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Q: Expansion joints are provided of the length of concrete structure exceeds
  • A. 10m
  • B. 15m
  • C. 35m
  • D. 45m
Correct Answer: Option D - The function of an expansion joint in rigid pavement is to allow free expansion. The maximum thickness of expansion joint in rigid pavement is 25 mm. Maximum spacing of expansion joint in rigid pavement range from 25–27m in jointed reinforced concrete slab and from 40m (for slab < 230 mm thick) to 60m (for slabs > 230 mm thick) in unreinforced concrete.
D. The function of an expansion joint in rigid pavement is to allow free expansion. The maximum thickness of expansion joint in rigid pavement is 25 mm. Maximum spacing of expansion joint in rigid pavement range from 25–27m in jointed reinforced concrete slab and from 40m (for slab < 230 mm thick) to 60m (for slabs > 230 mm thick) in unreinforced concrete.

Explanations:

The function of an expansion joint in rigid pavement is to allow free expansion. The maximum thickness of expansion joint in rigid pavement is 25 mm. Maximum spacing of expansion joint in rigid pavement range from 25–27m in jointed reinforced concrete slab and from 40m (for slab < 230 mm thick) to 60m (for slabs > 230 mm thick) in unreinforced concrete.