Question { 19907 }

how you calculate the qty. of cement ,sand,aggregate from
proportion 1:2:4 M15

Answer

To find the individual ratio of materials we have to use one
formula,
Sand = 0.46% of cement
Aggre= 0.92% of cement

For ratio 1:2:4
to find cement qty: (0.46%/2)*1440kg= 331Kg
For ratio 1:3:6
to find cement qty: (0.46%/3)*1440kg= 221Kg

Question { L&T, 27587 }

what is the weight of a cubic meter of M10 concrete?

Answer

Actually M10 is the PCC ...so as per Engineering Hand book,
the unit wt. of
PCC = 2.24 M.T
Rcc = 2.4 M.T
Lime concrete = 1.92 M.T.

So the M10= 2.24 M.T/ cum

Question { L&T, 12380 }

what is mean by design concrete

Answer

Design concrete :-


Using of ingredients{Materials) in correct proportion
to give better( Safer ) strength, workability & durability.