Abstract
Objective of the work: This study focused on the investigations of the pozzolanic activity of the pumice under different curing temperatures and durations. 
 Materials and Method: Pumice powder, standard sand and slaked lime were used as materials in this study. Within the scope of the study, only one mixture design was used following TS 25. In total, 9 different curing regimes such as three different heat cures at 55˚C, 75˚C, and 90˚C and three different curing durations as 7, 14, and 28 days for each curing temperature. Some experimental analyses including compressive strength, flexural strength, and ultrasonic pulse velocity test were conducted to investigate the effect of the curing conditions on the pozzolanic activity of pumice. 
 Results: The pozzolanic activity of pumice increased with increasing curing temperature and duration up to a certain level. The optimum curing regime obtained for the puzzolanic activity of pumice in this study was curing at 75 ˚C for 28 days, which the highest strength values were obtained with.
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