What's New
RTA Supplement to Austroads Guide to Pavement Technology Released
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CIRCLY and Mechanistic Pavement Design: The Past, Present and Towards the Future
It has been about 30 years since CIRCLY, originally a FORTRAN program for analyzing Layered Elastic Media subject to surface loads, was released by CSIRO. This paper gives an overview of how CIRCLY has evolved – from the first mainframe version, to the current user-friendly Windows based, version 5.0 as the standard pavement design package used in 35 countries. The development of CIRCLY has closely tracked the evolution of the Austroads mechanistic flexible pavement design procedure.
Support for Windows 7
Mincad Systems is pleased to announce our commitment to Windows 7 by supporting this new operating system.
The following packages fully support Windows 7:
The latest version of CIRCLY 5.0 is Version 5.0s (25 October 2011).
The latest version of APSDS is 5.0e (3 August 2011).
The latest version of HIPAVE is 5.0n (2 August 2011).
CIRCLY, APSDS and HIPAVE Workshops - 2012
The Centre for Pavement Engineering Education (CPEE) will be presenting the following Short Courses/Workshops this year:
Mechanistic Pavement Design - CIRCLY
This one day course provides delegates with an understanding of the theoretical basis of mechanistic pavement design methods and is a hands-on course with each student having access to a PC. The course is offered as a single day for those who are well versed and practiced in pavement design, or who have completed any of the past CPEE two day Pavement Design courses, or for those who are attending the current Pavement Design – Principles & Practice 2 day course in 2012. Alternatively, limited places are available for Delegates to Register to undertake it as day 2 of the CPEE course Pavement Design- Advanced, provided they are well versed and practiced in pavement design, or have completed any of the CPEE two day Pavement Design courses.
The course provides an introduction to flexible
pavement design models using
CIRCLY
5.0 focusing on the
Austroads
Guide to Pavement Technology - Part 2: Pavement Structural
Design (AGPT02/10).
The workshop will also include an introduction to heavy duty
pavement design for container terminals and airports.
Heavy Duty Pavement Design Workshop (HIPAVE / APSDS) <<< to be scheduled for 2012 - Register your details below >>>
This one day course focuses on computer aided design of
heavy duty flexible pavements using
HIPAVE and
APSDS (Airport Pavement Structural Design System).
The emphasis is on pavements subjected to the extremely heavy
wheel loads associated with airports and freight handling vehicles in
industrial facilities, such as intermodal container terminals.
This is a hands-on workshop with each student having their own
PC.
Pavement Design - Advanced
This intensive two day short course, which incorporates the Mechanistic Pavement Design – CIRCLY course (the second day), is ideal for engineers and engineering technologists working for federal, state, or local authorities, consultants and contractors who already have a sound awareness and understanding of the basic principles & practices of pavement design.
This 2 day course provides participants with knowledge of the principles of flexible pavement design, as per the current Austroads Guide to Pavement Technology - Part 2: Pavement Structural Design (AGPT02/10).
These courses are recognized by Engineers Australia for Continuing Professional Development (CPD) purposes.
2012 Workshop Calendar
Click here to see the 2012 Calendar.
Note: The CIRCLY and Heavy Duty Pavement Design Workshops are "hands-on" experiences with each student having their own PC - so 16 places only.
Additional Pavement related short courses are offered through The Australian Asphalt Pavement Association's (AAPA) Training Centre. A full list of the courses on offer can be found on the AAPA website.
Register your details below if you are interested in attending a Workshop and would like to be notified when further details are available.
Click here to register your details if you are interested in
attending a Workshop and would like to be notified when further
details are available.
Registration forms and other details will be available approximately
4 weeks prior to each course.
2010 Austroads Pavement Structural Design Guide Released
Austroads Guide to Pavement Technology - Part 2: Pavement Structural Design (AGPT02/10) was released in February 2010. This version has only minor changes from the previous version: AGPT02/08 : Guide to Pavement Technology - Part 2: Pavement Structural Design that was released in July 2008.
The main changes from the 2004 Guide [Pavement Design. A Guide to the Structural Design of Road Pavements (AP-G17/04)] are as follows:
- reformatted to form part of the comprehensive Guide to Pavement Technology series, including editorial review to address errors
- now includes design of lightly trafficked pavements previously published in Pavement Design for Light Traffic: A Supplement to Austroads Pavement Design Guide (AP-T36-06)
- includes procedures for evaluation of pavement damage due to specialised vehicles
- change of abbreviations for Standard Axles of loadings to SAR5, SAR7 and SAR12
- minor amendment to equation 6.7, speed adjustment for determining asphalt moduli
2011 Austroads Pavement Evaluation and Treatment Design Guide Released
AGPT05-11 : Guide to Pavement Technology - Part 5: Pavement Evaluation and Treatment Design was released in December 2011.
This publication is an update of AGPT05-09. It contains an inclusion of thickness design for stabilisation treatments, and has also been reformatted which includes realigning the contents page and the lay out to make the information more accessible for the reader.
Support for Windows Vista
Mincad Systems is pleased to announce our commitment to Windows Vista by supporting this new operating system. Windows Vista is a step forward toward increasing the security of Windows.
The following packages fully support Windows Vista:
The latest version of CIRCLY 5.0 is Version 5.0s (25 October 2011).
The latest version of APSDS is 5.0e (3 August 2011).
The latest version of HIPAVE is 5.0n (2 August 2011).
New software for intermodal container terminals
HIPAVE (Heavy Industrial PAVEment design) is for the mechanistic analysis and design of flexible pavements subjected to the extremely heavy wheel loads associated with freight handling vehicles in industrial facilities, in particular, intermodal container terminals. It is designed to conveniently model each combination of vehicle model and container load and to combine the damage using the Cumulative Damage Factor concept.
click here for further details.
We now have a Support Knowledge Base
Click here to browse or search our Support Knowledge Base.
A Powerful Tool for Pavement Cost Optimization
Automatically generated plot: Total Cost vs. Layer 2 Thickness
The CIRCLY 5 Cost Analysis feature lets you fine tune layer thicknesses to minimize construction cost. You can specify unit costs for each material.
CIRCLY 5 has a Parametric Analysis feature that will loop through a range of thicknesses for one or two layers, while simultaneously designing the thickness of another layer.
Click here for a Preview of the Cost Analysis feature.
Recorded Demonstrations
We now have a number of online recorded demonstrations of the new CIRCLY 5.0 features.
Sample Pavement Design Report (by Graham Foley)
As a service to our clients we are making available a Sample Pavement Design Report written by a specialist pavement engineer, Graham Foley. This report is an example of using the general mechanistic procedure to refine an existing pavement design to provide an alternative pavement design. It will be of use to both experienced and less-experienced pavement designers as how to approach and document a mechanistic design.
Click here to download the Sample Pavement Design Report (the file you need is "Sample_Pavement_Design_Report.pdf").
Paper on Current Issues for Mechanistic Pavement Design
- Wardle, L.J., Youdale, G. and Rodway, B. (2003). Current Issues For Mechanistic Pavement Design. in 21st ARRB and 11th REAAA Conference, Cairns, Australia, 18 - 23 May, 2003, Session S32, ARRB Transport Research.
This paper discusses four issues currently faced by designers using mechanistic software such as CIRCLY and APSDS to produce pavement designs that are consistent and appropriate. The issues are:
- the choice of appropriate failure criteria
- the treatment of vehicle wander
- negative vertical subgrade strains that can lead to anomalous design results for some pavement geometries
- design of asphalt-surfaced granular pavements,
The first three issues primarily impact the design of heavy duty pavements. The last issue relates to proposed changes to the Austroads (1992) Pavement Design Guide as published in the 2001 Draft Guide (Austroads, 2001).
 Acrobat
version |
 Web
page version |
CIRCLY receives high rating in European Pavement Design Study
Research by the European Economic Community has identified that a standardised European pavement design and maintenance strategy will lead to savings of billions of dollars in construction and maintenance costs. The first step in this standardisation process, the AMADEUS (Advanced Models for Analytical Design of European Pavement Structures) Project, a coordinated European Road Research Program formally commenced in January 1998.The AMADEUS Project involved a team of 15 national partners (Great Britain, Germany, The Netherlands, Belgium, Portugal, Denmark, Austria, Spain, Greece, Sweden, Finland, Switzerland, Iceland, Slovenia, Hungary) and included national highway research institutions, universities and other road research organisations. The project reviewed current pavement design methods and software. CIRCLY was one of the few packages that was capable of being used in all the phases of the project and achieved good ratings in all categories.
Click here to download the 178 page Final Report.
U.S. Airport Pavement Researchers to use APSDS and CIRCLY
APSDS and CIRCLY have just been licenced to the U.S. Center of Excellence for Airport Pavement Research at the University of Illinois (Urbana-Champaign). The Centre is supported by the Federal Aviation Administration, with the aim of developing pavement design for next generation aircraft. APSDS and CIRCLY will be used to analyse results from the US Airport Pavement Testing Facility, the newly commissioned accelerated full-scale pavement loading machine.CIRCLY chosen by U.S. Researchers for modelling Unbound Aggregates
The International Center for Aggregates Research (ICAR) is the voice of the U.S. aggregates industry in the research community.
Under the direction of Professor Robert Lytton, the ICAR team has developed models that explain the anisotropic properties of the unbound aggregate system. This work demonstrates the stress sensitivity and anisotropic nature of Poisson ’s ratio and how critically important it is to measure the anisotropic and stress-sensitive response of Poisson ’s ratio properly. The team has recently adopted CIRCLY as the basis for implementing the new aggregate model in a pavement design framework.
Important Warning- Heavy Duty Pavements
It has been acknowledged that performance data developed for highway pavements (e. g. Austroads) is not generally appropriate for heavy loadings such as airports and container terminals. Use of such models can lead to grossly under-designed pavements. For further details see Rodway and Wardle (1998).
A few clicks will keep your copy of CIRCLY up to date.
CIRCLY 5 lets you to check for a newer version on our website just by clicking Help/From the Web/Check for Updates. To download the latest update click here.
