Question:
What is the minimum grade of concrete recommended in coastal areas according to IS 456:2000?
What is the minimum grade of concrete recommended in coastal areas according to IS 456:2000?
Show Hint
For durability:
\[
\boxed{
\begin{array}{c|c}
\text{Exposure Condition} & \text{Minimum Grade} \\ \hline
\text{Mild} & \mathrm{M20}\\
\text{Moderate} & \mathrm{M25}\\
\text{Severe / Coastal} & \mathrm{M30}
\end{array}
}
\]
Updated On: Jul 23, 2026
- M20
- M25
- M30
- M15
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Recall the durability requirements of IS 456:2000.
Concrete exposed to coastal or marine environments requires higher durability because of chloride attack and severe exposure conditions.
Step 2: Identify the recommended minimum grade. As per IS 456:2000, the recommended minimum grade of concrete for coastal exposure is \[ \boxed{\mathrm{M30}.} \] Hence, \[ \boxed{(C)} \] is the correct answer.
Step 2: Identify the recommended minimum grade. As per IS 456:2000, the recommended minimum grade of concrete for coastal exposure is \[ \boxed{\mathrm{M30}.} \] Hence, \[ \boxed{(C)} \] is the correct answer.
Was this answer helpful?
0
0
Top TS PGECET Civil Engineering Questions
- A man weighing \( W \) newtons entered a lift which moves with an acceleration of \( a \, \text{m/s}^2 \). When the lift is moving downward, the force exerted by the man on the floor of the lift is:
- The magnitude of the resultant of two equal forces each of magnitude \( F \) is \( \sqrt{2}F \). Then the angle between their line of action is:
- The equation of motion of a particle starting from rest along a straight line is \( x = t^3 - 3t^2 + 5 \). The ratio of the accelerations after 5 s and 3 s will be:
- A tennis player returns a ball by hitting it with a racket. If the force exerted by the racket on the ball is increased, then the impulse imparted to the ball:
- Radius of gyration is that distance which when squared and multiplied with total mass of the body gives
View More Questions
Top TS PGECET Concrete Questions
- In PERT analysis, the time estimates of activities and probability of their occurrence follow
- The maximum area of tension reinforcement in beams shall not exceed ____ of the total area.
- Cantilever retaining walls can safely be used for a height not more than:
- Maximum distance between expansion joints in structures as per IS: 456–2000 is:
- The minimum headroom over a stair must be
View More Questions
Top TS PGECET Questions
- If \( P = \begin{pmatrix} 1 & 1 & 1 \\ 0 & 1 & 2 \\ 0 & 0 & 1 \end{pmatrix} \) is the modal matrix of \( A = \begin{pmatrix} 1 & 1 & 0 \\ 0 & 2 & 2 \\ 0 & 0 & 3 \end{pmatrix} \) then the sum of all the elements of \( P^{-1}AP \) is
- If the system of equations \( kx + y + z = k - 1 \), \( x + ky + z = k - 1 \), and \( x + y + kz = k - 1 \) has infinite solutions, then \( k \) is
- The value of the integral \( \int_C (2xy - x^2) \, dx + (x^2 + y^2) \, dy \) where \( C \) is the boundary of the region enclosed by \( y = x^2 \) and \( y^2 = x \), described in the positive sense, is
- Let \( f(x) = \log x \). The number \( C \) strictly between \( e^2 \) and \( e^3 \) such that its reciprocal is equal to \( \frac{f(e^3) - f(e^2)}{e^3 - e^2} \) is
- The solution of the differential equation \( (D^2 + 2)y = x^2 \) is
View More Questions