DK143717B

DK143717B - PLASTIC SHEET TO USE AS REINFORCEMENT LAYER UNDER BITUMINOUS COATINGS

Info

Publication number: DK143717B
Application number: DK641072A
Authority: DK
Inventors: A Corlin
Original assignee: Villadsens Fab As Jens
Priority date: 1971-06-25
Filing date: 1972-12-21
Publication date: 1981-09-28
Also published as: DK143717C

Description

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Opfindelsen angår et plastark til anvendelse som armeringslag under bituminøse belægninger på et betonunderlag, hvilket plastark består af et plastmateriale og et glasfiberarmeringsmateriale.The invention relates to a plastic sheet for use as a reinforcing layer under bituminous coatings on a concrete substrate, which plastic sheet consists of a plastic material and a glass fiber reinforcing material.

Inden brodæk, etageadskillelser og lignende konstruktioner belægges med vejbelægningsmaterialer dækkes de normalt med en fugtisolering på asfaltbasis med det formål at forhindre fugt i at udøve en nedbrydende indvirkning på betonen i brodækket eller etageadskillelsen. Ovenpå fugtisoleringen udlægges normalt et af armeret beton bestående beskyttelses- eller armeringslag, som har en tykkelse på 5-8 cm, og som tjener dels til at fordele trykket fra vejbelægningen og trafikken over fugtisoleringsmembranen og dels til at beskytte fugtisoleringsmembranen mod mekaniske skader ved udlægningen af det bituminøse vejbelægningsmateriale. Det armerede betonlag tjener desuden til at forhindre vejbelægningsmaterialet i at komme i direkte berøring med fugtisoleringsmembranen. Som nævnt udlægges til slut vejbelægningsmaterialerne ovenpå det af armeret beton bestående beskyttelseslag.Before paving, floor separations and similar structures are coated with paving materials, they are usually covered with an asphalt-based moisture insulation for the purpose of preventing moisture from exerting a degrading effect on the concrete in the pavement or floor separation. On top of the moisture insulation, a protective or reinforcing layer having a thickness of 5-8 cm is usually laid, which serves partly to distribute the pressure from the road surface and traffic across the moisture insulation membrane and partly to protect the moisture insulation membrane from mechanical damage by the laying the bituminous paving material. The reinforced concrete layer additionally serves to prevent the paving material from coming into direct contact with the moisture insulating membrane. Finally, as mentioned, the paving materials are laid on top of the reinforced concrete protective layer.

Formålet med den foreliggende opfindelse er at tilvejebringe et som armeringslag under bituminøse belægninger pi et betonunderlag anvendeligt plastark, som kan anvendes som erstatning for det ovennævnte beskyttelseslag ved fremstillingen af en bituminøs belægning på et underlag, specielt et brodæk, hvorved det af armeret beton bestående beskyttelseslag undgås, dels fordi det er dyrt, og dels fordi det som følge af sin vægt og tykkelse forøger omkostningerne ved konstruktionen af broen eller etageadskillelsen og også tilkørselsramperne til disse. Udlægningen af et armeret betonlag er desuden betydeligt mere arbejds- og tidskrævende end udlægningen af et plastark.The object of the present invention is to provide a plastic sheet useful as reinforcement layer under a bituminous coating on a concrete substrate which can be used as a replacement for the above protective layer in the manufacture of a bituminous coating on a substrate, in particular a bridge deck, whereby the reinforced concrete layer is avoided partly because it is expensive and partly because of its weight and thickness it increases the cost of constructing the bridge or floor separation and also the access ramps for these. The laying of a reinforced concrete layer is also considerably more labor and time consuming than the laying of a plastic sheet.

Dette opnås ved hjælp af et plastark, som er ejendommeligt ved, at det består af en på begge sider med overfladisk beliggende glasfibre belagt plastfolie, som har et elasticitetsmodul på højst 5000 2 kp/cm og et Vicat-blødgøringspunkt på mindst 60. En særlig fordel ved dette plastark er, at det kan fremstilles på fabrik og i forbindelse med udlægningen kun behøver at blive udrullet.This is achieved by means of a plastic sheet, which is characterized in that it consists of a plastic film coated on both sides with superficial plastic film, which has a modulus of elasticity of not more than 5000 2 kp / cm and a Vicat softening point of at least 60. The advantage of this plastic sheet is that it can be manufactured at the factory and only needs to be rolled out during laying.

Det er hensigtsmæssigt at anvende folier med et elasticitets-2 modul på højst 5000 kp/cm , idet folier med et større elasticitetsmodul er svære at oprulle og derved er vanskeligere at transportere og udlægge. Folier med et lavere blødgøringspunkt end 60°C tåler ikke påvirkning af det varme bitumenmateriale, specielt stenmaterialet, i et varmt vejbelægningsmateriale, som ved udlægningen kan have en tem- 143717 2 peratur pi f.eks. 130°C, uden at sådanne folier får trykmærker efter eller kan perforeres af det i vejbelægningsmaterialet indgående stenmateriale, således at stenene kan skade også den underliggende fugtisolering-It is advisable to use foils with a modulus of elasticity of no more than 5000 kp / cm, since films with a larger modulus of elasticity are difficult to roll up and thus more difficult to transport and lay. Films with a softening point lower than 60 ° C do not tolerate the influence of the hot bitumen material, especially the rock material, in a hot paving material which, when laid out, can have a temperature of e.g. 130 ° C without such foils getting pressure marks after or perforated by the stone material contained in the paving material, so that the stones can also damage the underlying moisture insulation.

Plastarkets folie bør fortrinsvis have en tykkelse på 0,2-5 mm. Tyndere folier er sårbare og skades let under anvendelse henholdsvis under udlægningen, og tykkere folier kan vanskeligt oprulles med heraf følgende transport- og udlægningsproblemer.The sheet of plastic sheet should preferably have a thickness of 0.2-5 mm. Thinner foils are vulnerable and are easily damaged during use and during laying, respectively, and thicker foils can be difficult to roll up with consequent transport and laying problems.

For at folien ikke skal blive deformeret eller beskadiget, når vejbelægningen udsættes for store forskydningskræfter, f.eks.So that the foil does not become deformed or damaged when the pavement is subjected to excessive shear forces, e.g.

ved kraftig opbremsning af tunge lastbiler, bør plastarket, når det er indlagt i konstruktionen, kunne overføre forskydningskræfter pi 2 mindst 1,0 kp/cm .in case of heavy braking of heavy trucks, the plastic sheet, when installed in the structure, should be able to transfer shear forces pi 2 at least 1.0 kp / cm.

Det har vist sig mest hensigtsmæssigt at anvende en termo-plastfolie, i hvis to ydersider glasfibermaterialet er indsmeltet. Glasfibermaterialet kan hensigtsmæssigt have form af et flor, filt, måtte eller væv. Som følge af, at armeringslaget har en yderside af glasfibre, specielt glasfiberflor eller -filt, opnås på den ene side en særdeles god vedhængning mod det hosliggende bitumenlag i lag konstruktionen, d.v.s. mod såvel den underliggende fugtisolering som den ovenpå liggende vejbelægning, og på den anden side opnås en meget stor modstandsdygtighed mod penetration, specielt af stenmaterialet i vejbelægningen, når dette udlægges og nedtromles af tunge vejmaskiner.It has been found most convenient to use a thermoplastic film in which two outer surfaces of the fiberglass material are fused. The fiberglass material may conveniently be in the form of a web, felt, mat or tissue. Due to the fact that the reinforcing layer has an outer surface of fiberglass, especially fiberglass or felt, on the one hand, a very good adhesion to the adjacent bitumen layer in the layer construction is achieved, i.e. against both the underlying moisture insulation as well as the surface pavement, and on the other hand, a very high resistance to penetration is obtained, especially by the stone material in the pavement when laid and drummed by heavy road machinery.

Man har tidligere forsøgt at undgå det ovenfor omtalte af armeret beton bestående beskyttelseslag ved at anvende en asfaltmasse eller -mastix som fugtisolering. Sådanne materialer må imidlertid udlægges som et lag pi arbejdsstedet og kan desuden kun påføres i meget tynde lag, idet der ellers foreligger risiko for forskydninger mellem de forskellige lag i konstruktionen. I praksis har det derfor været svært at sikre vandtæthed hos et sådant lag af asfaltmasse.Attempts have previously been made to avoid the above-mentioned protective layer of reinforced concrete by using an asphalt pulp or mastic for moisture insulation. However, such materials must be laid out as a layer at the work site and can also only be applied in very thin layers, otherwise there is a risk of displacements between the different layers of the structure. In practice, therefore, it has been difficult to ensure waterproofness of such a layer of asphalt pulp.

Lignende forhold gælder, når asfaltmassen udlægges i to lag med en mellemliggende armering af glasvæv. En anden ulempe ved sådanne asfaltmasselag er, at asfaltmassen har en tilbøjelighed til med tiden at blive sammenblandet med vejbelægningsmaterialet med det heraf følgende resultat, at lagstrukturen i belægningen går tabt.Similar conditions apply when the asphalt mass is laid out in two layers with an intermediate reinforcement of glass tissue. Another disadvantage of such asphalt pavers is that the pavement tends to over time be mixed with the paving material with the resultant loss of the pavement structure of the pavement.

Man har også foreslået anvendelsen af en lang række plastmaterialer som isolationslag på brodæk og etageadskillelser. Således anvendes der i et kendt system epoxytjære, som har fundet stor udbredelse. Andre kendte løsninger af problemet udnytter polyure- 143717 3 than, polyurethantjære og polyestere. For epoxy-, urethan- og polyestermaterialerne gælder, at plasterne piføres i flydende form, enten ved bestrygning eller ved besprøjtning, og som følge heraf opstår der stor risiko for, at der opnls tynde steder i laget.The use of a wide variety of plastic materials such as insulation layers on bridge decks and floor separations has also been proposed. Thus, in a known system, epoxy tar which is widely used is used. Other known solutions to the problem utilize polyurethane, polyurethane tar and polyesters. In the case of the epoxy, urethane and polyester materials, the plastics are dispersed in liquid form, either by coating or by spraying, and as a result there is a great risk that thin places in the layer are obtained.

Disse tre sidstnævnte typer af isoleringslag kan i normale tilfælde heller ikke udlægges ved frostgrader, og desuden kræver de et tørt underlag. Epoxytjæren, som er den mest anvendte, har desuden den ulempe, at isoleringen bliver meget stiv og kan sprække, såfremt der dannes sprækker i den underliggende beton.These three types of insulating layers cannot normally be laid out at frost, nor do they require a dry substrate. The epoxy tar, which is the most widely used, also has the disadvantage that the insulation becomes very stiff and can crack if cracks form in the underlying concrete.

Opfindelsen skal i det følgende belyses nærmere under henvisning til nogle udførelseseksempler.The invention will now be described in more detail with reference to some exemplary embodiments.

EKSEMPEL 1EXAMPLE 1

Rengjort beton, som havde en jævn og fast overflade, blev bestrøget med en asfaltopløsning, som indeholdt et klæbefremmende middel. Ved hjælp af varmklæbningsasfalt med et KoR-blødgøringspunkt pi 85°C piklæbedes herefter følgende lag: 2Clean concrete which had a smooth and firm surface was coated with an asphalt solution containing an adhesive. With the help of hot-glue asphalt with a KoR softening point of 85 ° C, the following layers are then pickled: 2

Et lag 5 mm asfaltplader, som var armerede med 500 g/m glasvæv.A layer of 5 mm asphalt sheets reinforced with 500 g / m glass tissue.

Laget fuldklæbedes.The layer is fully adhered.

22

Et lag asfaltmineralfilt med en vægt på ca. 2 kg/m .A layer of asphalt mineral felt with a weight of approx. 2 kg / m.

Laget fuldklæbedes.The layer is fully adhered.

Et lag af 1,5 mm plastfolie, som bestod af et copolymerisat af 85% ethy-len og 15% vinylacetat, og som på begge sider var belagt med et glasfiberflor. Plastfolien havde en vægtfylde pi 0,93A layer of 1.5 mm plastic film, which consisted of a copolymer of 85% ethylene and 15% vinyl acetate, which was coated on both sides with a glass fiber floor. The plastic foil had a density of 0.93

OISLAND

g/ cm , et smelteindeks på 3, et elasticitetsmodul på 490 kp/ cm2 og et Vicat-blødgøringspunkt på 65°C. Laget fuldklæbedes.g / cm, a melt index of 3, a modulus of elasticity of 490 kp / cm 2, and a Vicat softening point of 65 ° C. The layer is fully adhered.

Direkte ovenpå dette lag udlagdes og nedtromledes en vejbelægning, som bestod af 1,5 cm asfaltbeton med et fint stenmateriale og 4 cm asfaltbeton med et grovere stenmateriale, hvorhos de to asfaltbe-tonlag havde temperaturer på ca. 120 henholdsvis ca. 140°C i udlæg-ningsøjeblikket.Directly on top of this layer was laid and drummed a paving which consisted of 1.5 cm asphalt concrete with a fine stone material and 4 cm asphalt concrete with a coarser stone material, the two asphalt concrete layers having temperatures of approx. 120 and approx. 140 ° C at the time of application.

Claims

EXAMPLE 2 Cleaned concrete having a smooth and firm surface was coated with an asphalt solution containing an adhesive enhancer. Then, using hot adhesive asphalt with a KoR softening point of 85 ° C, adhere to the following phage: A layer of asphalt mineral wool felt with 5 mm styrene foam plastic balls on the bottom 2 o. Weight approx. 2 kg / m. The layer is spot-glued on 25% of the surface. o 2 A layer of 5 mm asphalt sheets with a reinforcement of 500 g / m glass tissue. The layer is fully adhered. A layer of 1.5 mm plastic film consisting of a segment polymerizer of styrene and butadiene having a density of 1.0 g / cm, a melt s 2 index of 3, a modulus of elasticity of 75 kp / cm and a Vicat softening point of 78 ° C. Both plastic film surfaces were coated with molten fiberglass cloth. The layer is fully adhered. On top of this layer was laid and drummed a paving which consisted of 6 cm of asphalt concrete with a temperature of 140 ° C at the moment of paving. With both embodiments, a pavement was obtained in which the protective layer of fiberglass-coated plastic foil was very well anchored to both the substrate and the paving material itself, and which was also found to withstand the large impacts caused by the laying of heavy paving machines, without being punctured by the pavement coating material.

Plastic sheet for use as reinforcing layers under bituminous coatings on a concrete substrate, which plastic sheet consists of a plastic material and a glass fiber reinforcing material, characterized in that the plastic sheet consists of a plastic film coated on both sides with superficial glass fibers having a modulus of elasticity of at most 2 o 5000 kp / crn and a Vicat softening point of at least 60 C.

Plastic sheet according to claim 1, characterized in that the plastic material is a thermoplastic material.