Lecture 11 - Concrete -
Construction
Type Lecture
Date @November 23, 2023
SIZING GUIDELINES.pdf https://www.youtube.com/watch?
Materials v=k2zj1otlLl8&ab_channel=ShannonHilchie
Reviewed
Concrete Basics
Concrete Advantages and Disadvantages
Concrete Applications
Concrete Sizing Guidelines
Concrete Construction
Reinforced Concrete
Lecture 11 - Concrete - Construction 1
, Compression: Concrete
Tension: Steel Rebar (Reinforcing Bar)
Shear: Concrete or Concrete + Steel
Black dots are reinforcing elements doing
the work for bending, tension, and
compression elements. Border is sheer
reinforcing Concrete is doing compressive
work, steel is doing anything in tension
Rebar (Reinforcing Bars)
fy = 400 MPa Some Notes:
E = 200,000 MPa 10M bars are really floppy, and bend if
stepped on. Tend to only use for Shear
Sizes A (mm^2)
Reinforcing.
10M 100
15M 200
20M 300
Lecture 11 - Concrete - Construction 2
, 25M 500 Space as low as 2.5φbar or as high as
30M 700 500mm or 3xtwall/slab
35M 1000
45M 1500 Usually, fewer large bars is cheapest but
more smaller bars work better.
55M 2000
45 and 55M are available, but are a last
resort. More smaller bars are better.
Concrete
Application f’c (strength)
Footings, Caissons 20 MPa
Foundation Walls, Slab on Grade 25 MPa
Framed Slab, Columns (low-rise) 30 MPa
Columns (mid-rise) 30 to 40 MPa
Columns (high-rise) 30 to 70 MPa
Factors:
Water/cement ratio
Entrained air (tiny air bubbles)
Stress-Strain Curves
Concrete (Compression) Reinforcing Steel
Lecture 11 - Concrete - Construction 3
Construction
Type Lecture
Date @November 23, 2023
SIZING GUIDELINES.pdf https://www.youtube.com/watch?
Materials v=k2zj1otlLl8&ab_channel=ShannonHilchie
Reviewed
Concrete Basics
Concrete Advantages and Disadvantages
Concrete Applications
Concrete Sizing Guidelines
Concrete Construction
Reinforced Concrete
Lecture 11 - Concrete - Construction 1
, Compression: Concrete
Tension: Steel Rebar (Reinforcing Bar)
Shear: Concrete or Concrete + Steel
Black dots are reinforcing elements doing
the work for bending, tension, and
compression elements. Border is sheer
reinforcing Concrete is doing compressive
work, steel is doing anything in tension
Rebar (Reinforcing Bars)
fy = 400 MPa Some Notes:
E = 200,000 MPa 10M bars are really floppy, and bend if
stepped on. Tend to only use for Shear
Sizes A (mm^2)
Reinforcing.
10M 100
15M 200
20M 300
Lecture 11 - Concrete - Construction 2
, 25M 500 Space as low as 2.5φbar or as high as
30M 700 500mm or 3xtwall/slab
35M 1000
45M 1500 Usually, fewer large bars is cheapest but
more smaller bars work better.
55M 2000
45 and 55M are available, but are a last
resort. More smaller bars are better.
Concrete
Application f’c (strength)
Footings, Caissons 20 MPa
Foundation Walls, Slab on Grade 25 MPa
Framed Slab, Columns (low-rise) 30 MPa
Columns (mid-rise) 30 to 40 MPa
Columns (high-rise) 30 to 70 MPa
Factors:
Water/cement ratio
Entrained air (tiny air bubbles)
Stress-Strain Curves
Concrete (Compression) Reinforcing Steel
Lecture 11 - Concrete - Construction 3
