aerogel (civil engineering

GREETINGS TO ALL

‘AEROGEL’

What is Aerogel.? ?•Aerogel is the lightest solid ever known with incredible properties that have a wide range of applications.

Aerogel is a solid with the lowest density of any solid on the earth , only three times as dense as air (aerogel density≈0.095g/cm³).

• It is highly porous and also known as “frozen smoke”.

History of Aerogel •Aerogel was first created by Samuel Stephen Kistler in 1931.

• They are nanoporous structure of solids produced by super critical drying of parent solid material which provides properties such as thermal insulation, making it extremely competitive for constructions.

PROPERTIES

* Low density and high porosity. 90-99.9%* Low thermal conductivity0.005-.0W/mK* Huge internal surface (10-2000m²/g)* Transparent , opaque or can be colored , variable refractive index (1.001-2.1)* Ultra low dielectric conductivity (K=1.0-2.0)* Ultra low index of refraction (n≈1.05)

• Aerogels are good thermal insulators because they almost nullify two of the three methods of heat transfer.(conduction, convection, radiation)

•Due to Rayleigh scattering of shorter wavelength of visible light by nanosized dendrite , • it appears smoky blue against dark backgrounds

•Hence its helpful in the application in decorating construction structures and thus increasing the appearance

APPLICATIONS OF AEROGEL IN CIVIL ENGINEERING

•Thermal insulations: home buildings, vehicles, pipe lines packaging

• Architecture: illumination, super light concrete, super light bricks, wall isolation by thermal insulation, windows glazing

Where to use aerogel in commercial construction.

Aerogel glazing for windows

Aerogel insulated windows

charecterisitics

AEROGEL CONCRETE

AEROGEL INSULATION IN RESIDENTIAL HOUSES

Thermablok aerogel insulating strips may be installed to the stud either on the exterior or interior side of the wall framing. Insulate the full length of framing members. Apply to all wall, floor or ceiling framing edges: headers, footers, trusses, window and door frames, floor joist and roof rafters. 

Thirty-five percent of home heating costs are the result of energy loss through the exterior walls because of thermal bridging. Thermablok Eliminates Thermal Bridging.

Benefits of Thermablok Aerogel

Insulation

* Significant savings in energy costs.

* 100% recyclable.

* Contains no ozone-depleting substances.

* Cradle to Cradle Silver Certification.

* Uses 30-percent recycled content.

* Composite material consisting of more than 95-percent air.

* Significant savings in energy costs.

* 100% recyclable.

* Contains no ozone-depleting substances.

* Cradle to Cradle Silver Certification.

* Uses 30-percent recycled content.

* Composite material consisting of more than 95-percent air.

* Naturally hydrophobic, unaffected by moisture, mold, or water.

*Easily applied via stick-on backing.

* Class "A" fire rated.

* Economical.

* Virtually no weight means low shipping cost (and low emission).

* Adds acoustical integrity.

*Unaffected by age as it does not react with moisture in the atmosphere.

Thermal Bridging

It is a fundamental of heat transfer where a penetration of the insulation layer by a highly conductive or noninsulating material takes place in the separation between the interior (or conditioned space) and exterior environments of a building assembly (also known as the building enclosure, building envelope, or thermal envelope).

AEROGEL GLAZED WINDOW

OPENINGS,INSULATED ROOFINGS

Aerogel Illuminated structure

CONCLUSION

• The performances from the applications mentioned above

demonstrates that aerogel is such a material and by using it even if the

initial costs are over the costs of other traditional materials. amazing results

may be obtained in realizing of the primordial objective of lasting

development the passive house.

Thank you