Page 16EN 206-1:2000Table 1(continued)Class designa-Description of the environment Informative examples where exposure classes maytionoccur3 Corrosion induced by chlorides other than from sea waterWhere concrete containing reinforcement or other embedded metal is subject to contact with water containingchlorides, including de-icing salts, from sources other than from sea water, the exposure shall be classified asfollows:NOTE Concerning moisture conditions see also section 2 of this table.XD1 Moderate humidity Concrete surfaces exposed to airborne chloridesXD2 Wet, rarely dry Swimming poolsConcrete exposed to industrial waters containingchloridesXD3 Cyclic wet and dry Parts of bridges exposed to spray containing chlo-ridesPavementsCar park slabs4 Corrosion induced by chloridesfrom sea waterWhere concrete containing reinforcement or other embedded metal is subject to contact with chlorides fromsea water or air carrying salt originating from sea water, the exposure shall be classified as follows:XS1 Exposed to airborne salt but not in di-Structures near to or on the coastrect contact with sea waterXS2 Permanently submerged Parts of marine structuresXS3 Tidal, splash and spray zones Parts of marine structures5 Freeze/thaw attack with or without de-icing agentsWhere concrete is exposed to significant attack by freeze/thaw cycles whilst wet, the exposure shall be classi-fied as follows:XF1 Moderate water saturation, without de-Vertical concrete surfaces exposed to rain andicing agentfreezingXF2 Moderate water saturation, with de-Vertical concrete surfaces of road structures expo-icing agentsed to freezing and airborne de-icing agentsXF3 High water saturation, without de-icingHorizontal concrete surfaces exposed to rain andagentfreezingXF4 High water saturation, with de-icingRoad and bridge decks exposed to de-icing agentsagent or sea waterConcrete surfaces exposed to direct spray con-taining de-icing agents and freezingSplash zones of marine structures exposed tofreezingTable 1(continued)
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