Pit & Quarry, December 2017
WASHING CLASSIFYING A quarry operation in Hawaii comes across a unique solution for its mountain of waste coarse aggregate EDITED BY KEVIN YANIK ven paradise has problems David Gomes general manager of Hawaiian Cements Maui Concrete and Aggregate Division faced growing demand for Grade A high density stone at the companys Puunene Quarry E At the same time the quarrys coarse aggregate reserves were increasingly becoming contaminated with pumice Selective mining only resulted in more waste rock and crushing produced too many fines pushing the problem into finer grades of sand without increasing the tonnage of Grade A stone Thus some creative thinking was required FROM TRASH TO CASH 62 PIT QUARRY December 2017 pitandquarry com PHOTOS BY ANDREW SNOBY With origins dating back to 1939 and nine locations today Hawaiian Cement leases seven quarries on three of the main Hawaiian Islands
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