Cement is subject to degradation by aggressive media found in the environment. Durability tests are therefore necessary for any cementitious material in a given aggressive environment. This study investigated chloride and sulphate diffusivity in mortar made from selected Kenyan cements. In this study, test cements were selected Kenya OPC and PPC. The test cements were labeled with respect to company source and cement category; the letters A, B and C represented companies while O and P represented OPC and PPC respectively. AO for example, represents OPC from company A and AP represents PPC...