Jorge de Brito is a full professor of civil engineering in the Department of Civil Engineering, Architecture and Georesources, Instituto Superior Técnico, University ofLisbon. His main research topic is sustainable construction, particularly on the use of recycled aggregates in concrete and mortars. He has participated in 20 competitively financed research projects (four as the principal investigator) and supervised 20 PhD and 150 MSc theses. He is the author of 3 previous books, 20 book chapters, 250 journal and 450 conference papers. He is the editor-in-chief of the Journal of Building Engineering, an associate editor of the European Journal of Environmental and Civil Engineering, a member of the editorial boards of 15 other international journals and a member of the CIB, FIB, RILEM, IABMAS and IABSE organisations. Francisco Agrela is an Assistant Professor of Civil Engineering at the University of Cordoba, Spain. He received his PhD in 2003 from the University of Cordoba. He is the author of over 40 research articles in peer-reviewed journals. He has published a chapter in the Handbook of Recycled Concrete and Demolition Waste (Woodhead). He collaborates with several journals as reviewer, including Construction and Building Materials (Elsevier), Waste Management (Elsevier), Materials and Design (Elsevier), Resources, Conservation and Recycling (Elsevier). He belongs to the RAC committee of RILEM and AFN-20 of TRB. He has visited and collaborated with several Universities such as the TU Delft, University Polytechnic of Hong Kong, University of Granada, and IST of Lisbon.