A Comparative Evaluation of the Structural Performance of Papua New Guinea River Gravel Using the Repeat Load Triaxial (RLT)- a Performance-Based Test

8 Pages Posted: 12 Dec 2017

See all articles by Maling Ambranga

Maling Ambranga

affiliation not provided to SSRN

Rod Fincham

Cardno

Mirzi Betasolo

Papua New Guinea university of Technology

Date Written: February 19, 2017

Abstract

Roads in Papua New Guinea (PNG) do not appear to perform to design expectations. Premature pavement failure followed by rapid deterioration seems to be the current trend in PNG’s road systems. Most roads in PNG are built using river gravel as unbound granular material (UGM) for pavement. The use of river gravels is believed to be one of the causes of early pavement failure in PNG even though it complies with the current specifications. The present method of characterizing the unbound granular pavement base materials which are the most critical component of the pavement layer is inadequate. The current empirical characterization and specification of pavement materials are ineffective in that the tests employed do not take into account the real in-service performance of the pavement under cyclic traffic loading. Recent development and advancement in pavement engineering have revealed that the relevant materials’ characteristic parameters should undergo testing through more representative performance-based tests. These new tests offer more insight into the physical behavior for fair characterization by simulating the in-service conditions of the pavement materials under cyclic traffic loadings. In this study, four samples of common PNG base course materials including river gravel were tested in New Zealand using the Repeat Load Triaxial (RLT) testing apparatus (a performance-based test). The results showed that the river gravels were extremely moisture-sensitive compared to coronous and limestone. Thus, the study concluded that the use of River Gravel as UGM is one of the leading causes of premature pavement failure that contributes to poor road performances in PNG.

Keywords: Unbound, Granular Materials, Pavement, Base Materials, Performance-Based Tests

Suggested Citation

Ambranga, Maling and Fincham, Rod and Betasolo, Mirzi, A Comparative Evaluation of the Structural Performance of Papua New Guinea River Gravel Using the Repeat Load Triaxial (RLT)- a Performance-Based Test (February 19, 2017). Papua New Guinea University of Technology, Global Virtual Conference in Civil Engineering (GVCCE) 2016. Available at SSRN: https://ssrn.com/abstract=3084408

Maling Ambranga (Contact Author)

affiliation not provided to SSRN

Rod Fincham

Cardno ( email )

Australia

Mirzi Betasolo

Papua New Guinea university of Technology ( email )

Department of Civil Engineering Unitech Independen
Taraka Campus
Lae, Morobe 411
Papua New Guinea
6754734600 (Phone)

HOME PAGE: http://www.unitech.ac.pg

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