Crumb rubber in roads
The Benefits of Surfacing Roads with Tyre Derived Crumb Rubber - Findings and Facts
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Tyre derived crumb rubber in road surfacing applications in Australia - Market Overview
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National Specifications for Crumb Rubber Modified (CRM) Asphalt
In 2019 Tyre Stewardship Australia (TSA) and the Australian Asphalt Pavement Association (AAPA) introduced new national specifications for Crumbed Rubber Modified (CRM) asphalt, published in June 2019, for open graded asphalt (OGA) and gap graded asphalt (GGA) mix designs.
The pilot specification set out the requirements for CRM OGA surface layers with a nominal maximum aggregate size of 10 mm and 14 mm. The specification also includes requirements for CRM GGA mixes with a nominal maximum aggregate size of 14 mm and 20 mm.
Crumb Rubber Asphalt Demonstration Trials - High Traffic Roads
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The crumb rubber asphalt demonstration trial was a collaborative effort organised by Tyre Stewardship Australia (TSA), the Department of Transport (DoT) Victoria, and the Australian Road Research Board (ARRB). The project was undertaken with the cooperation of local asphalt manufacturers at East Boundary Road, East Bentleigh, Victoria.
The initial results showed an improvement in condition for all measures with the new surface in place, and the ongoing monitoring has observed good performance over the two-year monitoring period of the trial.
A study of the environmental emissions during the asphalt paving was undertaken to measure the potential fuming exposure of crumb rubber asphalts, and to provide a comparison to control mixes. The analysis found no significant fuming exposure to volatile organic compounds. Detected values of total suspended solids, bitumen fumes, and polycyclic aromatic hydrocarbons were below recommended guidelines, and were lower for the crumb rubber asphalts compared to the control asphalts.
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