SAMI SAMIGreen on Brisbane roads: specification and design notes for pavement engineers
Reviewed by Joe Ashwell
First reported on Roads & Infrastructure (AU)
30 Second Briefing
Brisbane City Council has replaced 100 per cent of its conventional A15E asphalt binder with SAMIGreen across its network, aiming to cut embodied carbon while maintaining performance under heavy urban traffic. The council, which already holds certified carbon-neutral status through offsets, is shifting focus to direct emissions reductions in pavement materials as part of its ‘Clean, Green City’ strategy. For pavement designers and asset managers, the move signals growing acceptance of alternative binders that can drop into existing A15E specifications without major changes to mix design or construction practice.
Technical Brief
- Wider implication: large urban road owners can trial alternative binders at network scale without redesigning pavements.
Our Take
Brisbane City Council’s 100 per cent substitution of conventional A15E with SAMIGreen in Queensland mirrors earlier use of the same binder on Victoria’s Level Crossing Removal Program, signalling that the product is moving from trial status to multi-jurisdictional network deployment.
With several recent pieces in our database linking SAMI and SAMIGreen to COLAS Australia Group and national spray seal pilots, Brisbane’s adoption positions the council to tap into a growing, shared technical ecosystem around performance-based, lower‑emission binders rather than relying on bespoke local specifications.
The opening of the SAMI Technical Centre suggests Brisbane City Council will have access to more rigorous performance testing and lifecycle data for SAMIGreen, which can help justify whole‑of‑life cost and emissions claims when competing for state or federal sustainability‑linked funding in Australia.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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