EP0212429B1 - Method for the production of coating systems, stiff against shearing forces, for bridge floor steel slabs with bitumen pavement - Google Patents
Method for the production of coating systems, stiff against shearing forces, for bridge floor steel slabs with bitumen pavement Download PDFInfo
- Publication number
- EP0212429B1 EP0212429B1 EP86110822A EP86110822A EP0212429B1 EP 0212429 B1 EP0212429 B1 EP 0212429B1 EP 86110822 A EP86110822 A EP 86110822A EP 86110822 A EP86110822 A EP 86110822A EP 0212429 B1 EP0212429 B1 EP 0212429B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- asphalt
- solvent
- free
- curable
- 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
- 239000010426 asphalt Substances 0.000 title claims abstract description 53
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000011248 coating agent Substances 0.000 title claims abstract description 12
- 238000000576 coating method Methods 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 5
- 238000010008 shearing Methods 0.000 title claims abstract 4
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 35
- 239000003822 epoxy resin Substances 0.000 claims abstract description 31
- 239000000853 adhesive Substances 0.000 claims abstract description 14
- 230000001070 adhesive effect Effects 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 4
- 239000000049 pigment Substances 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 58
- 238000005260 corrosion Methods 0.000 description 18
- 239000012790 adhesive layer Substances 0.000 description 17
- 239000004848 polyfunctional curative Substances 0.000 description 17
- 230000007797 corrosion Effects 0.000 description 15
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 6
- 239000004593 Epoxy Substances 0.000 description 5
- OWYWGLHRNBIFJP-UHFFFAOYSA-N Ipazine Chemical compound CCN(CC)C1=NC(Cl)=NC(NC(C)C)=N1 OWYWGLHRNBIFJP-UHFFFAOYSA-N 0.000 description 5
- 230000006378 damage Effects 0.000 description 5
- 239000013521 mastic Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 239000011384 asphalt concrete Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 238000004380 ashing Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
Definitions
- the present invention relates to a method for producing shear-resistant coating systems for steel road slabs with asphalt surfaces using epoxy resins.
- the object of the invention is to develop a method for producing shear-resistant coating systems for steel roadway slabs with asphalt surfaces, which glued over the whole area without grit scattering ensure a permanent connection between the roadway plates and the asphalt surface.
- This coating system should be easy and reliable to apply and should be comparable in cost to the previous systems.
- the steel sheets are preferably cleaned so that they are suitable for the application of anti-corrosion agents, in particular anti-corrosion agents based on epoxy resins.
- the cleaned steel surfaces should therefore correspond to the standard cleanliness level SA 2 1/2 or F1 according to DIN 55928, part 4.
- the corrosion protection layer a) made of solvent-free, thermally curable epoxy resin can contain the usual active corrosion protection pigments or fillers. However, this addition can be dispensed with entirely in the process according to the invention. In addition, the application of the corrosion protection layer can even be dispensed with entirely and the adhesive bridge made of solvent-free, elasticized epoxy resin can be applied directly. However, since the application of a corrosion protection layer is usually required by the authorities, the solvent-free, thermally curable epoxy resin layer with or without active corrosion protection pigments or fillers is generally used according to the invention.
- the adhesive bridge b) made of solvent-free, elasticized epoxy resin is preferably produced from a base resin and an elasticizing component and an elasticizing hardener mixture.
- a polymer-modified bitumen is preferably also added to the hardener mixture.
- the adhesive layer c which consists of a solvent-free, two-stage curable epoxy resin.
- This two-stage hardenable epoxy resin should harden to a walkable layer at temperatures between 5 and 60 ° C and only melt and melt when the hot asphalt is applied Only then crosslink to an elastic layer.
- This adhesive layer is generally suitable for permanently bonding hardened epoxy resins and hot applied asphalt layers to one another over the entire surface.
- Such two-stage curable epoxy resins have so far only been used in systems that required good paint properties and high solvent resistance.
- the films initially created are mostly brittle and adhere poorly to the surface.
- hot asphalt when hot asphalt is applied, they react in such a way that they melt thermoplastic and only then crosslink to form an elastic layer. They are then able to permanently bond to both the already hardened epoxy layer of the adhesive bridge b) and the asphalt layer.
- this adhesive layer c penetrates the asphalt layer more or less irregularly and then permanently connects to it. Particularly good and permanent connections are created when the asphalt layer contains a certain proportion of polymer-modified bitumen.
- the adhesive layer used according to the invention is also able to permanently bind hot-applied poured asphalt or asphalt concrete, even if. these do not contain a fraction of polymer-modified bitumen.
- the adhesive layer of the solvent-free, two-stage curable epoxy resin used in accordance with the invention is thus able to permanently bond the layers of hardened epoxy resins and asphalt layers, which are inherently incompatible and therefore adhere poorly to one another.
- the hot asphalt layer d) can of course consist in the usual way of one layer or of several layers, in which case one speaks of a lower protective layer and an upper covering layer.
- the desired wearing course can be selected as the upper surface layer, which can be easily applied to mastic asphalt or asphalt concrete.
- the coating systems according to the invention are distinguished by excellent mechanical and thermal stability and can be reliably produced in a particularly simple manner.
- the corrosion layer a), the adhesive bridge b) and the adhesive layer c) are applied in the usual manner at normal temperatures and harden after only a few hours so that they can be walked on. The next layer can then be applied without any problems. As soon as the adhesive layer c) has been applied and cured for a few hours, the hot asphalt layer can be applied immediately.
- the corrosion layer made of solvent-free, thermally curable epoxy resin is bonded to the cleaned steel sheets much more firmly than would be possible without thermal aftertreatment.
- the layer thicknesses in the corrosion protection layer a) are 0 to 200 ⁇ m, preferably 130 to 170 ⁇ m.
- the layer thickness of the adhesive bridge b) is usually 1000 to 3000 microns. For cost reasons, efforts will be made to choose this layer thickness in the range between 1000 and 1500 ⁇ m.
- the layer thickness of the adhesive layer c) is generally 150 to 400 ⁇ m, preferably 200 to 300 ⁇ m.
- the asphalt layers d) are chosen in the usual range between 2 and 10 cm, depending on which one. Stress these asphalt surfaces are to be exposed.
- All epoxy resin layers a), b) and c) should be applied at temperatures of at least 5 ° C, preferably at least 7 ° C.
- the relative air humidity should not exceed 85% so that there is no condensation build-up.
- the second curing stage of the adhesive layer c) begins at 70 to 90 ° C, depending on the composition of the epoxy resin used.
- the adhesive layer melts thermoplastic and crosslinks to its elastic final state.
- the corrosion protection layer is thus first applied, with customary two-component epoxy resins mixed with hardener being mixed without solvent and preferably without fillers and active corrosion protection pigments and being applied by spraying, rolling or brushing.
- customary two-component epoxy resins mixed with hardener being mixed without solvent and preferably without fillers and active corrosion protection pigments and being applied by spraying, rolling or brushing.
- this layer is recommended to apply this layer with lambskin rollers (short-fiber) or flat brushes in a cloister.
- This layer can be walked on after 4 to 8 hours of room temperature and can be coated with the next layer, namely adhesive bridge b).
- This adhesive bridge b) is produced from the epoxy resin component and the hardener and is preferably applied uniformly with a doctor blade.
- the resin component is preferably produced by mixing a base resin and an elasticizing, low-viscosity resin.
- Two-stage reacting hardeners or hardener mixtures are preferably used as hardeners, which in turn are preferably blended with polymer-modified bitumen. This addition leads to increased waterproofness, improved flexibility due to the softening effect of the bitumen and improved bondability with the other layers. After approx. 6 to 10 hours this adhesive bridge can be walked on and can be coated with the next layer, namely the adhesive layer c).
- the adhesive layer c) consists of a two-stage hardenable epoxy resin system and is preferably mixed with a two-stage hardener. Like the corrosion protection layer, this layer can also be applied by spraying or rolling. That has proven itself above all Apply with lambskin rolls. After a minimum of 6 hours and a maximum of 72 hours, the hot asphalt layer is then applied to this layer. If the time between the application of the adhesive layer and the asphalt layer is more than 72 hours, it is advisable to apply another layer of the adhesive layer c).
- the permanent threshold bending test was also carried out and the test conditions were also tightened by 50% and 100%.
- the system was fully stable in up to 50% more severe conditions.
- a crack in the mastic asphalt layer was shown after approximately 500,000 load cycles, ie: the adhesion of the covering to the steel sheet is greater than the internal strength of the mastic asphalt.
- Testing the system at high and low temperatures showed that the system is flexible, but has no plastic deformation. It absorbs the tension elastically and thus prevents the formation of damage.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Road Paving Structures (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
- Laminated Bodies (AREA)
- Road Repair (AREA)
Abstract
Description
Gegenstand der vorliegenden Erfindung ist ein Verfahren zur Herstellung von schubsteifen Beschichtungssystemen für stählerne Fahrbahnplatten mit Asphaltdecken unter Verwendung von Epoxidharzen.The present invention relates to a method for producing shear-resistant coating systems for steel road slabs with asphalt surfaces using epoxy resins.
Stahlbrücken besitzen fast ausnahmslos bituminöse Beläge, die das Bauwerk dauerhaft gegen Einflüsse aus Witterung und aggressiven Substanzen schützen und im Verkehr eine sicher und komförtabel befahrbare Oberfläche bieten. Es kommt aber immer wieder zu Schäden an Brückenbelägen, die ihre Ursachen in der Verarbeitung, im Baustoff und in den konstruktiven Eigenschaften des Bauwerks, insbesondere Schwingungsempfindlichkeit und Weichheit, haben. Die hierdurch verursachten außerordentlich hohen Unterhaltskosten, verbunden mit immer problematischer werdenden Verkehrseinschränkungen, bedeuten insgesamt einen erheblichen volkswirtschaftlichen Schaden.Almost without exception, steel bridges have bituminous coverings that permanently protect the structure against the effects of weather and aggressive substances and provide a safe and easy-to-drive surface in traffic. But there is always damage to bridge coverings, which have their causes in the processing, in the building material and in the structural properties of the structure, in particular vibration sensitivity and softness. The extraordinarily high maintenance costs caused by this, combined with increasingly problematic traffic restrictions, mean considerable economic damage overall.
Es war bisher üblich, die korrosionsgeschützten Stahlbleche mit einer Mastix-Zwischenschicht und Splittabstreuung mit der Asphaltdecke zu verkleben. Derartige Beschichtungssysteme sind jedoch nicht schubsteif und führen zu vorzeitigen Verformungen und Verschleißerscheinungen.It has previously been customary to glue the corrosion-protected steel sheets to the asphalt surface with a mastic intermediate layer and grit scattering. However, such coating systems are not shear-resistant and lead to premature deformation and signs of wear.
Aus der FR-A-2431571 ist ein Verfahren zur Beschichtung stählerner Fahrbahnplatten bekannt, wobei auf die gereinigten Stahlbleche nacheinander
- - eine Korrosionsschutzschicht aus lösungsmittelfreiem, thermisch nachhärtbarem Epoxidharz,
- - eine Haftschicht aus kornförmigem, thermoplastischem Material und
- - eine heiße Asphaltschicht aufgebracht werden.
- - a corrosion protection layer made of solvent-free, thermally curable epoxy resin,
- - An adhesive layer made of granular, thermoplastic material and
- - Apply a hot layer of asphalt.
Es ist weiterhin bekannt, stählerne Fahrbahnplatten mit einer Epoxidharzschicht zu versehen, diese mit Splitt abzustreuen und dann die Asphaltdecke aufzugeben, wodurch eine mechanische Verklammerung der Asphaltschicht auf der Epoxidharzschicht erreicht werden soll. Durch die Splittabstreuung kann es zur Verletzung der Epoxidschicht und der Korrosionsschutzschicht kommen.It is also known to provide steel road slabs with an epoxy resin layer, to sprinkle them with chippings and then to give up the asphalt surface, whereby mechanical ashing of the asphalt layer on the epoxy resin layer is to be achieved. The scattering of chippings can damage the epoxy layer and the corrosion protection layer.
Dies kann die Korrosion und Zerstörung der Asphaltdecke beschleunigen.This can accelerate the corrosion and destruction of the asphalt surface.
Da selbst getrockneter Splitt noch Restfeuchte besitzt und auch nach Abstreuung wieder Feuchtigkeit aufnimmt, kann dieser unter der Einwirkung von heißem Asphalt Dampfblasen bilden, so daß es zu keiner dauerhaften Verklammerung des Splitts mit dem Asphalt kommt. Sollte hingegen auf die Verwendung von Splittabstreuung verzichtet werden, liegt der Asphalt lose auf der Epoxidschicht auf, weil keine ganzflächige Verbindung zwischen der Epoxidschicht und der Asphaltdecke möglich ist. Eine nicht mit der Stahlplatte fest verbundene Asphaltdecke hat jedoch nur eine relativ kurze Lebensdauer.Since even dried chippings still have residual moisture and absorbs moisture even after scattering, they can form steam bubbles under the influence of hot asphalt, so that there is no permanent clinging of the chippings to the asphalt. If, on the other hand, the use of grit scattering is not used, the asphalt lies loosely on the epoxy layer, because no full-surface connection between the epoxy layer and the asphalt surface is possible. However, an asphalt surface that is not firmly attached to the steel plate has a relatively short lifespan.
Die Erfindung hat sich die Aufgabe gestellt, ein Verfahren zur Herstellung von schubsteifen Beschichtungssystemen für stählerne Fahrbahnplatten mit Asphaltdecken zu entwickeln, welche ohne Splittabstreuung ganzflächig verklebt eine dauerhafte Verbindung zwischen den Fahrbahnplatten und der Asphaltdecke gewährleisten. Dabei sollte dieses Beschichtungssystem einfach und zuverlässig auftragbar sein und kostenmäßig mit den bisherigen Systemen vergleichbar bleiben.The object of the invention is to develop a method for producing shear-resistant coating systems for steel roadway slabs with asphalt surfaces, which glued over the whole area without grit scattering ensure a permanent connection between the roadway plates and the asphalt surface. This coating system should be easy and reliable to apply and should be comparable in cost to the previous systems.
Diese Aufgabe konnte überraschenderweise dadurch gelöst werden, daß auf die gereinigten Stahlbleche nacheinander
- a) eine Korrosionsschutzschicht aus lösungsmittelfreiem, thermisch nachhärtbarem Epoxidharz,
- b) eine Haftbrücke aus lösungsmittelfreiem, elastifiziertem Epoxidharz,
- c) eine Haftschicht aus lösungsmittelfreiem, zweistufig härtbarem Epoxidharz und
- d) eine heiße Asphaltschicht aufgebracht werden.
- a) a corrosion protection layer made of solvent-free, thermally curable epoxy resin,
- b) an adhesive bridge made of solvent-free, elasticized epoxy resin,
- c) an adhesive layer of solvent-free, two-stage curable epoxy resin and
- d) a hot asphalt layer can be applied.
Die Stahlbleche werden vorzugsweise so gereinigt, daß sie für die Auftragung von Korrosionsschutzmitteln, insbesondere Korrosionsschutzmitteln auf Basis von Epoxidharzen, geeignet sind. Die gereinigten Stahloberflächen sollten daher dem Norm-Reinheitsgrad SA 2 1/2 bzw. F1 nach DIN 55928, Teil 4, entsprechen.The steel sheets are preferably cleaned so that they are suitable for the application of anti-corrosion agents, in particular anti-corrosion agents based on epoxy resins. The cleaned steel surfaces should therefore correspond to the standard cleanliness level SA 2 1/2 or F1 according to DIN 55928, part 4.
Die Korrosionsschutzschicht a) aus lösungsmittelfreiem, thermisch nachhärtbarem Epoxidharz kann die üblichen aktiven Korrosionsschutzpigmente bzw. -füllstoffe enthalten. Bei dem erfindungsgemäßen Verfahren kann jedoch auf diesen Zusatz völlig verzichtet werden. Darüber hinaus kann sogar auf die Aufbringung der Korrosionsschutzschicht völlig verzichtet werden und unmittelbar die Haftbrücke aus lösungsmittelfreiem, elastifiziertem Epoxidharz aufgebracht werden. Da jedoch meist behördlich die Aufbringung einer Korrosionsschutzschicht gefordert wird, wird erfindungsgemäß im allgemeinen die lösungsmittelfreie, thermisch nachhärtbare Epoxidharzschicht mit oder ohne aktive Korrosionsschutzpigmente oder -füllstoffe eingesetzt.The corrosion protection layer a) made of solvent-free, thermally curable epoxy resin can contain the usual active corrosion protection pigments or fillers. However, this addition can be dispensed with entirely in the process according to the invention. In addition, the application of the corrosion protection layer can even be dispensed with entirely and the adhesive bridge made of solvent-free, elasticized epoxy resin can be applied directly. However, since the application of a corrosion protection layer is usually required by the authorities, the solvent-free, thermally curable epoxy resin layer with or without active corrosion protection pigments or fillers is generally used according to the invention.
Die Haftbrücke b) aus lösungsmittelfreiem, elastifiziertem Epoxidharz wird vorzugsweise aus einem Basisharz und einer elastifizierenden Komponente sowie einem elastifizierendem Härtergemisch hergestellt. Dem Härtergemisch wird vorzugsweise noch ein polymermodifiziertes Bitumen beigemischt.The adhesive bridge b) made of solvent-free, elasticized epoxy resin is preferably produced from a base resin and an elasticizing component and an elasticizing hardener mixture. A polymer-modified bitumen is preferably also added to the hardener mixture.
Von besonderer Bedeutung für das erfindungsgemäße Verfahren ist die Haftschicht c), welche aus einem lösungsmittelfreien, zweistufig härtbaren Epoxidharz besteht.Of particular importance for the process according to the invention is the adhesive layer c), which consists of a solvent-free, two-stage curable epoxy resin.
Dieses zweistufig härtbare Epoxidharz soll bei Temperaturen zwischen 5 und 60 °C zu einer begehbaren Schicht aushärten und erst beim Aufbringen des heißen Asphalts thermoplastisch aufschmelzen und erst danach zu einer elastischen Schicht vernetzen. Diese Haftschicht ist generell geeignet, gehärtete Epoxidharze und heiß aufgetragene Asphaltschichten dauerhaft ganzflächig miteinander zu verbinden. Derartige zweistufig härtbare Epoxidharze wurden bisher nur verwendet in Systemen, die gute lacktechnische Eigenschaften und hohe Lösungsmittelfestigkeit verlangten. Die dabei zunächst entstehenden Filme sind meist spröde und haften schlecht auf dem Untergrund. Überraschenderweise reagieren sie jedoch beim Aufbringen von heißem Asphalt in der Weise, daß sie thermoplastisch aufschmelzen und erst danach zu einer elastischen Schicht vernetzen. Dabei sind sie dann in der Lage, sowohl mit der bereits gehärteten Epoxidschicht der Haftbrücke b) als auch mit der Asphaltschicht dauerhaft zu verkleben. Untersuchungen dieser Schichtstruktur haben gezeigt, daß diese Haftschicht c) mehr oder weniger unregelmäßig in die Asphaltschicht eindringt und sich dort dann dauerhaft mit ihr verbindet. Besonders gute und dauerhafte Verbindungen entstehen, wenn die Asphaltschicht einen gewissen Anteil an polymermodifiziertem Bitumen enthält. Die erfindungsgemäß eingesetzte Haftschicht ist jedoch auch in der Lage, heiß aufgebrachten Gußasphalt oder Asphaltbeton dauerhaft zu binden, selbst wenn. diese keine Fraktion an polymermodifiziertem Bitumen enthalten. Die erfindungsgemäß verwendete Haftschicht aus dem lösungsmittelfreien, zweistufig härtbaren Epoxidharz ist somit in der Lage, die an sich unverträglichen und deshalb schlecht miteinander haftenden Schichten von gehärteten Epoxidharzen und Asphaltschichten dauerhaft miteinander zu verbinden.This two-stage hardenable epoxy resin should harden to a walkable layer at temperatures between 5 and 60 ° C and only melt and melt when the hot asphalt is applied Only then crosslink to an elastic layer. This adhesive layer is generally suitable for permanently bonding hardened epoxy resins and hot applied asphalt layers to one another over the entire surface. Such two-stage curable epoxy resins have so far only been used in systems that required good paint properties and high solvent resistance. The films initially created are mostly brittle and adhere poorly to the surface. Surprisingly, however, when hot asphalt is applied, they react in such a way that they melt thermoplastic and only then crosslink to form an elastic layer. They are then able to permanently bond to both the already hardened epoxy layer of the adhesive bridge b) and the asphalt layer. Investigations of this layer structure have shown that this adhesive layer c) penetrates the asphalt layer more or less irregularly and then permanently connects to it. Particularly good and permanent connections are created when the asphalt layer contains a certain proportion of polymer-modified bitumen. However, the adhesive layer used according to the invention is also able to permanently bind hot-applied poured asphalt or asphalt concrete, even if. these do not contain a fraction of polymer-modified bitumen. The adhesive layer of the solvent-free, two-stage curable epoxy resin used in accordance with the invention is thus able to permanently bond the layers of hardened epoxy resins and asphalt layers, which are inherently incompatible and therefore adhere poorly to one another.
Die heiß aufgetragene Asphaltschicht d) kann selbstverständlich in üblicher Weise aus einer Schicht oder aus mehreren Schichten bestehen, wobei man dann von einer unteren Schutzschicht und einer oberen Deckschicht spricht. Als obere Deckschicht können die jeweils gewünschten Verschleißdecken gewählt werden, die auf Gußasphalt oder Asphaltbeton problemlos aufgetragen werden können.The hot asphalt layer d) can of course consist in the usual way of one layer or of several layers, in which case one speaks of a lower protective layer and an upper covering layer. The desired wearing course can be selected as the upper surface layer, which can be easily applied to mastic asphalt or asphalt concrete.
Die erfindungsgemäßen Beschichtungssysteme zeichnen sich durch ausgezeichnete mechanische und thermische Stabilität aus und können in besonders einfacher Weise zuverlässig hergestellt werden. Die Korrosionsschicht a), die Haftbrücke b) und die Haftschicht c) werden bei Normaltemperaturen in üblicher Weise aufgetragen und härten bereits nach wenigen Stunden so aus, daß sie begehbar sind. Es kann danach problemlos die jeweils nächste Schicht aufgetragen werden. Sobald die Haftschicht c) aufgetragen und einige Stunden ausgehärtet ist, kann unmittelbar die heiße Asphaltschicht aufgebracht werden.The coating systems according to the invention are distinguished by excellent mechanical and thermal stability and can be reliably produced in a particularly simple manner. The corrosion layer a), the adhesive bridge b) and the adhesive layer c) are applied in the usual manner at normal temperatures and harden after only a few hours so that they can be walked on. The next layer can then be applied without any problems. As soon as the adhesive layer c) has been applied and cured for a few hours, the hot asphalt layer can be applied immediately.
Die Korrosionsschicht aus lösungsmittelfreiem, thermisch härtbarem Epoxidharz wird bei dieser thermischen Nachbehandlung wesentlich fester mit den gereinigten Stahlblechen verbunden, als dies ohne thermische Nachbehandlung möglich wäre.In this thermal aftertreatment, the corrosion layer made of solvent-free, thermally curable epoxy resin is bonded to the cleaned steel sheets much more firmly than would be possible without thermal aftertreatment.
Die Schichtdicken betragen in der Korrosionsschutzschicht a) 0 bis 200 µm, vorzugsweise 130 bis 170 wm.The layer thicknesses in the corrosion protection layer a) are 0 to 200 μm, preferably 130 to 170 μm.
Die Schichtdicke der Haftbrücke b) beträgt meist 1000 bis 3000 µm. Aus Kostengründen wird man sich bemühen, diese Schichtdicke im Bereich zwischen 1000 und 1500 µm zu wählen.The layer thickness of the adhesive bridge b) is usually 1000 to 3000 microns. For cost reasons, efforts will be made to choose this layer thickness in the range between 1000 and 1500 μm.
Die Schichtdicke der Haftschicht c) beträgt im allgemeinen 150 bis 400 wm, vorzugsweise 200 bis 300 jim.The layer thickness of the adhesive layer c) is generally 150 to 400 μm, preferably 200 to 300 μm.
Die Asphaltschichten d) werden in dem üblichen Bereich zwischen 2 und 10 cm gewählt, je nachdem, welchen. Beanspruchungen diese Asphaltdecken ausgesetzt werden sollen.The asphalt layers d) are chosen in the usual range between 2 and 10 cm, depending on which one. Stress these asphalt surfaces are to be exposed.
Alle Epoxidharzschichten a), b) und c) sollten bei Temperaturen von mindestens 5 °C, vorzugsweise mindestens 7 °C aufgetragen werden. Die relative Luftfeuchtigkeit sollte dabei 85 % nicht überschreiten, damit es nicht zu Kondenzwasserablagerungen kommt. Die zweite Aushärtungsstufe der Haftschicht c) setzt, je nach Zusammensetzung des verwendeten Epoxidharzes, bei 70 bis 90 °C ein. Bei den Temperaturen des heißen Asphalts, nämlich 100 bis 200 °C beim Asphaltbeton und 220 bis 280 °C beim Gußasphalt, schmilzt die Haftschicht thermoplastisch auf und vernetzt dabei zu ihrem elastischen Endzustand.All epoxy resin layers a), b) and c) should be applied at temperatures of at least 5 ° C, preferably at least 7 ° C. The relative air humidity should not exceed 85% so that there is no condensation build-up. The second curing stage of the adhesive layer c) begins at 70 to 90 ° C, depending on the composition of the epoxy resin used. At the temperatures of the hot asphalt, namely 100 to 200 ° C for asphalt concrete and 220 to 280 ° C for mastic asphalt, the adhesive layer melts thermoplastic and crosslinks to its elastic final state.
Zur Durchführung des erfindungsgemäßen Verfahrens wird somit zunächst die Korrosionsschutzschicht aufgetragen, wobei übliche, mit Härter vermischte ZweikomponentenEpoxidharze ohne Lösungsmittel und vorzugsweise ohne Füllstoffe und aktive Korrosionsschutzpigmente miteinander vermischt und durch Spritzen, Rollen oder Bürsten aufgetragen werden. Um etwaige Unebenheiten der Stahloberfläche richtig auszufüllen, wird empfohlen, diese Schicht mit Lammfellrollen (kurzfaserig) oder Flächenstreichbürsten im Kreuzgang vorzunehmen.To carry out the method according to the invention, the corrosion protection layer is thus first applied, with customary two-component epoxy resins mixed with hardener being mixed without solvent and preferably without fillers and active corrosion protection pigments and being applied by spraying, rolling or brushing. In order to properly fill in any unevenness in the steel surface, it is recommended to apply this layer with lambskin rollers (short-fiber) or flat brushes in a cloister.
Diese Schicht ist nach 4 bis 8 Stunden Raumtemperatur begehbar und kann mit der nächsten Schicht, nämlich Haftbrücke b), beschichtet werden.This layer can be walked on after 4 to 8 hours of room temperature and can be coated with the next layer, namely adhesive bridge b).
Diese Haftbrücke b) wird aus der Epoxidharzkomponente und dem Härter hergestellt und vorzugsweise mit Rakeln gleichmäßig aufgetragen. Die Harzkomponente wird vorzugsweise durch Vermischen eines Grundharzes und eines elastifizierenden, niedrigviskosen Harzes hergestellt. Als Härter werden vorzugsweise zweistufig reagierende Härter oder Härtergemische eingesetzt, die wiederum vorzugsweise mit polymermodifiziertem Bitumen verschnitten sind. Dieser Zusatz führt zu einer erhöhten Wasserdichtigkeit, einer verbesserten Flexibilität durch die Weichmachwirkung des Bitumens und einer verbesserten Verklebbarkeit mit den übrigen Schichten. Nach ca. 6 bis 10 Stunden ist diese Haftbrücke begehbar und kann mit der nächsten Schicht, nämlich der Haftschicht c), beschichtet werden.This adhesive bridge b) is produced from the epoxy resin component and the hardener and is preferably applied uniformly with a doctor blade. The resin component is preferably produced by mixing a base resin and an elasticizing, low-viscosity resin. Two-stage reacting hardeners or hardener mixtures are preferably used as hardeners, which in turn are preferably blended with polymer-modified bitumen. This addition leads to increased waterproofness, improved flexibility due to the softening effect of the bitumen and improved bondability with the other layers. After approx. 6 to 10 hours this adhesive bridge can be walked on and can be coated with the next layer, namely the adhesive layer c).
Die Haftschicht c) besteht aus einem zweistufig aushärtbaren Epoxidharzsystem und wird vorzugsweise mit einem zweistufig wirksamen Härter vermischt. Auch diese Schicht kann wiederum wie die Korrosionsschutzschicht durch Spritzen oder Rollen aufgetragen werden. Bewährt hat sich vor allem das Auftragen mit Lammfellrollen. Nach mindestens 6 Stunden und maximal 72 Stunden wird auf diese Schicht dann die heiße Asphaltschicht aufgetragen. Sollte die Zeit zwischen dem Aufbringen der Haftschicht und der Asphaltschicht mehr als 72 Stunden betragen, empfiehlt es sich, eine weitere Schicht der Haftschicht c) aufzutragen.The adhesive layer c) consists of a two-stage hardenable epoxy resin system and is preferably mixed with a two-stage hardener. Like the corrosion protection layer, this layer can also be applied by spraying or rolling. That has proven itself above all Apply with lambskin rolls. After a minimum of 6 hours and a maximum of 72 hours, the hot asphalt layer is then applied to this layer. If the time between the application of the adhesive layer and the asphalt layer is more than 72 hours, it is advisable to apply another layer of the adhesive layer c).
In dem nachfolgenden Beispiel ist das erfindungsgemäße Verfahren und ein dabei entstehendes Beschichtungssystem näher erläutert:The process according to the invention and a coating system which arises in this way are explained in more detail in the example below:
- a) Auf gereinigte Stahlflächen wurde eine Korrosionsschutzschicht aufgetragen, die durch Zusammenmischen von 78,1 Gew.-% der Harzkomponente A und 21,9 Gew.-% der Härterkomponente B entstanden war. Die Komponente A bestand aus 84 Gew.-% des Harzes BY 154 (Ciba Geigy 187) und 16 Gew.-% des ReaktivVerdünners RV 1806 (Ems 14). Die Komponente B bestand aus dem Härter H 82018 (Ems). Dabei handelt es sich um einen cycloaliphatischen Polyaminhärter, der thermisch nachgehärtet werden kann.a) An anti-corrosion layer was applied to cleaned steel surfaces, which had been created by mixing together 78.1% by weight of resin component A and 21.9% by weight of hardener component B. Component A consisted of 84% by weight of BY 154 resin (Ciba Geigy 187) and 16% by weight of RV 1806 reactive diluent (Ems 14). Component B consisted of hardener H 82018 (Ems). It is a cycloaliphatic polyamine hardener that can be post-cured thermally.
- b) Die Haftbrücke b) wurde aus 76,9 Gew.-% der Komponente A (Harz) und 23,1 Gew.-% der Komponente B (Härter) hergestellt. Die Komponente A bestand zu 60 Gew.-% aus dem Harz GY 298 (Ciba Geigy) und zu 40 Gew.-% aus dem Harz BY 154 (Ciba Geigy). Die Härterkomponente B bestand aus der Komponente B 1, enthaltend 58,3 Gew.-% des Härters HY 840 (Ciba Geigy), 18,4 Gew.-% des Härters HY 2958 (Ciba Geigy) und 23,3 polymermodifiziertem Bitumen. Dieses polymermodifizierte Bitumen bestand aus der Komponente B 2, enthaltend 48,85 Gew.-% Bitumen B 200, 1,15 Gew.-% des Teleblockcopolymeren S 416 und 50 Gew.-% des Oels Nigrex 929. Dieses Material wurde unter Vermeidung von Blaseneinschlüssen homogen miteinander vermischt und mit einer Spachtel 1 bis 1,5 mm stark aufgetragen. Es war nach einigen Stunden begehbar.b) The adhesive bridge b) was produced from 76.9% by weight of component A (resin) and 23.1% by weight of component B (hardener). Component A consisted of 60% by weight of the resin GY 298 (Ciba Geigy) and 40% by weight of the resin BY 154 (Ciba Geigy). Hardener component B consisted of component B 1, containing 58.3% by weight of hardener HY 840 (Ciba Geigy), 18.4% by weight of hardener HY 2958 (Ciba Geigy) and 23.3 polymer-modified bitumen. This polymer-modified bitumen consisted of component B 2, containing 48.85% by weight of bitumen B 200, 1.15% by weight of the teleblock copolymer S 416 and 50% by weight of the oil Nigrex 929. This material was avoided while avoiding Bubble inclusions mixed homogeneously with each other and applied with a spatula 1 to 1.5 mm thick. It was walkable after a few hours.
- c) Die Haftschicht c) bestand aus 80 Gew.-% der Komponente A (Harz) und 20 Gew.-% der Komponente B (Härter). Die Komponente A (Harz) bestand aus dem Harz Ep 776 (Schering), das bereits mehrere verschieden schnell abbindende Epoxidkomponenten enthält. Die Komponente B bestand aus dem Härter Ed 40 (Schering). Die beiden Komponenten wurden vermischt und mit einer Lammfellbürste aufgetragen. Sie lieferten nach einigen Stunden eine begehbare sprödharte Schicht, auf die höchstens nach 6 und spätestens nach 72 Stunden eine heiße Asphaltschicht aufgetragen werden konnte.c) The adhesive layer c) consisted of 80% by weight of component A (resin) and 20% by weight of component B (hardener). Component A (resin) consisted of Ep 776 (Schering) resin, which already contains several epoxy components that set at different speeds. Component B consisted of hardener Ed 40 (Schering). The two components were mixed and applied with a lambskin brush. After a few hours, they provided a hard, brittle, walkable layer to which a hot asphalt layer could be applied after 6 hours at the latest and after 72 hours at the latest.
Das so erhaltene Beschichtungssystem wurde geprüft. Folgende Eigenschaften wurden gefunden:
Weiterhin wurde die Dauerschwellbiegeprüfung durchgeführt und zusätzlich die Prüfbedingungen um 50 % und 100 % verschärft. Bei bis zu 50 % verschärften Bedingungen war das System voll haltbar. Bei der um 100 % verschärften Prüfung der Durchbiegung zeigte sich nach ca. 500.000 Lastspielen ein Abriß in der Gußasphaltschicht, d.h: die Haftung des Belages auf dem Stahlblech ist größer als die innere Festigkeit des Gußasphalts. Die Prüfung des Systems bei hohen und tiefen Temperaturen zeigte, daß das System zwar flexibel ist, aber keine plastischen Deformationen aufweist. Es nimmt die Spannungen elastisch auf und verhindert so die Bildung von Schäden.The permanent threshold bending test was also carried out and the test conditions were also tightened by 50% and 100%. The system was fully stable in up to 50% more severe conditions. In the 100% tightening of the deflection test, a crack in the mastic asphalt layer was shown after approximately 500,000 load cycles, ie: the adhesion of the covering to the steel sheet is greater than the internal strength of the mastic asphalt. Testing the system at high and low temperatures showed that the system is flexible, but has no plastic deformation. It absorbs the tension elastically and thus prevents the formation of damage.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT86110822T ATE53873T1 (en) | 1985-08-08 | 1986-08-05 | PROCESS FOR MANUFACTURING RIGID COATING SYSTEMS FOR STEEL ROAD PANELS WITH ASPHALT COVERINGS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3528491 | 1985-08-08 | ||
| DE3528491 | 1985-08-08 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0212429A2 EP0212429A2 (en) | 1987-03-04 |
| EP0212429A3 EP0212429A3 (en) | 1987-10-07 |
| EP0212429B1 true EP0212429B1 (en) | 1990-05-02 |
Family
ID=6278040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP86110822A Expired - Lifetime EP0212429B1 (en) | 1985-08-08 | 1986-08-05 | Method for the production of coating systems, stiff against shearing forces, for bridge floor steel slabs with bitumen pavement |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0212429B1 (en) |
| AT (1) | ATE53873T1 (en) |
| DE (1) | DE3670869D1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1034071C2 (en) * | 2007-07-02 | 2009-01-05 | Ballast Nedam Infra B V | Reinforced steel bridge. |
| EP2281948B1 (en) | 2009-07-07 | 2012-11-07 | Sika Technology AG | Road structure with improved adhesion |
| CN116333679A (en) * | 2023-03-20 | 2023-06-27 | 北京东方雨虹防水技术股份有限公司 | Solvent-free asphalt coiled material cold adhesive, preparation and high-adhesion waterproof system and construction method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3333517A (en) * | 1964-10-27 | 1967-08-01 | Jeerbau Ges Fur Strassenbau M | Method of bonding pavements to concrete or steel subsurfaces |
| FR2365661A1 (en) * | 1976-09-22 | 1978-04-21 | Screg Routes & Travaux | Bridge road surface sealing coating - comprises mutually impregnated heat hardened base, reinforcing layer and different top layer (BE 21.3.78) |
| FR2431571A1 (en) * | 1978-07-18 | 1980-02-15 | Screg Routes & Travaux | Waterproof coating for works of art - in cement prestressed concrete or metal, comprises thermosetting layer and heat-fusible material layer |
-
1986
- 1986-08-05 DE DE8686110822T patent/DE3670869D1/en not_active Expired - Fee Related
- 1986-08-05 AT AT86110822T patent/ATE53873T1/en not_active IP Right Cessation
- 1986-08-05 EP EP86110822A patent/EP0212429B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0212429A2 (en) | 1987-03-04 |
| DE3670869D1 (en) | 1990-06-07 |
| EP0212429A3 (en) | 1987-10-07 |
| ATE53873T1 (en) | 1990-06-15 |
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