A heavily reinforced retaining wall is to be constructed and you are asked to design a concrete mix following the ACI methodology. The concrete mix specifications are: o Characteristic compressive strength of 30 N/mm 2 at 28 days. o Failure rate of 1% o Previous control data yielded a standard deviation of 2 N/mm 2 o Air-entraining is required for extreme exposure o Minimum cement content 450 kg/m 3 o Required slump 160 mm o Maximum aggregate size 10 mm o Fineness modulus of aggregates is 2.90 o Dry rodded mass of coarse aggregates is 1650 kg/m 3 o Relative density of aggregates: 2.5 o Coarse aggregate has 3% moisture. o Fine aggregate has 4% moisture. o Volume of the required trial mix: 18 m 3 Following the ACI step-by-step process estimate the cement content of the mix, the total mix quantities required for this project and Using the ACI volumetric approach, provide the estimated mix quantities for the above specifications and comment on any differences between the mass approached followed in the steps. You do not have to do any moisture adjustments for this answer
A heavily reinforced retaining wall is to be constructed and you are asked to design a concrete mix
following the ACI methodology. The concrete mix specifications are:
o Characteristic compressive strength of 30 N/mm 2 at 28 days.
o Failure rate of 1%
o Previous control data yielded a standard deviation of 2 N/mm 2
o Air-entraining is required for extreme exposure
o Minimum cement content 450 kg/m 3
o Required slump 160 mm
o Maximum aggregate size 10 mm
o Fineness modulus of aggregates is 2.90
o Dry rodded mass of coarse aggregates is 1650 kg/m 3
o Relative density of aggregates: 2.5
o Coarse aggregate has 3% moisture.
o Fine aggregate has 4% moisture.
o Volume of the required trial mix: 18 m 3
Following the ACI step-by-step process estimate the cement content of the mix, the total mix quantities required for this project and Using the ACI volumetric approach, provide the estimated mix quantities for the above specifications and comment on any differences between the mass approached followed in the steps. You do not have to do any moisture adjustments for this answer
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