ABSTRACT
Therewere three types of free shrinkagemeasurement: one on prisms of 100 × 100 × 530mm3 starting at an age of 1 day in 20◦C and 65% RH. The second and third measurement type was performed on dog-bone shaped specimens with a central prismatic portion of 80 × 100mm2 cross-section. In both cases the specimens were stored up to an age of 7 days moist, then wrapped into foil and stored in 20◦C and 65% RH until the shrinkage measurement started on the 29th day in a room with 20◦C and 50% RH. The specimens prepared for the second type of shrinkage measurement remained inside the wrapping during the whole observation period. The specimens of the third measurement type have been unwrapped at an age of 29 days. The wrapping should simulate a thick-walled structural element which dries only very slowly.
