Quality Assessment of Reinforcing Steel Used in Residential Building in Duhok City at Kurdistan - Iraq

Abstract

Construction of residential houses usually faces various issues and problems due to the use of poor quality materials such as the steel reinforcing bar. The steel reinforcement process is an integral factor responsible for resisting tension while the concrete complex is being reinforced. The steel rebar currently used in Duhok governorate are majorly sourced from local manufacturers, with a portion is imported from neighboring countries. The sampling process involved four local rebar brands and an extra three imported (do not permit to disclose their brand names). The 12 mm steel bars were tested on the basis of tensile strength and elongation. The results were established after comparing the recent standard specification codes in British, American, and Iraqi. The results showed the majority of steel brands used in Duhok governorate to meet standards specification. However, there were some differences in some brands with regards to the ultimate strength, elongation, effective diameter, and mass.