aapa q tmr senior management meeting 23 june 2010 – sustainability - issues & options...

AAPA Q TMR Senior Management Meeting 23 June 2010 – Sustainability - issues & options

SustainabilitySustainability- issues & options- issues & options

Rob VosQueensland Executive


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


Sustainability and road funding levelsSustainability and road funding levels

www.aapa.asn.au


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


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


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


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


Improving performance and Improving performance and sustainabilitysustainability

www.aapa.asn.au

• Performance improvements

• Flexible pavements solutions available – now

• Flexible pavement solutions – on the horizon


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


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


Warm Mix AsphaltWarm Mix Asphalt

www.aapa.asn.au


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 . . .


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


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


VegecolVegecol


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

aapa q tmr senior management meeting 23 june 2010 – sustainability - issues & options...

Documents