Q2. Design the concrete mix according to the following conditions: Design Environment: Building frame Required design strength = 21.9 MPa Fewer than 15 tests are available Minimum dimension = 150 mm Minimum space between rebar = 40 mm Minimum cover over rebar = 40 mm Only air entrainer is allowed. Air entrainer: Manufacture specification 6.3 mL/1% air/100 kg cement. Coarse aggregate: 19 mm nominal maximum size, river gravel (rounded) Bulk oven-dry specific gravity = 2.55, absorption = 3.6%, Oven-dry rodded density = 1761 kg/m³ Moisture content = 2.5%, Fine aggregate: Natural sand Bulk oven-dry specific gravity = 2.659, absorption = 0.5%, Moisture content = 2%, Fineness modulus = 2.47:
Q2. Design the concrete mix according to the following conditions: Design Environment: Building frame Required design strength = 21.9 MPa Fewer than 15 tests are available Minimum dimension = 150 mm Minimum space between rebar = 40 mm Minimum cover over rebar = 40 mm Only air entrainer is allowed. Air entrainer: Manufacture specification 6.3 mL/1% air/100 kg cement. Coarse aggregate: 19 mm nominal maximum size, river gravel (rounded) Bulk oven-dry specific gravity = 2.55, absorption = 3.6%, Oven-dry rodded density = 1761 kg/m³ Moisture content = 2.5%, Fine aggregate: Natural sand Bulk oven-dry specific gravity = 2.659, absorption = 0.5%, Moisture content = 2%, Fineness modulus = 2.47:
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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