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Environment

The environmental conditions for a member can be specified in this window. The range of conditions is based on the chapter 4.2 of EN 1992-1-1. The conditions influence the calculation of minimum (indicative) strength class and minimum reinforcement cover. These procedures are described in the chapters "Indicative strength class" and "Minimum cover" of theoretical help.

Description of options:

Corrosion induced by carbonation

X0 - No risk of carbonation

  • Concrete inside buildings with very low air humidity

XC1 - Dry or permanently wet

  • Concrete inside buildings with low air humidity, concrete permanently submerged in water

XC2 - Wet, rarely dry

  • Concrete surfaces subject to long-term water contact. Examples: most of foundations

XC3 - Moderate humidity

  • Concrete inside buildings with moderate or high air humidity, external concrete sheltered from rain

XC4 - Cyclic wet and dry

  • Concrete surfaces subject to water contact, not within exposure class XC2. Examples: cantilever walls, external structures

Corrosion induced by chlorides

X0 - No risk

  • No risk of corrosion induced by chlorides

XD1 - Moderate humidity

  • Concrete surfaces exposed to airborne chlorides

XD2 - Wet, rarely dry

  • Swimming pools, concrete components exposed to industrial waters containing chlorides

XD3 - Cyclic wet and dry

  • Parts of bridges exposed to spray containing chlorides, pavements, car park slabs

Corrosion induced by chlorides from sea water

X0 - No risk

  • No risk of corrosion induced by chlorides from sea water

XS1 - Exposed to airborne salt but not in direct contact with sea water

  • Structures near to or on the coast

XS2 - Permanently submerged

  • Parts of marine structures

XS3 - Tidal, splash and spray zones

  • Parts of marine structures

Freeze/Thaw Attack

X0 - No risk

  • Concrete inside buildings not exposed to rain and freezing

XF1 - Moderate water saturation, without de-icing agent

  • Vertical concrete surfaces exposed to rain and freezing

XF2 - Moderate water saturation, with de-icing agent

  • Vertical concrete surfaces of road structures exposed to freezing and airborne de-icing agents

XF3 - High water saturation, without de-icing agents

  • Horizontal concrete surfaces exposed to rain and freezing

XF4 - High water saturation with de-icing agents or sea water

  • Road and bridge decks exposed to de-icing agents, concrete surfaces exposed to direct spraycontaining de-icing agents and freezing, splash zone of marine structures exposed to freezing

Chemical attack

X0 - No risk

  • Concrete not exposed to aggressive chemical environment

XA1 - Slightly aggressive chemical environment according to EN 206-1, Table 2

  • Natural soils and ground water

XA2 - Moderately aggressive chemical environment according to EN 206-1, Table 2

  • Natural soils and ground water

XA3 - Highly aggressive chemical environment according to EN 206-1, Table 2

  • Natural soils and ground water

Window "Environment"

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