MATERIALS FOR CONCRETE. 1
~Cement:~ Portland Cement--Natural Cement--Slag Cement--Size and Weight of
Barrels of Cement--Specifications and Testing. ~Sand:~ Properties of Good
Sand--Cost of Sand--Washing Sand; Washing with Hose; Washing with Sand
Ejectors; Washing with Tank Washers. ~Aggregates:~ Broken
Stone--Gravel--Slag and Cinders--Balanced Aggregate--Size of
Aggregate--Cost of Aggregate--Screened and Crusher Run Stone for
Concrete--Quarrying and Crushing Stone--Screening and Washing Gravel.