What is the formula for Olders Theory in Rigid Pavements

The parameter used to evaluate the strength of subgrade in rigid pavement is :a.CBR %b.Modulus of subgrade reactionc.Noned.K %

What is the formula for getting the Thickness of a Pavement using Expansion Pressure

An interstate highway pavement composed of an HMA surface course, a cement treated base course and a sand-gravel subbase is to be designed for an ESAL of 2 * 10^6 . The quality of drainage is considered poor with more than 30 % of time the pavement will be exposed to moisture levels approaching saturation. The material properties are summarized below: effective roadbed resilient modulus = 5500 psi, resilient modulus of subbase = 15000 psi, resilient modulus of cement-treated base is 60,000 psi and resilient modulus of HMA = 4.0 * 10^5 psi. Determine the thicknesses of the surface, base and subbase courses required by assuming a minimum thickness for HMA.

Thickness of Pavement Using McLeod’s Method

. A test is conducted to compare the tread wear of certain type of tires on highways paved with asphalt and highways paved with concrete. Road tests were conducted with the same type of tires on two types of highways. Summary data on the mileage of the tires up to a certain level of wear are given below. Sample Size Sample Mean Sample Standard Dev. Asphalt 35 29,700 9,700 Concrete 35 25,500 7,800 Does this information suggest that tires wear faster on concrete-paved highways than asphalt paved highways? Test using  = 0.01. Use the 5 step method.