Nicolas Roussel, director of the laboratory CPDM at Gustave Eiffel University in France. He is currently the chairman of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM). He received his doctor degree in civil engineering from INSA Rennes in 2001. He has devoted his career to the study of rheology of cement-based materials, and accumulated over 150 SCI papers with more than 10,000 citations. He is the honorary Editor-in-Chief of RILEM Technical Letters, the editorial board member of Cement and Concrete Research and Materials and Structures. He was awarded the RILEM Robert L Hermite Medal in 2007. He was the chairman of RILEM Technical Advisory Committee and the RILEM Technical Committee on digital fabrication with cement-based materials.