Initiatives in the field

An advanced environmental alternative

SEVE® is the new software for the road industry that customers can use to evaluate environmental alternatives when assessing bid proposals. This unusual approach has been highly successful:

  • Major construction groups, among which Colas has played a particularly active role, decided to merge their eco-comparison tools leading to the creation of SEVE®, which was subsequently provided free of charge to all companies in the sector.
  • The Minister in charge of the Environment and Public Works signed a charter with the industry granting advance accreditation to SEVE® for assessing bids for public sector contracts.
  • Numerous public sector customers now use SEVE® as a rigorous tool to judge bids on an equal footing in line with four key indicators: energy, greenhouse gases, savings on materials and bitumen recycling.

Shortly after SEVE® went live via the extranet in July 2010, Screg Île-de-France/Normandie responded to a major invitation to tender issued by Aéroports de Paris (ADP), which it won in September on the basis of an alternative presented using the software.

The subject was the rebuilding of 5,000m2 of exit taxiway at Orly airport dating from the 1960s. The highly technical asphalt alternative took into account environmental issues and allowed for the immediate reopening of the taxiway, thus avoiding the traditional concrete solution and its three week drying and hardening period:

  • Sub-base layer: cement-bound aggregates consisting of 92% crushed concrete from reclaiming Orly's old concrete taxiways
  • Base layer: warm asphalt or WMA (resulting in energy savings and greenhouse gas reductions) including 30% reclaimed asphalt pavement or RAP
  • Surface layer: WMA based on high-performance polymer bitumen

The results, which arise from the commitment to sustainable development shown by both ADP and Screg Il-de-France Normandie, equate to:

  • A reduction in greenhouse gases of more than 60% relative to initial plans
  • A reduction in energy consumption of more than 40%
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Philippe Pellevoisin