Cement is a very important material in
Although the terms cement and concrete
often are used interchangeably, cement is
actually an ingredient of concrete.
Concrete is basically a mixture of aggregates
•Concrete is often the most economical choice.
•The material's ability to weather hurricanes and
tornadoes and its resistance to insects are valued.
•Builders also select concrete for its ﬁre resistance.
•Four methods of concrete construction are
commonly used to create load-bearing walls for
‣ Concrete masonry
Hydraulic cements harden because of hydration,
a chemical reaction between the anhydrous
cement powder and water.
They can harden underwater or when constantly
exposed to wet weather.
The chemical reaction results in hydrates that are
not very water-soluble and so are quite durable in
Non-hydraulic cements do not harden
underwater, like slaked limes harden by reaction
with atmospheric carbon dioxide.
Green cement is a cementitious material that
meets or exceeds the functional performance
capabilities of ordinary cement by incorporating
and optimizing recycled materials.
It reduces the consumption of natural raw
materials, water, and energy, resulting in a more
sustainable construction material.
The manufacturing process for green cement
succeeds in reducing and even eliminating the
production and release of damaging pollutants
and greenhouse gasses, particularly Carbon-
The most important uses of cement are:
• Ingredient in the production of mortar in
• Ingredient in the production of concrete, a
combination of cement and an aggregate to form
a strong building material.
•Twice as much concrete is used in construction around
the world than the total of all other building materials.
•Slightly more than half of all low-rise buildings in the
United States are constructed from concrete.
•The annual global production of concrete is about 5
billion cubic yards.
•The Global production of cement in 2000 was 1.56
billion tones, one-third of this was produced in China
•For the world capacity to produce cement in 2010, the
top three producers were China, India, and USA
accounting for just under half the world total capacity.
Cement numbers in Construction Industry