WA freeway to use C&D waste as road base

Recycled construction and demolition (C&D) waste will be trialled as road base for use on the Kwinana Freeway widening project, WA.

The project is the first major road in WA that will use recycled materials as road base to boost the state’s recycling performance.

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The trial will take place between Russell Road and Roe Highway and will use about 25,000 tonnes of recycled C&D product.

Main Roads WA will work with the Waste Authority and the Department of Water and Environment Regulation (DWER) for the trial.

A new product testing scheme will aim to help C&D recyclers with the costs associated with meeting the appropriate specifications are free of contaminants and asbestos. An independent audit testing scheme aims to provide additional support.

The pilot aims to improve confidence in using recycled C&D products and supporting the state’s waste diversion target. Its findings will be used to establish the WA Government’s Road to Reuse program.

WA Environment Minister Stephen Dawson said the demonstration project is the beginning of a new practice for the government.

“It will demonstrate to local governments and industry that recycled content is usable and value for money, redressing the concerns from many years ago that effectively stopped any reuse of valuable construction and demolition materials,” Mr Dawson says.

“This partnership between DWER, the Waste Authority and Main Roads is a huge step forward for the reduction of construction and demolition waste in Western Australia.

“By using recycled construction and demolition products in projects across the state, we can help meet our landfill diversion targets and focus on recycling materials.”

WA Transport Minister Rita Saffioti said the interagency partnership is key to ensuring the ongoing use of recycled material in WA.

“Roads to Reuse establishes a strict testing regime to reduce the risk of contaminants to below allowable limits – protecting people and the environment,” she said.

Main Roads WA boosts funding for roadside litter program

A litter prevention program will receive a $400,000 funding boost after it successfully reduced roadside litter by around 70 per cent in some roadside locations.

Main Roads WA will contribute the funding towards extending Keep Australia Beautiful Council’s “Put your rubbish in the bin. WA naturally thanks you” campaign.

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The program installs anti-litter roadside signage, bin stickers, and provides 300,000 free car litter bags which are available from roadhouses along selected routes.

The program has been rolled out on the Forrest Highway, Great Eastern Highway and Brand Highway.

Funding from Main Roads WA will enable further enable the rollout of anti-litter signage on WA’s freeways and highways.

Sustainable car litter bags and posters will also be distributed to roadhouses to encourage road users to dispose of their rubbish correctly.

WA Transport Minister Rita Saffioti said Main Roads WA spends around $6 million each year to remove litter from roadsides, with proactive measures far more cost effective at tackling the issue.

“The National Litter Index indicates that roadsides are one of the most littered areas in WA,” she said.

“I am pleased that, through this campaign, we have been able to decrease the amount of litter at some locations by up to 70 per cent.”

WA Environment Minister Stephen Dawson said the successes of the campaign has resulted in a reduction of funding needed for roadside clean ups.

“This is about making motorists think twice before they litter and to take some pride in WA’s precious natural environment,” he said.

Millions of tyres could soon be used in Australia’s roads

New national specifications for Crumbed Rubber Modified (CRM) asphalt could see millions of waste tyres being used in Australia’s road infrastructure.

The Australian Asphalt Pavement Association (AAPA), Tyre Stewardship Australia (TSA), Main Roads Queensland, Main Roads WA, Sustainability Victoria and the Australian Road Research Board have worked together to develop and analyse research and development data to achieve cohesive national standards.

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The new national specifications could see nearly 10 per cent of the accessible feedstock for Australian tyre-derived crumb rubber used in domestic road manufacturing, which adds up to almost 4 million end-of-life tyres every year.

The document was published by the AAPA national technology and leadership committee to facilitate the construction of demonstration trials of CRM gap graded asphalt (GGA), and to promote the use of CRM open graded asphalt in Australia.

The crumb rubber binder technology is based on the technology used in the US, with the first demonstration section of CRM GGA in the Gold Coast placed in late June.

CRM Asphalt can offer better drainage, reduced noise, improved rut and crack resistance and reduced maintenance cycles.

Engineers and road contractors are now able to work within parameters of the new national specifications to take advantage of CRM asphalt and spray seal.

TSA Market Development Manager Liam O’Keefe said reaching a national standard has been a critical part of increasing the potential market for crumb rubber use in Australian roads.

“To fully realise this potential for that use we must continue to work with industry partners to ensure the delivery of better roads and better environmental outcomes for all,” Mr O’Keefe said.

“The important next phase of the task is ensuring that the new specifications are used. As utilisation of the new specifications grows, so too will the benefits to the end- of-life tyre industry.”

AAPA Director of Technology and Leadership Erik Denneman said this is a great outcome that has come from the close collaboration between industry and road agencies in Australia.

“For AAPA this initiative fits our objective of encouraging the efficient use of available resources and promoting the use of sustainable products,” Mr Denneman said.

The new national specifications can be found here.