Austroads: Transport Research and Trends
Government
The use of reclaimed asphalt pavement (RAP) in new asphalt mixes is a common practice in Australia and New Zealand due to its many benefits. RAP contents are typically about 10–20% but higher contents can be used, if the effect of the aged binders present in RAP is accounted for. Rejuvenators can be used to soften the hardened binders which are present in RAP, and are therefore considered an essential component for producing high-content RAP mixes.
Although Australian and New Zealand asphalt producers acknowledge the importance of rejuvenators (in particular when producing high RAP mixes), rejuvenators are not commonly used due to the lack of specifications/guidelines that can evaluate the potential performance of rejuvenators when used in RAP mixes. To address this issue, Austroads has developed a rejuvenator evaluation protocol. In this protocol, rejuvenators are evaluated as part of binder blends, and their short/long-term ageing resistance is assessed to ensure their performance at the production stage as well as during service in the long term.
This webinar with Young Choi, Robert Busuttil and Robert Urquhart presents the proposed protocol and its development work. The development work involved a literature review into international rejuvenator specifications and research studies, in particular those which investigated the effect of rejuvenator properties on the properties/ performance of asphalt binders and mixes.
The development work involved obtaining feedback from Austroads technical group members and international experts. These studies were conducted to ensure that the evaluation protocol is robust and practical.
The webinar also covers a plan for future validation studies which will ensure that the protocol is suitable for use in Australia and New Zealand.
Austroads Guide to Asset Management
Lean Construction: Responding to the Productivity Challenge Faced by the Construction Industry
Updated Guidance for the Design of New Pavement for Road Tunnels
Guide to Pavement Technology Part 4D: Stabilised Materials
A National Approach to Measuring Non-fatal Crash Outcomes
Road Risk Assessment, Case Studies and Engagement Guidance for Speed Management
Guide to Road Safety Part 6: Managing Road Safety Audits
Developing the Data to Support Heavy Vehicle Road Reforms
Long-term Pavement Performance Study
Passing Lanes: Safety and Performance
Improving Driver Licensing Programs for Indigenous Road Users and Transitioning Learnings to Other User Groups
Guidelines for the Provision of Heavy Vehicle Rest Area Facilities
Embedding Safe System in the Guide to Traffic Management
Level of Service Requirements for Freight on Rural Roads and Refinement of Heavy Vehicle Roughness Band Index
C-ITS Compliance Assessment Framework for Australia and New Zealand
Evaluation of the European C-ITS Platform including Threat, Vulnerability and Risk Analysis
Measuring and Reporting the Value of Road Maintenance and Renewal Works
Establishing Extended Hours Delivery Trials
Connected and Automated Vehicles Open Data
Suggested Good Practice for Road Tunnel Emergency Egress Signage
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