Assume pavement configuration compute pavement responses using structural models compute allowable number of repetitions of standard axle using distress models find expected number of repetitions of standard axle on design lane from traffic analysis. The object of the design using the aashto method is to determine a flexible pavement sn adequate to carry the projected design esal. Goliya3 1 (department of civil engg., sati vidisha,mp) 2 (prof., department.
PPT Introduction to Pavement Design Concepts PowerPoint
Different combinations of base and surfacing course for flexible pavement for the purpose of the guideline, suggested in irc:37 (2012), flexible pavements include pavements with bituminous surfacing over:
Traffic in the aashto flexible pavement design, traffic is considered in terms of esal for the terminal psi (table 20.13 for pt = 2.5.) we must assume the structural number of the pavement.
Higher sn means stronger pavement, thus the impact of traffic on pavement deteriorations is less. So, we must check if the final sn 3 is similar to the assumed sn. Design methods for flexible pavements zstandard sections zsurface deflection based method zasphalt institute (ai) method zaashto design method zothers. The design procedure is used for esal > 50,000 for the.
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The method discussed in the text applies to esals greater than 50,000 for the performance period. Mechanistic method of pavement design. If so, share your ppt presentation slides online with powershow.com. Pavement constructed of bituminous & granular materials.
January 2018 table of contents i table of contents chapter/section title page no.
Structural design the objective of the aashto method is to determine a flexible pavement stuructural number (sn) adequate to carry the projected design esal. A structure that maintains intimate contact with subgrade and distribute loads to it, and depends on aggregate interlock, particle friction, and cohesion for stability. Journal of engineering research and applications www.ijera.com vol. Higher sn means stronger pavement, thus the impact of traffic on pavement deteriorations is less.
So, we must check if the final sn3 is similar to the assumed sn.
Revision of the sa flexible pavement design method is the property of its rightful owner. Flexible pavement design manual revised:
