Method for the application of calcium hydroxide onto an asphalt interlayer for surfacing structures

Abstract

The invention relates to a method for the application of calcium hydroxide onto an asphalt interlayer (5) which is incorporated into a layer system of a surfacing structure. The asphalt interlayer (5) is produced in the factory and wound to a roll (1), transported to a construction site and there clamped on a paving machine. Then, the roll (1) is unrolled and placed on an underlayer surface (3) of the surfacing structure and pressed by the paving machine and / or a possible separate roller, and a new cover layer is then introduced on the underlayer surface (3) processed in this manner. The calcium hydroxide is applied to the asphalt interlayer (5) by means of a dispensing device in the manufacturing factory and / or at the construction site – wherein, if it is applied at the construction site, the dispensing device is arranged on the paving machine and / or on the possible separate roller and / or is carried by means a trailer of the paving machine / roller or together with the paving machine / roller. The calcium hydroxide is applied to at least the surface of the asphalt interlayer (5) which in situ can be driven over by the construction site traffic prior to introduction of the new cover layer.

Description

Process for applying calcium hydroxide to an asphalt inlay for paving structures

[0001] The present invention relates to a method for applying calcium hydroxide (Ca(OH)2) to an asphalt pavement intended for incorporation into the layer system of a pavement construction for traffic areas and / or building surfaces. Furthermore, the invention relates to a layering device or a roller, a retrofit kit, and the use of a layering device, a roller, or a retrofit kit for applying calcium hydroxide to an asphalt pavement on the construction site. According to a further aspect of the invention, this relates to an asphalt pavement produced ex situ or an asphalt pavement wound as a roll. Furthermore, the invention relates to the use of calcium hydroxide for application to an asphalt pavement. The invention refers to all subsequent explanations, which it incorporates integrally.

[0002] Constantly increasing traffic volumes and the increase in heavy goods traffic are placing significant strain on the pavement structures of road surfaces. Excessive stress leads to deformation and cracking in the asphalt layers, significantly reducing their service life. Weather influences also leave their mark on wear. Against this backdrop, the installation of asphalt inserts has proven effective in asphalt construction and pavement construction, for example, in road maintenance measures and on stressed structural surfaces (e.g., industrial areas, sports fields, etc.), during repairs and reinforcements, as well as in new construction. They significantly increase the serviceability of traffic-loaded pavements and extend their service life, particularly the intervals between structural maintenance measures.Asphalt inserts are installed in the layer system of a pavement construction, usually between the bituminous base and wear layers of the asphalt superstructure. By targeted milling of individual fields, asphalt inserts are also installed at different pavement depths, especially in the case of specifically localized damage. Asphalt inserts can primarily fulfil three different functions: stress-relieving, sealing and / or reinforcing. With the stress-relieving effect, horizontal stresses resulting from movements in the subgrade are reduced within the asphalt insert. This ensures the horizontal mobility of the subgrade and prevents or at least delays the formation and penetration of... Reflection cracks in the layer(s) above the asphalt insert. In its sealing function, the asphalt insert prevents atmospheric oxygen and water from penetrating the underlying layers. Preventing water ingress indirectly improves the load-bearing capacity of the pavement. It improves frost resistance and reduces the aging process. In their reinforcing function, the asphalt inserts are force-fitted into the pavement structure to absorb tensile forces. This reduces the stress on the layer(s) above. Asphalt inserts prevent and delay reflection cracks and maintain the effective asphalt layer thickness. Asphalt inserts are manufactured ex situ from materials such as plastic, glass, carbon, aramid or steel and have a lattice-like (grid), sheet-like (e.g. nonwovens) or lattice-and-sheet (composite materials) structure.For the sealing effect, flat or grid and flat asphalt inserts are used.

[0003] Asphalt grid refers to a regular, checkered grid, forming free squares or rectangles, whose openings are larger than its grid struts. Examples of asphalt grids include plastic grids formed by extrusion or stretching, or twisted steel grids. However, it is known that components with continuous fibers achieve the highest stiffness and strength values ​​– as is the case with asphalt inserts. For grid-shaped asphalt inserts made of glass, carbon, aramid, or polyethylene (PE), polypropylene (PP), polyester (PET), polyamide (PA), or polyvinyl alcohol (PVA) fibers, parallel filaments or continuous fibers are produced, which are then processed (woven, knitted, laid, and / or stretched, etc.) into bundles called rovings. The fiber type can also vary (so-called hybrid rovings). Depending on the specific requirements, the asphalt inserts are pretreated at the manufacturer's plant.For example, asphalt inserts with a roving structure can be unimpregnated (raw fiber grids) or completely impregnated with a matrix material (e.g. made of plastic or a bituminous mass). This matrix material (also known as an impregnation mass when the insert is impregnated) creates an adhesive bond with the substrate when the insert is installed. Non-fiber-reinforced grids can also be pre-treated with a mass or substance designed to promote adhesion in the pavement structure, which is then activated on site during installation. For example, if the underside of the asphalt grid is coated with a pressure-sensitive adhesive layer (PSA - pressure-sensitive adhesive, also self-adhesive or self-stick adhesive), this layer is activated in situ when the insert is pressed in.

[0004] In the case of sheet-like asphalt inserts such as nonwovens, layers of aligned or randomly arranged fibers or filaments are produced by mechanical, thermal, adhesive, or chemical means. Sometimes these are also pretreated in the factory – i.e., at the manufacturer’s plant – with an adhesion-promoting compound or substance (e.g., bitumen-impregnated, mechanically bonded nonwovens made of PP continuous filaments). In addition, asphalt inserts also exist in the form of composite materials, i.e., combinations of grid-like and sheet-like inserts, in which a grid is glued, needled, or otherwise attached to a carrier material (such as a nonwoven, knitted or woven fabric, or a plastic carrier) in order to form a composite. In the case of combinations of grid-like and sheet-like inserts, the carrier material alone can be pretreated with an in situ adhesion-promoting compound or substance, e.g.,a self-adhesive bitumen sheet that is laminated to a grid.

[0005] In preparation for laying the asphalt inlays and applying a new pavement layer to the base surface—that is, the surface of the base course or subgrade—of the pavement structure, this base surface is prepared in situ. Binders (so-called adhesion promoters or pressure-sensitive adhesives), typically bitumen emulsions as unmodified or polymer-modified binders, are applied to the entire surface in precisely measured quantities (so-called spraying, pre-spraying, or spraying). Depending on the type of asphalt inlay, significantly higher spraying quantities are required to enable its installation or laying. A correctly dosed binder film is a prerequisite for a good bond between the individual layers or layers of the road surface pavement.The layer bond is formed by interlocking and bonding, thus preventing movement between the individual layers under the stresses of traffic and weather. A full-surface and permanent layer bond ensures that the layer / layer package as a whole can absorb the stresses without damage and transfer them to the foundation and substructure. Too much binder has a negative impact on the layer bond because it can lead to unfavorable deformation behavior of the layers, while too little binder can cause delamination. For asphalt inserts that are completely self-adhesive or sufficiently self-adhesive for the purposes of the respective application (e.g., for pavements that are not heavily oxidized or not particularly old), a binder layer can be omitted.Such a self-adhesive asphalt inlay (typically coated with PSA) can then be installed directly onto an existing, cleaned or (finely) milled base surface.

[0006] In the next step, the asphalt inserts are laid smooth and rolled onto the sprayed or otherwise prepared base surface by a mechanical or manually operated laying device. The binder then serves as a bonding agent between the subsurface and the asphalt insert, and also between the subsurface and the subsequent pavement layer. There are various laying techniques for this. When using an adhesive emulsion as the binder, emulsion breaking must be taken into account. A (usually) majority of asphalt inserts are laid in the sticky adhesive emulsion, namely in the unbroken or only partially broken state of the adhesive emulsion, and absorb it. In contrast, inserts that have been pre-treated with an adhesion-promoting mass or substance can be applied to the already broken adhesive emulsion (i.e. the phase separation of water and binder has been completed).The adhesive effect of this mass or substance can then be tapped or activated during the installation process. Using a specific installation technique, the pre-impregnated asphalt inserts are laid with active heat input. The then softened impregnation mass of the asphalt inserts can then bond intimately with the sprayed base surface, whereas with a PSA-coated asphalt insert, this occurs through indentation of the inserts. With such pre-treated asphalt inserts, the base surface of the pavement construction requires less adhesion promoter. The drying phase is therefore also completed more quickly, and the base surface covered with asphalt inserts can therefore be passed over by construction site traffic after a comparatively shorter time. In contrast, the vast majority of asphalt inserts, which lack intrinsic adhesion potential due to a lack of pre-treatment, must be laid while the bonding emulsion is still unbroken or partially broken and thus sticky.In this case, it is necessary to wait until the adhesive emulsion has broken down before driving over newly laid insoles and a continuous, firmly adhering film has formed.

[0007] The handling of asphalt inlays is important for their firm anchoring. They must lie flat on the sub-base without blistering. Wrinkles that cannot be smoothed out must be cut open, and the edges carefully glued. Subsequent displacement of the inlays due to construction site traffic endangers the homogeneous bond of the layers and must be corrected with considerable additional effort. Summer conditions, in particular, have a critical impact on the positional stability of the inlays, because high surface temperatures or intense sunlight – even though the bonding emulsion dries faster under these conditions – can cause breaks - can reactivate the same, causing the adhesion emulsion to become sticky again. This effect also occurs with other pressure sensitive adhesives. Driving over a road surface lined with inserts then endangers the foundation on which the layer structure of the pavement is built up, because the inserts, soaked in the (again) sticky adhesion promoter, stick to the tracks or tires of the construction vehicles driving over them and can therefore be lifted and shifted. However, this phenomenon can also be observed at moderate outside temperatures, for example when trucks carrying mix travel long distances on motorways to the construction site and their tires are heated up solely due to frictional heat. If the warm vehicle tires roll over the laid asphalt inserts, they soften the adhesion promoter and thus endanger the position of the asphalt inserts.

[0008] To counteract such effects, road sections paved with asphalt interlayers are regularly watered on hot days. Tankers or water trucks are used for this purpose. However, the surface covered with asphalt interlayers quickly heats up again, making this a less efficient process and not a truly satisfactory solution. Chipping off the laid interlayers to achieve a separation effect is also not convincing, especially since the scattered chippings or fine chippings have a negative impact on the bond between the layers. Due to a lack of satisfactory solutions, the process chain is often forced to stop during the hottest hours of the day. However, a seamless and rapid sequence of work steps is essential for adhering to the schedule and keeping costs within budget.To ensure a stable layered structure and consequently a compact building structure, it is desirable to increase process reliability and eliminate risks from external factors such as weather or similar with as little additional effort as possible.

[0009] The object of the invention is therefore to provide a method that is as time- and personnel-efficient and resource-saving as possible, which can meet the challenges mentioned above and prevent installation damage by ensuring the positional stability of such asphalt inserts, so that adhesion of the inserts to the tires of vehicles, e.g. asphalt pavers, trucks, etc. and thus lifting, tearing out or shifting of the same is effectively prevented, regardless of their exposure to summer weather or situational heating, for example due to warmed-up undercarriages of vehicles driving over them on the construction site. Furthermore, the object of the invention is to provide a layer, a The invention also aims to provide a roller, as well as a use of a layer, a roller, or a retrofit kit for such a roller, which can be used for this method. A further object of the invention relates to the specification of an asphalt insert roll produced by the method, as well as a use in relation to an asphalt insert or an asphalt insert roll.

[0010] This object is achieved by a method for applying calcium hydroxide (Ca(OH)2) to an asphalt pavement having the features of claim 1. According to a further aspect of the invention, the object is achieved on the one hand by a layer and / or a roller for applying calcium hydroxide to an asphalt pavement according to claim 13, and on the other hand by the use of a layer, a roller or a retrofit kit for a layer and / or a roller for applying calcium hydroxide to an asphalt pavement according to claims 19 and 20, respectively. The object is also achieved by an asphalt pavement wound into a roll according to claim 24. Finally, the object is achieved by using calcium hydroxide for application to an asphalt plant according to claim 25. Preferred embodiments of the invention are described in the dependent claims.The application of calcium hydroxide to the asphalt layer according to the invention does not require any additional, time-consuming work step to be carried out by personnel until the asphalt layer treated with calcium hydroxide is completely installed.

[0011] FR 3 100 725 A1 discloses a kit for the proportional dosing and distribution of milk of lime (lait de chaux). The kit can be connected to any type of vehicle with an existing water tank. The water tank then serves as the main tank, with the kit including a secondary tank for storing milk of lime, a dosing unit, and a spray ramp with multiple nozzles. The milk of lime is then added via the dosing unit in proportion to the water flow from the main tank and fed to the spray ramp via its nozzles. To prevent the soil from being directly exposed to the mixture, the nozzles on the spray ramp are aligned horizontally so that the water-milk of lime mixture is applied parallel to the area to be treated. Such application methods are common in agriculture, for example, to distribute the product as widely as possible before it settles in the soil and can take effect there.

[0012] The present invention opens up the application of calcium hydroxide for asphalt inserts, both in their ex situ production and in their in situ laying. The invention is illustrated with the aid of the figures. In particular, a sequence of the inventive method is shown, from the factory production of the asphalt insert to its on-site / in-situ installation. An in-situ treatment of the asphalt insert with calcium hydroxide during its installation is also illustrated and described.

[0013] It shows: Figure 1: An asphalt grid treated with calcium hydroxide at the factory with a film laminated to it, rolled into a roll as delivered from the factory to the construction site; Figure 2: A section of the asphalt grid according to Figure 1 with its Calcium hydroxide coated top; Figure 3a: A schematic representation of a factory process for the production of calcium hydroxide-treated asphalt inserts in ready-to-deliver rolls; Figure 3b: An alternative manufacturing process compared to the one shown in Figure 3a Sequence of manufacturing steps of an asphalt insert treated with calcium hydroxide; Figure 4: A factory-made roll of asphalt liner mounted on the front of a mechanically operated laying device and ready for use; Figure 5: The laying device seen from the front and side, when unrolling the Asphalt insert from the roll and laying on the base surface of the asphalt pavement to be created; Figure 6: A laying device seen from behind and from the side, with a Discharge device for spraying the asphalt insert with calcium hydroxide immediately after it has been laid and pressed onto the base surface of the asphalt pavement to be constructed; Figure 7: A laying device seen from behind and from the side, with a Discharge device for spraying the asphalt insert with calcium hydroxide before it passes through the heating station; Figure 8: A laying device seen from the front and side, with an alternative arrangement of the discharge device for spraying the asphalt insert with calcium hydroxide before it passes through the heating station; Figure 9: A roll-off or laying vehicle or a roller retrofitted with a tank trailer including a discharge device for treating the asphalt inlay with calcium hydroxide after it has been laid and pressed onto the base surface of the asphalt pavement to be constructed; Figure 10: A road section exposed to strong sunlight with asphalt inserts laid in a stable manner thanks to their treatment with calcium hydroxide.

[0014] The present invention is suitable for all types of asphalt inserts which, by virtue of an adhesion promoter (which may only be activated during laying), are incorporated into the layer system of a paving construction for traffic areas and / or building surfaces and which form a bond with the newly laid layer. The term "layer" is understood here to mean a device for laying asphalt inserts, i.e. an asphalt insert layer. Laying involves unrolling the asphalt inserts rolled up into a roll at the factory, which is why a layer always includes an unrolling device. Optionally, the layer is equipped with one or more pressure rollers for pressing or pressing the asphalt insert then laid onto the substructure. Instead of or in addition to such a pressure device on the layer, a separate roller can be used which - downstream of the layer - presses or presses the asphalt insert.In addition to a layer, a separate roller can also be part of the installation system, meaning the installation system then consists of the layer and any separate roller. Both the layer and any separate roller can be mechanically or manually operated.

[0015] Figure 1 shows a pre-impregnated asphalt reinforcement 5 wound into a roll 1, with rovings laid in a grid-like manner, typically made of glass, carbon, aramid, PE, PP, PET, PA or PVA fibers or a mixture thereof. Such grids, like other asphalt reinforcements, are mass-produced in the factory and delivered to the construction site as rolls 1, where they are clamped onto a mechanically or manually operated installation unit and laid. In the case of the roll 1 shown in the figure, the windings are enclosed on the outside by a transparent, fusible plastic film 4, which was laminated to the grid at the factory so that it separates the adjacent windings from one another in the subsequently produced roll 1. Typically, an asphalt reinforcement measures Rolls approximately 0.2 to 1 m in diameter and 0.5 to 5 m in width. The length of the wound interlining web is between 10 and 200 m for most applications.

[0016] A special feature in Figure 1 is a whitish powder layer adhering to the surface of the rovings, or more precisely, to the already cured impregnating compound that ensures the bond. This powder is calcium hydroxide (Ca(OH)2), also known as slaked lime, hydrated lime, hydrated lime, or portlandite, with which the asphalt insert 5, or rather the grid shown here, was treated at the factory. Powder is defined as a very fine powder with a particle diameter of less than 100 pm (the size of calcium hydroxide particles typically varies between empirically determined 0.5 and 20 pm). The calcium hydroxide can be enriched with small amounts of other substances. A distribution similar to the following is recommended: • > 80% by weight calcium hydroxide, with • < 10% by weight magnesium oxide and • < 10% by weight of crystalline silicon dioxide, or preferably: • > 90% by weight of calcium hydroxide, with • < 3% by weight magnesium oxide and • < 2% by weight crystalline silicon dioxide. In particular, the calcium hydroxide for use according to the invention can be applied as a suspension. For the purposes of the present invention, the suspension is mixed in a ratio (H2O:Ca(OH)2) of 1:1 to 2:1. 40-50% calcium hydroxide dissolved in water ('milk of lime'), and advantageously 45% calcium hydroxide dissolved in water ('45% milk of lime') proves to be the preferred mixing ratio, whereby the calcium hydroxide suspension is further diluted for its application to the asphalt inlays, in a ratio (H2O:Ca(OH)2) of between 5:1 and 15:1 - preferably 10:1 - and with approximately 100 to 500 g / m 2 - preferably between 200 and 300 g / m 2 or between 250 and 350 g / m 2- is applied to the area to be treated. The present invention also allows the calcium hydroxide to be applied in the form of a dry powder, for example, using a suitable dry atomizer as a dispensing device.

[0017] Figure 2 shows a section of the calcium hydroxide-coated grid structure of asphalt insert 5. The calcium hydroxide adheres tightly to the rovings impregnated with the impregnating compound, so that, as shown in the image, one can brush a gloved hand over the rough grid surface without it coming off. This tight adhesion allows the calcium hydroxide to be used very efficiently for the present purposes. On the one hand, asphalt inserts 5 can be coated with calcium hydroxide at the factory; on the other hand, asphalt inserts 5, regardless of their composition, can be treated in situ with calcium hydroxide without requiring a separate process step. The application of calcium hydroxide ultimately acts as a sealant for the asphalt insert 5 and, depending on the case, for the entire roadway or structural surface on which it is laid.Even under critical weather conditions, the calcium hydroxide is able to ensure the positional stability of the asphalt inserts 5 when they are driven over by construction machinery and vehicles, as will be explained further below.

[0018] Figure 3a shows, from right to left, a schematic of the inventive factory manufacturing process of a pre-impregnated asphalt insert 5 to the ready-to-deliver product as a roll 1. On the far right is the roll 20, from which the insert 5 is unrolled with its raw structure and fed as a web to an impregnation station in the direction indicated by an arrow. There, it is impregnated by immersion in a bath 14 with an impregnating compound, for example, a bituminous impregnating compound or an impregnating compound made of synthetic polymers or a plastic. Preferably, the insert 5 is briefly lifted out of the bath 14 after a first immersion and guided over a deflection roller 19 before being fully immersed in the impregnating compound a second time. Instead of the impregnation of the insert 5 in a bath 14 shown here, it can also be treated in some other way with an adhesion promoter which is able to produce a surface adhesive bond in situ.The insert 5 can also be coated or superficially coated with an adhesive, such as a PSA. The PSA is typically rolled onto an asphalt grid.

[0019] The insert 5 leaves the bonding treatment station, in the example shown here soaked in the viscous impregnation mass of the bath 14. Next, it is fed to a spraying system 16, where the insert 5 is sprayed from above via one or more nozzles 21 with a calcium hydroxide suspension 17, represented by the spray mist cloud. The suspension 17 is finely distributed over the surface of the applied to the insert 5 treated with adhesion promoter and typically dries within a few seconds. What remains is a strongly adhering surface coating of the insert 5, which withstands considerable mechanical stress and abrasion. In order to prevent the spray mist 17 from settling on unwanted surfaces, an enclosure for the spray system 16 is recommended. In a special design, the spray nozzles 21 of the spray system 16 are pivotable. This allows the housing of the spray system 16 to be rinsed and cleaned of any calcium hydroxide residues after a production process by directing the spray jet with suitable cleaning agents. The spray system 16 can also be equipped with an extension hose with a hand shower for this purpose. Advantageously, a drainage channel (not shown) is also located beneath the spray system 16 for draining away the remaining calcium hydroxide suspension 17 that was not absorbed by the insert 5.Meanwhile, the underside of the insert 5, as the side to be rolled out in situ onto the substrate, can remain free of calcium hydroxide. In a further, as required, process step, a cover material 4 is fed to the web from a roll 15, whereby the underside of the insert 5 is bonded to the (still) sticky adhesion promoter. In the case of a viscous impregnation compound, its subsequent solidification leads to a stabilization of the insert structure and to a firm adhesion of the cover material 4 to its underside, which then serves as a transport and installation aid. A film, for example, is suitable as a cover material 4, but also a fleece, woven fabric, knitted fabric, etc. The cover material 4 can also be meltable and flame-treated during the installation process. In the case of an insert grid treated with PSA, a cover material 4 is formed by the protective film of the adhesive layer.

[0020] An alternative sequence of process steps is shown in Figure 3b. The raw insert 5 is soaked in the bonding agent bath 14 and then optionally bonded to the covering material 4 before being fed to the spraying system 16 in its still soft, viscous impregnation mass. Likewise, in an alternative treatment with bonding agent, the insert 5, after leaving the corresponding treatment station, is laminated with a covering material 4 if required (in a treatment station with a pressure roller as the adhesive dispenser roll, a film is usually applied directly) and fed to the spraying system 16. There, it is sprayed with the calcium hydroxide suspension 17 so that this coats the insert 5 - and in the case of an insert grid, together with any covering material 4. It is understood that in the processes, as presented in Figures 3a and 3b, for example, the calcium hydroxide is applied in the form of a Suspension 17 can also be applied as a dry powder using a suitable dispensing device (e.g., a powder atomizer). Furthermore, it is clear that additives may also be added to the calcium hydroxide, as explained, for example, in section

[0016] .

[0021] Figure 4 shows a roll of asphalt insert 1 mounted on a laying device 2, which here acts as the front end of a roll-off or laying vehicle and is pushed by the vehicle. The asphalt insert 5 wound onto it is pre-impregnated and may, depending on the application, have been factory-treated with calcium hydroxide. The laying device 2 shown here has a heating or flame bar 9, on which pre-impregnated asphalt inserts 5 are heated before being laid on the sprayed base surface 3 and are laid in the correspondingly soft state of their impregnation compound. It is clear that such a laying device 2 is also suitable for the conventional, i.e., non-heat-dependent, laying process of all types of asphalt inserts 5, for which the heating device then remains inactive.

[0022] Figure 5 shows the laying device 2 moving from right to left as it unwinds the asphalt insert 5, which is pulled backwards from roll 1 and fed to the flame bar 9, where the impregnation compound of the pretreated insert 5 is heated and thus becomes sticky. If the insert 5 is also coated with a meltable covering material 4, this evaporates due to the heat. The asphalt insert 5 is then laid onto the sprayed base surface 3 of the asphalt pavement to be created in such a way that at least one surface of the insert 5 treated with calcium hydroxide - either already created in the factory or still to be created - rests on top. Immediately after its placement, a number of parallel steel rollers or cylinders 7 roll over the insert 5 with strong pressure. After the steel rollers 7, the pneumatic tires 8 or tracks of the unrolling or laying vehicle immediately roll over the insert 5.A factory-applied calcium hydroxide layer withstands heating of the insert 5 as it passes through the heating bar 9 - to approx. 100° to 250°. Q C, and mostly within the range 120 Q C-210 Q C - stand, as well as the subsequent abrasion by the rollers 7 and the undercarriage 8 of the laying vehicle. Because the asphalt insert 5 is laid here in its soft impregnating compound, the process can be carried out in the broken state of an adhesive emulsion of the sprayed base surface 4. The impregnating compound of the insert 5, heated by the heating bar 9, bonds with the adhesion promoter of the base surface 4, which is also heated by its pressing.

[0023] With asphalt inserts 5 pre-treated with an adhesion promoter impregnation or coating, the base surface 4 requires significantly less adhesion promoter. The laid asphalt inserts 5 can sometimes be driven over by construction vehicles and the like after just a few minutes. The calcium hydroxide layer remains as a dry, finely distributed powder on the upper side of an insert 5 and is able to ensure an extremely high separating effect between the insert 5 and the undercarriage of vehicles driving over it, even under critical weather conditions. Calcium hydroxide has the decisive advantage over other separating substances in that it is permanently compatible with bitumen. Other substances, even if they can in principle bring about a separating effect, unlike calcium hydroxide, cannot be used in the superstructure orIt would not integrate into the bitumen in the layer to be installed above, which would result in undesirable effects on the layer bond. This is because there is a conflict of objectives between the separation effect and the layer bond to be created. With calcium hydroxide, however, this problem does not arise.

[0024] The adhesive mass of the insert 5, regardless of whether it was pre-applied at the factory (impregnation, painting, adhesive coating) and / or absorbed in situ by the sprayed base surface 3, is protected from solar radiation and consequently from reactivation by the calcium hydroxide layer. The calcium hydroxide then effectively prevents the inserts 5 from sticking to the tires and tracks of vehicles rolling over them, so that construction site traffic and thus the construction process can continue unhindered. The process explained using a mechanical installer can be carried out analogously with manually operated rolling installation devices 2, which are designed to be considerably smaller and more manageable. For smaller installation areas, especially those with complex geometric layouts, such a manual installer can prove very practical.Depending on the installation configuration (with or without pressure rollers 7) and the required contact pressure, the rolling of the asphalt inlay 5, which forms part of the installation process, can also be performed by a separate rolling machine (possibly additionally). The roller then passes over the inlay 5 after it has been laid (and possibly previously pressed) by the installer.

[0025] By integrating the calcium hydroxide treatment step into the manufacturing process of the inserts 5, the installation process on site can be carried out unchanged, thus offering the greatest possible efficiency in the application. As can now be seen, an asphalt insert 5 can also be treated in situ with Treated with calcium hydroxide. This occurs during the installation process, without any process-related delays. Unlike traditional sealants, where the sealing layer is only applied once the underlying layers have settled or are no longer "working," the calcium hydroxide sealing layer is proactively applied during the installation process. This prepares it for any construction traffic and weather conditions that may arise.

[0026] The in-situ application process is illustrated in Figure 6. The figure shows a possible embodiment of the laying device 2, on which a tank 10 is arranged with an application device in the form of a spray boom 11, connected via hydraulic or pneumatic pump lines and positioned at the end here, for spraying the freshly unrolled, laid, and here directly rolled-in asphalt layer 5 with calcium hydroxide. A plurality of spray nozzles 21 are arranged along the spray boom 11 such that the calcium hydroxide suspension 17 is applied evenly across the entire width of the asphalt layer 5. As shown, the application takes place in a direction facing the surface of the laid asphalt layer 5, namely perpendicular or substantially perpendicular to the surface to be treated, according to the thus directed spray jet of the nozzles 21 on the spray boom 11.It goes without saying that even inserts 5 treated with calcium hydroxide at the factory can be additionally coated with calcium hydroxide on-site in this way. The in-situ application of calcium hydroxide after the insert 5 has been laid and / or rolled has the following additional advantage in the case of grid inserts: Not only the insert 5, but also the base surface 3 of the asphalt pavement to be constructed, exposed through the grid openings, is sprayed with calcium hydroxide. When the asphalt grid is fully coated underneath with PSA adhesives (PSA adhesive layer), the bonding points between the grid strands can be sprayed with calcium hydroxide from above in this way. This ensures that the roadway or structural surface to be covered with asphalt inserts 5 benefits from the sealing across its entire surface.The illustrated device for discharging calcium hydroxide, with spray boom 11, tank container 10, and pressure pumps, is advantageously made available as a retrofit kit for the rapid retrofitting of any laying device and / or separately used rollers, whether manually or mechanically operated. The spray boom 11 is designed so that it can be easily attached to the laying device 2, for example, by hooking it onto a bar and securing it with a spring latch. The same applies to a roller / rolling machine.

[0027] Depending on the installer, the discharge device or spray bar 11 can be arranged differently. For pre-impregnated inserts 5, which are heated during laying, the discharge device is preferably arranged downstream of the heating bar 9 so that the calcium hydroxide is maximally absorbed by the insert 5, which is permeated by the soft impregnation compound (softened by heating on the heating bar 9). Depending on the space available, the discharge device can also be positioned so that calcium hydroxide is applied first and the insert 5 is then heated on the heating bar 9. This is illustrated in the design of the laying unit 2 according to Figure 7. In the arrangement of the spray bar 11 with the nozzles 21 shown, the spray jet is directed horizontally and thus faces the surface of the asphalt insert 5 to be treated with calcium hydroxide.The multiple nozzles 21 on the spray boom 11 are clearly aligned such that their spray jet impinges on the asphalt pavement surface to be treated in a vertical or substantially vertical direction. A baffle 13 in the form of a protective plate, plastic attachment, mat, and / or basin, etc., can be positioned beyond the application side to collect calcium hydroxide not absorbed by the pavement 5. This reduces cleaning effort. Figure 8 shows a further variant for the arrangement of the discharge device or spray boom 11 on a laying device 2, with an optional protective plate shaped as a collecting basin 22. This is intended to be located beyond the asphalt pavement 5 opposite the calcium hydroxide discharge – which, as shown, occurs in a direction facing the surface of the asphalt pavement 5 to be treated, essentially perpendicular to it.When applying a calcium hydroxide suspension 17, this can advantageously be fed via a drainage channel into a collecting container which is carried by the installer.

[0028] If, for example, there is no space on an existing installation unit 2 for attaching a calcium hydroxide tank container 10 and a discharge device or spray boom 11, a trailer 18 can provide a solution. Figure 9 shows a retrofit kit with a tank trailer 18 and a spray boom 11 connected to it. Provided a trailer coupling is available, any existing layer or roller can be retrofitted with it and thus carried along. With a manually operated layer, a handcart with tank 10 and spray boom 11 or spray lance can be carried, preferably by a second specialist. For small installation areas, a small tank can be used, which the specialist can even carry on their back. For the inventive concept, it is irrelevant whether the trailer 18 or handcart is physically connected to the layer or roller. The trailer 18 can also be battery-operated and carried with the layer or roller by remote control, without any mechanical connection.

[0029] Figure 10 shows a base surface 3 of an asphalt pavement to be constructed for a traffic area or building surface, with asphalt inserts 5 laid on it. Once the bonding agent has cured, the asphalt inserts 5 are anchored to the base surface 3. Accordingly, the construction section is ready for the installation of the new pavement layer of the layered system of this pavement construction. In construction practice, such sections of road must be passable by local traffic before the new pavement layer is installed. In the case of continuous, intense sunlight, as is often the case on hot summer days, without the inventive application of calcium hydroxide, there is a risk that the bonding agent will reactivate and become sticky. Accordingly, every time a construction vehicle or similar vehicle drives over the section, there is a risk that the inserts 5 will adhere to its tires or tracks and thus be torn out of their anchorage.Thanks to the present invention, however, a very effective protective coating is provided, effectively preventing reactivation of the bonding properties of the adhesion promoter. The calcium hydroxide-treated inserts 5 therefore offer excellent release properties against vehicles rolling over them, even at sustained outside temperatures of 30°C or higher. The calcium hydroxide coating ensures the stability of the laid asphalt inserts 5 even at moderate temperatures, such as when warm tires 8 of vehicles that have had to travel long distances at high speed to the construction site roll over the inserts 5. It has also been shown that even prolonged precipitation does not precipitate the calcium hydroxide coating of the inserts 5; rather, the bond between the calcium hydroxide and the adhesion promoter is so strong that the sealing and protective function is maintained even under such conditions.The method applied according to the invention—both the ex situ or at the manufacturer's plant and the in situ proactive treatment of the inserts 5 with calcium hydroxide—eliminates the need for situational action. If the inserts 5 have been laid with a calcium hydroxide coating, no additional measures are required to ensure the positional stability of the inserts 5, even in the event of sudden changes in weather forecasts or unforeseeable events (tire temperature of vehicles that have to drive over the road sections). Above all, the application of calcium hydroxide according to the invention requires... Regardless of whether it is carried out in the factory or on-site, there are no additional process steps and therefore no additional time or personnel expenditure.

[0030] The object is achieved in particular by the inventive subject matter of the following sections or any combination of these sections:

[0031] A method for applying calcium hydroxide (Ca(OH)2) to an asphalt insert 5 intended to be incorporated into a layer system of a pavement construction for traffic areas and / or building surfaces, wherein the asphalt insert 5 can be manufactured in a factory and wound into a roll 1 and transported to a construction site and clamped there to a layering machine, and the roll 1 can then be unrolled and (the unrolled asphalt insert 5) can be laid onto a base surface 3 of the pavement construction and pressed by the layering machine and / or a (possible) separate roller, and finally, a pavement layer of the layer system can be applied over the base surface 3 thus processed,wherein the calcium hydroxide is applied to the asphalt insert 5 using a discharge device at the manufacturer's plant and / or on the construction site - wherein, in the case of application on the construction site, the discharge device is arranged on the layer and / or on the (possible) separate roller and / or is carried by it or therewith on a trailer 18 - and the calcium hydroxide is applied to at least one or that surface of the asphalt insert 5 which is passable by construction site traffic during installation of the asphalt insert 5 into the layer system of the pavement construction in situ prior to the application of the overlying pavement layer.

[0032] A method for applying calcium hydroxide (Ca(OH)2) to an asphalt insert 5, which is installed in a layer system of a pavement construction for traffic areas and / or building surfaces, wherein the asphalt insert 5 is manufactured in a manufacturing plant and wound into a roll 1 and transported to a construction site and clamped there to a layering device, and then the roll 1 is unrolled and (the unrolled asphalt insert 5) is placed on a base surface 3 of the pavement construction and pressed by the layering device and / or a (possible) separate roller, and finally, on the base surface 3 thus processed, a pavement layer of the layer system is applied over it,wherein the calcium hydroxide is applied to the asphalt layer 5 using a discharge device in the manufacturer's factory and / or on the construction site - wherein in the case of application on the construction site, the discharge device is arranged on the layer and / or on the (possible) separate roller, and / or is carried by it or therewith on a trailer 18 - and the calcium hydroxide is applied to at least one or that surface of the asphalt insert 5 which is passable by construction site traffic in situ before the overlying pavement layer is laid.

[0033] A method for applying calcium hydroxide (Ca(OH)2) to an asphalt insert 5, which can be incorporated into a layer system of a pavement construction for traffic areas and / or building surfaces, wherein the asphalt insert 5 can be manufactured in a manufacturing plant and wound into a roll 1 and transported to a construction site and clamped there to a layering machine, and then the roll 1 can be unrolled and (the unrolled asphalt insert 5) can be laid onto a base surface 3 of the pavement construction and pressed by the layering machine and / or a (possible) separate roller, and finally, a pavement layer of the layer system can be applied over the base surface 3 thus processed,wherein the calcium hydroxide is applied to the asphalt insert 5 using a discharge device at the manufacturer's plant and / or on the construction site - wherein, in the case of application on the construction site, the discharge device is arranged on the layer and / or on the (possible) separate roller and / or is carried by it or therewith on a trailer 18 - and the calcium hydroxide is applied to at least one or that surface of the asphalt insert 5 which is passable by construction site traffic during installation of the asphalt insert 5 into the layer system of the pavement construction in situ prior to the application of the overlying pavement layer.

[0034] Method for applying calcium hydroxide (Ca(OH)2) to an asphalt insert 5 to be incorporated into a layer system of a pavement construction for traffic areas and / or building surfaces, wherein the calcium hydroxide is applied to the asphalt insert 5 using a discharge device in a manufacturing plant and / or on a construction site - wherein in the case of application on the construction site, the discharge device is arranged on a layer and / or on a (possible) separate roller and / or is carried by it or therewith on a trailer 18 - and the calcium hydroxide is applied to at least one or that surface of the asphalt insert 5 which can be driven over by construction site traffic when the asphalt insert 5 is incorporated into the layer system of the pavement construction in situ before the pavement layer to be laid over it is applied.

[0035] Method for applying calcium hydroxide (Ca(OH)2) to an asphalt insert 5 according to one of the sections

[0031] to

[0034] , wherein the asphalt insert 5 is or is transported to the construction site and is or is laid there with a laying system, wherein the laying system consists of a layer and a possible separate roller, wherein the roll 1 is or is clamped to the layer, and then the roll 1 is or is unrolled and (the unrolled asphalt insert 5) is or is laid on the base surface of the pavement construction and can be or is pressed by the layer and / or the possible separate roller, and finally the overlying pavement layer of the layer system can be or is or is laid on the base surface 3 thus processed.is introduced, wherein the calcium hydroxide is applied to the asphalt layer 5 with the discharge device in the manufacturer's factory and / or on the construction site - wherein in the case of application on the construction site, the discharge device forms part of the laying system in that it is arranged on the layer and / or on the possible separate roller and / or is carried by the trailer 18 or therewith.

[0036] Method for applying calcium hydroxide (Ca(OH)2) to an asphalt layer 5 according to one of the sections

[0031] to

[0035] , wherein the depositable or deposited asphalt layer 5 can be or is pressed by at least one pressure roller 7 on the layer and / or by a pressure roller 7 of the (possible) separate roller.

[0037] Method for applying calcium hydroxide (Ca(OH)2) to an asphalt layer 5 according to one of the sections

[0031] to

[0036] , wherein the calcium hydroxide is applied in the form of a suspension 17 or as a dry powder.

[0038] Method for applying calcium hydroxide (Ca(OH)2) to an asphalt layer 5 according to one of the sections

[0031] to

[0037] , wherein the calcium hydroxide is in the form of a suspension 17 in a dilution ratio H2O : Ca(OH)2 of between 5:1 and 15:1 with 100-500 g of suspension per m 2 is applied to the asphalt insert 5.

[0039] Process for applying calcium hydroxide (Ca(OH)2) to an asphalt layer 5 according to section

[0038] , wherein the suspension 17 contains (particles with a solids weight % distribution of) >80 wt% calcium hydroxide, <10 wt% magnesium oxide and <10 wt% silicon dioxide.

[0040] Method for applying calcium hydroxide (Ca(OH)2) to an asphalt insert 5 according to one of the sections

[0031] to

[0039] , wherein the asphalt insert 5 is in the manufacturer's plant is pretreated by feeding it as a web to a bath 14 with impregnation mass (which promotes adhesion or is intended to act as an adhesion promoter in situ) and the asphalt insert 5 is impregnated or the asphalt insert 5 is fed as a web to a pressure roller, via which a mass or substance intended to act as an adhesion promoter in situ is applied to the asphalt insert 5, and the web is then fed to the discharge device in the form of a spraying system 16 for the application of the calcium hydroxide to the asphalt insert 5 pretreated with adhesion promoter by means of one or more spray nozzles 21, and the asphalt insert 5 is then wound up with several windings for transport to the roll 1.

[0041] Method for applying calcium hydroxide (Ca(OH)2) to an asphalt insert 5 according to one of the sections

[0031] to

[0040] , wherein the asphalt insert 5 with its (impregnation) mass or substance intended to act as an adhesion promoter in situ is laid on the construction site onto the milled and / or binder-sprayed base surface 3, wherein this (impregnation) mass or substance is activated by the installer or the separate roller to produce an adhesive bond with the base surface 3.

[0042] Method for applying calcium hydroxide (Ca(OH)2) to an asphalt pavement 5 according to one of the sections

[0040] or

[0041] , wherein a surface of the sheet left free of calcium hydroxide after pretreatment with adhesion promoter and spraying of the asphalt pavement 5 with calcium hydroxide is coated with a covering material 4 either before or after application of the calcium hydroxide, so that this covering material 4 adheres to the asphalt pavement 5 as a result of viscosity and / or adhesion of the adhesion promoter, and subsequently the sheet is wound up into a roll 1 with the adhering covering material 4 for transport.

[0043] Method for applying calcium hydroxide (Ca(OH)2) to an asphalt layer 5 according to one of the sections

[0031] to

[0042] , wherein the layer and / or the separate roller and / or the trailer 18 carried by it or therewith is equipped with a tank 10 and a discharge device in the form of a spray boom 11 connected to the tank 10 by means of a pressure pump, with which the calcium hydroxide is applied to the asphalt layer 5.

[0044] Method for applying calcium hydroxide (Ca(OH)2) to an asphalt layer 5 according to one of the preceding sections

[0031] to

[0043] , wherein the discharge device is arranged on the layer in such a position that the Calcium hydroxide is sprayed onto the asphalt layer 5 before it is laid onto the base surface 3, and calcium hydroxide not absorbed by the asphalt layer 5 is collected by at least one baffle 13 on the layer.

[0045] Method for applying calcium hydroxide (Ca(OH)2) to an asphalt layer 5 according to one of the preceding sections

[0031] to

[0044] , wherein the (in the case of dependence on

[0044] additional) discharge device is arranged at such a position of the layer that the calcium hydroxide is sprayed onto the asphalt layer 5 after the asphalt layer 5 has been laid on the base surface 3.

[0046] A layer and / or roller for applying calcium hydroxide (Ca(OH)2) to an asphalt layer 5 (according to the method) according to any one of sections

[0031] to

[0045] , wherein the layer and / or roller includes a tank 10, a pressure pump and a discharge device in the form of a spray boom 11 connected to the pressure pump on the tank 10 for applying calcium hydroxide to the asphalt layer 5.

[0047] A layer and / or roller according to section

[0046] , wherein the layer and / or the roller includes a trailer 18 which can be towed by it or by it, or a trailer 18 which can be carried along with the layer or the roller and which can be towed or carried by a person who operates the layer or the roller, on which the tank 10, the pressure pump and the discharge device connected to the pressure pump on the tank 10 for discharging calcium hydroxide onto the asphalt layer 5 are mounted.

[0048] A layer and / or roller according to section

[0047] , wherein the portable trailer 18 with its tank 10 is designed in the form of a device with a canister that can be carried on the person's back, and the discharge device is a spray lance.

[0049] A layer and / or roller according to section

[0046] , wherein the layer and / or the roller includes a battery-operated, remote-controllable trailer 18 which can thus be carried without mechanical connection to the layer or the roller, on which the tank 10, the pressure pump and the discharge device connected to the pressure pump on the tank 10 for discharging calcium hydroxide onto the asphalt layer 5 are mounted.

[0050] Laying plant for the application of calcium hydroxide (Ca(OH)2) to an asphalt layer 5 (according to the method) according to one of the sections

[0031] to

[0045] , consisting of a layer and a possible separate roller, wherein the layer and / or the roller comprises a tank 10, a pressure pump and a pressure pump connected to the pressure pump on Tank 10 connected discharge device in the form of a spray boom 1 1 for applying calcium hydroxide to the asphalt layer 5.

[0051] Laying system for applying calcium hydroxide (Ca(OH)2) to an asphalt insert 5 according to section

[0050] , wherein the depositable or deposited asphalt insert 5 can be or is pressed by at least one pressure roller 7 on the layer and / or by a pressure roller 7 of the possible separate roller.

[0052] Laying system for applying calcium hydroxide (Ca(OH)2) to an asphalt layer 5, consisting of the layer and the possible roller according to one of the sections

[0046] to

[0049] .

[0053] Retrofit kit for a layer and / or a roller or a laying system for applying calcium hydroxide (Ca(OH)2) to an asphalt layer 5 according to one (method) of sections

[0031] to

[0045] or according to one of sections

[0046] to

[0052] , wherein the retrofit kit includes a tank 10, a pressure pump and a discharge device in the form of a spray boom 11 connected to the pressure pump on the tank 10 for applying calcium hydroxide to the asphalt layer 5, and the retrofit kit can be attached directly to the layer and / or the roller or can be towed by the layer or the roller by means of a trailer 18 or can be carried along with the layer or the roller by means of a battery-operated trailer 18 via remote control or in the form of a trailer 18 which can be towed or is portable.

[0054] A layer, roller, laying system or retrofit kit according to any one of the respective sections

[0046] to

[0053] , wherein the tank 10 contains calcium hydroxide.

[0055] Use of a layer or a roller or a laying system for applying calcium hydroxide (Ca(OH)2) to an asphalt layer (5) according to one (method) of sections

[0031] to

[0045] or according to one of sections

[0046] to

[0054] , wherein the layer and / or the roller includes a tank (10), a pressure pump and a discharge device in the form of a spray boom (11) connected to the pressure pump on the tank (10) for applying calcium hydroxide to the asphalt layer (5).

[0056] Use of a retrofit kit for a layer and / or a roller or a laying system for applying calcium hydroxide (Ca(OH)2) to an asphalt layer 5 according to one (method) of sections

[0031] to

[0045] or according to one of the sections

[0046] to

[0055] , wherein the retrofit kit includes a tank 10, a pressure pump and a discharge device in the form of a spray boom 11 connected to the pressure pump on the tank 10 for applying calcium hydroxide to the asphalt layer (5), and the retrofit kit can be attached or mounted directly on the layer and / or the roller or can be carried by means of a trailer 18 in each case therefrom or therewith.

[0057] Use of a retrofit kit for a layer and / or a roller or a laying system, wherein the retrofit kit can be towed by the layer or the roller by means of a trailer 18 or can be carried along with the layer or the roller by means of a battery-operated trailer 18 via remote control or the carryable trailer 18 can be towed or carried by a person operating the layer or the roller.

[0058] (Referring to each preceding paragraph): [...], wherein the calcium hydroxide is discharged or can be discharged in a direction facing the asphalt pavement surface (to which calcium hydroxide is applied).

[0059] (Referring to any preceding paragraph): [...], wherein the calcium hydroxide is dischargeable or discharged in a direction perpendicular or substantially perpendicular to the asphalt pavement surface (to which calcium hydroxide is applied).

[0060] (Referring to each preceding section): [...], wherein the calcium hydroxide is or can be discharged via at least one nozzle on the discharge device or on the spray boom 11 in the form of a spray jet directed perpendicularly or substantially perpendicularly onto the asphalt surface (on which calcium hydroxide is applied).

[0061] (Referring to each preceding section): [...], wherein the discharge device is designed such that a spray jet emerging from the nozzle of the spray bar 1 1 or each spray jet emerging from the plurality of nozzles of the spray bar 1 1 forms the shape of a cone, the opening angle of which is adjustable and / or the spray bar 1 1 is pivotally mounted, for generating different spray patterns.

[0062] Asphalt insert 5 wound into a roll 1, produced (by one of the methods) according to sections

[0031] to

[0045] .

[0063] Asphalt insert 5 wound into a roll 1, manufactured in a manufacturing plant according to one of the processes according to sections

[0031] to

[0045] .

[0064] Asphalt insert 5 wound into a roll 1 with calcium hydroxide (Ca(OH)2) applied thereon (or on the asphalt insert 5).

[0065] Asphalt insert 5 wound into a roll 1 according to one of the sections

[0062] to

[0063] with calcium hydroxide (Ca(OH)2) applied thereon (or on the asphalt insert 5).

[0066] Asphalt insert 5, manufactured (by one of the processes) according to sections

[0031] to

[0045] .

[0067] Asphalt insert 5, manufactured in a manufacturing plant according to one of the processes according to sections

[0031] to

[0045] .

[0068] Asphalt insert 5 with calcium hydroxide (Ca(OH)2) applied to it (or on the asphalt insert 5).

[0069] Asphalt insert 5 according to one of the sections

[0066] to

[0067] with calcium hydroxide (Ca(OH)2) applied thereon (or on the asphalt insert 5).

[0070] Use of calcium hydroxide (Ca(OH)2) for application to an asphalt insert 5 and / or (for producing an) asphalt insert 5 wound into a roll 1 and / or for application to an asphalt insert 5 which is wound into a roll 1.

[0071] Use of calcium hydroxide (Ca(OH)2) for application to an asphalt insert 5 according to one (method) of sections

[0031] to

[0045] or according to one of sections

[0066] to

[0069] .

[0072] Use of calcium hydroxide (Ca(OH)2) for producing an asphalt insert 5 wound into a roll 1 according to one of the sections

[0062] to

[0065] .

[0073] Use according to one of the sections

[0070] to

[0072] , wherein the application of calcium hydroxide (Ca(OH)2) is carried out with a discharge device in the manufacturer's factory and / or on the construction site, wherein in the case of application on the construction site the discharge device is arranged on the layer and / or on the (possible) separate roller and / or is carried by it or therewith on a trailer 18 - and the calcium hydroxide is applied to at least one or that surface of the asphalt layer 5 which is in situ passable by construction site traffic before the overlying pavement layer is laid.

[0074] Finally, it should be mentioned that a mobile manufacturing plant can also be set up on-site, for example, on a truck, where such asphalt inserts can be manufactured and, if necessary, treated with calcium hydroxide. This allows the ex situ production of the asphalt inserts to take place in close proximity to their in situ installation. Index 1 wound roll 2 Laying device 3 Base surface 4 Covering material 5 Asphalt insert 6 Deflection pulley on the laying device 2 7 pressure roller(s) or steel roller(s) for pressing the asphalt insert 8 vehicle wheels, tires 9 heating bars 10 tanks 11 spray bars 12 Vehicle for mechanical operation of the laying device 2 13 aperture 14 bathrooms 15 Roll for unrolling cover material 4 or dispenser roll 16 spray system 17 Suspension with calcium hydroxide 18 followers 19 Pulley above the bath 14 20 Roll for unrolling raw asphalt inserts 5 21 spray nozzle or spray nozzles

Claims

Patent claims 1. Method for applying calcium hydroxide (Ca(OH)2) to a Asphalt insert (5) which is intended to be incorporated into a layer system of a paving construction for traffic areas and / or building surfaces, wherein the asphalt insert (5) can be produced in a manufacturing plant and wound up into a roll (1) and transported to a construction site and clamped there to a layer, and the roll (1) can then be unrolled and placed on a base surface (3) of the paving construction and pressed by the layer and / or a possible separate roller, and finally, on the base surface (3) thus processed, a paving layer of the layer system can be introduced overlying it,wherein the calcium hydroxide is applied to the asphalt insert (5) using a discharge device in the manufacturer's factory and / or on the construction site - wherein in the case of application on the construction site, the discharge device is arranged on the layer and / or on the possible separate roller and / or is carried by it or therewith on a trailer (18) - and the calcium hydroxide is applied to at least one or that surface of the asphalt insert (5) which, when the asphalt insert (5) is installed in the layer system of the pavement construction in situ before the pavement layer to be laid over it is laid, Construction site traffic can be crossed.

2. A method for applying calcium hydroxide (Ca(OH)2) to an asphalt insert (5) according to claim 1, which is incorporated into the layer system of a pavement construction for traffic areas and / or building surfaces, wherein the asphalt insert (5) is manufactured in the manufacturer's factory and wound up into a roll (1) and transported to the construction site and clamped there on the installer, and then the roll (1) is unrolled and placed on the base surface (3) of the pavement construction and pressed by the installer and / or any separate roller, and finally, on the base surface (3) thus processed, the overlying pavement layer of the layer system is applied, wherein the calcium hydroxide is applied to the asphalt insert (5) using a discharge device in the manufacturer's factory and / or on the construction site. - wherein in the case of application on the construction site, the discharge device is arranged on the layer and / or on the possible separate roller and / or is carried by the trailer (18) or therewith - and the calcium hydroxide is applied to at least that surface of the asphalt insert (5) which can be driven over by construction site traffic in situ before the laying of the overlying pavement layer.

3. A method for applying calcium hydroxide (Ca(OH)2) to an asphalt layer (5) according to claim 1 or 2, wherein the calcium hydroxide is in the form of a suspension (17) in a dilution ratio H2O : Ca(OH)2 of between 5:1 and 15:1 with 100-500 g of suspension per m 2 is applied to the asphalt insert (5).

4. A method for applying calcium hydroxide (Ca(OH)2) to an asphalt pavement (5) according to claim 3, wherein the suspension (17) contains particles having a solids weight % distribution of >80 weight % calcium hydroxide, <10 weight % magnesium oxide and <10 weight % silicon dioxide.

5. A method for applying calcium hydroxide (Ca(OH)2) to an asphalt pavement (5) according to one of the preceding claims, wherein the asphalt pavement (5) is pretreated in the manufacturing plant by feeding it as a web to a bath (14) with impregnation compound and the asphalt pavement (5) is impregnated or the asphalt pavement (5) is fed as a web to a pressure roller, via which a mass or substance intended to act as an adhesion promoter in situ is applied to the asphalt pavement (5), and the web is then fed to the discharge device in the form of a spray system (16) for the application of the calcium hydroxide to the asphalt pavement (5) pretreated with adhesion promoter by means of one or more spray nozzles (21), and the asphalt pavement (5) is then wound up with several windings for transport to the roll (1).

6. Method for applying calcium hydroxide (Ca(OH)2) to an asphalt layer (5) according to one of the preceding claims, wherein the asphalt layer (5) with its mass or substance intended to act as an adhesion promoter in situ is laid on the construction site onto the milled and / or binder-sprayed base surface (3), wherein this mass or substance is used for the production of a Adhesive bond with the base surface (3) is activated by heat and / or pressure input from the installer or from the separate roller.

7. A method for applying calcium hydroxide (Ca(OH)2) to an asphalt pavement (5) according to one of claims 5 or 6, wherein a surface of the sheet left free of calcium hydroxide after pretreatment with adhesion promoter and spraying of the asphalt pavement (5) with calcium hydroxide is coated with a covering material (4) either before or after application of the calcium hydroxide, so that this covering material (4) adheres to the asphalt pavement (5) as a result of viscosity and / or adhesion of the adhesion promoter, and then the sheet is wound up into a roll (1) with the adhering covering material (4) for transport.

8. A method for applying calcium hydroxide (Ca(OH)2) to an asphalt layer (5) according to any one of the preceding claims, wherein the layer and / or the separate roller and / or the trailer (18) carried by it or therewith is equipped with a tank (10) and a discharge device in the form of a spray boom (11) connected to the tank (10) by means of a pressure pump, with which the calcium hydroxide is applied to the asphalt layer (5).

9. A method for applying calcium hydroxide (Ca(OH)2) to an asphalt layer (5) according to any one of the preceding claims, wherein the discharge device is arranged on the layer in such a position that the calcium hydroxide is sprayed onto the asphalt layer (5) before it is laid down on the base surface (3), and wherein calcium hydroxide not absorbed by the asphalt layer (5) is collected by at least one baffle (18) on the layer.

10. A method for applying calcium hydroxide (Ca(OH)2) to an asphalt pavement (5) according to any one of claims 1-8, wherein the discharge device is arranged at such a position of the layer that the calcium hydroxide is sprayed onto the asphalt pavement (5) after the asphalt pavement (5) has been laid on the base surface (3). 1 1. Method according to one of the preceding claims, wherein the calcium hydroxide is discharged in a direction facing the surface of the asphalt insert (5).

12. The method according to claim 1 1, wherein the calcium hydroxide is discharged in a direction perpendicular or substantially perpendicular to the surface of the asphalt insert (5).

13. A layer and / or roller for applying calcium hydroxide (Ca(OH)2) to an asphalt layer (5) according to any one of the preceding claims, wherein the layer and / or roller includes a tank (10), a pressure pump and a discharge device in the form of a spray bar (11) connected to the pressure pump on the tank (10) for applying calcium hydroxide to the asphalt layer (5).

14. Layer and / or roller according to claim 13, wherein the layer and / or the roller includes a trailer (18) which can be towed by it or by it, or a trailer (18) which can be carried along with the layer or with the roller and which can be towed or carried by a person who operates the layer or the roller, on which the tank (10), the pressure pump and the discharge device connected to the pressure pump on the tank (10) for discharging calcium hydroxide onto the asphalt layer (5) are mounted.

15. A layer and / or roller according to claim 14, wherein the portable trailer (18) with its tank (10) is designed in the form of a device with a canister that can be carried on the back by the person and the discharge device is a spray lance.

16. Layer and / or roller according to claim 13, wherein the layer and / or the roller includes a battery-operated, remote-controllable trailer (18) which can thus be carried without mechanical connection to the layer or the roller, on which the tank (10), the pressure pump and the discharge device connected to the pressure pump on the tank (10) for discharging calcium hydroxide onto the asphalt layer (5) are mounted.

17. A layer and / or roller according to any one of claims 13 to 16, wherein the calcium hydroxide can be discharged in a direction facing the surface of the asphalt layer (5).

18. A layer and / or roller according to claim 17, wherein the calcium hydroxide can be discharged in a direction perpendicular or substantially perpendicular to the surface of the asphalt layer (5).

19. Use of a layer and / or a roller for applying calcium hydroxide (Ca(OH)2) to an asphalt layer (5) according to one of the preceding claims, wherein the layer and / or the roller includes a tank (10), a pressure pump and a discharge device in the form of a spray bar (11) connected to the pressure pump on the tank (10) for applying calcium hydroxide to the asphalt layer (5).

20. Use of a retrofit kit for a layer and / or a roller for applying calcium hydroxide (Ca(OH)2) to an asphalt layer (5) according to one of the preceding claims, wherein the retrofit kit includes a tank (10), a pressure pump and a discharge device in the form of a spray boom (11) connected to the pressure pump on the tank (10) for applying calcium hydroxide to the asphalt layer (5), and the retrofit kit can be attached or mounted directly on the layer and / or the roller or can be carried by it or therewith by means of a trailer (18).

21. Use of a retrofit kit for a layer and / or a roller according to claim 20, wherein the retrofit kit can be towed by the layer or the roller by means of a trailer (18) or can be carried along with the layer or the roller by means of a battery-operated trailer (18) via remote control or the carryable trailer (18) can be towed or carried by a person operating the layer or the roller.

22. Use according to one of claims 19 to 21, wherein the calcium hydroxide is dischargeable in a direction facing the surface of the asphalt insert (5).

23. Use according to claim 22, wherein the calcium hydroxide can be discharged in a direction perpendicular or substantially perpendicular to the surface of the asphalt insert (5).

24. Asphalt insert (5) wound into a roll (1), produced by one of the processes according to claims 1 to 12.

25. Use of calcium hydroxide (Ca(OH)2) for application to an asphalt insert (5) according to one of the processes according to claims 1-12 or for producing an asphalt insert (5) wound into a roll (1) according to claim 24.

Images