WO2010102675A1 - Hydraulic binder - Google Patents

Hydraulic binder Download PDF

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Publication number
WO2010102675A1
WO2010102675A1 PCT/EP2009/053022 EP2009053022W WO2010102675A1 WO 2010102675 A1 WO2010102675 A1 WO 2010102675A1 EP 2009053022 W EP2009053022 W EP 2009053022W WO 2010102675 A1 WO2010102675 A1 WO 2010102675A1
Authority
WO
WIPO (PCT)
Prior art keywords
slag
cement
composition according
weight
content
Prior art date
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.)
Ceased
Application number
PCT/EP2009/053022
Other languages
French (fr)
Inventor
Ijsbrand-Jan Cornelis Maria Galema
Yvan Brijsse
Karel Marie Cyriel Alice De Cuyper
Geert Jo Willy Timmermans
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MGP TECHNOLOGY BV
Original Assignee
MGP TECHNOLOGY BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MGP TECHNOLOGY BV filed Critical MGP TECHNOLOGY BV
Priority to PCT/EP2009/053022 priority Critical patent/WO2010102675A1/en
Publication of WO2010102675A1 publication Critical patent/WO2010102675A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • 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
    • C04B28/06—Aluminous 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
    • 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
    • C04B28/08—Slag cements
    • C04B28/082—Steelmaking slags; Converter 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

Definitions

  • the present invention relates to a hydraulically setting binder, based on recycled materials.
  • European patent application EP 1 167 319 A discloses a hydraulically setting mixture of construction and demolition debris and foundry slag as aggregates with water glass as a binder.
  • US 2006/0260514 discloses the use of concrete waste in combination with CaO. This has the drawback that high CaO contents cause substantial expansion of the compound during setting.
  • Concrete rubble can be regarded as a slow pozzolan with only limited hydraulic properties.
  • its main constituents are SiO2 and A12O3 and minor contents of Fe2O3 and CaO, which may be present as such or as CaCO3 and Ca (OH) 2.
  • Pozzolanic setting reaction is considerably slower than other hydraulic setting reactions. Consequently, the short-term strength of concrete made of concrete rubble is low.
  • CaO containing compounds such as Portland cement.
  • the used composition has only a limited content of recycled material. It is an object of the invention to provide a hydraulically binding compound combining a high content of recycled materials with excellent strength properties,
  • the object of the invention is achieved with a hydraulically setting composition
  • a hydraulically setting composition comprising a mixture of powdered, e.g., milled or ground, concrete waste and LD-slag.
  • LD-slag is a slag generated during steel production by Linz- Donawitz (LD) process of steel production.
  • LD- or basic oxygen furnace (BOF) process carbon-rich molten iron is made into steel. By blowing oxygen through molten pig iron, the carbon content of the alloy is lowered to produce low-carbon steel.
  • LD-slag, or BOF-slag has a high content of CaO (typically about 45 - 55 % by weight) , and substantial contents of Fe (typically about 15 - 20 % by weight), SiO2 (typically about 15 % by weight) and P2O5 (typically about 2 - 4 % by weight) .
  • LD-slag as hydraulic binder is disclosed in WO 2007/013087 and US 2004/0020411. LD-slag as such is a slowly setting binder.
  • composition according to the present invention can for example have a concrete waste content of 20 - 70 % by weight, e.g., 25 - 65 % by weight.
  • the content of LD-slag can for example be up to 40 % by weight, e.g., 5 - 35 % by weight.
  • other mixing ratios can also be used, if so desired.
  • the composition according to the invention can comprise a cement or cement clinker, such as Portland cement (CEM I), CEM II or CEM III types of cement, aluminate cement, or mixtures thereof.
  • the cement content can for example be up to 70 % by weight, e.g., 15 - 70 % by weight.
  • the use of such a cement in the composition according to the invention can enhance early strength (e.g., the strength after 7 days).
  • Ground granulated blast furnace slag can also be used, either alone or in combination with the aforementioned cement types.
  • the blast furnace slag content can for example be up to 50 % by weight.
  • additives such as setting retarders, accelerators, pigments, fillers, such as sand, further co- binders, such as gypsum, lime and / or one or more pozzolans, e.g., fly ash, silica fume and/or metakaolin, can also be used to adjust the hydraulic performance or other desired properties.
  • setting retarders accelerators, pigments, fillers, such as sand
  • co- binders such as gypsum, lime and / or one or more pozzolans, e.g., fly ash, silica fume and/or metakaolin
  • pozzolans e.g., fly ash, silica fume and/or metakaolin
  • the concrete waste can be obtained by separation from construction and demolition waste, e.g., in a process as disclosed in US 2006/0260514.
  • the process may involve one or more milling and sieving steps.
  • the concrete material can be heated, e.g., to about 400 - 500 0 C, to make it more fragile.
  • the obtained powder can be passed through a cyclone, blended and/or homogenized.
  • the concrete waste in the composition according to the invention is sieved to have a grain size of 100 ⁇ m or less.
  • the LD-slag is prepared, e.g., by crushing, milling and sieving, to have a grain size of 100 ⁇ m or less.
  • it can first be crushed and sieved to have a grain size of 3 mm or less, before milling it further to the required grain size.
  • Metallic fraction can be removed from the slag, e.g., by using a magnetic separator.
  • the concrete waste and the LD-slag and optionally further components can be mixed and blended in a mixer.
  • the hydraulically setting composition according to the present invention can for example be used as a hydraulic binder in concrete, for road bases and sub-bases, capping layers, soil stabilization or soil improvement.

Landscapes

  • 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)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

Hydraulically setting composition comprising a mixture of powdered or granulated, e.g., milled or ground concrete waste and LD-slag, The composition can for example have a concrete waste content of 20 - 70 % by weight. The content of LD-slag can for example be up to 40 % by weight. Optionally, the composition can comprise, e.g., 15 - 70 wt. % of one or more compounds of the group comprising Portland cement (CEM I), CEM II or CEM III types of cement, aluminate cement, ground granulated blast furnace slag or mixtures thereof. The concrete waste and/or the LD-slag can for example have a grain size of 100 μm or less.

Description

HYDRAULIC BINDER
The present invention relates to a hydraulically setting binder, based on recycled materials.
European patent application EP 1 167 319 A discloses a hydraulically setting mixture of construction and demolition debris and foundry slag as aggregates with water glass as a binder.
US 2006/0260514 discloses the use of concrete waste in combination with CaO. This has the drawback that high CaO contents cause substantial expansion of the compound during setting.
The use of powdered concrete waste is also disclosed in Japanese patent application JP 2005/320201 and DE 198 33 447 A.
Concrete rubble can be regarded as a slow pozzolan with only limited hydraulic properties. Generally, its main constituents are SiO2 and A12O3 and minor contents of Fe2O3 and CaO, which may be present as such or as CaCO3 and Ca (OH) 2. Pozzolanic setting reaction is considerably slower than other hydraulic setting reactions. Consequently, the short-term strength of concrete made of concrete rubble is low. To expand the possible field of use of concrete rubble as a binder, it has been combined with CaO containing compounds, such as Portland cement. As a result, the used composition has only a limited content of recycled material. It is an object of the invention to provide a hydraulically binding compound combining a high content of recycled materials with excellent strength properties,
The object of the invention is achieved with a hydraulically setting composition comprising a mixture of powdered, e.g., milled or ground, concrete waste and LD-slag.
LD-slag is a slag generated during steel production by Linz- Donawitz (LD) process of steel production. In this LD- or basic oxygen furnace (BOF) process, carbon-rich molten iron is made into steel. By blowing oxygen through molten pig iron, the carbon content of the alloy is lowered to produce low-carbon steel. LD-slag, or BOF-slag, has a high content of CaO (typically about 45 - 55 % by weight) , and substantial contents of Fe (typically about 15 - 20 % by weight), SiO2 (typically about 15 % by weight) and P2O5 (typically about 2 - 4 % by weight) .
The use of LD-slag as hydraulic binder is disclosed in WO 2007/013087 and US 2004/0020411. LD-slag as such is a slowly setting binder.
Surprisingly it has been found that mixtures of LD-slag and powdered concrete waste result in a hydraulically setting composition with very good strength properties, without the need of additional binding agents such as water glass. The invention makes it possible to use a hydraullic composition with a very high content of waste materials for high performace applications. The combined use of LD slag and concrete rubble enables joint valorization of these two waste materials.. Since the production of traditional cement types involves high CO2 emission, a substantial reduction of CO2 emission can be achieved by replacing such cements by a composition according to the present invention.
The composition according to the present invention can for example have a concrete waste content of 20 - 70 % by weight, e.g., 25 - 65 % by weight. The content of LD-slag can for example be up to 40 % by weight, e.g., 5 - 35 % by weight. For specific applications, other mixing ratios can also be used, if so desired.
Optionally, the composition according to the invention can comprise a cement or cement clinker, such as Portland cement (CEM I), CEM II or CEM III types of cement, aluminate cement, or mixtures thereof. The cement content can for example be up to 70 % by weight, e.g., 15 - 70 % by weight. The use of such a cement in the composition according to the invention can enhance early strength (e.g., the strength after 7 days). Ground granulated blast furnace slag can also be used, either alone or in combination with the aforementioned cement types. The blast furnace slag content can for example be up to 50 % by weight.
Optionally, other additives, such as setting retarders, accelerators, pigments, fillers, such as sand, further co- binders, such as gypsum, lime and / or one or more pozzolans, e.g., fly ash, silica fume and/or metakaolin, can also be used to adjust the hydraulic performance or other desired properties.
The concrete waste can be obtained by separation from construction and demolition waste, e.g., in a process as disclosed in US 2006/0260514. The process may involve one or more milling and sieving steps. Optionally, the concrete material can be heated, e.g., to about 400 - 5000C, to make it more fragile. Optionally, the obtained powder can be passed through a cyclone, blended and/or homogenized.
Preferably, the concrete waste in the composition according to the invention is sieved to have a grain size of 100 μm or less.
Preferably, the LD-slag is prepared, e.g., by crushing, milling and sieving, to have a grain size of 100 μm or less.
Optionally, it can first be crushed and sieved to have a grain size of 3 mm or less, before milling it further to the required grain size. Metallic fraction can be removed from the slag, e.g., by using a magnetic separator.
The concrete waste and the LD-slag and optionally further components can be mixed and blended in a mixer.
The hydraulically setting composition according to the present invention can for example be used as a hydraulic binder in concrete, for road bases and sub-bases, capping layers, soil stabilization or soil improvement.
The present invention will be explained by the following examples.
Examples
Increasing the % of LD-slag in a mix of ground concrete and LD-slag gives the following results on early strength, determined according to industrial standard ISO 4031:
Figure imgf000006_0001

Claims

1. Hydraulically setting composition comprising a mixture of powdered or granulated, e.g., milled or ground concrete waste and LD-slag.
2. Composition according to claim 1 wherein the concrete waste content is 20 - 70 % by weight
3. Composition according to claim 2 wherein the concrete waste content is 25 - 65 % by weight.
4. Composition according to any one of the preceding claims wherein the content of LD-slag is up to 40 % by weight.
5. Composition according to any one of the preceding claims wherein the composition further comprises one or more cement compounds.
6. Composition according to claim 5 wherein the cement compound comprises one or more compounds of the group comprising Portland cement (CEM I), CEM II or CEM III types of cement, aluminate cement, ground granulated blast furnace slag or mixtures thereof.
7. Composition according to claim 5 or 6 wherein the content of cement is 15 - 70 wt%.
8. Composition according to any one of the preceding claims wherein the concrete waste has a grain size of 100 μm or less. Composition according to any one of the preceding claims wherein the LD-slag has a grain size of 100 μm or less.
PCT/EP2009/053022 2009-03-13 2009-03-13 Hydraulic binder Ceased WO2010102675A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2009/053022 WO2010102675A1 (en) 2009-03-13 2009-03-13 Hydraulic binder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2009/053022 WO2010102675A1 (en) 2009-03-13 2009-03-13 Hydraulic binder

Publications (1)

Publication Number Publication Date
WO2010102675A1 true WO2010102675A1 (en) 2010-09-16

Family

ID=41171074

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/053022 Ceased WO2010102675A1 (en) 2009-03-13 2009-03-13 Hydraulic binder

Country Status (1)

Country Link
WO (1) WO2010102675A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20132059A1 (en) * 2013-12-10 2015-06-11 Mapei Spa ACCELERATING ADDITIVE FOR CEMENTITIOUS COMPOSITIONS
EP4046975A1 (en) * 2021-02-22 2022-08-24 Vigier Management AG Concrete compound and method for producing the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT400540B (en) * 1994-01-28 1996-01-25 Voest Alpine Stahl Method for incorporating and solidifying waste materials
JPH08100177A (en) * 1994-08-01 1996-04-16 Yawata Kouro Concrete Kk Construction and building composition for backfilling, etc.
BR9606112A (en) * 1996-12-11 1999-03-23 Gomes Pedro Linhares Non-burned germ products for use in civil construction
EP1167319A1 (en) * 2000-05-29 2002-01-02 Maquelri, S.L. Process for making cementitious agglomerates using waste building and demolition materials and agglomerating them with a chemical additive

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT400540B (en) * 1994-01-28 1996-01-25 Voest Alpine Stahl Method for incorporating and solidifying waste materials
JPH08100177A (en) * 1994-08-01 1996-04-16 Yawata Kouro Concrete Kk Construction and building composition for backfilling, etc.
BR9606112A (en) * 1996-12-11 1999-03-23 Gomes Pedro Linhares Non-burned germ products for use in civil construction
EP1167319A1 (en) * 2000-05-29 2002-01-02 Maquelri, S.L. Process for making cementitious agglomerates using waste building and demolition materials and agglomerating them with a chemical additive

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20132059A1 (en) * 2013-12-10 2015-06-11 Mapei Spa ACCELERATING ADDITIVE FOR CEMENTITIOUS COMPOSITIONS
WO2015086453A1 (en) 2013-12-10 2015-06-18 Mapei S.P.A. Accelerating admixture for cementitious compositions
US9617185B2 (en) 2013-12-10 2017-04-11 Mapei S.P.A. Accelerating admixture for cementitious compositions
EP4046975A1 (en) * 2021-02-22 2022-08-24 Vigier Management AG Concrete compound and method for producing the same

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