GLASS, PROPERTIES OF GLASS, TYPES AND USES OF GLASS, COLOURED GLASS,ADVANTAGES AND DISADVANTAGES vedio link https://youtu.be/6_8OIg0WDPQ

2. CONTENT
 GLASS
 Engineering Properties of Glass
 Types of Glass and their Uses
 Advantages & Disadvantages

3. GLASS
GLASS IS A HARD SUBSTANCE WHICH MAY BE TRANSPARENT OR
TRANSLUCENT AND BRITTLE. THE FUSION PROCESS USED TO
MANUFACTURE GLASSES. IN THIS PROCESS, SAND IS FUSED WITH
LIME, SODA, AND SOME OTHER ADMIXTURES AND THEN COOLED
RAPIDLY. GLASSES USED IN CONSTRUCTION PURPOSES AND
ARCHITECTURAL PURPOSES IN ENGINEERING.

4. Engineering Properties of Glass
 Transparency
 Strength
 Workability
 Transmittance
 U value
 Recycling property

5. Engineering Properties of Glass
 Transparency of Glass
Transparency is the main property of glass which allows the vision of the outside
world through it. The transparency of glass can be from both sides or from one
side only. In one side transparency, glass behaves like a mirror from the other
side.
 Strength of Glass
The strength of glass depends on the modulus of rupture value of glass. In
general glass is a brittle material but by adding admixtures and laminates we can
make it as more strong.
 Workability of Glass
A glass can be molded into any shape, or it can be blown during melting. So,
workability of glass is a superior property.

6. Engineering Properties of Glass
 Transmittance
The visible fraction of light that passing through glass is the property of visible
transmittance.
 U value of Glass
U value represents the amount of heat transferred through glass. If a glass is
said to be insulated unit then it should have lower u value.
 Recycle Property of Glass
Any glass can be 100% recyclable. It can also be used as raw material in
construction industry.

7. Types of Glass and their Uses
 Float Glass
Float glass manufactured from sodium silicate and calcium silicate so, it is also
called as soda-lime glass. It is clear and flat, so it causes glare. Thickness of
the float glass is available from 2mm to 20mm, and its weight range from 6 to
36 kg/m2. The application of float glass includes shop fronts, public places, etc.
 Shatterproof Glass
Shatterproof glass is used for windows, skylights, floors, etc. Some type of
plastic polyvinyl butyral is added in its making process. So, it cannot form
sharp-edged pieces when it breaks.
 Laminated Glass
Laminated glass is the combination of layers of ordinary glass. So, it has more
weight than a normal glass. It has more thickness and is Uv proof and
soundproof. These are used for aquariums, bridges, etc.

8. Types of Glass and their Uses
 Extra Clean Glass
Extra clean glass has two unique properties, photocatalytic and hydrophilic.
Because of these properties, it acts as stain proof and gives a beautiful
appearance. Maintenance is also easy.
 Chromatic Glass
Chromatic glass is used in ICU’s, meeting rooms etc. it can control the
transparent efficiency of glass and protects the interior from daylight.
 Tinted Glass
Tinted glass is nothing but colored glass. A color producing ingredients is mixed
to the normal glass mix to produce colored glass which does not affect other
properties of glass.

9. Different Types of Ions Used to
Produce Various Colors in
Glasses
Coloring ion Color
Iron oxide Green
Sulphur Blue
Manganese dioxide Black
Cobalt Blue
Chromium Dark green
Titanium Yellowish brown
Uranium Yellow

10. Advantages & Disadvantages
Advantages Disadvantages
Can be made in different sizes and
objects
An expensive material
Can be coloured or colourless Breaks easily
Does not rust When broken, the pieces may
be sharp
Waterproof easily-Melts in high
temperatures