Proceedings of the 75th RILEM annual week 2021 : advances in sustainable construction materials and structures Supplementary cementitious materials Durability and Life Cycle Assessment in Urban and Marine Conditions Additive manufacturing of concrete in construction Structural Performance and Design Non Portland cements and Alkali activated cementitious materials and eco concrete Cultural Heritage Non destructive testing techniques Bituminous materials polymers timber bamboo recycling masonry etc. This volume gathers the latest advances innovations and applications in the field of sustainable construction materials and structures as presented by leading international researchers and engineers at the 75th RILEM Annual Week (75RW 2021) held in Merida Mexico on August 29 – September 3 2021. It covers topics such as supplementary cementitious materials durability and Life Cycle assessment in urban and marine conditions additive manufacturing of concrete in construction structural performance and design non Portland cements and Alkali activated cementitious materials and eco concrete cultural heritage non destructive testing techniques bituminous materials and construction materials (polymers timber bamboo recycling and masonry). The contributions which were selected through a rigorous international peer review process share exciting ideas that will spur novel research directions and foster new multidisciplinary collaborations.