Design and Control of Concrete Mixtures Steel Reinforcement
- Slides: 27
Design and Control of Concrete Mixtures Steel Reinforcement Design and Control of Concrete Mixtures CHAPTER 11
Design and Control of Concrete Mixtures Overview • • • Why Use Reinforcement Reinforcing Support Reinforcing Bars Welded Wire Reinforcement Prestressing Steel
Design and Control of Concrete Mixtures Why Use Reinforcement in Concrete?
Design and Control of Concrete Mixtures Why Use Reinforcement in Concrete?
Design and Control of Concrete Mixtures Why Use Reinforcement in Concrete? • Also used for: – Some portion of compression loading – Diagonal tension or shear – Internal pressures in circular structures – Reducing crack sizes – Limit crack widths
Design and Control of Concrete Mixtures Reinforcing Bars (Rebar) • High tensile strength, strain compatibility • Bond between steel and concrete
Design and Control of Concrete Mixtures Grades ASTM A 615 - Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement • Grade 40 • Grade 60 • Grade 75 • Grade 80 ASTM A 706 - Standard Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete Reinforcement
Design and Control of Concrete Mixtures Reinforcing Bars Darwin and others 2015
Design and Control of Concrete Mixtures Reinforcing Bars Courtesy of CRSI
Summary of ASTM Strength Requirements for Reinforcement
Summary of ASTM Strength Requirements for Reinforcement
Design and Control of Concrete Mixtures Reinforcing Bars
Design and Control of Concrete Mixtures Corrosion Protection
Design and Control of Concrete Mixtures Epoxy Coated Reinforcement ASTM A 775 - Standard Specification for Epoxy-Coated Reinforcing Steel Bars ASTM A 934 - Standard Specification for Epoxy-Coated Prefabricated Steel Reinforcing Bars
Design and Control of Concrete Mixtures Epoxy Coating
Design and Control of Concrete Mixtures Zinc ASTM A 767 -Standard Specification for Zinc-Coated (Galvanized) Steel Bars for Concrete Reinforcement • Sacrificial physical barrier • Cathodic protection
Design and Control of Concrete Mixtures Stainless Steel Reinforcement ASTM A 955 - Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement
Design and Control of Concrete Mixtures Welded Wire Reinforcement (WWR) − − ASTM A 1064 ASTM A 1022 ASTM A 884 ASTM A 1060
Welded Wire Reinforcement
Welded Wire Reinforcement
Design and Control of Concrete Mixtures Prestressing Steel (Pretensioning)
Design and Control of Concrete Mixtures Prestressing Steel (Post-Tensioning)
Design and Control of Concrete Mixtures Prestressing Steel
Design and Control of Concrete Mixtures Prestressed and Post-Tensioned Concrete Precast/Prestressed Concrete Institute: http: //www. pci. org/ Post-tensioned Concrete Institute: http: //www. post-tensioning. org/
Standard Prestressing Tendons
Design and Control of Concrete Mixtures Summary • • • Why Use Reinforcement Reinforcing Support Reinforcing Bars Welded Wire Reinforcement Prestressing Steel
Design and Control of Concrete Mixtures ?