A rigid pavement is designed with a 10-inch slab, an E_c of 6 million Ib/in^2, a concrete modulus of rupture of 432 Ib/i
Posted: Sun May 08, 2022 9:09 pm
A rigid pavement is designed with a 10-inch slab, an E_c of 6 million Ib/in^2, a concrete modulus of rupture of 432 Ib/in^2, a load transfer coefficient of 3.0, an initial PSI of 5.0, and a TSI of 2.5. The overall standard deviation is 0.35, the modulus of subgrade reaction is 190 lb/in^3, and a reliability of 95% is used along with a drainage coefficient of 0.89. The pavement is designed assuming that traffic is composed entirely of trucks (200 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 SN of 4 and is expected to last the same numler of years as the rigid pavement. What is the assumed soil resilent modulus? (Assume that all other factors are the same as for the rigid pavement). Please report your answer as a decimal in units of Ib/in^2.