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Tuesday, 2 January 2018

Reinforced Cement Concrete

                                Reinforced Cement Concrete


1.Reinforcement
A.      Mild steel

B.      CTB
2.Cement concrete
A.      Cement
B.      line Agg.(sand)
C.      Coarse Agg(Stone Agg)
D.      Water
E.       Admixtures

v  Cement Concrete 
 1.Grade of concrete               (Table-2/p-16) As per IS Code)
a)      Ordinary concrete               M10 to M20
b)      Standard Concrete              M25 to M55
c)       High Strength Concrete      M60 to M80
Minimum grade recommended for
         RCC=M20
Minimum grade of concrete required in case of concrete used near sea coast or in sea water
            RCC =M30
            RCC=M20
M20           M=Mix
                   20=Characteristic strength of concrete 
2. Characteristic Strength of Concrete
- Characteristic  strength is the value of strength below which not more than 5% of test result are expected to fall.
For example-
If 100 test result are arranged in increasing order.
21.5,22.6,24.8,27.8,28.6,30.2,31,31,31,32.5,32.6,……..,47.8
This concrete is of M30 grade Because
*5%Result are less than 30 N/MM^2

*95%Result are more than 30 N/MM^2 

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