1.1.Design a trial mix that requires a characteristic strength of 35 MPa at 28 days, 25 mm slump and a W:C of 0.43 for d

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1 1 Design A Trial Mix That Requires A Characteristic Strength Of 35 Mpa At 28 Days 25 Mm Slump And A W C Of 0 43 For D 1 (49.62 KiB) Viewed 15 times

1.1.Design a trial mix that requires a characteristic strength of 35 MPa at 28 days, 25 mm slump and a W:C of 0.43 for durability. Cement Type: CEM I 42.5 N Dc 3.14 Sand Ds 2.8 FM 2.1 Quality: Excellent stone Da=2.60 Size = 19.0 mm CBD 1460 kg/m3 Assume degree of control to be 'Good' and moderate vibration (15) 1.2.The trial mix requirements in Question 1.1. above was altered as follows: Cement Type: CEM I 42.5 N De = 3.18 Sand Ds = 2.55 FM 2.60 = Quality: Average stone Da = 2.80 Size = 19.0 mm CBD 1800 kg/m3 Assume degree of control to be 'Average and moderate vibration The required characteristic strength at 28 days was reduced to 25 MPa and a slump of 75 mm at a moderate vibration. (10)