ABSTRACT
Plain concrete has two major deficiencies: low tensile strength and low strain at fracture. The tensile strength of concrete is very low because plain concrete normally contains numerous microcracks. It is the rapid propagation of these microcracks under applied stress that is responsible for the low tensile strength of the material. These deficiencies have led to considerable research aimed at developing new approaches to modifying the brittle properties of concrete (Subramanian 2013). The most common approach is to add reinforcement to the tensile zone of concrete. Concrete reinforcement may be in the form of reinforcing bars (rebars), mesh, strand,
13.1 Introduction .................................................................................................. 373 13.2 Building Green with RC ............................................................................... 374
13.2.1 Brief History of Steel Reinforcement ............................................... 374 13.3 Types of Reinforcing Steel ........................................................................... 375
13.3.1 Different Grades of Steel Rebars ...................................................... 375 13.3.1.1 American Society for Testing and Materials Grades
for Rebars, Fibers, and Headed Rebars.............................. 376 13.3.2 Steel Reinforcement Used in RC ...................................................... 377
13.4 Corrosion of Steel Reinforcement ................................................................ 382 13.4.1 Effect of Corrosion on Bridges ......................................................... 383 13.4.2 Mitigation of Corrosion ....................................................................384
