Olhão quay & cables
Europe, Portugal, Algarve, Sotavento, Olhão, Fishery harbour, Degraded concrete quay, Beton rot, Rebar, Cables, Knots (uncut)
When due to damage to the surface of reinforced concrete (salt), water can reach the rebar, it will start to rust and cause the concrete to disintegrate. This is commonly as ‘concrete rot’. Some background about it: The expansion of the corrosion products (iron oxides) of carbon steel reinforcement structures may induce internal mechanical stress (tensile stress) that causes the formation of cracks and disrupts the concrete structure. If rebars have been improperly installed or have inadequate concrete cover at surfaces exposed to the elements, oxide jacking and spalling can occur during the structure's lifetime: flat fragments of concrete are detached from the concrete mass as a result of the rebar's corrosion. (Source: wiki).
This is number 11 of the Bollard album, though strictly spoken, the metal ring isn’t one and 61 of Olhão & Ilha da Culatra.
Olhão quay & cables
Europe, Portugal, Algarve, Sotavento, Olhão, Fishery harbour, Degraded concrete quay, Beton rot, Rebar, Cables, Knots (uncut)
When due to damage to the surface of reinforced concrete (salt), water can reach the rebar, it will start to rust and cause the concrete to disintegrate. This is commonly as ‘concrete rot’. Some background about it: The expansion of the corrosion products (iron oxides) of carbon steel reinforcement structures may induce internal mechanical stress (tensile stress) that causes the formation of cracks and disrupts the concrete structure. If rebars have been improperly installed or have inadequate concrete cover at surfaces exposed to the elements, oxide jacking and spalling can occur during the structure's lifetime: flat fragments of concrete are detached from the concrete mass as a result of the rebar's corrosion. (Source: wiki).
This is number 11 of the Bollard album, though strictly spoken, the metal ring isn’t one and 61 of Olhão & Ilha da Culatra.