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