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A contraction joint is provided in concrete pavement to
  • a)
    prevent contraction of the pavement
  • b)
    permit cracking at the joint
  • c)
    lower the bending moment in the pavement in order to reduce pavement thickness
  • d)
    lower the temperature gradient across the depth of the pavement
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A contraction joint is provided in concrete pavement toa)prevent contr...
Contraction Joint is provided to prevent contraction, Usually, steel bars and sealant material is used to form a contraction joint.
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Most Upvoted Answer
A contraction joint is provided in concrete pavement toa)prevent contr...
Explanation:
A contraction joint is provided in concrete pavement to prevent the contraction of the pavement. When the concrete pavement is laid during construction, it is in a plastic state and has a high moisture content. As the concrete sets and hardens, it undergoes shrinkage due to the loss of moisture. This shrinkage can cause cracking in the pavement if provision is not made to accommodate the contraction.

A contraction joint is a planned crack in the pavement that allows for the natural contraction of the concrete without causing random cracking. The joint is formed by placing a joint filler material in the gap between two adjacent slabs. This filler material can be made of asphalt, cork, or other materials that are flexible and can withstand the movement of the pavement.

Benefits of contraction joints:
- Prevent random cracking in the pavement due to contraction
- Allow for the natural contraction of the concrete without causing damage
- Provide a neat and uniform appearance to the pavement
- Reduce maintenance costs by minimizing the need for repairs due to cracking

Conclusion:
In conclusion, a contraction joint is an important feature of concrete pavement that helps prevent cracking and damage due to the natural contraction of the concrete. It is an essential component of any concrete pavement design and should be included in all construction projects where concrete pavement is used.
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Community Answer
A contraction joint is provided in concrete pavement toa)prevent contr...
B
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A contraction joint is provided in concrete pavement toa)prevent contraction of the pavementb)permit cracking at the jointc)lower the bending moment in the pavement in order to reduce pavement thicknessd)lower the temperature gradient across the depth of the pavementCorrect answer is option 'A'. Can you explain this answer?
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