A flexible pavement consists of surface layer (asphaltconcrete), granular base layer and subbase layer. Please determinethe thickness of each layer using AASHTO (1993) design method usingthe Design Chart
- Design ESAL = 2 million
- It takes approximately one week for water to be drained fromwithin the pavement, and the pavement structure will be exposed tomoisture levels approaching saturation for 40 percent of thetime
- Resilient modulus of subgrade is 9000 lb/inch/inch; Resilientmodulus of base is 31,000 lb/inch/inch; Resilient modulus ofsubbase is 13,500 lb/inch/inch
- Reliability level = 99%
- Standard deviation = 0.5
- Initial serviceability index, pi = 4.5; Terminal serviceabilityindex, pi = 2.5
- a1 = 0.44; a2 = 0.14; a3 = 0.10
