1. Glass
NAME:
Nada Al salimi
Nasra AL SAAIDI

2. What is glass?
Glass is made from liquid sand. You can make glass by heating ordinary sand (which is mostly made of silicon dioxide) until it melts and turns into a liquid.

3. Is glass a solid... or a liquid?
The answer is both—and neither! There are widely differing opinions on how to refer to materials such as glass that seem to be a bit like liquids in some ways and a bit like solids in others.

4. Physical and chemical :Properties of Glass
Glass is made up of sand, soda ash and limestone substances. 1 It is a hard material that is normally
breakable and transparent.
Foamed or cellular glass is used as rigid.Glass fibers are used intextiles and for material reinforcenent.Also, used for acoustical and thermal insulation.Glass block is used to control light transmission , glare and solar radiation.
Glass , however, is used most commonly to glaze the window, sash, and sky light openings of
building.
Physical and chemical :Properties of Glass

5. THE THREE MAJOR TYPES OF FLAT GLASS:
float glass:
It is vsed in making canopies, shop fronts, glass blocks, railing partitions.
Plate glass:
Is used for display cases.
Sheet glass:
Is used in glazing.
THE THREE MAJOR TYPES OF FLAT GLASS:

6. OTHER TYPES OF GLASS,,, Annealed glass Heat- strengthened glass
Tempered glass
Laminated glass
Wired glass
Patterned glass
Obscure glass
Spandrel glass
OTHER TYPES OF GLASS,,,

7. Tinted or heat- absorbing glass.
Insulating glass:
Is a glass unit consisting of two or more sheets of glass.
Tinted or heat- absorbing glass.
Has a chemical a admixture to absorb a portion of the radiant heat and visible light that strike it.
Reflective glass has a thin:
Translucent metallic coating to reflect a portion of the light and radiant hat that stick it.
Low emissivity(low-a) glass
Transmits visible light while celectively reflecting the longer wave lengths of radiant heat.

8. SPECIAL USES FOR GLASS:
Glass has many applications both internal and external that play a vital role in the function and design of a building.
Below is a list of some of the many uses of how glass is applied in the building fabric.
SPECIAL USES FOR GLASS:

9. Important Properties of Glass:
1. It absorbs, refracts or transmits light. It can be made transparent or translucent.
2. It can take excellent polish.
3. It is an excellent electrical insulator.
4. It is strong and brittle.
5. It can be blown, drawn or pressed.
6. It is not affected by atmosphere.
7. It has excellent resistance to chemicals.
8. It is available in various beautiful colors.
9. With the advancement in technology, it is possible to make glass lighter than cork or stronger than steel.
10. Glass panes can be cleaned easily.
Important Properties of Glass:

10. SOLAR ENERGY TRANSMISSION REDUCED (35% TO 75%)
VISIBLE LIGHT TRANSMISSION REDUCED ( 32% TO 72%).

13. THE END