Halbert Powers Gillette

Halbert Powers Gillette
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CHAPTER I. METHODS AND COST OF SELECTING AND PREPARING MATERIALS FOR CONCRETE. Concrete is an artificial stone produced by mixing cement mortar with broken stone, gravel, broken slag, cinders or other similar fragmentary materials. The component parts are therefore hydraulic cement, sand and the broken stone or other coarse material commonly designated as the aggregate. CEMENT. At least a score of... more...