Engineering, 12.03.2020 18:50, YamiletRdz721
Concrete is required for an exterior column located above ground where substantial freezing and thawing is not a concern. The 28-day compressive strength should be 4,000 lb/in^2. The column dimensions are 12" by 12" with rebar spaced with 2" clear spacing and 1.5" cover (rebar to form).The properties of the materials are as follows:Cement : Type I, specific gravity = 3.15Coarse Aggregate: Bulk specific gravity (SSD) = 2.80;
absorption capacity = 2%;
dry-rodded unit weight = 115 lb/ft^3;
moisture content = 1%Maximum coarse aggregate size availability: 1/2in, 3/4in, 1in or 1.5inFine Aggregate: Bulk specific gravity (SSD) = 2.7;
absorption capacity = 1.3%;
moisture content = 3.7%;
fineness modulus = 2.80Use Slump 1 to 2 inches, and no air entraining1. Calculate the initial weights of water, cement, dry rodded coarse aggregate,(SSD) coarse aggregate, (SSD) fine aggregate, and volume of air per yd^3 of concrete.
2. Calculate the final weights (after moisture adjustments) of cement, coarse aggregate (stockpile), fine aggregate (stockpile), and water to be added to the batch per yd^3 of concrete. Include units.
Answers: 3
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Concrete is required for an exterior column located above ground where substantial freezing and thaw...
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