VI. RESEARCH WORK DONE IN ACADEMIC INSTITUTIONS RELATED TO THESIS WORK

A. HIGHWAY PLANNING, MANAGEMENT, PERFORMANCE EVALUATION AND INSTRUMENTATION
5. Structural Evaluation of Airfield Pavements
Date of Start

May 2005
Indian Institute of Technology, Kharagpur (S,I)

 

Scope and Objectives

The broad objective of the study was to propose a methodology for PCN evaluation of rigid and asphalt overlaid rigid pavements. Evaluation of the methodology currently practiced for reporting PCN was also another objective of the work.

 
Methodology
Structural evaluation of some airfield pavement sections was done using Falling Weight Deflectometer (FWD). The load transfer efficiency of the pavement slabs was evaluated using measured deflections and its effect on PCN was studied. Back-calculation of effective moduli of in-service pavements was performed using measured deflections by FWD.
 
Findings and Conclusions
(i) A methodology was proposed for PCN evaluation of rigid and asphalt overlaid rigid pavements using Falling Weight Deflectometer.

(ii) A program AFPCN was developed for back-calculation of elastic modulus of rigid/HMA overlaid rigid pavements and for PCN evaluation of such airfield pavements using FWD data.

(iii) Back-calculation results of the program were validated using ANSYS. The PCN values obtained were found to be reasonable and consistent with the structural data of the pavement.