Question

14. One pavement structure consisting of 2 pavement layers over subgrade has a required structural number (SN) of 5.60. The maximum thickness for granular base is 26 in. Layer coefficient for asphalt surface (a1)is 0.44 and for granular base (a2) is 0.14. The drainage modifying factor is 1.00. Assuming there are two design options for asphalt surface: (a) thickness of 4 in; (b) thickness of 5 in. Determine which design is preferred for asphalt surface and justify your choice with calculations.

Answer 1

answered by: anonymous