The sand employed is of rounded-edge grain and siliceous type, which has water absorption of 1.87%; fineness modulus of 2.95; and density of 2.66 g/ml.
La arena empleada tipo silíceo y grano de canto redondeado, presenta una adsorción de agua de: 1.87%; módulo de finura: 2.95; densidad: 2.66 g/ml.