Corresponding Author: Email – [email protected] , Tel:+23459175497 AN INVESTIGATION INTO THE POZZOLANIC PROPERTIES OF DUTSIN DUSHOWA VOLCANIC ASH OF JOS PLATEAU Olawuyi, Babatunde James 1 Department of Building, Federal University of Technology, Minna, Niger State, Nigeria. 1 Olusola, Kolapo Olubunmi 2 Department of Building, Obafemi Awolowo University, Ile-Ife, Nigeria. 2 Babafemi, Adewumi John 2 Department of Building, Obafemi Awolowo University, Ile-Ife, Nigeria. 2