Heath Curnow CEO: STABIL-LIME GROUP Vice President: AustStab
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Transcript of Heath Curnow CEO: STABIL-LIME GROUP Vice President: AustStab
IPWEA Meeting3, 8 15 May 2012
Heath CurnowCEO: STABIL-LIME GROUP
Vice President: AustStab
Topics covered over the next 10 min Road Recycling for Sustainability Advantages & Application of In-Situ Stabilisation
to Improve Engineering Properties. Consider Whole of Life Costs to Determine
whether or not to Stabilise The role of the association and what we can do
to help you day to day
Pavement Recycling by In Situ Stabilisation
Process of improving pavement material properties by in situ mixing in accordance with a mix design.
According to Sustainability Victoria & the Institute of Engineers, Sustainability refers to:EconomicEnvironmentalSocial
Sustainable Advantages of Pavement Recycling Economic Sustainability:
Cost effective to treat saturated/soft materials rather than the cost to excavate and replace.
Design & Construct efficiency by increasing the strength of the lower pavement layers and saving on the thickness of more expensive upper pavement layers.
Environmental Sustainability: Recycling reduces dependence on limited quarry
resources by reusing worn out pavement materials or improving subgrade properties.
Stabilising unsealed roads increases durability and reduces re-grading & re-sheeting frequency.
Social Sustainability:Construction expediency & reducing traffic
movements significantly reduces disruption to local traffic during construction.
Tailor mix design to improve specific material properties:Plasticity (PI) & PermeabilityStrength & Moisture Content
.
Improve material grading by pulverising during mixing of Binders..
Correct shape & moisture condition to ensure OMC at compaction.
Stabilisation can be used on new works, rehabilitation works and on unsealed pavements
Savings can be made in the sub grade, sub base or base material using materials already on site DOTARS study on unsealed roads, completed in 2010 showed:
Stabilised Base Granular overlay
Initial cost/km $17000 $13000
Life before replacement 12 years 8 years
Resultant cost pa $1,400 $1,600
Minor maintenance schedule
Once per year 2 – 3 times per year
Cost per maintenance/km $1,000 $1,000
Cost per annum $1,000 $2,500
Total Cost $2,400 $4,100
Whole of Life Costs1. Asphalt patch work quilt is an expensive surface band aid
typically with a max. 2 year life.2. Pavement continues to exponentially deteriorate as do costs to
rehabilitate.3. Consider sooner option to join patches & recycle with 30 year
design life & minimal maintenance.
AustStab is able to provide you with information and tools
Members register
Publications- The guide- Work Tips- Published articles
Information on design and specifications
Training- Upcoming TrainingCPEE and AustStab CourseMelbourne October 2012
Frequently asked Questions
Contractor Register
AustStab in Victoria is wanting to engage with local government, state government, contractors and consultants – You!
Stabilisation and
recycling increases
Attend CPEE course