Project on Concrete Mix Design for various grades of Concrete
Concrete Mix Design for M35 grade coincrete with flyash
1.Targeted Mean Strength
f'ck = fck +1.65s
f'ck= 35+(1.65*5)
=43.25N/mm2
2.max Water cement ratio as per IS 456,
0.45 therefore adopt .34
3.Max water content =186 litres/cum adapt the same
Water content as per slump 120mm =201 litre
water content after admixture 1% adding=156 litre
4. calculation of cement
a.water cement ratio =.34
b.water content =156 litre/cum
c.cement +flyash =460kg/cum
d.flyash 50%=230.00kg/cum
e.cement= 230kg/cum
5.Propotion of aggregate
a.volume of coarse aggregate as per IS 10262-2019=0.62
b.Volume of Fine aggregate =0.38
6. Mix Design calculation
a. Volume of cement =mass of cement/sp. gravity of cement/1000=0.073cum
b.volume of fly ash =mass/sp. gravity/1000=.089cum
c.volume of water=0.15640cum
d.Volume of chemical=0.00387cum
e.Volume of all in aggregate=0.667cum
f.mass of 20mm=694kg
g.mass of 10mm =441kg
h. mass of sand (F.A)=683kg
i.Sp. gravity of admixture=1.19
j.Sp. gravity of flyash =2.57
Calculation of design mix for M50 concrete without fly ash
Grade of cement = OPC 043
sp. gravity of cement = 3.15
sp. gravity of sand =2.61
sp. garvity of 20mm = 2.65
sp. gravity of 10mm = 2.66
1. Targeted Mean strength
f'ck = 58.25N/mm2 for M50
2.Cement & water calculation
a.Min. Cement =400kg/cum as per IS 10262
b.water cement ratio =0.45 assume 0.35
c. water content as per IS 10262 = 180 kg/cum
d.Due to admixture , water content (20% deduct)=180*0.8=144 kg/cum
e.cement content=0.35/144=412kg/cum
3.Fine aggregate and Coarse aggregate calculation
a.Vol. of concrete = 1 cum
b.vol. of cement = 412/(3.15*1000)=0.1308 cum
c. vol. of water = 144/(1*1000)=0.1440 cum
d.vol. of admixture = 4.994 /(1.145/1000)=0.0043cum
e.vol. of other materials except F.A & C.A =(0.1308+0.1440+0.0043)=0.2791
f. vol of F.A & C.A=1-0.2791=0.7209 cum
g.vol. of F.A = 0.7209*33%=0.2379 cum (assume 33% )
h.vol. of C.A = 0.7209-0.2379=0.4830 cum
i. Mass of Fine Aggregate= 0.2379*2.61*1000=621kg/cum
j.Mass of Coarse aggragate= 0.4830*2.655*1000=1284 kg/cum
k.20mm:10mm=0.55:0.45 we adopt the ratio
then mass of 20mm=706kg
Mass of 10mm= 578 kg
l.Mass of admixture(1.2% of cement)=5.064 litre / cum