ABSTRACT
When water comes in contact with cement, a chemical reaction takes places by which heat is being generated. Mainly for structures with thick walls, where the resulting heat cannot dissipate rapidly to the environment, the temperatures in a structures can rise considerably. If the corresponding volume variation is prevented, the structure may crack. Depending on the kind of structure, this early age thermal cracking can or cannot be allowed. Criteria for controling or preventing early age thermal cracking can for instance be judged on base of water tightness or preventing corrosion of reinforcement. In this present investigation water tightness of a structure has been the main design criterion.
