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Reinforced Concrete
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Reinforced Concrete

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  • 1. Reinforced Concrete
  • 2. Materials: Concrete • Cement • Fine Aggregate • Coarse Aggregate • Admixtures
  • 3. • Comp. Str. 2500 psi to as high as 20,000 psi. Usually 3000 to 7000 psi • Stress-strain behaviour:
  • 4. • Static Modulus of Elasticity • Poisson’s Ratio 0.11 to 0.21, usually taken as 0.15 • Shrinkage • Creep • Tensile Strength 8% to 15% of Compr. Str. • Shear Strength 1/3 to 4/5 of Compr. Str.
  • 5. Reinforcing Steel • Plain or Deformed steel bars (re-bar) • Dia. Indicated as fractions of an inch as: called as #3, #4 and #5 respectively. The bars are available from #3 to #11 and very large bars as #14 and #18 &
  • 6. Re-bar are marked for identification by manufacturer as shown
  • 7. Advantages Concrete • Considerable compressive Strength • Resistance to fire and environmental effects • Very rigid Structures • Low maintenance • Long Life • Economical • Possibility of use of local materials • Does not require highly skilled labour • Can be cast into variety of shapes
  • 8. Confederation Bridge Canada (12.5 km) Joining Prince Edward Island and New- Brunswick