Since 1993 the Norwegian National Rail Administration (lBV) has been using Radcon Formula #7 as protection against water penetration into concrete decks of some 40 railway bridges. The largest bridge deck on which Radcon has been applied is about 5000 m.

Our experience so far is that Radcon Formula #7 gives a sufficient protection against moisture. The concrete we are using is of good quality, e.g. cube crushing strength of 45 MPa or higher, and it is in it self waterproof. However, cracks can never be avoided, not even when adequate measures are taken during the curing period. By applying Radcon Formula # 7 over the whole deck surface, we have experienced that the cracks get tightened and thus prevent moisture to find it”s way to the reinforcement.

It should be mentioned that we design our bridges for an expected life time of 100 years. The bridge decks are not directly exposed to rain and snow as they are covered with a layer of 0.55 m ballast. The decks have a downward gradient of not less than 1.4% towards drains, thus preventing any great accumulation of water.

Incepand cu 1993, Administratia Nationala Norvegiana a Cailor Ferate (lBV) a folosit Radcon Formula #7 ca protectie impotriva infiltratiei de apa in tablierele de beton la aproape 40 de poduri de cale ferata. Cel mai mare tablier de pod pe care a fost aplicat Radcon este de aproape 5000 m.

Experienta noastra de pana acum este ca Radcon Formula #7 asigura suficienta protectie impotriva umiditatii. Betonul pe care il folosim este de buna calitate, de ex. cuburile au o rezistenta la compresiune de 45 MPa sau mai mare, si este el insusi aproape impermeabil. Cu toate acestea microfisurile si crapaturile nu pot fi niciodata evitate, nici chiar daca se iau cele mai adecvate masuri pe durata intaririi. Aplicand Radcon Formula #7 pe toata suprafata tablierului, am obtinut o micsorare a fisurilor si astfel s-a evitat ca umiditatea sa-si gaseasca drum catre armatura.

Trebuie mentionat ca proiectam podurile pentru o durata de viata de 100 de ani. Tablierele de pod nu sunt expuse direct la ploaie si zapada pentru ca sunt acoperite cu un strat de 0,55 m de balast. Tablierele au o panta >= 1,4% spre drenuri, astfel prevenind orice acumulare mare de apa.