Resheeting Material Performance

[A] % Passing 26.5mm

[B] % Passing 4.75mm

[C] % Passing 2.00mm

Grading Coefficient =

Grading Coefficient = (A-C)/B*100

[D] % Passing 0.425mm

[LS] % Linear Shrinkage

Shrinkage Product =

Shrinkage Product = D*LS

Source: Neural networks for performance prediction on unsealed roads' by Lea, Paige-Greene and Jones, RTR 1999.
Refer also IPWEA Lower Order Road Design Guideline