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Crushed stone is used for concrete aggregate, for road building, and, in the case of limestone, as flux in blast furnaces and for chemical applications. The quarrying technique consists of drilling and blasting to fragment the rock. A large number of charges are fired at one time, producing up to 20,000 tons of broken stone in one blast. The ...
2018-3-10 If you have any other questions concerning size standards, contact a Size Specialist at your ... 212311 Dimension Stone Mining and Quarrying 500 212312 Crushed and Broken Limestone Mining and Quarrying 750 212313 Crushed and Broken Granite Mining and Quarrying 750 212319 Other Crushed and Broken Stone Mining and Quarrying 500 212321 Construction Sand and Gravel Mining
2015-1-19 Other Crushed and Broken Stone Mining and Quarrying. Nonmetallic Minerals Services, Except Fuels (except geophysical surveying and mapping and site preparation and related construction activities performed on a contract or fee basis) ÷ 213115. Support Activities for Nonmetallic Minerals (except Fuels) 1 ; 1481 (site