Gravel Beneficiation in Michigan


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Title: Gravel Beneficiation in Michigan

Author(s): Frank E. Legg. Jr. and William W. McLaughlin

Publication: Journal Proceedings

Volume: 57

Issue: 1

Appears on pages(s): 813-826

Keywords: none

Date: 1/1/1961

Michigan natural gravel is now competing with imported high quality coarse aggregates intended for concrete subject to severe winter exposure, as a result of installation of various types of beneficiation plants. Thus, local deposits are being utilized, after upgrading, without sacraficing concrete quality . This development was prompted in large measure by the decision of the Michigan State Highway Department that aggregate quality standards Gould not be relaxed despite the greatly increased emend of the accelerated highway construction program. Many of Michigan’s lower pehinsula glacial gravels have been found particularly amenable to upgrading by heavy media separation, although commercial installations of elastic fractionation, jigs, and soft tors are being tried.