Effect of Heat on Properties of Reinforcing Steel Bars Made From Scrap.

      Аннотация: Fatigue performance and deterioration of mechanical properties of rebars at elevated temperature is of primary concern to the design and analysis of steel structures exposed to fire. This book provides data and insights on fatigue performance and effect of heat on mechanical properties of 10, 12 and 16 mm rebars made from local metal scrap. Fatigue tests in air were conducted at room temperature using as-received 12 mm rebar specimens. Separately, experiments were also conducted to establish the effect of heat on mechanical properties of the 10, 12 and 16 mm rebars. The rebars were heated using an electric furnace to temperatures ranging from 22 to 1000°C for one hour. Thereafter some rebars were cooled by quenching in water and some by cooling in air. The mechanical properties determined included the Yield stress, Tensile Strength, Percentage Elongation, Modulus of Elasticity, Brinell hardness and Charpy-V impact tests. This book is useful to the steel producers, designers, building Industry, engineering students, standards developing organization and researchers of rebar steel structures exposed to extreme temperatures.

Ключевые слова: Elevated Temperature, Fire, mechanical properties, microstructure, rebar steel