Brahim Safi currently is Professor at University M'Hamed Bougara -Boumerdes. He is Head of research team; Eco-Materials, Recycling and Recovery of Wastes in materials, at Research Unit; Materials, Processes and Environment. The scientific interests: Wastes recycling in concrete materials and Materials characterization. Construction and Building Materials, Mechanical behavior of Materials, Rheology of Fluids. Editors of two Book of Proceedings SpringerNature 1. Book of Proceedings of the 4th International Symposium on Materials and Sustainable Development: Vol 2 Waste Recycling and Environment; ISBN 978-3-030-43211-9; 2. Book of Proceedings of the Third International Symposium on Materials and Sustainable Development; ISBN 978-3-319-89707-3