the particle less than 4.75mm and more than 20mm, the thick bone of regeneration is processed into 5~20mm particle diameters section with aggregate size
Material, apparent density is 2.60g/cm3, bulk density is 1.20g/cm3, water absorption rate is 4.75%.
Additive：High-efficiency polycarboxylic acid water reducer.
Water and additional water：Running water.
(2) to prevent viscous pot, ready-mixed concrete is carried out according to the parts by weight of each raw material components, consumption holds according to mixer
Product determines that wherein the amount of ready-mixed concrete will can guarantee that and for mixer inwall be uniformly coated with cement mortar thin layer, in machine to be mixed
After wall coats cement mortar thin layer, residual concrete is taken out；
(3) cement, natural coarse aggregate, regenerated coarse aggregate, fine aggregate, steel are weighed according to the parts by weight of each raw material components
Slag, flyash, water, additional water and additive；Inwall is stated then up to be evenly coated with the mixer of concrete membrane by suitable
Sequence sequentially adds load weighted natural coarse aggregate, regenerated coarse aggregate, fine aggregate, cement, flyash and slag, then starts and stirs
The machine of mixing carries out dry mixing 2mins, it is ensured that each material component mix is uniform, if mixer volume is larger, can with proper extension dry mixing when
Between；
(4) load weighted water and additional water are added, continues to stir 2~3mins；
(5) the last high-efficiency water-reducing agent of poly-carboxylic acid that will be weighed up again adds mixer several times, often plus once, starts stir immediately
Mix machine to stir 1 minute, and note observing the mobility of mixture, until continuing to stir 3mins after last time is added, that is, obtain
C20 grades is mixed slag regeneration aggregate self-compacting concrete.
C20 grades to mix slag regeneration aggregate self-compacting concrete embodiment match ratio as shown in table 2 below：
C20 grades to mix slag regeneration aggregate self-compacting concrete embodiment measure of merit data as shown in table 3 below：
It is an advantage of the invention that：
1. C20 grades of present invention production mixes slag regeneration aggregate self-compacting concrete, and material used removes normal concrete
Outside the cement that uses, stone, four kinds of raw materials of sand and water, also including flyash, the placement more than 6 months as long as having removed iron it is discarded
Slag reaches the company of the steel-making slag powder of cement level degree, the discarded concrete containing brickbat and mortar block through broken screening after ball milling
Continuous level matches somebody with somebody regenerated coarse aggregate and high-efficiency polycarboxylic acid water reducer, the prepared flowing for mixing slag regeneration aggregate self-compacting concrete
Property, fillibility, education resistance, gradual loss and intensity are satisfied by related request；
2. the present invention is using reaching cement level degree replacing partial cement (10%~20%) after steel-making waste residue ball milling, using containing
There is brickbat, the discarded concrete of mortar block substitutes part natural coarse aggregate (30%) and prepare and mixes as continuous grading regenerated coarse aggregate
The method of slag regeneration aggregate self-compacting concrete, can effectively solve the discarded slag of steel mill's generation, reduce building waste, alleviate
The pressure of resource exhaustion, environmental protection economizes on resources, and reduces the production cost of self-compacting concrete on year-on-year basis with intensity, symbol
The theory of national sustainable development is closed, is adapted to industrialized production.
3. the present invention has relatively low gradual loss rate, and initial slump flow test average value is 740mm, and J ring divergences are
715, it is 620mm by slump flow test average value after 90mins, J rings divergence regenerates to mix slag after 575mm, i.e. 90min
Aggregate self-compacting concrete remains unchanged certain mobility, can now add 0.15% high-efficiency polycarboxylic acid water reducer, slump flow test
730mm can be returned to, J rings divergence is 695mm.
4. cubic compressive strength test of the present invention has the strength factor of assurance higher in more than 23MPa.Current China gives up
About 1.5 hundred million tons of slag is abandoned, discarded concrete is at least up to 2.5 hundred million tons, and this data also is continuing to rise.These solids give up
Rejected material has generated the environmental pressure of sternness.The present invention realizes regeneration to double solid waste material, improves concrete
Greenness, can directly contribute for energy-saving and emission-reduction are produced.
Examples detailed above technology design and feature only to illustrate the invention, its object is to allow person skilled in the art to be
Will appreciate that present disclosure and implement according to this, it is not intended to limit the scope of the present invention.It is all smart according to the present invention
Equivalent transformation or modification that refreshing essence is done, should all be included within the scope of the present invention.
Claims (8)
1. slag regeneration aggregate self-compacting concrete is mixed a kind of C20 grades, by mass fraction by raw material：Water is 1 part, natural coarse aggregate
It it is 3.089 parts, regenerated coarse aggregate is 1.322 parts, fine aggregate is 3.822 parts, and cement is 0.979~0.1293 part, and slag is
1.313~1.655 parts, flyash is 0.609 part, and additional water is 0.064 part, and additive is 0.00495 part~0.0124 part group
Into.
2. slag regeneration aggregate self-compacting concrete is mixed C20 grades according to claim 1, it is characterised in that the slag
It is by weight percent to contain 15.9% MgO, the steel-making waste residue of storage more than 6 months, through except iron, ball milling, screening, obtaining particle diameter
Steel-making slag powder less than 0.08mm.
3. C20 grades according to right 1 mixes slag regeneration aggregate self-compacting concrete, it is characterised in that the thick bone of regeneration
Material is the discarded concrete containing brickbat, mortar block, sorted, broken, screening, obtains continuous grading that particle diameter is 5~20mm again
Raw coarse aggregate.
4. C20 grades according to right 1 mixes slag regeneration aggregate self-compacting concrete, it is characterised in that the natural thick bone
It is the continuous grading metaling of 5~20mm that material uses particle diameter.
5. C20 grades according to right 1 mixes slag regeneration aggregate self-compacting concrete, it is characterised in that the fine aggregate is
River sand, IIth area level matches somebody with somebody, any one in middle sand.
6. C20 grades according to right 1 mixes slag regeneration aggregate self-compacting concrete, it is characterised in that the additive is
Water-reducing rate is 25% high-efficiency polycarboxylic acid water reducer.
7. C20 grades according to right 1 mixes slag regeneration aggregate self-compacting concrete, it is characterised in that the cement is P
O42.5 portland cements.
8. C20 grades according to right 1 mixes slag regeneration aggregate self-compacting concrete, it is characterised in that the flyash is I
Level flyash.
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| CN201611035313.6A CN106747051A (en) | 2016-11-23 | 2016-11-23 | C20 grades is mixed slag regeneration aggregate self-compacting concrete and preparation method thereof |
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| CN201611035313.6A CN106747051A (en) | 2016-11-23 | 2016-11-23 | C20 grades is mixed slag regeneration aggregate self-compacting concrete and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110357538A (en) * | 2019-08-01 | 2019-10-22 | 西安新意达建筑制品有限公司 | A kind of regeneration self-compacting concrete and preparation method thereof |
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| CN103086667A (en) * | 2013-01-15 | 2013-05-08 | 北方工业大学 | Design method for mixing proportion of C20, C40 and C60 grade high-performance recycled concrete |
| CN104108914A (en) * | 2014-07-01 | 2014-10-22 | 江苏科技大学 | C20-grade single-gradation self-compacting regenerated concrete and preparation method thereof |
| CN104829178A (en) * | 2015-04-21 | 2015-08-12 | 江苏德丰建设集团有限公司 | C30 grade steel-doped slag recycled aggregate self compacting concrete and preparation method thereof |
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| CN103086667A (en) * | 2013-01-15 | 2013-05-08 | 北方工业大学 | Design method for mixing proportion of C20, C40 and C60 grade high-performance recycled concrete |
| CN104108914A (en) * | 2014-07-01 | 2014-10-22 | 江苏科技大学 | C20-grade single-gradation self-compacting regenerated concrete and preparation method thereof |
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| CN110357538A (en) * | 2019-08-01 | 2019-10-22 | 西安新意达建筑制品有限公司 | A kind of regeneration self-compacting concrete and preparation method thereof |
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