CN109592946A - A kind of ultra-high performance concrete and preparation method thereof for mixing steel slag - Google Patents
A kind of ultra-high performance concrete and preparation method thereof for mixing steel slag Download PDFInfo
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- CN109592946A CN109592946A CN201910035927.1A CN201910035927A CN109592946A CN 109592946 A CN109592946 A CN 109592946A CN 201910035927 A CN201910035927 A CN 201910035927A CN 109592946 A CN109592946 A CN 109592946A
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- Prior art keywords
- steel slag
- ultra
- high performance
- performance concrete
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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
-
- 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 & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of ultra-high performance concretes and preparation method thereof for mixing steel slag.Each material content in every cubic metre of ultra-high performance concrete are as follows: cement: 372.1-620.2kg, steel slag: 62.0-248.1kg, flyash: 141.3-196.3kg, silicon ash: 87.8-131.8kg, quartz sand I: 198.4-297.6kg, quartz sand II: 793.6-1190.4kg, steel fibre: 78.5-235.5kg, water: 127.8-153kg, water-reducing agent: 27-45kg.Steel slag incorporation of the present invention is big, and for steel slag incorporation up to the 30% of cement quality, every cubic metre of ultra-high performance concrete can mix 186kg steel slag；Intensity is high simultaneously, and after steel slag replaces the cement of 30% mass fraction, seven days intensity is more than 150MPa up to 130MPa, 14 days intensity.
Description
Technical field
The invention belongs to field of material technology, specifically design a kind of ultra-high performance concrete for mixing steel slag and its preparation side
Method.
Background technique
According to statistics, the output of steel in China accounts for the 1/5 of world steel industry, and steel slag is the waste residue generated in steelmaking process,
Discharge amount is about the 15% of output of steel, and the discharge amount of the annual steel slag in China is huge；But it is unsatisfactory to the utilization power of steel slag,
What many steel slags were taken is extensive style processing method: about 4,500,000 tons are expected that 1,200,000 tons are used for back for building the road to backfill with engineering
Furnace sintering, only about 500,000 tons, for configuring cement or other construction materials, are evaluated by resource and validity, and China's steel slag is real
Border utilization rate is only 40% or so.The steel slag in Europe 65% has been utilized effectively, and the discharge and utilization of U.S.'s steel slag are basic
Reach balance.The a large amount of steel slag in China, which is stacked, to be shelved, and the steel slag accumulated at present reaches 300,000,000 tons or more, while occupying cultivated land
Cause serious water pollution and soil pollution.Therefore the utilization rate for improving steel slag is extremely urgent.China discharge steel slag 70% with
Upper is converter slag, and the chemical composition of converter slag and mineral composition are closer to Portland clinker, thus theoretically
Analysis, application of the steel slag in cement concrete should have great potentialities.
Summary of the invention
Present invention aims at steel slag is mixed replacing partial cement in ultra-high performance concrete, increase utilization rate of steel slag,
The quality of ultra-high performance concrete is improved, while reducing ultra-high performance concrete cost, while obtaining economic benefit, harvest
Environmental benefit.
In order to achieve the above objectives, as follows using technical solution:
A kind of ultra-high performance concrete for mixing steel slag, each material content in every cubic metre of ultra-high performance concrete are as follows:
Cement: 372.1-620.2kg, steel slag: 62.0-248.1kg, flyash: 141.3-196.3kg, silicon ash: 87.8-
131.8kg, quartz sand I: 198.4-297.6kg, quartz sand II: 793.6-1190.4kg, steel fibre: 78.5-235.5kg, water:
127.8-153kg, water-reducing agent: 27-45kg.
Optimally, the above-mentioned ultra-high performance concrete for mixing steel slag, each material content in every cubic metre of ultra-high performance concrete
Are as follows:
Cement: 434.1kg, steel slag: 186.0kg, flyash: 164.9kg, silicon ash: 114.2kg, quartz sand I:
244.4kg, quartz sand II: 977.6kg, steel fibre: 157kg, water: 140.3kg, water-reducing agent: 36kg.
According to the above scheme, in steel slag main component percentage composition are as follows: Al2O3: 4%-6%；SiO2: 15%-25%；
CaO:30%-60%；Fe2O3: 12%-16%.
According to the above scheme, the partial size D50 of cementitious material used is respectively as follows: cement: 7-11 μm；Steel slag: 6-9 μm；Flyash:
10-15μm。
According to the above scheme, the steel slag is converter slag, wherein free calcium oxide content≤3wt%, metal Ferrum content≤
2wt%, specific surface area >=300m of the steel-making slag powder2/kg。
According to the above scheme, the portland cement is the ordinary portland cement of strength grade 52.5.
According to the above scheme, the flyash is level-one ash.
According to the above scheme, the quartz sand I and II partial size of quartz sand are respectively 100-700 μm and 300-1100 μm；It uses
Constantly quartz sand I and the 1:4 in mass ratio of quartz sand II are used in mixed way.
The water-reducing agent is the compound water-reducing agent that polycarboxylic acid series high efficiency water reducing agent and sodium citrate retarder mix.
The preparation method of the above-mentioned ultra-high performance concrete for mixing steel slag, comprising the following steps:
Silicon ash, quartz sand I and quartz sand II mix dry mixing three minutes；
Addition cement, flyash and steel slag dry mixing two minutes；
Mixed uniformly water and water-reducing agent is added, stirs three minutes；
Steel fibre is added to stir two minutes.
Steel slag component is unstable, and the factors such as volume stability difference limit extensive use of the steel slag as mineral admixture,
But in ultra-high performance concrete of the present invention, these restriction effects influence smaller.Cement content is very in ultra-high performance concrete
Height, still there are a large amount of unhydrated particles in the aquation later period, therefore the introducing of steel slag is to cause as filler particles so component is unstable
Impact effect it is faint；On the other hand, ultra-high performance concrete water-cement ratio is extremely low, compact structure, and itself self-constriction phenomenon is aobvious
It writes, therefore Volumetric expansion caused by the introducing of steel slag is restricted, and the part that on the other hand can compensate matrix is received
Contracting.Therefore compared to normal concrete, application of the steel slag in ultra-high performance concrete has more advantage, and the introducing of steel slag can be with
The working performance for improving ultra-high performance concrete, reduces the cost of ultra-high performance concrete.
The ultra-high performance concrete for mixing steel slag of the invention has the advantage that
1, steel slag incorporation is big.For steel slag incorporation up to the 30% of cement quality, every cubic metre of ultra-high performance concrete can
To mix 186kg steel slag.
2, intensity is high.After steel slag replaces the cement of 30% mass fraction, seven days intensity is up to 130MPa, 14 days intensity
More than 150MPa.Reach the index request of ultra-high performance concrete.
3, good fluidity.The fluidity for not mixing the ultra-high performance concrete of steel slag is 200mm, when steel slag content is 30%
When, ultra-high performance concrete fluidity is 235mm.
4. the very-high performance self-constriction that steel slag is not mixed in the self-constriction that ultra-high performance concrete is effectively reduced is 400, work as steel slag
When replacing 30% mass fraction cement, the self-constriction of ultra-high performance concrete is reduced to 285.
5. the cost of ultra-high performance concrete is effectively reduced, when not mixing steel slag, the steel of every incorporation cement quality score 30%
Slag can reduce by 300 yuan of cost.
Specific embodiment
Following embodiment further illustrates technical solution of the present invention, but not as limiting the scope of the invention.
Embodiment 1
Each component is uniformly mixed by following proportion and the ultra-high performance concrete for mixing steel slag of the invention is made:
Embodiment 2
Each component is uniformly mixed by following proportion and the ultra-high performance concrete for mixing steel slag of the invention is made:
Embodiment 3
Each component is uniformly mixed by following proportion and the ultra-high performance concrete for mixing steel slag of the invention is made:
Embodiment 4
Each component is uniformly mixed by following proportion and the ultra-high performance concrete for mixing steel slag of the invention is made:
Embodiment 5
Each component is uniformly mixed by following proportion and the ultra-high performance concrete for mixing steel slag of the invention is made:
The correlated performance comparison of the product of above embodiments is as shown in table 1.
The working performance of ultra-high performance concrete is referring in " flow of cement mortar test method " (GB/T2419-2005)
Defined method carries out.
Mechanics Performance Testing carries out resistance to compression, flexural strength according to GB/T17671-1999 " Test method for strength of hydraulic cement mortar "
Test.It is seven days intensity of product.
The Schleibinger that contraction strain test apparatus is produced using GermanyInstrument is continuously measured, institute
Taking strain value is the numerical value after stablizing for 21 days.
Table 1
| Fluidity (mm) | Flexural strength (MPa) | Compression strength (MPa) | Contraction strain | |
| Embodiment 1 | 210 | 56.8 | 148 | 390 |
| Embodiment 2 | 230 | 35.3 | 108.3 | 260 |
| Embodiment 3 | 225 | 31.8 | 117 | 570 |
| Embodiment 4 | 235 | 41.9 | 130 | 285 |
| Embodiment 5 | 240 | 36.6 | 115.3 | 263 |
Claims (10)
1. a kind of ultra-high performance concrete for mixing steel slag, it is characterised in that each material content in every cubic metre of ultra-high performance concrete
Are as follows:
Cement: 372.1-620.2kg, steel slag: 62.0-248.1kg, flyash: 141.3-196.3kg, silicon ash: 87.8-
131.8kg, quartz sand I: 198.4-297.6kg, quartz sand II: 793.6-1190.4kg, steel fibre: 78.5-235.5kg, water:
127.8-153kg, water-reducing agent: 27-45kg.
2. a kind of ultra-high performance concrete for mixing steel slag, it is characterised in that each material content in every cubic metre of ultra-high performance concrete
Are as follows:
Cement: 434.1kg, steel slag: 186.0kg, flyash: 164.9kg, silicon ash: 114.2kg, quartz sand I: 244.4kg, stone
Sand II: 977.6kg, steel fibre: 157kg, water: 140.3kg, water-reducing agent: 36kg.
3. mixing the ultra-high performance concrete of steel slag as claimed in claim 1 or 2, it is characterised in that the percentage of main component in steel slag
Content are as follows: Al2O3: 4%-6%；SiO2: 15%-25%；CaO:30%-60%；Fe2O3: 12%-16%.
4. mixing the ultra-high performance concrete of steel slag as claimed in claim 1 or 2, it is characterised in that the partial size of cementitious material used
D50 is respectively as follows: cement: 7-11 μm；Steel slag: 6-9 μm；Flyash: 10-15 μm.
5. mixing the ultra-high performance concrete of steel slag as claimed in claim 1 or 2, it is characterised in that the steel slag is converter slag,
Wherein free calcium oxide content≤3wt%, metal Ferrum content≤2wt%, specific surface area >=300m of the steel-making slag powder2/kg。
6. mixing the ultra-high performance concrete of steel slag as claimed in claim 1 or 2, it is characterised in that the portland cement is intensity
The ordinary portland cement of class 5 2.5.
7. mixing the ultra-high performance concrete of steel slag as claimed in claim 1 or 2, it is characterised in that the flyash is level-one ash.
8. mixing the ultra-high performance concrete of steel slag as claimed in claim 1 or 2, it is characterised in that the quartz sand I and quartz sand
II partial size is respectively 100-700 μm and 300-1100 μm；Made using constantly quartz sand I and the 1:4 in mass ratio of quartz sand II mixing
With.
9. mixing the ultra-high performance concrete of steel slag as claimed in claim 1 or 2, it is characterised in that water-reducing agent is polycarboxylic-acid diminishing
The compound water-reducing agent that agent and sodium citrate retarder mix.
10. the preparation method of the ultra-high performance concrete as claimed in claim 1 or 2 for mixing steel slag, comprising the following steps:
Silicon ash, quartz sand I and quartz sand II mix dry mixing three minutes；
Addition cement, flyash and steel slag dry mixing two minutes；
Mixed uniformly water and water-reducing agent is added, stirs three minutes；
Steel fibre is added to stir two minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910035927.1A CN109592946A (en) | 2019-01-15 | 2019-01-15 | A kind of ultra-high performance concrete and preparation method thereof for mixing steel slag |
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| CN201910035927.1A CN109592946A (en) | 2019-01-15 | 2019-01-15 | A kind of ultra-high performance concrete and preparation method thereof for mixing steel slag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112358220A (en) * | 2020-11-10 | 2021-02-12 | 安徽成弘建新材料有限公司 | Water-reducing type steel slag modifier and preparation method and application thereof |
| CN115304312A (en) * | 2022-08-01 | 2022-11-08 | 武汉理工大学 | Steel slag aggregate ultrahigh-strength heavy concrete and preparation method thereof |
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| CN104556881A (en) * | 2015-01-19 | 2015-04-29 | 黄政宇 | Ultrahigh-toughness concrete and preparation method thereof |
| CN107265983A (en) * | 2017-08-08 | 2017-10-20 | 天津城建大学 | A kind of 180MPa ultra-high performance concretes and preparation method thereof |
| CN108191351A (en) * | 2018-03-08 | 2018-06-22 | 同济大学 | A kind of ultra-high performance concrete for mixing assorted fibre |
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2019
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Patent Citations (4)
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| CN107265983A (en) * | 2017-08-08 | 2017-10-20 | 天津城建大学 | A kind of 180MPa ultra-high performance concretes and preparation method thereof |
| CN108191351A (en) * | 2018-03-08 | 2018-06-22 | 同济大学 | A kind of ultra-high performance concrete for mixing assorted fibre |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112358220A (en) * | 2020-11-10 | 2021-02-12 | 安徽成弘建新材料有限公司 | Water-reducing type steel slag modifier and preparation method and application thereof |
| CN115304312A (en) * | 2022-08-01 | 2022-11-08 | 武汉理工大学 | Steel slag aggregate ultrahigh-strength heavy concrete and preparation method thereof |
| CN115304312B (en) * | 2022-08-01 | 2023-09-19 | 武汉理工大学 | Steel slag aggregate ultra-high-strength heavy concrete and preparation method thereof |
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