Transcript Concrete - Ohio University

Concrete
One of the major building materials, (along
with wood, steel, stone and brick), that can be
used to make large and small elements, from
parking garages, to coffee tables.
• Concrete is a construction material composed of
cement (typically Portland cement) as well as other
cementitious materials such as fly ash and slag,
cement, aggregate,(generally a coarse aggregate
such as gravel, limestone or granite, plus a fine
aggregate such as sand), water, and chemical
admixtures that can affect the character of the
concrete.
• The word concrete comes from the Latin word
"concretus", which means "hardened" or "hard".
• Concrete solidifies and hardens after mixing with
water and placement due to a chemical process
known as hydration.
• The water reacts with the cement, which bonds the
other components together, eventually creating a
stone-like material.
Pouring concrete into formwork made of plywood sheets. Note the steel
reinforcing, rebar.
Rebar are marked in increments of 1/8”. A number ‘4’ rebar is 4/8” in
diameter. A number 12 rebar is 12/8”, or 1 1/2” in diameter.
Concrete walls with the formwork removed.
Small scale backyard concrete pour into plywood forms.
Plywood formwork ready for concrete pouring.
A small rolling seat, with a concrete slab as sitting
surface.
Large scale concrete pour using an overhead crane
to place a large bucket of wet concrete.
A concrete floor slab being finished using a ‘screed’,
a tool used to level and begin smoothing the concrete.
A prefabricated train station shelter.
The following images show the overall and the
individual parts that makeup this structure.
You can see how thin the shell of concrete is. Careful
design and fabrication make this level of delicacy
possible.
The ‘Askew’ table by Oso Industries
osoindustries.com
Concrete reception desk
by Uniqrete, Co Laois, Ireland.
Concrete bed and bathtub
by
Compact Concrete
Concrete table and chair
by Gary Simpson of Kaldari, Laguna Beach, CA.
Concrete garden furniture.
A concrete counter top
a small scale ‘slab’
Concrete Pod by architect Kazuya Morita
• "Concrete-pod" is made from fiber reinforced
concrete, which is the mixture of white cement and
light-weight aggregate and glass fiber.
• The diameter and the height of "Concrete-pod" is
1700mm each, thickness of shell is only 15mm.