Type

Journal Article

Authors

Philip Owende
M. D. Gilchrist
Anton M. Hartman

Subjects

Engineering

Topics
bituminous mixture analytical models fatigue cracking mixtures accelerated loading test in situ testing laboratory test asphalt strain

In-situ Accelerated Testing of Bituminous Mixtures (2001)

Abstract The in-service behaviour of a standard Irish Dense Base Coarse Macadam mixture (DBC) was evaluated by using the material to overlay a road section, which was based upon a weak pavement structure. The response of the layer under a fully laden dual axle truck was examined using a series of pressure cells and asphalt strain gauges that were embedded in the test section. The section was traversed repeatedly until a network of fatigue cracks was observed on the road surface. The transverse horizontal tensile strain was found to be the most critical parameter with respect to crack initiation. When based on in-situ measured strain data, the analytical model that was developed to predict pavement performance on the basis of fundamental laboratory test data, was found to underestimate the in-service fatigue life of the DBC mixture by a factor of 13.5. The underestimation may be attributed to factors that are not accounted for in the analytical models such as material healing, traffic wander and in-situ environmental , which possibly lead to lower fatigue estimates.
Collections Ireland -> University College Dublin -> Mechanical & Materials Engineering Research Collection
Ireland -> University College Dublin -> College of Engineering & Architecture
Ireland -> University College Dublin -> School of Mechanical and Materials Engineering

Full list of authors on original publication

Philip Owende, M. D. Gilchrist, Anton M. Hartman

Experts in our system

1
M. D. Gilchrist
University College Dublin
Total Publications: 172