What are the differences between construction joints and expansion joints?

Question

Accepted Answer

Construction joints and expansion joints are used in construction to accommodate movement, but they serve different purposes.

Construction joints are used to separate different sections of a structure that are poured at different times.
Expansion joints are used to allow for the expansion and contraction of materials due to temperature changes.
Construction joints are typically formed by placing a keyway or dowel between the two sections to provide load transfer.
Expansion joints are often filled with flexible materials like rubber or neoprene to allow for movement.
Examples of construction joints include joints between concrete slabs in a building or between different pours of a bridge deck.
Examples of expansion joints include joints in a concrete pavement or in a bridge to accommodate temperature changes.

Accepted Answer

construction joint-A construction joint occurs when there are multiple concrete placements.

Expansion Joint-An expansion joint is used in concrete and steel.

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