The present study deals with the physiochemical evaluation of gypsum deposits of Kohat region for their feasibility as gypsum plaster . Sixteen representative samples from Mami Khel and Lachi Jutta Ismail Khel areas of Kohat district were collected. After detailed laboratory investigations it was observed that by using cheap retarders in very small amounts in calcined gypsum (Plaster of Paris) of all the gypsum samples except a few may bring it feasible as gypsum plaster in accordance with the specifications.


H KHAN ,M FAISAL ,M Z CHUGHTAI ,F KANWAL ,S A KHAN ,