List and briefly describe the four type of joints used in concrete pavements.
What will be an ideal response?
There are four different types of joints placed in concrete pavements: expansion
joints, contraction joints, hinge joints, and construction joints.
Expansion joints are usually placed transversely, at regular intervals, to provide
adequate expansion space for the slab to expand when the pavement is subjected
to an increase in temperature.
Contraction joints are placed transversely at regular intervals across the width of
the pavement to release some of the tensile stresses that are induced due to a
decrease in temperature.
Hinge joints are placed longitudinally mainly to reduce cracking along the
centerline of highway pavements.
Construction joints are placed transversely across the pavement width to provide
suitable transition between concrete placed at different times or on different days.
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