The New York Times

SAMPLES OF PAVEMENT ARE CAREFULLY TESTED; Asphalt, Sand and Rock Taken From Actual Roads Subjected to Examination in Laboratory A Box of Pavement. Asphalt, Sand and Rock.

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Nature

Separation of Bitumen from Bituminous Sands

THE separation of the bitumen from the Alberta bituminous sands by washing with hot water has been under study by the Research Council of Alberta for a number of years. It has been found that ...