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Consider the following statements:
1. In a concrete pavement temperature stress is tensile at bottom during day time.
2. In a concrete pavement load stress is compressive at bottom.
Which of these statements is/are correct?
  • a)
    Only 1
  • b)
    Only 2
  • c)
    Both 1 and 2
  • d)
    Neither 1 nor 2
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements:1. In a concrete pavement temperatur...
Answer:

Compressive Stress at Bottom of Concrete Pavement

Statement 2 is correct. In a concrete pavement, load stress is compressive at the bottom. This is because of the following reasons:

- Concrete is a strong and rigid material that can withstand compressive forces better than tensile forces.
- The weight of the vehicles passing over the pavement causes a compressive force on the concrete.
- The pavement is designed so that the thickness and strength of the concrete are enough to resist these compressive forces.

Tensile Stress at Top of Concrete Pavement

Statement 1 is incorrect. In a concrete pavement, temperature stress is tensile at the top during the daytime. This is because of the following reasons:

- Concrete expands when it is heated and contracts when it is cooled. Therefore, when the temperature rises during the day, the concrete expands and creates tensile stresses at the top of the pavement.
- The bottom of the pavement is not affected by temperature changes as much as the top because it is in contact with the ground, which has a relatively constant temperature.

Conclusion

In summary, statement 2 is correct, but statement 1 is incorrect. The load stress is compressive at the bottom of a concrete pavement, while temperature stress is tensile at the top during the daytime.
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Consider the following statements:1. In a concrete pavement temperatur...
A should be the correct answer.
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