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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/21520
Title: Determination of Effective Depth to Measure Temperature Required for Structural Evaluation of Asphalt Pavements
Authors: Walia A.
Rastogi, Rajat
Kumar, Praveen Kishore
Jain S.S.
Published in: Journal of Transportation Engineering Part B: Pavements
Abstract: Performance evaluation of asphalt concrete (AC) pavements requires measurement of the temperature at a specified depth. Most of the guidelines recommend a fixed depth from the top of the pavement surface. Researchers have also suggested taking depth as a fraction of the thickness of the AC layer. However, variability in depth value is not considered and correlated with the total thickness of the AC layer. This study aims to arrive at a depth at which the measured temperature will be the best representative temperature of the AC layer. Four instrumented test sections with varying AC layer thickness were constructed and temperature data at different depths were recorded for an entire year. It was observed that the temperature gradient sets in and depends upon the layer thickness, time of the day, and environmental conditions. To negate their effect, an effective depth concept was proposed. Two approaches, based on weighted average temperature and inflection point theory, were used to arrive at the effective depth. The results from both approaches were found to be similar. The effective depth was found fluctuating within the top 20% to 50% of the AC layer, and was influenced by the total thickness of the AC layer. The effective depth converged to a midpoint depth of the AC layer when the pavement temperature exceeded 40°C. The temperature measurement at the effective depth further recommended an optimal time for scheduled maintenance. © 2021 American Society of Civil Engineers.
Citation: Journal of Transportation Engineering Part B: Pavements, 147(3)
URI: https://doi.org/10.1061/JPEODX.0000290
http://repository.iitr.ac.in/handle/123456789/21520
Issue Date: 2021
Publisher: American Society of Civil Engineers (ASCE)
Keywords: Asphalt concrete (AC) pavement
Effective depth
Pavement temperature
Residual life
Thickness
ISSN: 25735438
Author Scopus IDs: 57219309285
7202416770
55466569500
35594194300
Author Affiliations: Walia, A., Dept. of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
Rastogi, R., Dept. of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
Kumar, P., Dept. of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
Jain, S.S., Dept. of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
Funding Details: The authors acknowledge the support provided by the Institute and Water Resource Development and Management Department in allocating space for the construction of instrumented test sections in the Agromet field laboratory. The authors also acknowledge the Mechanical and Industrial Engineering Department's support in providing metrological data.
Corresponding Author: Rastogi, R.; Dept. of Civil Engineering, India; email: rajat.rastogi@ce.iitr.ac
Appears in Collections:Journal Publications [CE]

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