Exploitation of all types of gravel pits, in particular manufacturing, supplying and marketing gravel-based materials (asphalt, concrete, etc.), operation of disposal sites for excavation materials and inert waste (DCMI); purchase and sale of all types of sand and gravel and trade in all other products that may result from them; acquisition, holding, encumbrance or disposal of real estate; carrying out general business activities; acquisition, management or disposal of participations in other companies (cf. statutes for full purpose).