ORIGIN OF DEVELOPMENTS FOR STRUCTURAL DESIGN OF PAVEMENTS

Abstract : Information has been compiled on the source or basis of the various aspects of design and evaluation criteria for pavements. An attempt has been made to convey understanding of the requirements, concepts, developments, impacting constraints, and unplanned occurrences relating to the assembling of pavement behavior knowledge for the 40 years following the initial concern beginning in 1940. Individual coverage is provided, with pertinent interacting comment, for nine separate elements: (1) flexible pavement design methodology, (2) strength test and material characteristics for flexible pavements, (3) bituminous mix design and behavior, (4) rigid pavement design methodology including overlay design, (5) tests and materials for rigid pavements, (6) traffic and loading, (7) compaction requirements, (8) distress, failure, and terminal condition, and (9) concepts held and responses programmed.