PERMANENT PLASTIC FORMWORK SYSTEM
The invention relates to a permanent plastic formwork system formed by two parallel surfaces, namely an outer surface (1) and an inner surface (2), consisting of a plurality of flat or longitudinally curved, hollow, extruded plastic slats (4) provided internally with metal stiffening sections (13) and joined longitudinally by tongued-and-grooved ends (4a and 4b), separators (5) being disposed between the two surfaces. Said separators are provided with a threaded zone (6) and an inclined appendage (8) for securing the rebar mesh (3) located between the surfaces. The slats (4) are secured to the ground using U-shaped parts (9) containing a threaded rod (10) that can be used to clamp and attach same. In addition, in closed structures diagonal reinforced internal elements can be incorporated, such as metal bars (11) with flat end surfaces (12) enabling same to be secured to the above-mentioned inner surface (2).