EFFECTS OF FIRING TEMPERATURE ON SOME PHYSICAL PROPERTIES OF BURNT CLAY BRICKS PRODUCED AROUND ADDIS ABABA Altayework Tadesse Belayneh A Thesis submitted to The Department of Civil Engineering Presented in partial Fulfillment of the Requirements for the Degree of Master of Science in Civil Engineering (Construction Technology and Management) Addis Ababa University Addis Ababa, Ethiopia June 2013