66. Sand, stones and soil falling and gushing on conveyor belt and going up, then forming a pile of sand. Separation of sand in the construction industry. Separating sand and small and large stones. Wet sand falls from conveyor belt creating huge pile. Processing of sand for paving ( asphalting ) on open pit. Process refinement of sand for concreting on construction site. Preparation sand for asphalt in the yard of construction company. Preparing sand for concrete in heavy industry. Machines working and conveyor line transporting sand. Grains of sand poured into a heap for brickwork. Large amounts of sand. Hard work, machinery, equipment, building, cement, cement factory, transport, crusher, grind, grinding, extraction, daylight, wonderful sunny day, outdoors, close up.