Uses of nano technology in construction 1.Nano Technology for concrete 2. Nano Technology for Steel 3. Nano Technology for wood 4. Nano Technology for glass 5.Sustainability and environment

2.  Nanotechnology is concerned with objects
between 1 and 100nm in size. 1 Nanometer =
1 x 10 ^-9 m.
 Nanotechnology is the use of very small
particles of material either by themselves or
by their manipulation to create new large
scale materials.

3.  The addition of nano-silica (SiO2) to cement
based materials can control the degradation
of the calciumsilicatehydrate reaction caused
by calcium leaching in water, blocking water
penetration and leading to improvements in
durability.

4.  Use of nano SiO2 could significantly increase
the compressive for concrete, containing
large volume fly ash, at early age and
improve pore size distribution by filling the
pores between large fly ash and cement
particles at nanoscale.

6.  The addition of small amounts (1%) of carbon
nanotubes can improve the mechanical
properties of mixture samples of portland
cement and water.
 could increase both compressive and flexural
strength.

8.  Steel is a major construction material. Its
properties, such as strength, corrosion
resistance, and weld ability, are very
important for the design and construction.
 It is possible to develop new, low carbon, high
performance steel (HPS).

9.  The new steel was developed with higher
corrosion-resistance and weld ability by
incorporating copper nanoparticles from at
the steel grain boundaries.
 The addition of copper nanoparticles reduces
the surface unevenness of steel which then
limits the number of stress risers and hence
cracking, leading to increased safety.

11.  The addition of nanoparticles of magnesium
and calcium leads to an increase in weld
toughness.

12.  Wood is composed of nanotubes or
“nanofibrils”.
 Lignocellulosic surfaces at the nanoscale
could open new opportunities for such things
as self sterilizing surfaces, internal self-repair,

13.  Highly water repellent coatings incorporating
silica and alumina nanoparticles and
hydrophobic polymers are proper to be used
for wood.

14.  The use ofTiO2 nanoparticles to glasses leads
to so-called self cleaning technology.
 As well,TiO2 being hydrophilic, his attraction
to water forms drops which then wash off the
dirt particles decomposed in the previous
process.

16.  Increased consumption of raw materials in
the construction industry affects the
environment, economy, and society.
 Nanotechnology reduces the use of raw
materials required.

17.  In cement production large amounts of
carbon dioxide is produced.
 By adding additives such as belite, calcium
sulfo-aluminate and calcium alumino-ferrite,
carbon dioxide reduction can be reduced by
25 %.

18.  Nanotechnology has the potential to be the
key to a brand new world in the field of
construction and building materials.
 a number of promising developments exist
that can potentially change the service life
and cost of construction infrastructure to
make a new world in the future.