On the Properties Evolution of Eco-Material Dedicated to Manufacturing Artificial Reef via 3D Printing: Long-Term Interactions of Cementitious Materials in the Marine Environment

This paper deals with the evolution monitoring of biomass colonization and mechanical properties 3D printed eco-materials/mortars immersed in sea. Measurements tensile strength, compressive Young’s modulus were determined on samples deployed along Atlantic coast Europe, France, United Kingdom, Spain, Portugal. The manufactured using printing, where six mix designs a low environmental impact binder used. These mortars based geopolymer cementitious binders (Cement CEM III), which sand is replaced by three types recycled sand, including glass, seashell, limestone 30%, 50%, 100% respectively. concrete micro/macro-organisms their durability also evaluated after 1, 3, 6, 12, 24 months immersion. results showed that both better III compared to geopolymer-based compositions. Therefore, mixed design optimized according show use should be preferred over these for artificial reef applications.