Project on Concrete Mix Design for various grades of Concrete
Q1) Concrete mix Design for M35
Ans:
- Target mean strength for M35 grade concrete
- Fck=fck+1.65s
- Fck=35+1.65*5
- Fck=43.25 N/mm2
2.Determination of water cement ratio
- As per IS 456 Table no.5 Water cement ratio = 0.45
3.Selection of water content
- Water cement ratio for 100mm slump= 186+0.06*186
=197.16
As we use super plastisizer we can reduce water content to be reduced depewndws on the type of super plastisizer
- Percentage of reduction in water content =20%
- =198-0.20*198
- =160
4.Calculation of cement and fly ash content
- W/C ratio=0.45
- Total cementious ratio=160/0.45
=355.55kg
- We replace 30% of cementious material with Flyb ash
- Fly ash content=355.6*0.30
=106.68
- Cement content requirement= Cementious content - Fly ash content
- =355.56 - 106.68
- =249
5.Coarse and fine aggregate
- Coarse aggregate ratio=0.63
- Fine aggregate ratio=0.37
6.mix calculation for M35 grade concrete
- Volume of concrete=1Cu.m
- Total volume of cement =Cement/SG*1000
=249/3.15*10000
=0.079
- Total volume of fly ash =Fly ash/SG*1000
- =107/2.5*1000
=0.0428
- Volume of water= Water/SG*1000
- =160/1*1000
- =0.160
- Volume of plastisizer=Superplastisizer/Sg*1000
- =2.35/1.12*1000
- =0.002
- Total aggregates =A-(B+C+D+E)
- =1-(0.079+0.0420.160+0.002)
- =0.709
- Coarse aggregates=F*CA*SG*1000
- =0.71*0.63*2.74*1000
- =1225.6
- Fine aggregate =F*FA*SG*1000
- =0.71*0.37*2.74*1000
- =719.8
- Cement fly ash sand aggregate water and super plastisizer needed for M35 grade concrete
| Sr.No | MATERIALS | QUANTITY |
| 1 | CEMENT | 249KG |
| 2 | FLY ASH | 106.68KG |
| 3 | FINE AGGREGATE | 720KG |
| 4 | COARSE AGGREGATE | 1226KG |
| 5 | WATER | 160L |
| 6 | SUPERPLASTISIZER | 2L |
CEMENT MIX RATIO: CEMENT: FLY ASH:FA:CA
: 1:0.42: 2.61:4.458
Q2) Concrete mix Design for M50
Ans:
- Target mean strength for M5201 grade concrete
- Fck=fck+1.65s
- Fck=50+1.65*5
- Fck=58.25 N/mm2
2.Determination of water cement ratio
- As per IS 456 Table no.5 Water cement ratio = 0.35
3.Selection of water content
- Water cement ratio for 100mm slump= 186+0.06*186
=197.16
As we use super plastisizer we can reduce water content to be reduced depewndws on the type of super plastisizer
- Percentage of reduction in water content =20%
- =198-0.20*198
- =160
4.Calculation of cement and fly ash content
- W/C ratio=0.35
- Total cementious ratio=160/0.35
=457.14kg
- We replace 30% of cementious material with Flyb ash
- Fly ash content=457.14*0.30
=137.14
- Cement content requirement= Cementious content - Fly ash content
- =457.14 - 137.14
- =320
5.Coarse and fine aggregate
- Coarse aggregate ratio=0.63
- Fine aggregate ratio=0.37
6.mix calculation for M35 grade concrete
- Volume of concrete=1Cu.m
- Total volume of cement =Cement/SG*1000
=320/3.15*10000
=0.101
- Total volume of fly ash =Fly ash/SG*1000
- =137/2.5*1000
=0.0548
- Volume of water= Water/SG*1000
- =160/1*1000
- =0.160
- Volume of plastisizer=Superplastisizer/Sg*1000
- =2.35/1.12*1000
- =0.002
- Total aggregates =A-(B+C+D+E)
- =1-(0.101+0.548+0.160+0.002)
- =0.189
- Coarse aggregates=F*CA*SG*1000
- =0.71*0.63*2.74*1000
- =1225.6
- Fine aggregate =F*FA*SG*1000
- =0.71*0.37*2.74*1000
- =719.8
- Cement fly ash sand aggregate water and super plastisizer needed for M35 grade concrete
| Sr.No | MATERIALS | QUANTITY |
| 1 | CEMENT | 320KG |
| 2 | FLY ASH | 137.14KG |
| 3 | FINE AGGREGATE | 720KG |
| 4 | COARSE AGGREGATE | 1226KG |
| 5 | WATER | 160L |
| 6 | SUPERPLASTISIZER | 2L |
CEMENT MIX RATIO= CEMENT: FLY ASH:FA:CA
1:0.428: 2.61:4.458