Q1. Using the British method, design a concrete mix to bear an average compressive strength of 20 MPa at 28 days. Consider the following properties: Cement used is: Sulphate Resisting Portland cement with a specific gravity of 3.15. Required slump = 30 – 60 mm Coarse aggregate: %3D uncrushed rocks Maximum size of 20 mm, The fine aggregate: uncrashed rocks The fine aggregate falls in zone 2 Assume zone A for figure 1 Assume K = 1.64 Please note: Do not Adjust the amount of water in the mix design
Q1. Using the British method, design a concrete mix to bear an average compressive strength of 20 MPa at 28 days. Consider the following properties: Cement used is: Sulphate Resisting Portland cement with a specific gravity of 3.15. Required slump = 30 – 60 mm Coarse aggregate: %3D uncrushed rocks Maximum size of 20 mm, The fine aggregate: uncrashed rocks The fine aggregate falls in zone 2 Assume zone A for figure 1 Assume K = 1.64 Please note: Do not Adjust the amount of water in the mix design
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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1.target mean strength fm (mpa)
1. 28.12
2. 33.12
3. 40.12
4. 25.12
2.w/c ratio
1. 0.58
2. 0.61
3. 0.51
4. 0.48
3 .the free water content is (kg/m3)
1. 180
2. 205
3. 190
4 .160
4.total aggregate content is (kg/m3)
1. 1889.7
2. 1869.7
3. 1899.7
4. 1879.7
5.the coarse aggregate is (kg.m3)
1. 1150.51
2. 1170.51
3. 1130.51
4. 1190.51
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