The Wonderful World of Concrete

1
The Wonderful World of Concrete

• Modern Materials
• Technology
• Mr. Ford

2
BACKBONE OF CONSTRUCTION

• Concrete and Concrete products are the basis for
  most building and structural projects
• Some components are made on location and others
  are made elsewhere and brought to the job

3
The Concrete Recipe

• Crush some limestone into a fine powder
• Heat to about 2700 degrees
• The powdered cement is super dry
• Mix it with clean sand or stones called an
  Aggregate
• Add water and mix
• The hardening is called Hydration

4
The Chemistry of ConcreteorHow Does It Work?

• The Limestone Powder is very small and very dry
  like flour
• When it mixes with the Aggregate and water it
  swells around the small particles and reforms a
  rock-like substance holding the sand and stone in
  place
• The water causes chemical reaction to the
  powdered cement and it Hydrates into a solid
  substance

5
Time to Pour the Batch

• Once mixed it must be constantly stirred so it
  does not harden
• It is transported in special trucks to the
  job-site
• It is then poured into special containers called
  FORMS

6
Shape It

• The forms hold the wet concrete in place while it
  hardens
• The surface can also be smooth while it is still
  in a mud-like state
• This work is done in a hurry before it hardens,
  nobody takes a break at this time

7
Later

• It may take 1 day or up to a week for the
  concrete to fully harden
• The forms are then removed leaving the concrete
  structure

8
Building With Blocks

• Concrete can be made in smaller parts and
  transported to the construction site
• The parts are stuck together using a wet concrete
  called mortar.It acts like glue and the blocks
  are assembled like a giant LEGO set

9
Structures and Surfaces

• Concrete is used for buildings, roads and many
  projects that require strength and durability
• It is available in most places and has a low cost

10
Concrete has many uses
11
What would you make??