Concrete is required for an interior concrete column in a commercial building in Corvallis, Oregon. A specified compressive strength, f'c, of 4000 psi is required at 28 days using an ASTM C 150 Type I. The design calls for a minimum of 3 in. of concrete cover over the reinforcing steel. The minimum distance between reinforcing bars is 2.5 in. A slump of 4 inches should be the target. No statistical data on previous mixes are available. Follow mixture proportioning according to Portland Cement Association (PCA) - Design and Control of Concrete Mixtures, Kosmatka and Wilson, 201 16'h Edition. Materials Available: ASTM C 150 Type IVII Cement Relative density of 3.15 Coarse Aggregate: well-graded ' in. maximum-size aggregate (MSA), local river gravel Oven-dry specific gravity: 2.60 Absorption : 1.2% Oven-dry rodded bulk density: 102.4 lb/ft3 Moisture content of coarse stockpile: 3.0% Fine Aggregate: well-graded, local natural sand Oven-dry specific gravity: 2.55 Absorption: 2.0% Moisture content of fine stockpile: 3.8% Fineness Modulus: 2.60