AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options Sustainability Sustainability - issues & - issues & options options Rob Vos Queensland Executive
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
SustainabilitySustainability- issues & options- issues & options
Rob VosQueensland Executive
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
Sustainability and management Sustainability and management
www.aapa.asn.au
“If you don’t measure it you can’t manage it”• Are we measuring enough of what’s important
o Safety impacts – skid resistance, geometrics, eventso Pavement – what’s there, how is it performing?
• Local materials perform differently• Understand and test pavement strengths• Promote innovative greener / safer options
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options www.aapa.asn.au
Adequate Adequate funding is a funding is a
sustainability sustainability requirementrequirement
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
Sustainability and road funding levelsSustainability and road funding levels
www.aapa.asn.au
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
Including all the costsIncluding all the costs
www.aapa.asn.au
• Overall costs of road transport – who carries the biggest load?
• Smooth roads reduce fuel consumption
Users carry 95% of costs>7% saving in costs
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
Measuring & managingMeasuring & managing
www.aapa.asn.au
• Measuring “carbon”o Collaborative efforts of government & industryo Firm opportunities to use sustainable products
• Energy used in asphalt manufacture• Road surfacing vs road construction – carbon
generation• Carbon footprint calculators
RTA Greenhouse gas inventory 2000 - 2001
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options www.aapa.asn.au
Embodied energy & COEmbodied energy & CO22
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
Material scarcityMaterial scarcity
www.aapa.asn.au
• Scarcity considerations for materials
• Peak oil myth or message?• Human Skills
DETAIL ON SOME PRODUCTS Availability 15 to 20 years Green AlternatesQ1 Quarry products – road base OK, limits in urban areas No – cheapest optionQ2 Quarry products – concrete stone OK, limits in urban areas No – cheapest optionQ3 Quarry products – asphalt stone OK, limits in urban areas No – cheapest optionQ4 Quarry products – surfacings As above but high PAFV Manufactured & slagC1 Cementitious – lime Capacity limitations Imports? Fly ashC2 Cementitious – cement OK, some capacity limits ImportsC3 Cementitious - fly ash Capacity & quality limitsB1 Binders – bitumen OK, high import capacity Research level only, plant based, Tars –
economic, not greenB2 Binders – polymer modified Production capacity limits Crumb rubber - wasteB3 Binders – bitumen emulsions Production availability & limits No B4 Binders – cutback bitumen OK, no known limits, JetA1 EmulsionsF1 Fuels – diesel OK, imports vs limits LNGF2 Fuels – petrol OK, imports vs limits Ethanol & LPGF3 Fuels – kerosene OK, no known limits, JetA1 NoF4 Fuels – LPG Limited by distribution NoF5 Fuels – LNG Limited by facilities NoF6 Fuels – fuel oil OK, coal dust alternate LNG, LPG
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
Skill scarcitySkill scarcity
www.aapa.asn.au
• Construction’s boom & bust cycle• RIP - good demand smoothing & cost reducing• Are not locally sufficient in skills nor Australia• New “green skills” need to be grown
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
Improving performance and Improving performance and sustainabilitysustainability
www.aapa.asn.au
• Performance improvements
• Flexible pavements solutions available – now
• Flexible pavement solutions – on the horizon
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
Perpetual pavementsPerpetual pavements
• Never exceed maximum tensile strength• Top down cracking only failure mechanism• Replace wearing
course periodically• Manage by pavement
deflections• Very long life• Ownership simplified• Materials saved
www.aapa.asn.au
40 – 75 mm SMA, OGA100to
150mm
75 to 100 mm
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
Flexible pavements solutions Flexible pavements solutions available – nowavailable – now
www.aapa.asn.au
• Perpetual pavements• Recycled asphalt pavements (RAP)• Warm mix asphalt – process change on DGA• Emulsion based primes, primer seal & seals• Use of waste material – tyres, glass & fly ash• Bitumen stabilised materials – foamed asphalt• Protection of scarce road surfacing gravel• Modified binders for temperature risk• Social responsibility – lower odour binders
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
Warm Mix AsphaltWarm Mix Asphalt
www.aapa.asn.au
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
Use of waste material – crumb rubberUse of waste material – crumb rubber
www.aapa.asn.au
• Motor car & truck tyres a land fill problem• Unhealthy in stockpiles – flies, mosquitoes . .• Can be shredded forming an elastomeric modifier• Concerns:
o Fumes with possible health impacts at 200°C tempso Limits to availability o Transport/storage stability variable
• “Green”, but health issues unclear & need evaluation . . .
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
Modified binders for temperature riskModified binders for temperature risk
www.aapa.asn.au
Usage Name Softening Point Range ⁰C
Observation
Seal grade bitumen CL170 46 - 52 Lab results
Seal grade PMB low stress S0.3B 48 - 56 2 to 4 ⁰C improvement
Seal grade PMB high stress S4.5S 82 - 100 36 to 48 ⁰C improvement
Seal grade Crumb Rubber S15RF 55 - 65 9 to 13 ⁰C improvement
Asphalt grade bitumen CL320 48 - 54 Lab results
Asphalt grade PMB low stress A0.6S 65 - 95 17 to 41 ⁰C improvement
Asphalt grade PMB high stress A5S 82 - 105 34 to 51 ⁰C improvement
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
Flexible pavement solutions Flexible pavement solutions – on the horizon– on the horizon
www.aapa.asn.au
• Carbon Capture in bitumen
production
• Putting waste products to use
• Bitumen substitutes
• Energy from asphalt
• Active asphalt
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
VegecolVegecol
AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options
OverviewOverview
• Managing our C02 & sustainability issues requires measurement and relative assessments of our impact – road users too
• Opportunities exist to promote a more sustainable flexible pavement sector
• Innovation and new approaches exist and should be being implemented now
• Time to open up to allow progress into more sustainable outcomes
www.aapa.asn.au