EP0648896B1 - Lateral guiding strip for water on roads - Google Patents

Abstract

This water guide strip comprises a flexible prefabricated body (1) based on ground rubber particles, in particular recycled ground rubber, and rock granulates or ground plastic waste, these particles and these granulates or this ground waste being agglomerated by a binder, the said strip being bonded onto the surfacing of the roadway. Application to the verges of motorways. <IMAGE>

Description

The present invention relates to a lateral bead for guiding water for road.

To avoid gullying along highways built in embankments, it is advisable to guide runoff water to descents on the slopes of the slopes. For this, it is common to install a device guiding the water drained towards the entry of these descents. This device, to be protected from shocks, is generally placed under the slide that borders the road.

A commonly used solution is to install a bituminous asphalt in the form of a bead along lateral edges of the roadway. This asphalt is a extruded mixture of bitumen and rock aggregates. However, its implementation requires a machine special extrusion and, during repairs to the pavement, disassembly of the slides. In addition, we gets a bad finish on the connections at the level water descents.

It is still known to glue beads precast concrete. Work in curves and near downspouts is then made very difficult because the borders are rigid. This solution is therefore costly in masonry labor.

The invention aims to provide a bead lateral water guide which allows to overcome of these disadvantages, that is to say that is slight, easy to install even in the presence of a slide which can easily follow the curves of the track and connect to the downspouts, despite a low cost price.

To this end, the subject of the invention is a lateral bead for guiding water for roadways, characterized by the characterizing part of the claim 1.

The following water guide bead the invention may include one or more of the features described in subclaims 2 to 9.

DE-A-2758696 describes a bead usable as a border, especially for sports grounds, consisting of a flexible body with based on particles of crushed rubber, crushed cork and a binder. A flexible frame is embedded in this body.

• la Figure 1 est une vue en perspective d'un tronçon d'un bourrelet suivant l'invention;
• la Figure 2 est une vue schématique en coupe transversale d'un bord latéral d'une chaussée d'autoroute équipé d'un tel bourrelet; et
• la Figure 3 est une vue schématique en perspective correspondante.

Examples of embodiments of the invention will now be described with reference to the appended drawing, in which:

• Figure 1 is a perspective view of a section of a bead according to the invention;
• Figure 2 is a schematic cross-sectional view of a side edge of a highway pavement equipped with such a bead; and
• Figure 3 is a schematic corresponding perspective view.

Figure 1 shows a section of bead 1 constituted by a flexible molded or extruded body having a determined length, typically 3 m. This bead is made from crushed recycled rubber particles coming in particular from recycled tires, aggregates rocky as well as a binder, which is for example a polyurethane.

In order to get both good cohesion of the bead and an advantageous cost price, rubbery waste and aggregates have neighboring particle sizes, in particular of the order of 2 to 5 mm, and similar volume proportions (excluding binder), about 50% for each of them. The binder represents 7% of the total volume of the bead. This mixture with three constituents can be shaped by molding, or extruded and then cut. Cross section of a section is constant and trapezoidal, with two right angles and the other two at 45 °, so that obtain a side 2 inclined at 45 °. When installing the bead, this inclined face is oriented towards the middle of pavement. The width of the upper face 3 of the bead is slightly smaller than the height of the vertical outer face 4, and about twice as much smaller than the width of the underside 5, which rests on the road.

As a numerical example, we can choose as widths of faces 3 and 5, respectively 6 and 13 cm, and 7 cm as face height 4.

Figures 2 and 3 show the bead 1 bonded to the bituminous coating 6 of the highway, under the safety barrier 7 to protect it. The face lower 5 of the bead is fixed directly to the coating 6 with a layer of adhesive 8 allowing a good adhesion between the rubber used and the road surface. We prefer here to use as glue bitumen with incorporated elastomer, an example being commercially available composition under the brand BITULASTIC registered.

We see that it is not necessary to dismount the safety barrier to glue the sections of the bead, which have flexibility notable. Thus, their radius of curvature can reach 1 m, it is easy to follow the curves of the roadway and connect the bead to the inlet of the downpipes of water 9 fitted out at certain locations along the lateral slope 10 of the highway (Figure 3). At least in these areas of strong curvature, in addition to bonding, it can be necessary to maintain the sections of the bead by mechanical parts such as nails.

The installation of these lateral beads is made easy by their lightness, their weight being about 8 to 9 kg / m. It is also understandable that the quantity of rock aggregates can vary according to the particular applications envisaged.

Alternatively, the rock aggregates can be replaced with plastic waste crushed, for example polypropylene from bumpers automotive, cross-linked polyethylene (PER) from pipes or polyvinyl chloride (PVC) from bottles. This waste is crushed from so as to have a particle size analogous to that of rock aggregates, and are incorporated substantially in the same volume proportion. We thus obtain clearly reduced beads.

Claims (9)

1. Lateral water guidance buffer for roads, characterised in that it consists of a supple prefabricated body (1) with a base of ground rubber, notably recycled ground rubber particles and rock aggregates or ground waste plastic material. These particles and these aggregates, or this ground waste are conglomerated with a binder and the proportions per unit volume of the particles of rubber and the rock aggregates or the said ground waste close to one another. The said buffer can be stuck to the road surface.
2. Buffer following claim 1,characterised in that the binding agent is a polymer with a polyurethane base.
3. Buffer following claim 1 or 2, characterised in that the size distribution of the particles of ground rubber and the rock aggregates or the said ground waste are close, notably in the region of 2 to 5 mm.
4. Buffer following any of the claims 1 to 3, characterised in that the quantity of binding agent represents about 7% of the total body (1) volume of the buffer.
5. Buffer following any of claims 1 to 4, characterised in that the body (1) is in continuous sections.
6. Buffer following any of the claims 1 to 5, characterised in that the cross section of the body (1) consists of a face tilted (2) notably at 45°, towards the middle of the road.
7. Buffer following claim 6, characterised in that the cross section of the body (1) is trapezoid.
8. Water guidance device for roads, consisting of a buffer following any of claims 1 to 7, stuck to the road surface by means of a glue which is a bitumen with an incorporated elastomer and combines directly with the body of the buffer.
9. Device following claim 8, characterised in that at least in the areas in which it is curved, the buffer (1) is further held on the road by mechanical instruments.

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