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Prevention of damages

Strategies for preventing sulfate attack

>    Application of European standards and national standards/rules for preparation of concrete

•    Apply requirements for respective exposure class and additional national requirements

>    Use of sulfate resistant cement (Portland cement Iow in AI203 or adequate composite cements, e.g. CEM III)

>    Avoidance of limestone fillers or composite cement with a higher amount of limestone -> minimizing the risk of Thaumasite formation

>    Sulfate attack of concrete in Sweden in tunnel environment is rare

•    Only few cases with very old concrete

•    Strategy with using sulfate resistant cements for most tunnels seem to work

5 cbi Betonainstitutet    Vatten i anlaggningsprojekt Góleborg 2013-11 -