Inventory of aggregates in an expanding urban area

摘要: Faced with a potential shortage of aggregate, the Minnesota Department Transportation funded study to inventory aggregates in four pilot areas state and compare it estimated requirements these areas. Based on results study, several methods were suggested enhance aggregate supply The resources determined by analyzing geology deposits, both natural crushed rock. In addition, reserves permitted properties using questionnaire that was given each quarry operator Permitted defined as those for which permits have been issued government unit having jurisdiction. Analysis date supplemented interviews county highway department personnel local planning agencies. Aggregate demand from national models demand. Computer-aided multiple regression relationships between construction public private facilities, ratio non-metal metal products, price aggregate. Four enhancing supply. These included definition quantity quality vicinity urban areas, improvement beneficiation techniques maximize utilization mined material, development end-use specifications permit maximum use lower grade recycled pavements, revision land regulations prevent loss sprawl.