A dolos (plural: dolosse) is a reinforced concrete block in a complex geometric shape weighing up to 80 tonnes (88 short tons), used in great numbers as a form of coastal management to build revetments for protection against the erosive force of waves from a body of water.
The Dolos, an internationally acclaimed solution to erosion and harbour protection turns 53 this year. Invented in 1963 by South African Engineers Eric Mowbray Merrifield and Aubrey Kruger, this uniquely South African design has proved itself the world over. Read all about it here:

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