Module 4: Pavement Design

Lecture 29 Rigid pavement design

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Design of joints

Expansion joints

The purpose of the expansion joint is to allow the expansion of the pavement due to rise in temperature with respect to construction temperature. The design consideration are:

• Provided along the longitudinal direction,
• design involves finding the joint spacing for a given expansion joint thickness (say 2.5 cm specified by IRC) subjected to some maximum spacing (say 140 as per IRC)

Figure 1: Expansion joint