Cairns, MHoltzhausen, AntonWehlitz, Carl-Peter FV2025-03-102025-03-102024-04978-2-87223-041-9http://hdl.handle.net/10204/14140The Cubilok™ is a new concrete armour unit developed by PRDW Consulting Ports and Coastal Engineers, with the flexibility to modify its shape and structural robustness. This study was the first attempt to understand the modified unit’s hydraulic stability and recommended wave overtopping rate. The primary objective of this research was to investigate the behaviour of the Cubilok at slopes of 1:1.5 and 1:1.33 (V:H), which involved testing various wave heights and periods. The unit’s viability as a single and double layer was investigated in this study. The research comprised of multiple 2D physical model setups and was conducted at the CSIR in Stellenbosch, South Africa. The results indicated that the Cubilok performed well on steeper slopes, showing potential competitiveness with other single-layer units. Additionally, the results indicated that the overtopping rate increased significantly for low wave steepness values. Further investigations are suggested to address variability in test results.AbstractenConcrete armour unitCubilok™Hydraulic stabilityPhysical modelConference Presentationn/a