In cement concrete pavements, tensile stress is due to:
(A) Bending or deflection under wheel loads
(B) Difference in temperature of the top and bottom of pavement
(C) Contraction of slab during falling temperature
(D) All the above
(A) Bending or deflection under wheel loads
(B) Difference in temperature of the top and bottom of pavement
(C) Contraction of slab during falling temperature
(D) All the above