The concrete industry consumes thirty billion tons of aggregate annually, almost all from non-renewable natural sources. Demolition produces a growing amount of materials which are legally usable and readily available. If not used locally they must be transported and landfilled. Also, demolition generally takes place close to new construction sites: recycling promotes shorter transportation distances, a must for improving the overall environmental footprint of the construction world.
This book encompasses all aspects of this current trend:
- How recycled aggregates are obtained and their properties.
- Improving their quality through phase selection or separation.
- Incorporating concrete from demolition into the cement production process and the properties of the product obtained.
- What are the properties of concrete incorporating recycled concrete aggregates at various replacement levels, throughout the lifecycle of the material, from the fresh state to the long-term, including durability and fire.
- How recycled concrete can be optimised for various uses.
- How this new structural material can be managed in reinforced concrete construction.
- Solid experience from a series of experimental sites, and drawing on the Recybéton project, which lasted more than 5 years and gathered about 50 partners (from both academia and industry).
- Specific issues in recycled concrete quality control.
- National practices in the most advanced countries, and the main national and European standards.
- Achieving a sustainable process.
François de Larrard is Scientific Director of the R&D centre of the LafargeHolcim group and Scientific Director of the French national project Recybéton. He formerly spent almost thirty years at IFSTTAR (formerly LCPC). He has been granted both the Robert l'Hermite medal and the G.H. Tattersall award by RILEM, and is author of two books, including Concrete Mixture-Proportioning which is also published by Taylor & Francis.
Introduction (F. de Larrard/H. Colina). Recycled aggregates (S. Decreuse). Binder incorporating recycled concrete fraction (L. Izoret). Recycled concrete from production to hardening stages (E. Garcia-Diaz). Properties of hardened recycled concrete (P. Rougeau). Mix-design of recycled concrete (T. Sedran). Reinforced recycled concrete (B. Fouré). Experimental construction sites (P. Dantec). Sustainability of concrete recycling (A. Feraille). Implementation of concrete recycling (W. Pillard). Conclusion: concrete towards the circular economy (F. de Larrard/H. Colina).