Concrete – Complementary British Standard to
BS EN 206-1 – Part 1: Method of specifying and guidance for the specifier
Table A.1 Exposure classes
Reinforced and prestressed concrete walls and structure supports within 10 m of a carriageway
Bridge parapet edge beams
Buried highway structures less than 1 m below carriageway level
Reinforced pavements and car park slabs
KDS 24 14 21에서는 다음과 같이 설명하고 있다.
이것은 차도로부터 6m 이내에 있는 모든 난간, 벽체, 교각을 포함하며, 또한 차도로부터 배출되는 물에 노출되기 쉬운 신축이음부(expansion joints) 하부 교각의 윗부분과 같은 표면을 포함한다.
Concise Eurocode 2 for Bridges
https://www.concretecentre.com/TCC/media/TCCMediaLibrary/Events/Online%20course/CCIP_EC2_Bridges.pdf
4 Durability and cover
4.1 Grneral
여기서 말하는 차도로 부터 수평방향 10m 이내와 높이방향 5m이내는
Droplet projection pattern as a function of mean vehicle speed, with dashed lines showing the basic trajectory of the model, derived from the collection of water in droplets at different ground levels and roadside distances (Tang and Utgenannt 2000)에서 제시된 그래프와 같다.
2024.04.16 - [업무관련] - 평균 차량 속도와 물방울 투영 패턴
EN 1992-2 4.2(106)
4.2 Environmental conditions
(104) Water penetration or the possibility of leakage from the carriageway into the inside of voided structures should be considered in the design.
(105) For a concrete surface protected by waterproofing the exposure class should be given in a Country’s National Annex.
NOTE For surfaces protected by waterproofing the exposure class for use in a Country may be found in its National Annex. The recommended exposure class for surfaces protected by waterproofing is XC3.
(106) Where de-icing salt is used, all exposed concrete surfaces within x m of the carriageway horizontally or within y m above the carriageway should be considered as being directly affected by de-icing salts. Top surfaces of supports under expansion joints should also be considered as being directly affected by de-icing salts.
NOTE 1 The distances x and y for use in a Country may be found in its National Annex. The recommended value for x is 6m and the recommended value for y is 6m.
NOTE 2 The exposure classes for surfaces directly affected by de-icing salts for use in a Country may be found in its National Annex. The recommended classes for surfaces directly affected by de-icing salts are XD3 and XF2 or XF4, as appropriate, with covers given in Tables 4.4N and 4.5N for XD classes.
KDS 24 14 21와 EN 1992-2 4.2(106)에서 추천값으로 수평방향(x)는 6m, 수직방향(y)는 6m로 되어 있다.
Tang and Utgenannt 2000에서 제시한 그래프에서 x=6m와 y=6m를 그려보면 그 범위는 다음 그림과 같다.
#염화물의 영향을 받는 범위
#차도로부터6m
2024.04.16 - [업무관련] - 평균 차량 속도와 물방울 투영 패턴
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