Determination of insitu flexible moduli of modified pavement materials

Gordon, Craig (2005) Determination of insitu flexible moduli of modified pavement materials. [USQ Project] (Unpublished)


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The aim of this project is to determine the flexible moduli for cement, lime and
bituminous modified pavement materials for use in future mechanistic pavement
design in North Queensland by back analysis using 'CIRCLY' which is a
mechanistic pavement design computer software program.
Three trial pavement areas throughout the Far North Queensland area have been
monitored over the past years and will be analysed on their performance over this
time. The three trial sections chosen are all in extremely wet areas of Far North
Queensland's wet tropics, near the small town of Innisfail, which is approximately
100 km's south of Cairns. The rainfall in the Innisfail area has been known to exceed
7 metres for a year.
A secondary aim is to attempt to determine a correlation between the actual rutting
of three trial road sections by using existing traffic volumes and a 'cumulative
damage factor' computed by 'CIRCLY'. This inturn allows a theoretical rut
calculation to be compared with the actual rut in the field. The goal is to verify
whether the input parameters that are being used in the 'CIRCLY' program are
representative of what is actually happening in the field.
Presently in Far North Queensland, mechanistic pavement designers are using what
are considered to be conservative moduli for the purpose of designing insitumodified
pavements. By collecting data and performing back analysis using
'CIRCLY', a more accurate moduli can be determined with the intent to aid in
designing a more economical road network.
Thus, the overriding aim of this project is to identify different moduli for the
different binder-material combinations encounted in Far North Queensland so as to
develop a more economical pavement with predictable performance when
rehabilitating roads in the region.

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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 11 Oct 2007 00:12
Last Modified: 02 Jul 2013 22:30
Uncontrolled Keywords: pavement materials, mechanistic pavement designer, CIRCLY, North Queensland
Fields of Research (FoR): 09 Engineering > 0905 Civil Engineering > 090502 Construction Engineering

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