Recapitulation

• Some of the methods for design of bituminous airfield pavement structures are (i) Corps of Engineers (CoE) method, (ii) Federal Aviation Administration method (FAA), (iii) The Asphalt Institute method etc. The CoE and FAA methods are primarily empirical, and based on CBR value and thickness relationship. The Asphalt Institute method is mechanistic empirical, and considers fatigue and rutting failure of the pavement.
• Some of the methods for design of concrete airfield pavement structures are (i) Corps of Engineers (CoE) method, (ii) Federal Aviation Administration method (FAA), (iii) Portland Cement Association (PCA) method etc. These approaches estimates the flexural stresses in concrete slab which is modeled to be resting on elastic springs. The cumulative fatigue damage principle is employed to arrive at the design thickness of the slab.