Example of Mix design proportion calculation
• You need to design the mix proportion of a grade 40 for a columnwith workability of 50
mm slump and w/c not more than 0.55. The maximum size of gravelaggregate is 10 mm
and the fine aggregate is quarry blast sand. The moisture contentof the aggregate is as
follow:
• The gravel aggregate is in moist condition with moisture contentof =3.5%, dry density
= 1700 kg/m3
• The sand is in moist condition with saturated surface dry density= 2600 kg/m3
. Percent
passing at 600ïm =35%,water absorption = 0.5%,
• Aggregate relative combined density (saturated surface dry) =2.60
• Cement used is Sulfate Resistance because part of column is insoil identified to contain
sulfate
