Volumetric propertiesAfter the optimum emulsion content, added water and bitumen content were selected according to the procedure explained in sections 3.2.1 and 3.2.2. One series of three samples was mixed and compacted according to the immersion-compression procedure. Another series of three samples was manufactured following the Marshall procedure. Immediately after compaction, the specimens of the two series were subjected to a 3-day curing process in an oven at 50°C. Then, the air and remaining water voids were calculated in each series according to the standard UNE-EN 12697-8 (AENOR 2007d) as follows: