Road recycling: do we need a ‘Big Data’ moment?
By David Smith, development director, FM Conway
Big Data is a term that has entered the lexicon. It’s used to describe the huge volumes of data
generated by traditional business activities and from new sources such as social media. This data is
vast, unstructured and difficult to analyse. Companies use sophisticated software to identify patterns,
trends and insights which can help them to tailor their services and products to better meet the needs
You won’t be too surprised to learn that Big Data hasn’t got anything to do with highways or road
recycling. But I do believe there’s scope for our industry, if it is serious about resource efficiency and
recycling asphalt, to have its very own Big Data moment. Essentially, this would see the sector
embrace a new approach to recycling; compiling and analysing data on the composition of our
existing roads to develop detailed plans with our customers which allow us to better rework this
A key benefit of asphalt is that it can be 100 % recycled as asphalt, with the aggregate and binder
fully re-used. Asphalt recycling remains a largely overlooked opportunity - the UK has a more mature
road network and as a rough estimate there could two billion tonnes of asphalt which could be
Asphalt recycling is important for both environmental and financial considerations. Firstly, recycling
this material is the best way of reducing the carbon footprint of roads - embodied carbon in materials
constitutes around 40% of the carbon footprint of road construction and maintenance. Secondly,
recycling allows us to reduce our reliance on finite primary aggregates. Thirdly, by recycling asphalt
we can reduce the volume of bitumen, the binder which remains subject to price volatility and can
account for around a third of the total cost of constructing a new road.
Over the last decade our industry has undoubtedly taken great strides to normalise road recycling, but
our approach is often too sporadic. We need to get to the point where a local authority and its term
maintenance contractor work in partnership to develop an annual plan for road recycling. This should
set out on a street by street basis, the volume and quality of asphalt that will be recycled and where it
will be stored before it can be re-used.
Developing this approach will require greater analysis of the composition of existing roads by using
coring techniques. The aim should be to determine the quality, quantity, value and best future use of
We need to be armed with this information because not all road planings are the same. They differ in
quality and value because they have different original properties – some have high Polished Stone
Value (PSV) aggregates, others are made of limestone or hardstone.
The best value of materials should also be determined by identifying the additional cost of retaining
the original properties of asphalt planings. This will reflect the costs to segregate the planings,
transport the materials to a discrete store and the value of the recycled materials versus the cost to
store it before it can be re-used on the network.
Many councils already have high targets for the re-use of materials. An annual plan for road recycling
would allow them to better benchmark targets and set out the actual scope to cut carbon and recycle
In our future maintenance of roads we must plan the systematic reworking of asphalt to both reduce
the need for finite aggregates, cut embodied carbon and also to extend the life of the asset as far as
possible. This calls for better planning by contractors and councils and a greater understanding of the
quality, composition of planings that can be recycled on a street by street basis. The road to better
recycling cal s for the highways sector’s very own ‘Big Data’ moment.
Welcome to our second Newsletter designed to keep our renal people informed via handy hints and suggestions plus current policies being implemented by Oxford Radcliffe Hospitals NHS Trust. NHS FUNDED TRANSPORT Please can all patients who currently make use of hospital funded transport use the service in an appropriate way. It is NOT a personal taxi service and is provided for the ben
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