Asked by: Lijiao Aguirreburralde
asked in category: General Last Updated: 14th March, 2020

What are control joints and isolation joints?

What are control joints and isolation joints? Explain the purpose and typical locations for each in a concrete slab. control joints – intentionally weakened sections through concrete slab. Resist tensile forces caused by concrete drying.

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Keeping this in view, what is an isolation joint?

An isolation joint is a separation between adjacent sections of a concrete structure to allow relative movement in three directions and through which all of the bonded reinforcement is interrupted. A construction joint is the interface between concrete placements intentionally created to facilitate construction.

Furthermore, what is expansion and contraction joints? An expansion joint or movement joint is an assembly designed to hold parts together while safely absorbing temperature-induced expansion and contraction of building materials, and vibration, or to allow movement due to ground settlement or seismic activity.

In respect to this, what is the difference between expansion joints and control joints?

A control joint is used to reduce the occurrence of shrinkage in concrete, and it is usually a continuous, vertical joint filled with mortar. An expansion joint is a continuous or horizontal joint. Unlike control joints, expansion joints are left completely free of mortar.

Should you seal expansion joints?

Expansion joints must be sealed with a flexible sealant, like QUIKRETE Self-Leveling Polyurethane Sealant or QUIKRETE Non-Sag Polyurethane Sealant (dependent on application), or an expansion joint strip, to prevent water from penetrating the joint and deteriorating the sub-base.

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