1. A concrete batch consists of: 1 bag of Cement, 0.056 m³ fine sand, 0.104 m³ coarse aggregate, and 24 liters of water. Knowing that the bulk density of sand and coarse aggregate is 1500 & 1650 kg/m³, respectively, and the specific gravity of sand and coarse aggregate is 2.65, Calculate the following: a. the ratio of the mix components and w/c ratio b. quantities for 1 cubic meter 2. Design a concrete mix knowing that: a. Cement content = 6 bags/m³ b. w/c ratio 0.50 c. Sand content 45% of all-in aggregate d. Specific gravity of sand & coarse aggregate = 2.60 e. Bulk density of sand & coarse aggregate = 1660 kg/m³ f. Admixture dosage = 0.75% of cement weight g. Density of admixture = 1.15 kg/L h. Air content = 4%

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