A concrete mix was designed for a concrete road pavement (i.e. heavy mass concrete). A 28-day...

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Civil Engineering

A concrete mix was designed for a concrete road pavement (i.e.heavy mass concrete). A 28-day strength of 26 MPa is required. Theexposure classification for durability purposes is C. One hundredlaboratory test results on the controlling mix show a standarddeviation of 5.3 MPa (k=1.65). The density of crushed coarseaggregate is 2850 kg/m³ and its dry rodded density is1600 kg/m³ and the maximum size to be used is 10 mm. Thespecific gravity of fine aggregate is 2750 kg/m³ and itsfineness modulus is 3.0. The high early strength cement used has adensity of 3150 kg/m³.
Find the weight (in kg) of cement, water, fine and coarseaggregate for this mix, required to make a 0.25 m high x 3.6 m widex 12 m long concrete pavement using the ACI Method.

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3.5 Ratings (415 Votes)

Ans Let the total volume of trial mix be 1 According to ACI 211191 table 631 slump required for massconcrete platform is 25 50 mm According to table 633 for 50mm slump and nominal aggregate size of 10 mm amount of waterrequired per cubic meter of concrete is 207 kg Amount of water 207 kgFrom See Answer

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