Value added sustainable use of recycled and secondary aggregates in concrete

The paper is based on research projects (including several demonstration projects) undertaken by the authors, at the University of Dundee, UK, since 1996, in collaboration with Government Departments, Local Authorities and various sectors of the construction industry, to the tune of several million British sterling pounds, and actively involving hundreds of stakeholders (major, medium and small enterprises). This research is helping to create a gradual acceptance of recycled and secondary aggregates (RSA) for their sustainable use in concrete and concrete products, in the UK construction industry ( and most likely in other countries as well). The emergence of the 'appropriate use of materials' and 'performancebased standards/specifications' concepts are considered central to the development of RSA as a valuable and sustainable resource. An international 'Network RSA in Construction' is being presently established.