CN101519284B - Application of blast furnace slag as the fine aggregate to the concrete preparation - Google Patents
Application of blast furnace slag as the fine aggregate to the concrete preparation Download PDFInfo
- Publication number
- CN101519284B CN101519284B CN2009100615537A CN200910061553A CN101519284B CN 101519284 B CN101519284 B CN 101519284B CN 2009100615537 A CN2009100615537 A CN 2009100615537A CN 200910061553 A CN200910061553 A CN 200910061553A CN 101519284 B CN101519284 B CN 101519284B
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- CN
- China
- Prior art keywords
- concrete
- blast furnace
- fine aggregate
- sand
- slag
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to an application of blast furnace slag as the fine aggregate to the concrete preparation. The blast furnace slag is taken as the fine aggregate to fully replace the sand in thecommon concrete in the prior art to prepare the concrete meeting various strength grades. The components of the traditional concrete comprise water, cement, fine aggregate (sand), coarse aggregate (stone), admixture (fly ash or mineral fines), external reactant, and the like. The blast furnace slag is taken as the fine aggregate to replace the sand in the traditional concrete to prepare the concrete with various strength grades, and the production cost of the concrete can be reduced.
Description
Technical field
The present invention relates to blast furnace granulated slag as the application of fine aggregate in the preparation concrete.
Background technology
China is vast in territory, is used for the local material of concrete batching, can not all meet the technical requirement of relevant criterion, standard defined, as regular concrete sand, stone etc.In China some areas, sand of poor quality only produced fine sand, or even special fine sand (fineness modulus is 0.7-1.5), is difficult to satisfy the concrete design requirements, and from other places fortune sand, the sand source is nervous especially, certainly will increase concrete production cost.
Blast furnace granulated slag is that what to produce in the blast furnace ironmaking process is the waste residue of main component with silicate and silico-aluminate.Matrix in the iron ore and the ash in the coke grade and Wingdale generates blast furnace granulated slag in blast furnace.Blast furnace granulated slag proportion is little, floats on the molten iron surface.Approximately produce 1 ton of pig iron, produce 0.3 ton of grain slag simultaneously.
The applicant is when studying blast furnace granulated slag, and the blast furnace granulated slag of unexpected discovery Iron industry output can substitute the fine aggregate in the existing concrete fully, can reduce concrete production cost simultaneously.
Summary of the invention
Problem to be solved by this invention provides a kind of blast furnace granulated slag as the application of fine aggregate in the preparation concrete, and the alternative existing fine aggregate of blast furnace granulated slag is prepared the concrete of various strength grades, and can reduce concrete production cost.
Technical scheme provided by the invention is: blast furnace granulated slag substitutes the application of sand in concrete batching as fine aggregate.
Described blast furnace granulated slag is that unit weight is greater than 800kg/m
3And less than 1600kg/m
3Grain slag, and do not contain iron filings impurity.
Described concrete moiety is 7-9wt% water, 10-20wt% cement, 19-26wt% blast furnace granulated slag, 46-53wt% coarse aggregate, 1.5-3.0wt% flyash, 1-2wt% breeze and 0.15-0.30wt% admixture etc.
Blast-furnace slag is used for concrete as a kind of adulterant in the prior art, improves concrete density and water-retentivity, improves concrete performance effectively, improves concrete serviceability.The present invention replaces the sand in the prior art normal concrete to prepare the concrete that satisfies various strength grades as fine aggregate blast-furnace slag fully.
The moiety of conventional concrete is water, cement, fine aggregate (sand), coarse aggregate (stone), adulterant (flyash or breeze), admixture etc., the present invention substitutes sand in the conventional concrete with blast furnace granulated slag as fine aggregate, prepare the concrete of various strength grades, and can reduce concrete production cost.
Embodiment
One. the selection of concrete raw material
1. the dominant ideas selected of concrete raw material
(1) grain slag: blast furnace granulated slag is that unit weight is greater than 800kg/m
3And less than 1600kg/m
3Grain slag, fineness modulus is 1.8-3.3, and does not contain iron filings impurity.
(2) adulterant (flyash and breeze): in concrete, mix a certain amount of flyash or breeze, make hydrated reaction of cement more abundant, improve concrete density and water-retentivity, reduce bleeding and segregation phenomenon, thereby improved the concrete performance of grain slag effectively.
(3) coarse aggregate: identical with the coarse aggregate of normal concrete.
(4) admixture: high efficiency water reducing agent, to satisfy high slump and pumping concrete construction requirement.
2. the check of the every index of grain slag
Carry out every detection by GB/T14684-2001 " building sand " inspecting standard.
(1) grain slag Sieve Analysis Test, its fineness modulus are 2.2-2.8, and the grain composition test-results sees Table one.
Table one
(2) silt content of grain slag and clod content are zero substantially.
(3) loose bulk density of grain slag is 970kg/m
3, tightly packed density is 1120kg/m
3
Two. the test of grain slag mix Design
Water-cement ratio, adulterant volume, grain slag rate (with reference to the definition of sand coarse aggregate ratio, the grain slag rate refers to that grain slag accounts for the weight ratio of grain slag and coarse aggregate summation) are grain slag mix Design main experiment parameters.
1. test design thinking:
Utilize blast furnace granulated slag to substitute fine aggregate in the concrete fully, make the concrete requirement of satisfying various strength grades according to a conventional method, and the grain slag concrete is along with the variation of water-cement ratio, strength change laws is basic consistent with the Strength of Common variation.Compare according to the density value of grain slag and the density value of sand, its volume to weight ratio is 0.69: 1.
2. test combinations condition:
(1) water-cement ratio: 0.40,0.45,0.50,0.55.
(2) doping quantity of fly ash: 15%.
(3) contents of ground slag: 10%.
(4) water reducer volume: 1.0%.
(5) slump: 160-200mm.
3. test-results
(1) concrete molding parameter sees Table two.
(2) the mechanical performance of concrete detected result sees Table three.
The concrete molding parameter table of grain slag
Unit: kg/m
3Table two
Grain slag mechanical performance of concrete detected result table
Table three
(3) the concrete anti-permeability performance test of grain slag
Test is with reference to anti-permeability performance tentative specification among " Standard for test methods of longterm performance and durability of ordinary concrete " (GBJ 82-85), adopt end face diameter 175mm, bottom surface diameter 185mm, highly be the Rotary-table test specimen of 150mm, in moulding form removal after 24 hours, and brush away both ends of the surface cement serous coat with wire brush, send into the standard curing room maintenance then and carry out impermeability test, test-results such as table four length of time to 28d:
Grain slag concrete impermeability detected result table four
| Numbering | Maximum hydraulic pressure value (MPa) when seeping water does not appear in 4 test specimens | Impervious grade | Numbering | Maximum hydraulic pressure value (MPa) when seeping water does not appear in 4 test specimens | Impervious grade |
| B1 | 1.0 | P8 | B5 | 1.1 | P10 |
| B2 | 1.0 | P8 | B6 | 1.3 | P12 |
| B3 | 0.8 | P6 | B7 | 1.0 | P8 |
| B4 | 1.4 | P12 | B8 | 1.2 | P10 |
From last watch test result as can be seen, concrete anti-permeability performance of grain slag and normal concrete anti-permeability performance basically identical substitute fine aggregate with grain slag and can prepare the water-tight concrete that satisfies construction requirement.
(4) the concrete unit weight of grain slag only is 2200kg/m
3, and normal concrete unit weight is 2400kg/m
3, this greatly reduces the load of engineering entity.
This test design slump is 160-200mm, all satisfies the pump concrete requirement, and concrete mix water-retentivity and cohesiveness are better.
Aspect construction application, select for use the B-3 proportioning as the C25 strength grade of concrete, in construction, bleeding, segregation phenomenon do not take place in concrete, be that concrete workability is better, concrete serviceability also satisfies construction requirement, does not also occur quality problems such as honeycomb and scale simultaneously behind the concrete formation, has reached the requirement of real outer light in the concrete fully.The concrete strength result also satisfies the requirement of C25 strength grade.
Three. conclusion
1. blast furnace granulated slag can substitute fine aggregate fully and is used for concrete, the variation of grain slag rate is consistent with sand coarse aggregate ratio variation in the normal concrete when substituting fully, the grain slag concrete is along with the variation of water cement ratio, strength change laws is basic consistent with the Strength of Common variation, equally with normal concrete can satisfy the concrete requirement of different intensity grades.
2. the concrete unit weight of grain slag only is 2200kg/m
3, and normal concrete unit weight is 2400kg/m
3, this has reduced the load of engineering entity to a great extent.
3. concrete anti-permeability performance of grain slag and normal concrete anti-permeability performance basically identical substitute fine aggregate with grain slag and can prepare the water-tight concrete that satisfies construction requirement.
4. the unit weight of grain slag is 69% of regular concrete sand unit weight only, and the price of price and sand is suitable, and the grain slag consumption is 69% of a normal concrete sand consumption in same concrete, has so just reduced concrete production cost.
5. grain slag substitutes fine aggregate fully and is used for concrete, and it is not enough and require to take the other technologies measure to meet the demands certainly will to increase the problem of concrete production cost owing to the quality of sand can not satisfy concrete to have solved sand source, China some areas.
Claims (1)
1. blast furnace granulated slag substitutes the application of sand in concrete batching as fine aggregate, and it is characterized in that: described blast furnace granulated slag is that unit weight is greater than 800kg/m
3And less than 1600kg/m
3Grain slag, fineness modulus is 1.8-3.3, and does not contain iron filings; Described concrete moiety is 7-9wt% water, 10-20wt% cement, 19-26wt% blast furnace granulated slag, 46-53wt% coarse aggregate, 1.5-3.0wt% flyash, 1-2wt% breeze and 0.15-0.30wt% admixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100615537A CN101519284B (en) | 2009-04-10 | 2009-04-10 | Application of blast furnace slag as the fine aggregate to the concrete preparation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100615537A CN101519284B (en) | 2009-04-10 | 2009-04-10 | Application of blast furnace slag as the fine aggregate to the concrete preparation |
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| Publication Number | Publication Date |
|---|---|
| CN101519284A CN101519284A (en) | 2009-09-02 |
| CN101519284B true CN101519284B (en) | 2011-11-30 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102372474A (en) * | 2011-08-11 | 2012-03-14 | 江西创行高科股份有限公司 | Light internal wall panel and preparation process thereof |
| CN105002918B (en) * | 2015-07-17 | 2017-01-04 | 中标建设集团股份有限公司 | A kind of construction method of environment protection light concrete cushion |
| CN106477988A (en) * | 2016-09-30 | 2017-03-08 | 中国冶集团有限公司 | A kind of lightweight aggregate concrete |
| CN106396562A (en) * | 2016-10-13 | 2017-02-15 | 沈阳建筑大学 | C50 concrete containing water granulated slag fully replacing sand and applied to steel pipe concrete structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101186481A (en) * | 2007-12-06 | 2008-05-28 | 上海大学 | Composite gel material for water permeable concrete and preparation method thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101186481A (en) * | 2007-12-06 | 2008-05-28 | 上海大学 | Composite gel material for water permeable concrete and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| JP昭54－25933A 1979.02.27 |
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| CN101519284A (en) | 2009-09-02 |
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