## Question:

## As per IS 456:2000, the maximum compression strain in concrete in axial compression is taken as:

A) 0.002 B) 0.0035 C) 0.0025 D) 0.003

### Explanation:

According to** IS 456:2000, Plain Concrete and Reinforced Concrete Code **of Practice (Clause 6.2), the maximum usable compressive strain in concrete in axial compression is taken as **0.002. **This value is applicable for design calculations.

**The choice of 0.002 as the maximum compressive strain is based on the stress-strain curve of concrete**, where beyond a strain of 0.002, the slope of the curve decreases significantly indicating impending failure. Limiting the maximum compressive strain to 0.002 provides a factor of safety against failure in design.

Therefore, option** A is the correct answer**.

Options B, C and D are incorrect values as per IS 456:2000. **The maximum compressive strain of 0.0035 may be achieved in some high strength concrete but 0.002 is specified by IS 456 **for design. Options C and D are also not the specified maximum strain values.