After 7 days, samples were withdrawn, washed with water and drained up to the point when no humidity could be observed on the surface. Samples were aired, and weighed one minute after being withdrawn from the water; this was determined as Mass 2 m2.
Después de 7 días se retiraron las muestras, se lavaron con agua, se escurrieron hasta que no se viera humedad en su superficie, se ventilaron y se pesaron después de un minuto de sacadas del agua y esto se reportó como Masa 2 m2.