from this project is likely to generate significant interest from both local and national highways authorities and their supply chain, given it proves the efficiency of road building can be enhanced without compromising performance.


Whilst the lower temperature asphalt technology is available today, the market shift to adopt it will be gradual, as companies need to invest significant capital in installing equipment; thus the energy savings from producing LTA will accrue over time. As more customers adopt lower temperature materials, and more plants can be switched over, this is when the real benefits will be seen, both in terms of reducing the cost of these materials and reducing carbon. The more it is used, the greater the impact as this is when the benefits could be realised. Low temperature technology offers many benefits, both in terms of sustainability and saving from project efficiencies. For example they can help to reduce the duration of works on road schemes with associated potential safety benefits for both the travelling public and the workforce. This may be particularly relevant on large-scale resurfacing of


1.


This calculation assumes a gradual increase in uptake of low temperature asphalt up to 21% market replacement in volume after 10 years. The calculations do not reflect inflation on fuel costs over the 10 years period. The calculation is based on the data generated from the site trial installed within the project. It also


heavily congested schemes where there is a significant period of time involved waiting for materials to reach the appropriate trafficking temperature. Doug Sinclair, Major


Projects Portfolio Office Director, Highways Agency, said: “Carbon reduction is all about innovation – you only get different results by doing things differently – it’s that simple.” Jim Christie, Business Area Director


at Nynas UK, added: “Nynas has been developing low temperature technologies with its customers in Europe for over 20 years. We are proud to have continued our tradition by working with Lafarge Tarmac on this very successful and pioneering project.” The report follows a recent announcement by transport minister Robert Goodwill that £1.9bn will be invested in British roads in 2014; providing an economic boost of more than £18.8bn, as well as creating almost 10,000 jobs. Efficiency is central to the Department for Transport’s ‘Action for Roads’ policy, which


does not account for capital expenditure required to install equipment to manufacture LTA, and additional materials required for some LTA mixes.


2. MPA Sustainable Development Report 2012.


3.


TRL Aspect footprint calculator CO2 footprint of bitumen 190kg CO2/tonne;


PUBLIC SECTOR SUSTAINABILITY • VOLUME 4 ISSUE 2 13


is manufactured and laid. The carbon footprint for asphalt manufacture is estimated at 24 kg CO2


intends to generate efficiency savings of £2.6bn over the next 10 years. Each year throughout the UK approximately 22 million tonnes of asphalt2


/tonne which,


when combined with the embedded carbon in the aggregate and the bitumen, rises to 40 kg/CO2


/tonne3 /year4 . The total


UK carbon footprint associated with the asphalt industry is estimated at 786,000 tonnes of CO2


which is the


equivalent to 5,000 km driven by a million average family cars5


.


www.lafargetarmac.com www.carbontrust.com www.bis.gov.uk/rgf


1.3 million tonnes bitumen; 20.7 tonnes aggregate.


4. 5.


Carbon Trust, Industrial Energy Efficiency Accelerator, Guide to the asphalt sector


Assuming the average car emits 150g/ CO2/km


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