In the last three decades, an extensive literature has documented different concrete mixtures and supplementary cementitious materials (SCMs) to reduce CO2 emissions from concrete production. Recent findings show the importance of low pH concrete for improved marine life on the structure, and identify surface roughness as the most effective factor in design of bioreceptive concrete. Few studies have investigated the design of breakwaters by modifying the chemical composition of concrete, with limited information regarding the exact composition of these mixtures. Effort is needed to investigate the suitability of these materials for the construction of low-coastal structures (LCS) to decrease CO2 emissions and improve the bioreceptivity of concrete armor units during the breakwater lifetime. In this work, different SCMs, water-to-powder ratios and aggregates are investigated for the proposal of feasible concrete mixtures to construct LCS, showing as example the manufacture of Cubipod units for Homogeneous Low-Crested Structures.
