Low carbon asphalt incorporating rubber from recycled tyres




Bolton Council


Tarmac Contracting

Location type

Residential Road


Oct 2020

The challenge

Bolton Council needed to resurface a residential road and wanted to reduce their environmental footprint across the works programme. Work needed to be completed in a day with minimal disruption for residents. Materials used needed to offer more sustainable performance and fast trafficking.

Our solution

Following consultation of the scheme requirements a Rubber Modified, Warm Mix SMA was agreed to be the best solution. Produced at lower temperatures, the warm mix asphalt reduces CO2 emissions by 10%. The rubber crumb delivers durability benefits and also helps to depose of waste materials, offering the potential to recycle about 500 tyres per kilometre of road, depending on layer thickness. 2484m2 of the existing carriageway was planed out to a depth of 35 mm and 200 tonnes of 10mm SMA Rubber Modified asphalt was laid. 

Results and benefits

By utilising Tarmac’s innovative warm mix and rubber modified asphalt the client received a durable, fit for purpose product which has the exact same performance as a traditional SMA bases material but with enhanced sustainability credentials, reduced CO2 emissions and longer lasting performance. The client and local residents were happy with the finished visual effect and friendly, professional workmanship. Work was completed on time with minimal disruption experienced by residents due to the fast installation and early trafficking product attributes. Enhanced environmental credentials for council and residents were achieved using a more sustainable material which incorporates waste recycled tyres and warm mix technology. The first time the material has been laid the Bolton.

Learn more about Rubber Modified Asphalt Download case study

Additional info

Sustainable solutions

Rubber Modified Asphalt is just one of the many sustainable solutions from Tarmac. The development of Rubber Modified Asphalt is part of our commitment to the circular economy, with the business recycling 8.7 million tonnes of waste from other industries every year.

Lower carbon emissions

The typical carbon footprint of Tarmac’s rubber modified SMA solution will be around 8% lower than the equivalent conventional SMA.


Tarmac Rubber Modified Asphalt incorporates up to 500 waste tyres for every kilometre of highway surfaced.

Asphalt contact

Rubber Modified Asphalt case studies

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  • ULTICOLOUR Long lasting, coloured asphalt bus lane