Cold bituminous conglomerate packed in bags, ready for use, consisting of a mixture of grits, crushed sand and mineral additive (filler), hot-mixed with bituminous binder and specific additive of plant origin. Production is carried out with fixed discontinuous plants for bituminous conglomerates, with constant and continuous monitoring of temperature and dosage of aggregates and additive. The conglomerate is left to cool and the addition of bitumen allows to preserve the characteristics of workability of the mix at ambient temperature. Bagging is carried out at ambient temperature after the material cools, with a fully automated and computerised system, in 30 kg packages ready for use.