Long-Life Pavement Surfacing
Background
This is the third and last phase of project Long Life Pavements. The overall objective of the project is to develop wearing courses that can last more than 20 years.

Phase I of the study analysed the prospects for the development of an economic basis of longer-life wearing-courses for heavily-trafficked roads. A number of promising pavement materials were identified warranting further investigation. Phase 1 of the project concluded that such wearing courses would be economically viable for roads with a AADT of 80 000 vehicles or more, providing their construction costs were less than 3 times those of traditional wearing courses.

Phase II of the project coordinated testing by national testing laboratories to assess the durability of the wearing courses. This involved small-scale testing (laboratory testing and accelerated load testing) of the most promising pavement materials: epoxy asphalt and high performance cementitious materials.

Epoxy Asphalt has already demonstrated its ability to deliver a 40 year service life as a road surfacing on steel bridge decks. Testing undertaken in Phase 2 confirmed its potential for long service life on underlying road pavements, which are more flexible than stiff bridge decking.

HPCM is a new material that was developed under Phase 2 of the project. It consists of a layer of ultra-high performance, steel fibre-reinforced, fine mortar in which hard, polish resistant aggregate particles are embedded forming a 10 mm composite layer. The strength of this material was demonstrated during Phase 2.

This Phase 3 study consists of full scale field trials of epoxy asphalt and high cementitious materials.
Objective of the Phase 3 Project
Phase 2 recommended to undertake field trials for both materials to confirm the performance demonstrated in laboratory testings. The goals of the trials are to:
  • Confirm the performance of the two materials under real traffic conditions.
  • Develop construction methods.
  • Improve cost estimates.
  • Optimise material mixes.
  • Gain experience (contractors' experience)
Participants
The project is chaired by François de Larrard (LCPC, France)

The following countries participate in the study: Belgium, Denmark, France, Germany, Israel, Hungary, New Zealand, Norway, South Africa, United Kingdom, United States.
Calendar
The project was launched in 2009. Field tests started in 2009 (New Zealand) and 2010 (France). Further sites are planned in 2011. Monitoring will be done until 2012-2013. A final report is expected in 2012-2013.
Related Documents
The project was launched in 2009. Field tests started in 2009 (New Zealand) and 2010 (France). Further sites are planned in 2011. Monitoring will be done until 2012-2013. A final report is expected in 2012-2013.
Related Events