The nominal cover to concrete is the distance from the exposed concrete surface to the nearest reinforcement. It is crucial for durability and protection of reinforcement from corrosion. Different exposure conditions necessitate different minimum covers.
The nominal cover to meet the requirements of durability for M45 grade concrete under various exposure condition is given below: Exposure | Minimum nominal cover (mm) ------- | -------- 1. Mild | a. 40 2. Severe | b. 45 3. Very severe | c. 50 | d. 20 - (1) 1 $\rightarrow$ a, 2 $\rightarrow$ b, 3 $\rightarrow$ c - (2) 1 $\rightarrow$ d, 2 $ \rightarrow$ b, 3 $\rightarrow$ c - (3) 1 $\rightarrow$ d, 2 $\rightarrow$ a, 3 $\rightarrow$ c - (4) 1 $\rightarrow$ d, 2 $\rightarrow$ a, 3 $ \rightarrow$ b
Asked in Local Self Government Dept. Exam 2022 · Topic: Physical Properties of Materials (Elasticity and Plasticity)
Show answer
Answer: C. 1 $\rightarrow$ d, 2 $\rightarrow$ a, 3 $ \rightarrow$ c
More Physics questions
- IS : 456 : 2000 specifies the modulus of elasticity of concrete (Ec) as
- In the limit state design of concrete structure, the strain distribution is assumed to be and rectangular
- Why is spring made of steel and not of copper?
- The elastic potential energy per unit volume of the wire (W) is
- The average depth of Indian ocean is about 3000 m. The fractional compression, $ \frac{\Delta V}{V}$ of water at the bottom of the ocean would be (given that the bulk modulus of water is $2.2 \times 10^9$ Nm$^{-2}$ and g = 10 ms$^{-2}$)
- Which of the following is/are nearly perfect plastic body/bodies?
- If Young’s Modulus of a body is Infinite, the body is - A) perfectly flexible - B) weightless - C) fluid - D) perfectly rigid
- The Young's Modulus of a perfectly rigid body is