Recycled rubber pavements: Fid-Bau Portal

Recycled rubber pavements

Short notice given only substantially as follows: A paving material for footways that is strong and lightweight is the subject of European Patent EP 1277883. Dainippon Inc & Chemicals Inc of Tokyo, Japan, discloses a two-layer structure: the upper layer is made from rubber chips (crumbs); the lower layer consists of a fibre-reinforced synthetic resin, which also serves to bind the rubber. The rubber crumbs are obtained by shredding. Crushed fragments of waste rubber may also serve. The rubber crumbs should have a proportion of hard rubber to prevent slipping and offer greater elasticity. The binding agent used with these chips should be polyurethane. The fibre-reinforced plastic used as the lower layer should be a thermosetting resin shaped by press moulding. It may include a radical curable unsaturated and a thermosetting resin. This can be made using a sheet moulding compound or a bulk-moulding compound. White rubber crumb was obtained from a waste ethylene-propylene-diene rubber. Crushed rubber fragment obtained from a moulded bath made in a beige unsaturated polyester resin was mixed with a one-pack urethane prepolymer and red oxide powder. These ingredients were mixed for about five minutes at room temperature to produce the material for the surface of the product. The lower layer was made with crushed fragments from an artificial marble counter and was charged into a separate mixer. With this unsaturated polyester resin and curing accelerator provided the basis for the lower layer.