The Westergaard formula for rigid pavement design is used to calculate:
Choose the correct answer
Subgrade CBR value
Critical bending stresses in concrete slab for corner, edge, and interior loading conditions
Pavement deflection under traffic only
Superelevation of rigid pavement
Correct Answer
B. Critical bending stresses in concrete slab for corner, edge, and interior loading conditions
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Westergaard''s formulae for rigid (concrete) pavement: (1) critical stresses at interior, edge, and corner loading; (2) considers concrete slab acting as elastic plate on Winkler foundation (modulus of subgrade reaction k). Critical stress at corner: σc = 3P/h² × [1 − (a√2/l)^0.6] where l = radius of relative stiffness, a = load radius.
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