EP0870887B1 - Verfahren zur Sanierung von Beton - Google Patents
Verfahren zur Sanierung von Beton Download PDFInfo
- Publication number
- EP0870887B1 EP0870887B1 EP98106114A EP98106114A EP0870887B1 EP 0870887 B1 EP0870887 B1 EP 0870887B1 EP 98106114 A EP98106114 A EP 98106114A EP 98106114 A EP98106114 A EP 98106114A EP 0870887 B1 EP0870887 B1 EP 0870887B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- concrete
- mortar
- water
- renovation
- restoring
- 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.)
- Expired - Lifetime
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 6
- 239000011707 mineral Substances 0.000 claims abstract description 6
- 239000004568 cement Substances 0.000 claims description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 239000000839 emulsion Substances 0.000 claims description 2
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- 239000011440 grout Substances 0.000 claims 3
- 239000011248 coating agent Substances 0.000 claims 1
- 239000011518 fibre cement Substances 0.000 claims 1
- 238000009418 renovation Methods 0.000 abstract description 46
- 239000011888 foil Substances 0.000 abstract description 4
- 239000000470 constituent Substances 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000005067 remediation Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003701 mechanical milling Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
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
- E04G23/0203—Arrangements for filling cracks or cavities in building constructions
-
- 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
Definitions
- the invention relates to a method for the remediation of Concrete in which the damaged area is loosened by removal or unsustainable concrete components until they are reached a stable underground is exposed, the exposed Concrete surfaces moistened with water and then the damaged area with mineral renovation mortar is filled, which is then covered with a film becomes.
- Such a method is, for example, from the magazine "beton”, 4/1979, pp. 133-136.
- the first step is to remove loose or unsustainable materials Concrete components using chisels, electric hammers, High pressure water jets or mechanical milling. If reinforcement steel is exposed, it is common reinforcement steel by sandblasting make and then treat with an anti-rust paint. The bare steel on the opposite side and on the side areas where the reinforcing steel entering the concrete is usually not possible at all, as well as these areas are usually not complete can be covered with anti-corrosion paint. After this pretreatment, the exposed concrete surfaces the damaged area either moistened with water or a so-called adhesive bridge is spread. Then the damaged area is either mineral Mortar or with plastic mortar to the level the concrete surface, sometimes being the top one Layer of fine mortar is also applied.
- the invention is therefore based on the object of a method for the rehabilitation of concrete of the type mentioned at the beginning to show what a flawless and lasting Remediation of damaged areas in the concrete enables.
- the invention is therefore based on the idea of largely protecting the renovation mortar from drying out during the hydration and curing. This is achieved by combining several measures.
- the stable subsurface exposed as before by the removal of loose or unsustainable concrete components is made wet with water. After moistening the exposed concrete surfaces with water and, if necessary, applying a cement slurry as an adhesive bridge to the damaged area, the renovation mortar is applied with excess in and onto the damaged area, so that it is about 4 to 5 mm thick with a layer thickness of a few millimeters the level of the concrete surface protrudes.
- the renovation mortar is also applied beyond the damaged area to the areas of the intact concrete surface adjacent to the damaged area in a width of a few centimeters and with a layer thickness of a few millimeters.
- a bridge adhering to this is created between the renovation mortar filling the damaged area and the intact areas of the concrete surface, which bridges tear off the renovation mortar during the hydration and hardening in the border area between the subsurface and the renovation mortar prevented.
- the renovation mortar layer protruding with a layer thickness of a few millimeters above the level of the concrete surface also delays the drying out of the renovation mortar underneath.
- the entire outer surface of the renovation mortar is covered with a liquid film, which forms a closed, hardening protective film after it has been applied.
- This protective film effectively prevents evaporation of the water during the setting and hardening phase of the renovation mortar and thus prevents cracking both on the surface and at the border areas between the substrate and the renovation mortar.
- the inventive method and other advantageous Procedural measures are described below using the attached Drawing explained in more detail.
- the drawing shows a section of a concrete component to be renovated during the implementation of the various process steps.
- Levitated water is extracted using a so-called Levitation machine generated, as in Friedrich Hacheney "Levitated water in research and application", Dingfelder-Verlag, D-82346 Andechs, 2nd edition 1994, pp. 15-23, is described in more detail.
- Levitated water shows one increased willingness to absorb substances.
- numerous Experiments and observations show that levitated water colloidal solution conditions favored. It was determined, that when mixing mineral remediation mortar the bending tensile strength, especially on the basis of cement and the tensile strength increased considerably, that Shrinkage is reduced and the active and passive corrosion protection effect can be increased (see above, pp. 39 - 60).
- cement slurry 6 is then used as a bonding agent applied to the cleaned surface 1 and also the reinforcing steel 2 twice with the cement slurry 6 brushed in, these cement slurries preferably is made up with levitated water. This will achieved a significant increase in the adhesive effect. Due to the alkali content of the cement, after some Months of rust still present on the reinforcement steel 2 reshaped or rudimentary, similar to this is the case with fresh concrete.
- This renovation mortar 4 is in accordance with Figure 3 with excess introduced in and over the damaged area and that so that it is in the area of the damaged area with a layer thickness d of a few millimeters, e.g. up to 5 mm, over the plane E-E of the concrete surface 5 protrudes.
- the renovation mortar must be applied so that also the areas adjacent to the damaged area in one Width b about 3 to 4 cm and about the same Layer thickness are covered.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Description
und dem Sanierungsmörtel verhindert. Außerdem wird durch die mit einer Schichtdicke von einigen Millimetern über die Ebene der Betonoberfläche vorstehende Sanierungsmörtelschicht auch das Austrocknen des darunter befindlichen Sanierungsmörtels verzögert. Um diesem Austrocknen noch weiter vorzubeugen, wird die gesamte Außenoberfläche des Sanierungsmörtels mit einer flüssigen Folie abgedeckt, die nach ihrem Auftrag einen geschlossenen, hart werdenden Schutzfilm bildet. Durch diesen Schutzfilm wird das Verdunsten des Wassers während der Abbindeund Aushärtungsphase des Sanierungsmörtels wirksam verhindert und so eine Rißbildung sowohl an der Oberfläche als auch an den Grenzbereichen zwischen Untergrund und Sanierungsmörtel verhindert.
Claims (8)
- Verfahren zur Sanierung von Beton, bei dem die Schadstelle durch Abtragung loser oder nicht tragfähiger Betonbestandteile bis zum Erreichen eines tragfähigen Untergrundes freigelegt wird, die freigelegten Betonflächen mit Wasser angefeuchtet und anschließend die Schadstelle mit mineralischem Sanierungsmörtel gefüllt wird, der hiernach mit einer Folie abgedeckt wird, dadurch gekennzeichnet, daß der Sanierungsmörtel mit Überschuß in die Schadstelle und über diese eingebracht wird, so daß er im Bereich der Schadstelle mit einer Schichtdicke von einigen Millimetern über die Ebene der Betonoberfläche vorsteht und auch die an die Schadstelle angrenzenden Bereiche der intakten Betonoberfläche in einer Breite von einigen Zentimetern überdeckt, daß auf die gesamte Außenoberfläche des Sanierungsmörtels als Folie eine flüssige Folie aufgetragen wird und daß nach dem Aushärten des Sanierungsmörtels die über die Betonoberfläche vorstehenden Bereiche desselben abgeschliffen werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß vor dem Einbringen des Sanierungsmörtels eine Zementschlämme als Haftbrücke auf die Schadstelle aufgetragen wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Anfeuchten mit levitiertem Wasser erfolgt.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Sanierungsmörtel mit levitiertem Wasser angemacht wird.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß als Sanierungsmörtel Faserzement verwendet wird.
- Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß vom freiliegenden Bewehrungsstahl der Blattrost mechanisch entfernt und dann der Bewehrungsstahl mehrfach mit einer Zementschlämme bestrichen wird.
- Verfahren nach Anspruch 2 oder 6, dadurch gekennzeichnet, daß die Zementschlämme mit levitiertem Wasser angemacht wird.
- Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß als flüssige Folie eine Kunstharzemuision veruendet wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19714438A DE19714438C1 (de) | 1997-04-08 | 1997-04-08 | Verfahren zur Sanierung von Beton |
DE19714438 | 1997-04-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0870887A1 EP0870887A1 (de) | 1998-10-14 |
EP0870887B1 true EP0870887B1 (de) | 2003-07-02 |
Family
ID=7825771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98106114A Expired - Lifetime EP0870887B1 (de) | 1997-04-08 | 1998-04-03 | Verfahren zur Sanierung von Beton |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0870887B1 (de) |
AT (1) | ATE244344T1 (de) |
DE (2) | DE19714438C1 (de) |
ZA (1) | ZA982681B (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2830888B1 (fr) * | 2001-10-16 | 2007-01-19 | Sika | Procede de reparation d'un ouvrage de construction en maconnerie ou en beton comprenant un materiau endommage presentant au moins une zone abimee |
DE102010004247A1 (de) | 2009-01-10 | 2010-07-15 | Sonntag-Rößner, Petra | Verfahren zum Abdichten von Rissen oder Fugen in Betonbauteilen |
DE102011009264B4 (de) | 2011-01-24 | 2015-01-29 | Iwanautic S.L. | Verfahren und Anordnung eines vorgefertigten Bauelements zur Sanierung von Betonflächen |
CN113802878A (zh) * | 2021-10-27 | 2021-12-17 | 上海宝冶建筑装饰有限公司 | 水泥基自流平基层混凝土地面裂缝修补施工方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1953452A (en) * | 1931-10-28 | 1934-04-03 | Louis S Wertz | Process of repairing masonry structures |
US1926415A (en) * | 1931-10-28 | 1933-09-12 | Louis S Wertz | Apparatus for treating masonry structures |
DE3800670C1 (en) * | 1987-12-16 | 1989-03-30 | Ernst Peiniger Gmbh Unternehmen Fuer Bautenschutz, 4300 Essen, De | Process for repairing washed-concrete surfaces |
-
1997
- 1997-04-08 DE DE19714438A patent/DE19714438C1/de not_active Expired - Fee Related
-
1998
- 1998-03-31 ZA ZA9802681A patent/ZA982681B/xx unknown
- 1998-04-03 AT AT98106114T patent/ATE244344T1/de active
- 1998-04-03 DE DE59808856T patent/DE59808856D1/de not_active Expired - Lifetime
- 1998-04-03 EP EP98106114A patent/EP0870887B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0870887A1 (de) | 1998-10-14 |
DE19714438C1 (de) | 1998-07-09 |
DE59808856D1 (de) | 2003-08-07 |
ZA982681B (en) | 1998-05-14 |
ATE244344T1 (de) | 2003-07-15 |
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