Working on major construction project that requires considerable amounts of concrete to be used,you are asked to design a concrete mix following the BRE methodology. The concrete mixspecifications are:o Characteristic compressive strength of 50 N/mm 2 at 7 days.o Failure rate of 1%o Previous control data yielded a standard deviation of 5 N/mm 2o CEM-I 52.5o Air-entraining is not requiredo Required slump 50 mmo Maximum cement content is 550 kg/m 3o Coarse aggregate: Uncrushed maximum size 10mmo Fine aggregate: Uncrushed with 45% passing 600 μm sieveo Relative density of aggregates: 2.7o Assume both types of aggregate as SSD.Proceed with the concrete mix design methodology and comment on any implications during thisprocess.
Working on major construction project that requires considerable amounts of concrete to be used,
you are asked to design a concrete mix following the BRE methodology. The concrete mix
specifications are:
o Characteristic compressive strength of 50 N/mm 2 at 7 days.
o Failure rate of 1%
o Previous control data yielded a standard deviation of 5 N/mm 2
o CEM-I 52.5
o Air-entraining is not required
o Required slump 50 mm
o Maximum cement content is 550 kg/m 3
o Coarse aggregate: Uncrushed maximum size 10mm
o Fine aggregate: Uncrushed with 45% passing 600 μm sieve
o Relative density of aggregates: 2.7
o Assume both types of aggregate as SSD.
Proceed with the concrete mix design methodology and comment on any implications during thisprocess.
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