Betoonkaitsekiht on kaugus armatuuri pinnast kuni betooni lähima pinnani. Kaitsekiht peab tagama nakkej?udude ülekandmise, piisava tulekindluse ja terase küllaldase korrosioonikaitse. Viimane s?ltub armatuuri ümbritseva püsiva leeliskeskkonna olemasolust, mis saadakse kvaliteetse betoonikihi küllaldase paksusega. Kaitsekihi paksus c s?ltub keskkonnatingimustest (niiskus, läbikülmumise võimalus, agressiivne keskkond, s.h. kokkupuude mereveega) ja konstruktsiooni valmistamise kvaliteedist ...
Many of these so-called classes are in fact "intended use categories" (e.g. sootfire resistance "classes" for chimneys – with or without), "exposure conditions" (e.g. exposure "classes" XC1 (dry), XC2 (wet, rarely dry) etc for concrete) or even "product types" (e.g. "classes" of cement type CEM I, CEM II etc).
Examples of the types of exposure that should be considered are temperature variations (daily, monthly, annual, freeze-thaw conditions etc), incidence of solar radiation, humidity, rainfall, wind speed etc (i.e. related to "normal" use of the product).
The following table shows the minimum concrete cover of reinforcement related to different ambient conditions.
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