Find the weight (in kg) of cement, water, flyash, fine and coarse aggregate to produce a...

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Civil Engineering

Find the weight (in kg) of cement, water, flyash, fine andcoarse aggregate to produce a cement/flyash mix for a column, usingthe British Method that has a characteristic 28-day compressivestrength of 60 MPa. One hundred laboratory test results on thecontrolling mix show a standard deviation of 6.0 MPa (k=1.65). Theexposure classification for durability purposes is A1 and theconditions require a fly ash/ high early strength cement blend(with a 40% proportion of fly ash). The specific gravity of thecrushed coarse 20 mm aggregate to be used is 2850 kg/m3 and its dryrodded density is 1600 kg/m3. The specific gravity of fineaggregate is 2750 kg/m3 and its fineness modulus is 2.7. Assume thehigh early strength cement density is 3150 kg/m3 and fly ashdensity to be 2500 kg/m3

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4.3 Ratings (577 Votes)

Ans Let the total volume of trial mix be 1 m3 According to British method slump suitable for construction of column is 75 mmFor 75 mm slump and nominal aggregate size of 20 mm amount of water required per cubic meter for high strength concrete is 175 kg Amount of See Answer

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