الملخص

Magnetically treated water was used for the determination of the physiomechanical properties (setting time, water/powder ratio (W/P) and compressive strength) of a local plaster of Paris. The results were compared with that of ordinary, and non-treated water to determine the same properties. It was found out that through using magnetically treated water, setting time has decreased by an average of (15.3 %); water powder ratio (W/P) has increased by an average of (2.4 %) and compressive strength has decreased by an average of (22.5 %) compared with the results of ordinary water. Thereforemagnetically treated water may be considered as an accelerator for the plaster of Paris rather than a retarder.