M15 should not be used in structural concrete. In addition, it is better to mix design instead of using the nominal mixes mentioned by others!
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M15 should not be used in structural concrete. In addition, it is better to mix design instead of using the nominal mixes mentioned by others!
1:2:4 is all about the proportion of the concrete while M15 is the compressive strength of whatever mix you use. In this case (15 N/mm2)
M15 ratio is 1:2:4 in which one part is cement, 2 part is sand and 4 part is aggregate mix with water
Nominal mix for m15
1:2:4
Dry volume for concrete 1.51
Cement 315 kg ppc
Sand .43 m³ × density of sand
Aggregate .86m³ × density of aggregate
20mm,10mm ratio use as workable trial mix
1:2:4 (cement:fine aggregate:coarse aggregate)
1:2:4