Time Domain Reflectometry Measurements of Road Basecourse Moisture Content
Abstract
This paper describes an empirical transform between the propagation time (tp) data obtained from a non invasive Time Domain Reflectometry (TDR) sensor to the percentage moisture content θv within two different road making basecourse aggregate material. Results show that a simple quadratic fit between tp and θv can be given leading to a maximum error in the estimate of 0.55%. It is also shown that the dielectric model underlying each of the basecourses is different enough to warrant the use of a unique quadratic function (i.e. different quadratic coefficients) for each.
© 2020 Ian G. Platt, Ian Woodhead, Sean Richards, Adrian Tan, Michael Hagedorn, Phil Herrington, Shaun Cook, published by Macquarie University, Australia
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