specimens tested at 7 days were both loaded at 50% of the average
compressive strength at 7 days.
To measure creep under drying conditions, four specimens were
tested at a concrete age of 64 days. Two specimens were loaded at
50% and two at 70% of the average compressive strength of concrete
measured at 64 days.
To perform tests under drying conditions, the self-adhesive aluminum
sheet was removed before placing a specimen in the creep
frame, just before loading. The specific relative humidity for drying
was 50%. The same procedure was used to determine the shrinkage
under drying conditions.