Shrinkage, displayed in Fig. 9, is significantly influenced by both
the strategy and the temperature levels applied which is in
agreement with literature [12,14]. When air temperature is kept
constant, shrinkage is significantly higher than that of comparison
specimen which is initially dried at very high air temperatures. This
might be due to the fact that slow drying reduces internal stresses,
which in consequence results in increased shrinkage. Applying high
temperatures, however, increase internal stresses but at the same
time the resulting fast drying leads to a mechanical stabilisation of
the surface