A rigid pavement is designed with a 10-inch slab, an Ec of 6 million lb/in2, a concrete modulus of rupture of 432 lb/in2, a load transfer coefficient of 3.0, an initial PSI of 4.7, and a terminal serviceability index of 2.5. The overall standard deviation is 0.35, the modulus of subgrade reaction is 190 lb/in3, and a reliability of 90% is used along with a drainage coefficient of 0.8. The pavement is designed assuming traffic is composed entirely of trucks (100 per day).
Each truck has one 20- kip single axle and one 42-kip tandem axle (the effect of all other vehicles is ignored).
A section of this road is to be replaced (due to different subgrade characteristics) with a flexible pavement having a structural number of 4 and is expected to last the same number of years as the rigid pavement. What is the assumed soil resilient modulus?
(Assume all other factors are the same as for the rigid pavement.)