A mix design for a major sidewalk construction project is required. The concrete will not be reinforced, but will be exposed to freezing and thawing with chlorides. The trial mix strength is 32 MPa (including overdesign) with a 75 mm slump. For the sand; FM = 2.60 and its absorption is 1.2%. The coarse aggregate has a nominal maximum size of 19 mm with an absorption of 1.6% and a dry rodded density of 1720 kg/m3. Determine the mix design amounts for the concrete if the coarse aggregate contains 3% water. (keep all calculations and answers to one decimal place except where indicated. That is, round to one decimal place) Design Water = kg/m3 Water to Cement (W/CM) ratio = (two decimal places) Cement Content = kg/m3 Volume of coarse aggregate per unit volume of concrete = (two decimal places) Estimated total mass of concrete = kg/m3 Design mass of coarse aggregate = kg/m3 Actual mass of coarse aggregate = kg/m3 Actual mass of fine aggregate = kg/m3 Actual mass of water added = kg/m3
QUESTION 2
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A mix design for a major sidewalk construction project is required. The concrete will not be reinforced, but will be exposed to freezing and thawing with chlorides. The trial mix strength is 32 MPa (including overdesign) with a 75 mm slump. For the sand; FM = 2.60 and its absorption is 1.2%. The coarse aggregate has a nominal maximum size of 19 mm with an absorption of 1.6% and a dry rodded density of 1720 kg/m3. Determine the mix design amounts for the concrete if the coarse aggregate contains 3% water. (keep all calculations and answers to one decimal place except where indicated. That is, round to one decimal place)
Design Water = kg/m3
Water to Cement (W/CM) ratio = (two decimal places)
Cement Content = kg/m3
Volume of coarse aggregate per unit volume of concrete = (two decimal places)
Estimated total mass of concrete = kg/m3
Design mass of coarse aggregate = kg/m3
Actual mass of coarse aggregate = kg/m3
Actual mass of fine aggregate = kg/m3
Actual mass of water added = kg/m3
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