1. New products from industrial by-products Sustainable use of natural resources (7th fundamental requirement of the European Construction Regulation) Production methods for new products from industrial by-products Technical properties of new products from industrial by-products Basic characterisation and quality control Long-term durability Environmental evaluation of new products from industrial by-products Development/harmonisation/standardisation of leaching tests Measurement of modelling of long-term environmental impacts Achievement of “End of waste” status Sustainable use of construction materials in marine environment Case studies 2. Closing the loop for construction materials Eco-efficent projects/public works Design for reuse Reuse of whole building components Recycling/reuse of construction & demolition wastes Industrial symbiosis Life cycle assessment Social implications and added value for the community Policy, regulations and barriers to resource efficiency Case studies