Material characterization for pavement construction
The following material properties are important for both flexible and rigid pavements.
When pavements are considered as linear elastic, the elastic moduli and poisson ratio of subgrade and each component layer must be specified.
If the elastic modulus of a material varies with the time of loading, then the resilient modulus, which is elastic modulus under repeated loads, must be selected in accordance with a load duration corresponding to the vehicle speed.
When a material is considered non-linear elastic, the constitutive equation relating the resilient modulus to the state of the stress must be provided.
However, many of these material properties are used in visco-elastic models which are very complex and in the development stage. This book covers the layered elastic model which require the modulus of elasticity and poisson ratio only.