Curing of Specimen
Both ASTM and EN specifications require the specimens to
be left in the mould for the first 16 hours up to a maximum
of three days, protected against shock, vibration and
dehydration at a temperature from 20 ± 5°C or 25 ± 5°C in
hot climates (EN method) and 16 to 27°C (ASTM method).
After the removal from the moulds the specimens have to
be stored in a moist condition at 20 ± 2°C (EN)
or 23 ± 1.7°C (ASTM) with a relative humidity ≥ 95%.
Alternatively they can be cured in water at the same temperature