An akmon is a multi-ton concrete block used for breakwater and seawall armouring.1 It was originally designed in the Netherlands in the 1960s, as an improvement on the tetrapod.2
References
References
- ANTHONY, JOHN (2 December 2011). "Concrete blocks shore up port defences". Taranaki Daily News. Retrieved 27 March 2017.
- "Development of Concrete Breakwater Armour Units" Archived 2008-10-03 at the Wayback Machine, Canadian Society for Civil Engineering, 2003.