EP0946452A1 - Beton a resistance elevee et ductilite amelioree - Google Patents
Beton a resistance elevee et ductilite amelioreeInfo
- Publication number
- EP0946452A1 EP0946452A1 EP97952737A EP97952737A EP0946452A1 EP 0946452 A1 EP0946452 A1 EP 0946452A1 EP 97952737 A EP97952737 A EP 97952737A EP 97952737 A EP97952737 A EP 97952737A EP 0946452 A1 EP0946452 A1 EP 0946452A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- concrete
- fibers
- strength
- fiber
- strength concrete
- 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.)
- Withdrawn
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 27
- 239000000835 fiber Substances 0.000 claims abstract description 48
- 239000012784 inorganic fiber Substances 0.000 claims abstract description 9
- 239000011372 high-strength concrete Substances 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- -1 polypropylene Polymers 0.000 claims description 10
- 239000004743 Polypropylene Substances 0.000 claims description 9
- 229920001155 polypropylene Polymers 0.000 claims description 9
- 238000005452 bending Methods 0.000 claims description 4
- 239000004574 high-performance concrete Substances 0.000 description 13
- 230000015572 biosynthetic process Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000000654 additive Substances 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- 239000004568 cement Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229910021487 silica fume Inorganic materials 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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
- 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
Definitions
- High-performance concretes which are manufactured using concrete admixtures and substances, stand out among others. characterized by increased strength.
- a low water-cement value (w / c) is achieved through the use of plasticizers with the same processability.
- microfillers primarily microsilica, a by-product of ferro-silicon production, is used to fine-tune the structure of the structure. These microfillers produce three effects that are essentially responsible for increasing the strength of the concrete.
- CH calcium hydroxide
- CSH calcium silicate hydrates
- this problem is countered by increasing the strapping reinforcement.
- the arrangement of such transverse reinforcement prevents the expansion of cracks or creates a triaxial stress state within the constriction, which causes an increase in ductility.
- studies on centrically loaded pressure members showed that a noticeable increase in the deformability of the falling branch of the stress expansion line can only be achieved from reinforcement levels of 2% by volume for rectangular columns or 3% by volume for round columns.
- the degree of transverse reinforcement should be at least 6% by volume. With such high degrees of reinforcement, the concrete can only be poured in with difficulty. In addition, chipping of the outer concrete shell cannot be completely avoided.
- the object of the present invention is to provide a high-strength concrete, the ductility of which is significantly improved compared to known high-strength concretes, despite a lower addition of inorganic fibers.
- the failure of concrete under compressive stress can be explained mechanically by a combination of separation crack formation and the formation of a local push belt.
- the separation crack formation causes an increase in the circumferential compression and weakening of the structure, while only the formation of the local shear fracture band leads to the collapse of the system.
- this fiber Due to the low modulus of elasticity of the organic fiber compared to the concrete matrix, this fiber acts as an internal defect. It accelerates the formation of energy-dissipating microcracks distributed over the entire circumference.
- the existing inorganic fibers "sew" these microcracks and lead to a continuous and stable widening of the cracks as the load continues. This leads to a steady decrease in the system stiffness while increasing the crack width.
- the high energy level in the area of strength is anchored by the friction of the microdefects 1 initiated by the organic fibers, or dissipated by the sewing of the inorganic fibers.
- pressure elements announce the failure due to cracking in good time and are sufficiently deformable to avoid overloading and thus enable a load transfer to components with sufficient load capacity reserves in the structure.
- the present invention also has the essential advantage that the fiber mix can be added to the concrete during the mixing process due to its small proportion. In contrast to the methods known from the prior art, this enables the typical construction site processes to be retained. This is less expensive and also allows the production of vertical components, such as supports, as well as horizontal components and combinations thereof. According to the known methods, only horizontal components, such as plates, can be manufactured.
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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
La présente invention concerne un béton à résistance élevée et ductilité améliorée, contenant des fibres inorganiques. L'invention vise à améliorer considérablement la ductilité d'un tel béton en dépit d'une faible adjonction de fibres inorganiques. A cet effet, le béton à résistance élevée contient environ 30 à 200 kg/m3 de fibres inorganiques réputées pour augmenter la résistance à la flexion sous tension des bétons, ainsi qu'environ 1 à 10 kg/m3 d'une fibre organique présentant un faible module d'élasticité.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19654502 | 1996-12-18 | ||
| DE1996154502 DE19654502A1 (de) | 1996-12-18 | 1996-12-18 | Hochfester Beton mit verbesserter Duktilität und Verfahren zu seiner Herstellung |
| PCT/DE1997/002962 WO1998027022A1 (fr) | 1996-12-18 | 1997-12-18 | Beton a resistance elevee et ductilite amelioree |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0946452A1 true EP0946452A1 (fr) | 1999-10-06 |
Family
ID=7816310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97952737A Withdrawn EP0946452A1 (fr) | 1996-12-18 | 1997-12-18 | Beton a resistance elevee et ductilite amelioree |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0946452A1 (fr) |
| AU (1) | AU5651698A (fr) |
| DE (1) | DE19654502A1 (fr) |
| WO (1) | WO1998027022A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6376523B1 (en) | 1994-05-20 | 2002-04-23 | Texas Biotechnology Corporation | Benzenesulfonamides and the use thereof to modulate the activity of endothelin |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6071613A (en) * | 1998-11-03 | 2000-06-06 | W. R. Grace & Co.-Conn. | Fiber reinforced cementitious materials with improved toughness and ductility |
| FR2804952B1 (fr) * | 2000-02-11 | 2002-07-26 | Rhodia Chimie Sa | Composition de beton ultra haute performance resistant au feu |
| NL1016105C2 (nl) * | 2000-09-05 | 2002-03-07 | Harex Nederland B V | Vezelmengsel voor beton. |
| DE10119461C2 (de) * | 2001-04-17 | 2003-06-12 | Ufz Leipzighalle Gmbh | Verfahren und Vorrichtung zum Heraustrennen von Analysematerial aus einem Holzbohrkern |
| SG105543A1 (en) | 2001-04-25 | 2004-08-27 | Grace W R & Co | Highly dispersible reinforcing polymeric fibers |
| US6569525B2 (en) | 2001-04-25 | 2003-05-27 | W. R. Grace & Co.-Conn. | Highly dispersible reinforcing polymeric fibers |
| EP1544181A1 (fr) * | 2003-12-16 | 2005-06-22 | Trefilarbed Bissen S.A. | Béton de fibres métalliques |
| DE102011087367A1 (de) | 2011-11-29 | 2013-05-29 | Dyckerhoff Ag | Faserverstärkter Beton |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2128935A1 (en) * | 1970-06-12 | 1971-12-16 | Halliburton Co., Duncan, OkIa. (V.StA.) | High-strength cement bodies contng alkali-resistant fibre reinforcement |
| US3834916A (en) * | 1972-03-23 | 1974-09-10 | Steel Corp | Fiber-reinforced cement composite |
| JPS598652A (ja) * | 1982-06-30 | 1984-01-17 | 松下電工株式会社 | 繊維強化セメント板の製法 |
| SU1203065A1 (ru) * | 1984-07-06 | 1986-01-07 | Ленинградский Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Инженерно-Строительный Институт | Способ приготовлени сталефибробетона |
| DE19510338B4 (de) * | 1995-03-22 | 2008-12-11 | Hochtief Ag Vorm. Gebr. Helfmann | Verwendung einer Betonmischung zur Errichtung von gemäß DIN 4102 brandgeschützten, feuerbeständigen Bauwerken |
-
1996
- 1996-12-18 DE DE1996154502 patent/DE19654502A1/de not_active Withdrawn
-
1997
- 1997-12-18 EP EP97952737A patent/EP0946452A1/fr not_active Withdrawn
- 1997-12-18 WO PCT/DE1997/002962 patent/WO1998027022A1/fr not_active Ceased
- 1997-12-18 AU AU56516/98A patent/AU5651698A/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9827022A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6376523B1 (en) | 1994-05-20 | 2002-04-23 | Texas Biotechnology Corporation | Benzenesulfonamides and the use thereof to modulate the activity of endothelin |
Also Published As
| Publication number | Publication date |
|---|---|
| AU5651698A (en) | 1998-07-15 |
| WO1998027022A1 (fr) | 1998-06-25 |
| DE19654502A1 (de) | 1998-06-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19990529 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK FR IT LI LU NL SE |
|
| 17Q | First examination report despatched |
Effective date: 20000428 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20000809 |