Redes is a vibro-moulded, reinforced concrete cast stone grid paving system that acts as a semi-vegetative blanket on a horizontal or sloped surface. It can also be adapted to gently undulating reliefs.It combines 60% hard surface vs. 40% grass surface, ensuring stable footing in all directions.It is suitable for planting grass blankets in urban environments, preventing the formation of puddles and protecting it from erosion caused by the presence of pedestrians, and the occasional presence of light vehicles with a maximum load of 900 kg per wheel.
Redes was originally designed for the construction and consolidation of the slope surfaces around the Hermegildo Zegna corporate headquarters building, in the municipality of Sant Quirze del Vallés, province of Barcelona.
The square geometry of each piece is in the form of a mesh that contains three concrete platforms connected to each other by concrete ribs hidden beneath the vegetation. Their cross section permits the optimum development and growth of the grass which colonises the empty spaces in different Grassing proportions. Due to its high drainage capacity, it maintains the natural rainwater cycle, re-injecting it into the water table.
The Solar Reflectance Index by UV, visible and near infrared spectrophotometry pursuant to the ASTM E903 standard, obtains a result of SRI=38.2%. The Grassing permeability coefficient is 60% according to measurements contrasted in test laboratories.
Vibro-moulded reinforced concrete paving stones in a 60x60 cm format and with a thickness of 10 cm, with a moulded finish and a fine smooth texture in colur grey. They are laid on a bed of compacted sand with a thickness of 4-6 cm, which in turn is spread over a bed of levelled P.M 95% compacted soil (UNE 103-501-94). It is then filled with topsoil before sowing, or just with sand.