Module 4: Pavement Design

Lecture 29 Rigid pavement design

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Frictional stresses

The frictional stress $\sigma_f$ in kg/cm$^2$ is given by the equation

$$\sigma_f = \frac{WLf}{2\times10^4}$$ (1)

where $W$ is the unit weight of concrete in kg/cm$^2$ (2400), $f$ is the coefficient of sub grade friction (1.5) and $L$ is the length of the slab in meters.