Download presentation
Presentation is loading. Please wait.
Published byEmil Long Modified over 9 years ago
1
Reinforcement Design and Control of Concrete Mixtures – Chapter 8
2
Overview Why Use Reinforcement in Concrete? Reinforcing Bars Welded Wire Reinforcement Prestressing Steel Fibers
3
Why Use Reinforcement in Concrete?
5
Also used for: Some compression Diagonal tension or shear Internal pressures in circular structures Reducing crack sizes Limit crack widths
6
Steel Reinforcement
7
Reinforcing Bars (Rebar) High tensile strength, strain compatibility Bond between steel and concrete ASTM A615 – commonly grade 60 ASTM A706 – weldable rebar
8
Reinforcing Bars
13
Welded Wire Reinforcement (WWR)
14
WWR
15
Prestressing Steel
18
Fibers
20
Steel Fibers
22
SIFCON
23
Glass Fibers
24
Synthetic Fibers
26
Acrylic fibers – asbestos replacement Aramid fibers – 2.5x stronger than E-glass, 5x stronger than steel, good temperature stability Carbon fibers – high strength and elastic modulus Nylon fibers – good tenacity, toughness, elastic recovery Synthetic fibers also used in stucco and mortar
27
Natural Fibers Used long before other forms of reinforcement ASTM D7375, ASTM D6942 Unprocessed natural fibers Processed natural fibers – wood fibers
28
Multiple Fiber Systems Hybrid-fiber concrete Macro- and microsteel fibers Steel and polypropylene
29
Summary Why Use Reinforcement in Concrete? Reinforcing Bars Welded Wire Reinforcement Prestressing Steel Fibers
30
Questions
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.