The slab for a sidewalk and pavilion outside of a building in central Long Island is to be made of concrete with the fol

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The Slab For A Sidewalk And Pavilion Outside Of A Building In Central Long Island Is To Be Made Of Concrete With The Fol 1 (46.1 KiB) Viewed 14 times

The slab for a sidewalk and pavilion outside of a building in central Long Island is to be made of concrete with the following specifications: • Design compressive strength: 3000 psi, based on 20 tests of samples having a standard deviation of 250 psi Air entrained, and clear space of rebar: 2 inches Fine aggregate: G = 2.42, FM = 2.5 • Coarse aggregate: G= 2.57, bulk density = 2900 lb/cy Determine the following: i. w/c ratio, largest nominal max. coarse aggregate size, % coarse aggregate, % air (2 pts.) ii. weight of water, weight of cement, and weight of coarse aggregate to be used per cubic yard of concrete (1 pt.) iii. weights and volumes of water, cement, air, coarse aggregate, and fine aggregate needed to mix a 5-yard batch of this mix (3 pts.) Also: . • Specify two admixtures that might be used for this mix based on the provided information, and why to use it. (2 pts.) Why we might create a composite of this concrete poured into a PVC (polyvinyl chloride) sleeve for these columns? (Give specific reasons based on the characteristics of the individual materials.) (2 pts.)