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The processing of natural and manufactured aggregates is described briefly, including exploration to determine the planning of excavation and transportation methods adapted to local conditions; successive steps in processing— cleaning, washing, crushing, screening or sizing, hydraulic classifying, air separation, fine reduction, special processing to remove “soft” particles, flats, etc., storage in bins and stockpiles, recovery from storage and shipping facilities. Manufacture of slag, burned-clay and lightweight aggregates is described briefly. Plant testing and administrative details of commercial operations are referred to.
Rockwood, Nathan C.
Editorial Consultant, Rock Products, Chicago, Illinois