NANOTECHNOLOGY PRESENTED BY:- RUDRA PRATAP SINGH

CIVIL ENGINEERING 4th YEAR

SR. NO.-17/CE/10 DR.B.R.A.E.C.I.T. BIJNOR

HBTI KANPUR CAMPUS

WHAT IS NANOTECHNOLOGY

“Nanotechnology is the science that deals with the matters at nanoscale”

Nanotechnology is the re-engineering of materials by controlling the matter at the atomic level.

INTRODUCTION• Nanotechnology is not a new science and not

a new technology.• It is just the extension of technologies that

have been in development for many years.• It is an extension of common sciences into the

nanoscale.• It is the manipulation of materials at

nanoscale

NANO MATERIALS USE TO MODIFY CONSTRUCTION MATERIALS

• NANO - SILICA (Nano-SiO2)

• NANO- TITANIUM OXIDE (Nano-TiO2)

• NANO-IRON (Nano-Fe2O3)

• NANO-ALUMINA (Nano-Al2O3) • NANOSIZED CEMENT PARTICLES• NANOBINDERS• NANOCLAY PARTICLES • CARBON NANO TUBE• NANOSENSORS

NANO-SiO2• Improves concrete workability and strength• Increase the resistance to water penetration• Even a small addition (.25%) can improve the 28 day

compressive strength by 10% and flexural strength by 25%.

• It act as an activator to promote pozzolanic reactions.

Spherical Nano-SiO2

particles of uniform distribution ( of size 20 nm and 100 nm)

NANO-TiO2• It improves the self-cleaning property of

concrete• It help to clean the environment by the

degradation of pollutant NOx, CO, VOCs, coming from vehicle and industries

Building made by using self-cleaning concrete (Church ‘‘Dives in Misericordia”,Rome, Italy)

NANO-Fe2O3

• IT provide concrete with self-sensing capabilities

• It improves the compressive and flexural strengths of concrete.

NANO-Al2O3

It increase the modulus of elasticity (up to 143% at a dosage of 5%).

NANOSIZED CEMENT PARTICLES

• Cement pastes made with nanosized cement particles have shown faster setting times

• It provides an increase in early compressive strength compared to pastes prepared with common.

NANOBINDERS• The concept of a nanobinder involves

mechano-chemical activation of cement.• Mechano-chemical modification of cement

increase the compressive strength by up to 62%.

NANOCLAY PARTICLES • It improves the mechanical performance of

concrete• It improves resistance to chloride penetration of

concrete• It improves self-compacting properties of concrete • It reduces permeability and shrinkage of concrete• It improves post-failure properties of the concrete.

CARBON NANO TUBE• It has moduli of elasticity

and tensile strength.• It has a unique electronic

and chemical properties.• It improves the pressure

sensitive properties of mortars.

• It is when added with dispersing agent to cement will increase the Young’s modulus and hardness of the paste.

Graphite sheets of nanotubes

NANOSENSORS• This is used in construction to monitor

and control the environment condition and the material performance.

• The sensors can also be used to monitor concrete corrosion and cracking.

• These improve reliability allowing better addressability and the ability to identify false alarms.

• It can monitor internal stresses, cracks and other physical forces in the structures during the structures' life.

• It is capable of providing an early indication of the health of the structure before a failure of the structure can occur.

Manufactured MEMS chip

GLASS• TiO2 improves the self cleaning property of

glass.• SiO2 makes the glass fire resistance.• It helps the glass to block light and heat

coming from outside.• It filter out unwanted infrared frequencies of

light (which heat up a room) and reduce the heat gain in building

NANOTECHNOLOGY IN COATING

• Coating is an area of significant research in nanotechnology.

• This coating is used for corrosion protection under insulation since it is hydrophobic and repels water from the metal pipe and can also protect metal from salt water attack.

• The TiO2 will break down and disintegrate organic dirt through powerful catalytic reaction.

• It is hydrophilic, which allow the water to spread evenly over the surface and wash away dirt previously broken down.

NANOTECH IN INDIA• It is a government initiative programme.• The high cost research and infrastructure development

prevented significant industry and venture capital (VC) participation in nanotechnology research and development.

• The nanotechnology industry is in its infancy in India although it appears to be emerging with companies like Darbur active in nanodrug delivery, Mahindra and Mahindra looking at nanomaterials for enhancing the performance of automobiles, Tata chemicals researching nanopesticide delivery mechanisms.

HEALTH CONCERN• Nanotechnology based construction products might be

harmful to health.• The nanotubes might cause lung problems to the workers.• The possibility of DNA damage resulting in later cancer

development.• It can be dangerous to human health if the particles

become airborne.• The inhalation of TiO2 particles with a primary particle size

between 2 and 5 nm, reporting lung inflammation for a concentration of 8.8 mg/m³.

CONCLUSION • Nanotechnology offers incremental

improvements in the field of construction engineering.

• It improves the performance of concrete and to lead to the development of novel, sustainable, advanced cement based composites with unique mechanical, thermal, and electrical properties.

• The main limitation is the high costs of nanotechnology,

• And also concerns with the environmental and health effects

THANK YOU