WO2005102955A2 - Tragelement und tragelementanordnung, insbesondere für betonbauwerke und betonbauteile - Google Patents
Tragelement und tragelementanordnung, insbesondere für betonbauwerke und betonbauteile Download PDFInfo
- Publication number
- WO2005102955A2 WO2005102955A2 PCT/EP2005/004096 EP2005004096W WO2005102955A2 WO 2005102955 A2 WO2005102955 A2 WO 2005102955A2 EP 2005004096 W EP2005004096 W EP 2005004096W WO 2005102955 A2 WO2005102955 A2 WO 2005102955A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- crystallite
- polymer component
- element according
- binder
- support element
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
Definitions
- Support element and support element arrangement in particular for concrete structures and concrete components
- the invention relates to a support element and a support arrangement, in particular for concrete structures and concrete components, the.
- Carrying element comprises at least one supporting fiber arrangement embedded in a binder.
- the supporting element arrangement belonging to the subject matter of the invention the supporting element is connected to a building or component by means of an adhesive.
- Support elements and support element arrangements of this type are known, for example in the form of scrims or woven fabrics made of high-strength fibers, which are laminated on with a binder in the tension zone of a concrete surface. Correspondingly prefabricated laminates are also used, which are glued in the tension zone of a concrete surface.
- the application extends to repairs at cracks and fractures of load-bearing concrete structures, but also to the reinforcement of structures that are still intact for increased loads as well as to new designs for concentrated loads, especially in situations where space is soaked up. In these and other applications, concrete with more or less high moisture content is generally present in the base of the laminate support elements.
- the coatings and intermediate layers may also contain water and other dampening media, the long-term diffusion of which in the form of corresponding vapors should not be hindered by the extensive support elements or their hardened binder polymer components.
- Known urethane-based polymers are available for the binders, which, when cured, have sufficient vapor permeability for the purposes at hand.
- such binders have a very low shear emodule compared to the modules of the high-strength laminate fibers.
- fiber strength cannot be fully exploited in many cases because the shear-soft binder located between the substrate to be relieved and the laminate fibers as well as between the laminate fibers themselves limits the force transmission to the fibers to values that are too low. This is especially true for pre-stressed fiber arrangements.
- known binder polymers with modulus values suitable for the present purposes in particular the known epoxy binders, have practically no vapor permeability in the hardened state.
- a first object of the invention is therefore to create a support element which comprises at least one support fiber arrangement embedded in a binder and which is distinguished by high vapor permeability with high strength and modulus values at the same time.
- the further task of the invention directed towards a support element arrangement the same applies correspondingly to the bonding between the substrate and the support element.
- the solution according to the invention of the first task of the invention is determined by the features of patent claim 1, that of further tasks of the invention by the features of the subordinate claims.
- a binder polymer component is first required which, taken by itself, has a relatively high water vapor diffusion resistance coefficient ⁇ in the hardened state.
- This standardized coefficient is a dimensionless number and indicates how many times the water vapor diffusion resistance of a layer of the The substance in question is that of an equally thick, resting air layer of the same temperature. It is therefore a material-specific characteristic value for water vapor diffusion.
- the ⁇ -value is around 10 5 , which means practically impermeability and makes these resins unsuitable as binders for purposes of building reinforcement with relevant post-drying of the substrate.
- epoxy resins have a high potential in terms of tensile and shear strength and also in terms of shear modulus (high shear stiffness), which makes them preferred as binders in reinforcement laminates, particularly in constructions with high fiber prestressing.
- microcrystalline mineral substances are particularly suitable for the crystallite fraction, preferably those with alkaline reactivity, for example, in particular silicate-containing crystallite materials. PH values in the range between 9 and 12 are therefore advantageous for the crystallite fraction.
- the alkaline crystallite fraction in fine distribution within the binder polymer component comes into contact with air diffusing in from the outside and can neutralize the carbon dioxide present in it. This helps to maintain the alkaline character in the concrete and thus to prevent corrosion effects on steel reinforcements in the concrete.
- fiber arrangements interspersed with a binder polymer component and a crystallite component, at least partially consisting of high-strength polymer are therefore particularly suitable, especially those with fibers made of aramide, carbon and / or alkali-resistant glass.
- Such fiber arrangements preferably with an epoxy-based binder, are eminently suitable for the production of supporting fiber arrangements with strands and scrims, especially in a unidirectional arrangement, but also of fabrics and the like with fibers or fiber bundles twisted at least partially with respect to one another.
- a laminate support element or a plurality thereof is connected to a building by gluing.
- This bond contains a polymer component which, by itself, ie without crystallite content, has a relatively high diffusion resistance number ⁇ of, for example, at least 20,000 in the hardened state, but advantageously high mechanical elasticity and strength values, namely, for example, a shear modulus G of at least 5000 N / mm 2 and a tensile strength of at least 10 N / mm 2 .
- Including a crystallite fraction according to the invention then results in a water vapor diffusion resistance number ⁇ of at most 10,000.
- a peculiarity of such a support element arrangement can be seen in the fact that the bonding of the support element to the substrate is vapor-permeable. This is of significant importance in practice, in particular for prefabricated laminate fiber support elements which are to be connected in the solid state to a component or building and which themselves can also be more or less vapor-permeable. Without the vapor permeability of the bond itself, the total vapor permeability would be largely eliminated.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05770875A EP1819644A2 (de) | 2004-04-27 | 2005-04-18 | Tragelement und tragelementanordnung, insbesondere für betonbauwerke und betonbauteile |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202004006742.0 | 2004-04-27 | ||
DE202004006742U DE202004006742U1 (de) | 2004-04-27 | 2004-04-27 | Tragelement und Tragelementanordnung, insbesondere für Betonbauwerke und Betonbauteile |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005102955A2 true WO2005102955A2 (de) | 2005-11-03 |
WO2005102955A3 WO2005102955A3 (de) | 2006-04-20 |
Family
ID=34979339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/004096 WO2005102955A2 (de) | 2004-04-27 | 2005-04-18 | Tragelement und tragelementanordnung, insbesondere für betonbauwerke und betonbauteile |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1819644A2 (de) |
DE (1) | DE202004006742U1 (de) |
WO (1) | WO2005102955A2 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0441297A1 (de) * | 1990-02-05 | 1991-08-14 | Sto Aktiengesellschaft | Kunstharzgebundenes Beschichtungsmaterial zum Auftragen auf Gebäudewände, vorzugsweise Kunstharzputz |
WO1999032738A1 (de) * | 1997-12-20 | 1999-07-01 | Josef Scherer | Armierung für oberflächen von bauteilen oder bauwerken |
WO2002062722A2 (de) * | 2001-02-05 | 2002-08-15 | Josef Scherer | Tragelement und tragelementanordnung, insbesondere für betonbauwerke und betonbauteile |
-
2004
- 2004-04-27 DE DE202004006742U patent/DE202004006742U1/de not_active Expired - Lifetime
-
2005
- 2005-04-18 EP EP05770875A patent/EP1819644A2/de not_active Withdrawn
- 2005-04-18 WO PCT/EP2005/004096 patent/WO2005102955A2/de not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0441297A1 (de) * | 1990-02-05 | 1991-08-14 | Sto Aktiengesellschaft | Kunstharzgebundenes Beschichtungsmaterial zum Auftragen auf Gebäudewände, vorzugsweise Kunstharzputz |
WO1999032738A1 (de) * | 1997-12-20 | 1999-07-01 | Josef Scherer | Armierung für oberflächen von bauteilen oder bauwerken |
WO2002062722A2 (de) * | 2001-02-05 | 2002-08-15 | Josef Scherer | Tragelement und tragelementanordnung, insbesondere für betonbauwerke und betonbauteile |
Also Published As
Publication number | Publication date |
---|---|
EP1819644A2 (de) | 2007-08-22 |
DE202004006742U1 (de) | 2005-10-20 |
WO2005102955A3 (de) | 2006-04-20 |
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