WO1996022953A1 - Beton composite - Google Patents
Beton composite Download PDFInfo
- Publication number
- WO1996022953A1 WO1996022953A1 PCT/FR1996/000122 FR9600122W WO9622953A1 WO 1996022953 A1 WO1996022953 A1 WO 1996022953A1 FR 9600122 W FR9600122 W FR 9600122W WO 9622953 A1 WO9622953 A1 WO 9622953A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- concrete
- concrete according
- particles
- fibers
- cement
- Prior art date
Links
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
- C04B28/06—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/02—Plate construction
-
- 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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00068—Mortar or concrete mixtures with an unusual water/cement ratio
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
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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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
- C04B2111/2046—Shock-absorbing materials
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- 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 invention relates to a composite concrete with a low cement and fiber content having good mechanical properties, and also having good protective properties against impacts, shocks or projectiles.
- plasticizers 1.5 to 5 parts
- anti-foaming agent 0. to 0.5 parts
- This composite concrete seems to have mechanical properties, in particular a flexural strength, superior to that of the compacted concrete mentioned above, but it is easily understood that this is, at least in part, linked to its relatively high contents of cement and fibers. Furthermore, this composite concrete with a relatively high content of cement and fibers is supposed to be able to limit the penetration of projectiles. However, this property is neither demonstrated nor illustrated.
- German patent application No. 3734327 of October 1987, describes a construction element capable of resisting the penetration of projectiles.
- These elements are produced by means of a composite concrete comprising a hydraulic binder composed by a cement (Z35 to 55: 270 to 450 kg / m3), hard additives (basalt, quartz, quartzite, alone or in mixture) of dimension to less than 4 mm, silica powder (1850 to 1500 kg / m3) and fibers (steel, glass, synthetic, carbon fibers).
- this concrete does not contain a dispersing or fluidizing agent, the mixing water content is, in a known manner, generally greater than 30% by weight, leading to poor mechanical properties, in particular for resistance to compression and to flexion, and more particularly with regard to the depth of penetration of projectiles which can only be significant. These mechanical properties are however neither demonstrated nor illustrated in the description.
- This concrete can also include metallic, glass, ceramic, carbon, alumina or other fibers.
- this composite concrete contains a large quantity of mixing water, leading to weak mechanical properties, in particular for the compressive and flexural strengths, which would ipso facto cause a significant penetration depth of projectiles in the case of a use of this composition for protection.
- the Applicant has therefore managed to fill the gap mentioned above by developing a composite concrete of the type comprising a hydraulic binder, aggregates, an additive and metallic fibers, characterized in that it comprises: a) from 70 to 85% of particles (A) having a particle size distribution which can range from 0.01 / 3 mm to 0.01 / 50 mm, b) from 2 to 10% of particles (B) having a particle size between 0.01 and 1 ⁇ m, ie between 10 " 5 and 10 _3 mm, c) from 3 to 20% of hydraulic binder, d) from 0, 1 to 3% of a dispersant or of a plasticizer, e) from 0.05 to 8 , 5% of fibers, f) of the mixing water, the percentages all being percentages by weight referred to the sum of the weights of the constituents a) to d).
- the particles (A) of the concrete according to the invention have a particle size distribution which can range from 0.01 / 3 mm to 0.01 / 50 mm.
- These particles are aggregates, aggregates or gravel which generally have very irregular and varied shapes. They can consist for example of one or more materials such as tabular alumina, fused corundum, natural or calcined bauxite, alumina-based materials sold under the brand "ALAG", granite, quartzite , diabase, basalt, crystalline quartz, silicon carbides, silicon nitrides, boron carbides, titanium carbides, metals, metal alloys, etc. Aggregates preferably having a hardness greater than 5 Mohs.
- the particles (B) have, at least for most of them, a particle size between 0.01 and 1 ⁇ m.
- These are fly ash or various ultra-fine fillers such as silica fumes, microsilica, kaolinites, calcined clays, limestone fines, chromium oxide, titanium oxide, zirconium oxide, aluminum oxide, etc. They are obtained, for example, by condensation or precipitation.
- silica fumes are used as particles (B), such as for example those sold by the company ELKEM under the name 971 U.
- the hydraulic binder is preferably an aluminous cement, a mixture of aluminous cements, a vitreous cement or a mixture of vitreous cements, a Portland cement composed or not (CEM I, CEM II) or a mixture of Portland cements, a cement containing dairy or pozzolana.
- the hydraulic binder is a cement based on calcium silicates
- its content is between approximately 10% and approximately 20%.
- the hydraulic binder is an aluminous cement
- its content in the concrete is preferably between approximately 3% and approximately 10%.
- the fibers can be metallic fibers, mineral fibers, glass fibers, carbon fibers or plastic fibers.
- the metallic fibers can be steel fibers such as, for example, those marketed by the company Harex or the company Eurosteel Silifiber, or the Dramix fibers marketed by the company Bekaert, or else cast iron fibers, such as those marketed by the company Monsoon Bridge.
- the plastic fibers can be thermoplastic polymer fibers such as polyamide, polypropylene, polyethylene fibers, acrylic fibers, polyester fibers, etc.
- metallic fibers are used, and among metallic fibers, it is preferable to choose cast iron or steel fibers.
- These fibers generally have a length of about 5 to 50 mm and a diameter of about 0.1 to 3 mm
- the fiber content present in the concrete according to the invention is preferably between 0.05% and 5% by weight.
- dispersant or fluidizer it is possible to use, for example, a hexametaphosphate, a tripolyphosphate, a polynaphthalene sulfonate, a sulfonated polyamine, etc.
- the percentages indicated (0.1 to 3%) correspond to a weight of the dry extract based on the sum of the weights of the constituents a) to d).
- the concrete according to the invention may also contain particles (C) having, at least for most of them, a particle size between 1 and 10 ⁇ m.
- particles (C) is preferable when the quantity of hydraulic binder used is small.
- the content of particles (C) is preferably less than 12% by weight relative to the sum of the weights of the constituents a) to d) and the weight of said particles (C), and the percentage of fibers is then calculated by weight by relative to the sum of the weights of the constituents a) to d) and the weight of said particles (C).
- the concrete according to the invention may also contain one or more various additives, such as, for example, an anti-foam, a water-repellent, an air entrainer, a setting accelerator, a setting retarder, a dye, etc.
- the content of additives) is generally less than 1% by weight relative to the sum of the weights of the constituents a) to d) of the concrete, plus, where appropriate, the weight of the particles (C).
- the Applicant has discovered that it is desirable for the compactness of the concrete to be maximum. This can be achieved for example by providing that the distribution curves (number of particles as a function of their dimensions) of the particles (A), of the particles (B), of the particles constituting the hydraulic binder and, where appropriate, of the particles (C) , are continuous or have the maximum continuity, it being understood that the medium does indeed contain the dispersing or thinning agent.
- the concrete according to the invention contains particles (A) and (B) having the highest possible number of different dimensions within the range which corresponds to them, namely, 0.0 lmm to 50mm, and 0.01 to l ⁇ m, respectively, which allows it to have maximum compactness and gives it optimal mechanical properties and resistance to penetration.
- the concrete according to the invention During the preparation of the concrete according to the invention, its various constituents are mixed in the presence of water.
- This water is essential for the hydration of the hydraulic binder.
- the quantity of water involved is a function of the fluidity and the maneuverability which it is desired to obtain for the pouring of the concrete. It is generally between 2 and 5% by weight relative to the sum of the weights of the constituents a) to d) of the concrete, plus, where appropriate, the weight of the particles (C). Water is generally introduced before the fibers.
- a concrete having good projectile protection properties is a concrete which offers a sufficiently high penetration resistance for the projectile so that the penetration depth of this projectile is small and which, moreover, does not does not break when the projectile hits.
- the concrete according to the invention therefore makes it possible to achieve high protection against impacts, shocks or projectiles, even when it is used in the form of thin walls, walls, or slabs. It can therefore be used for the production of protective coatings against small projectiles, such as bullets fired by firearms, or against large projectiles, such as bombs.
- It can also be used for the manufacture of individual or collective shelters, static or mobile, for the protection of banks, prisons, installations such as the so-called vital industrial installations, against break-ins or assaults that could be committed, in particular, at by means of jackhammers or similar tools, or for coating objects to be transported and which may fall during transport. It can also be used in the nuclear field or in the field of earthquake protection.
- the concrete according to the invention can be prepared in the following way: the components a), b) c), d) and f) are introduced into a mixer and mixing is carried out until the desired consistency is obtained,
- the fibers are introduced e) while continuing to knead, so that the fibers are dispersed as uniformly as possible
- the concrete is preferably subjected to a baking at a temperature between about 80 ° C and about 600 ° C, preferably between about 110 ° C and about 350 ° C, until it is dry, this which means, for a person skilled in the art, that it comprises a free water content generally less than 0.2%, in percentage by mass relative to the concrete.
- composition A1 corresponds to example n ° 9 of the French patent application n ° 2 633 922.
- the composition A2 corresponds to example n ° 3 of the french patent application n ° 2 640 962.
- TPP Tri ⁇ oh sodium phosphate marketed by Rhône-Poulenc
- PNS Polvnaphthalene sulfonate sodium marketed by the company CF. P I under the name "GALORYL PA 120"
- the fibers used were straight and smooth steel fibers having a length of approximately 17 mm and a diameter of approximately 0.2 mm, sold by the company Tréfileries de Conflandery.
- the water yield was also calculated based on the weight of the particles (A), (B), (C), the cement and the dispersant.
- the penetration resistance tests were carried out on concrete slabs according to the invention acting as a target and whose dimensions were approximately 40 ⁇ 40 ⁇ 10 cm.
- the projectiles were ordinary bullets, 12.7 mm in diameter and weighing about 46 g, fired using a 12.7 type machine gun. The distance from the end of the 12.7 gun to the targets was such that the bullets hit the targets with a speed of the order of 830 m / s.
- the penetration depth was then measured on the targets having resisted the impact of the projectile by introducing a gauge inside the imprint left by the projectile after rebounding on the surface of the concrete.
- Parboiled concretes show greater resistance to penetration than unboiled concretes.
- the targets were blocks of dimension lxl, 25xlm composed of a first layer of concrete according to Example 5 20 cm thick in contact with a second layer of ordinary concrete 80 cm thick.
- the projectiles hit the targets (the first layer) with a speed of the order of 270 m / s.
- the penetration depth of the projectiles remained less than 30 mm.
- the projectiles were practically dislocated after impact and no cracking of the targets appeared.
- the targets were blocks of dimension 2x2xl, 2m composed of a first layer of concrete according to Example 5 of 50 cm thick in contact with a second layer of ordinary concrete of 70 cm thick.
- the projectiles hit the targets (the first layer) with a speed of the order of 280 m s.
- the penetration depth of the projectiles remained less than 40 cm. During a test carried out under the same conditions with a slab entirely made of ordinary concrete, the penetration depth of the projectiles was approximately 90 cm.
- the projectiles hit the targets with a speed of the order of 980 m / s.
- the penetration depth of the projectiles remained less than 100mm. After 7 shots made successively on the same slab, targeting the same point of impact, the penetration depth was still less than 160mm.
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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)
- General Engineering & Computer Science (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52268096A JPH10512842A (ja) | 1995-01-25 | 1996-01-24 | 複合コンクリート |
EP96901849A EP0805788A1 (fr) | 1995-01-25 | 1996-01-24 | Beton composite |
US08/875,688 US6080234A (en) | 1995-01-25 | 1996-01-24 | Composite concrete |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR95/01057 | 1995-01-25 | ||
FR9501057A FR2729658B1 (fr) | 1995-01-25 | 1995-01-25 | Beton composite |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996022953A1 true WO1996022953A1 (fr) | 1996-08-01 |
Family
ID=9475648
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1996/000122 WO1996022953A1 (fr) | 1995-01-25 | 1996-01-24 | Beton composite |
Country Status (6)
Country | Link |
---|---|
US (1) | US6080234A (fr) |
EP (1) | EP0805788A1 (fr) |
JP (1) | JPH10512842A (fr) |
CA (1) | CA2212959A1 (fr) |
FR (1) | FR2729658B1 (fr) |
WO (1) | WO1996022953A1 (fr) |
Cited By (4)
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FR2771406A1 (fr) * | 1997-11-27 | 1999-05-28 | Bouygues Sa | Beton de fibres metalliques, matrice cimentaire et premelanges pour la preparation de la matrice et du beton |
FR2850965A1 (fr) * | 2003-02-06 | 2004-08-13 | Bouygues Travaux Publics | Compositions cimentaires durcissables et applications aux ecrans radiologiques et aux conteneurs de dechets radioactifs |
WO2009081277A1 (fr) | 2007-12-21 | 2009-07-02 | Lafarge | Composition de béton |
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Citations (6)
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DE3636644A1 (de) * | 1986-10-28 | 1988-05-26 | Garny Sicherheitstechn Gmbh | Verwendung einer betonmischung als fuellstoff fuer tresorwaende |
EP0273181A2 (fr) * | 1986-12-23 | 1988-07-06 | Cemcom Corporation | Matériau de ciment contenant des fibres métalliques |
EP0350365A1 (fr) * | 1988-07-08 | 1990-01-10 | Screg Routes Et Travaux Publics | Béton compacté renforcé de fibres et son utilisation |
FR2640962A1 (en) * | 1988-12-26 | 1990-06-29 | Sogea | Composite concrete of very high performance and process for its use |
EP0451014A1 (fr) * | 1990-04-02 | 1991-10-09 | Savoie Refractaires | Composition de béton pour la fabrication de moules, moule et procédé de fabrication d'un moule |
WO1995001317A1 (fr) * | 1993-07-01 | 1995-01-12 | Bouygues | Procede et composition pour fabriquer des elements en beton ayant une resistance a la compression et une energie de fracturation remarquables et elements ainsi obtenus |
Family Cites Families (4)
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FR2432489A1 (fr) * | 1978-08-03 | 1980-02-29 | Kraszewski Richard | Composition hydrofuge en poudre a base de ciment et son application |
US4472201A (en) * | 1981-08-15 | 1984-09-18 | Kurosaki Refractories Co., Ltd. | Hydraulic heat-resisting material and premold product made of such hydraulic heat-resisting material |
US5447564A (en) * | 1994-02-16 | 1995-09-05 | National Research Council Of Canada | Conductive cement-based compositions |
US5783297A (en) * | 1995-08-16 | 1998-07-21 | Cemcom Corporation | Materials for shock attenuation |
-
1995
- 1995-01-25 FR FR9501057A patent/FR2729658B1/fr not_active Expired - Fee Related
-
1996
- 1996-01-24 US US08/875,688 patent/US6080234A/en not_active Expired - Fee Related
- 1996-01-24 JP JP52268096A patent/JPH10512842A/ja active Pending
- 1996-01-24 CA CA 2212959 patent/CA2212959A1/fr not_active Abandoned
- 1996-01-24 WO PCT/FR1996/000122 patent/WO1996022953A1/fr not_active Application Discontinuation
- 1996-01-24 EP EP96901849A patent/EP0805788A1/fr not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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DE3636644A1 (de) * | 1986-10-28 | 1988-05-26 | Garny Sicherheitstechn Gmbh | Verwendung einer betonmischung als fuellstoff fuer tresorwaende |
EP0273181A2 (fr) * | 1986-12-23 | 1988-07-06 | Cemcom Corporation | Matériau de ciment contenant des fibres métalliques |
EP0350365A1 (fr) * | 1988-07-08 | 1990-01-10 | Screg Routes Et Travaux Publics | Béton compacté renforcé de fibres et son utilisation |
FR2633922A1 (fr) * | 1988-07-08 | 1990-01-12 | Screg Routes & Travaux | Beton compacte renforce de fibres et son utilisation |
FR2640962A1 (en) * | 1988-12-26 | 1990-06-29 | Sogea | Composite concrete of very high performance and process for its use |
EP0451014A1 (fr) * | 1990-04-02 | 1991-10-09 | Savoie Refractaires | Composition de béton pour la fabrication de moules, moule et procédé de fabrication d'un moule |
WO1995001317A1 (fr) * | 1993-07-01 | 1995-01-12 | Bouygues | Procede et composition pour fabriquer des elements en beton ayant une resistance a la compression et une energie de fracturation remarquables et elements ainsi obtenus |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2771406A1 (fr) * | 1997-11-27 | 1999-05-28 | Bouygues Sa | Beton de fibres metalliques, matrice cimentaire et premelanges pour la preparation de la matrice et du beton |
WO1999028267A1 (fr) * | 1997-11-27 | 1999-06-10 | Bouygues Travaux Publics | Beton de fibres metalliques, matrice cimentaire et pre-melanges pour la preparation de la matrice et du beton |
CN1325425C (zh) * | 1997-11-27 | 2007-07-11 | 布伊格公共工程公司 | 混凝土和用于产生其中分散有纤维的混凝土的预混料 |
CZ301900B6 (cs) * | 1997-11-27 | 2010-07-28 | Bouygues Travaux Publics | Betonová smes zesílená kovovými vlákny, cementové základní hmoty a predbežné smesi pro prípravu betonové základní hmoty |
FR2850965A1 (fr) * | 2003-02-06 | 2004-08-13 | Bouygues Travaux Publics | Compositions cimentaires durcissables et applications aux ecrans radiologiques et aux conteneurs de dechets radioactifs |
WO2009081277A1 (fr) | 2007-12-21 | 2009-07-02 | Lafarge | Composition de béton |
RU2462435C1 (ru) * | 2011-06-07 | 2012-09-27 | Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный технологический институт (технический университет)" | Бетонная масса |
Also Published As
Publication number | Publication date |
---|---|
EP0805788A1 (fr) | 1997-11-12 |
FR2729658A1 (fr) | 1996-07-26 |
US6080234A (en) | 2000-06-27 |
JPH10512842A (ja) | 1998-12-08 |
FR2729658B1 (fr) | 1997-04-04 |
CA2212959A1 (fr) | 1996-08-01 |
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