STUDY ON THE BEHAVIOUR OF PAVEMENT COMPONENT MATERIALS UNDER REPEATED WHEEL LOADS

Abstract

aweP4t design methods of highway and airfield pavements are based on eori index of the strum of pavement component t .terials obtained from toots iWh*td. In the load magnitude increases slowly and is allowed to either remain for some _... ,.ifi time period or until some BpeCUisd rate of deformatton to reached. Results ofsuch teats have been correlated empirically to ide • reasonat►la and reliable bars La fat design. Bow.ver, so" pavements have failed even thouqh their design was base 00 this principle, Such observationslead to inn► tigattons for studying the effects of repeated loads on various layers of the pavement section,, Thereu fore in r :mort years, it has been increasingly realm that the uiodern dsinofhighway and airfLei should include some un nt*l conai.c ti o s for the cyclic; nature of traffic load applications, rxsvestiqstions an pavement component materials have shorn that their behaviour under static load tests is not indicative of behaviour under repetitive loading more realistic and s iiul at. he pavement behaviour more closely thsn the static loading. This dissertation asinly presents the critical report on the investigations carried out upto date on various pavement materials such as sails • biturno aw paving mixtures# sail went, and cøment concrete materials 0 The thettuniantetion0004 in varies tests have also been descries Results obtained have been critic 1 ' analysed and dicused to min a better understanding of the behaviour of paving estarials a* that the thickness detersainations zasy be eccornpflsh.d a more, rational and realistic approach