VARIATION OF PAVEMENT DESIGN WITH ENVIRONMENTAL TEMPERATURE VARIATION

Swapan Kumar Bagui, Atasi Das, Kaushlendra Kumar Verma, Soumadeep Bagui

Abstract


Indian Roads Congress (IRC): 37-2012 is the main guideline for design of flexible pavement. This guideline developed several pavement design charts ready for use based on Average Annual Pavement Temperature (AAPT) which varies from 200 C to 400 C. Environmental condition pertaining to the monthly variation of temperatures have not been considered in the pavement design. This paper presents pavement design considering variation of resilient / elastic modulus value at different time periods throughout the year (month wise) using Indian Institute of Technology(IIT) Pave software and compare conventional pavement design as proposed in IRC: 37 – 2012. A different temperature model has been used to determine pavement temperature month wise. Different resilient moduli (E) values of Bituminous Concrete (BC) and Dense Bituminous Macadam (DBM) have been considered based on air temperatures and design life based on monthly pavement temperature is calculated for each month and average value is adopted for final pavement design life. It has been found that conventional pavement design is underestimated when pavement design is conducted using monthly variation of pavement temperature at design tire pressure of 0.56× 106 N/m2 and below and is overestimated at higher tire pressure. Design life with variation of temperature is found 3 times approximately obtained from conventional method of pavement design. It is also found that rut and fatigue life varies with tire pressure.

Keywords


IIT Pave, average annual pavement temperature, AASHTO, pavement temperature model.

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References


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DOI: https://doi.org/10.11113/mjce.v29.55

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