Glass [autosaved]

Build

ing C

onst

ructi

on

Tanvay VartakAjay Cherimal

Adit MistryKavya PushparajBhavik Radadiya

Building

Construction

GLASS

DEFINITION

• Amorphous, Hard, Brittle, Transparent Or Translucent Substance

• Super Cooled Liquid Of Infinite Viscosity

• No Definite Melting Point

• Fusing A Mixture Of A Number Of Metallic Silicates Or Borates Of Sodium, Potassium, Calcium And Lead.

PROPERTIES• Transparency

• U value

• Strength

• Workability

• Recyclable

Glass house by Philip Johnson

Preparation of glassPilkington process• Sand, Calcium Oxide And Sodium Carbonate• Heated In A Gas Fired Furnace• Quartz Sand : 2,300 Degrees Celsius • Sodium Carbonate Reduces The Temp. To 1,500 Degree C• Molten Glass Formed• Mixture Is Floated On Molten Tin To Form Glass• Glass Is Set To Cool• Annealing

History of Glass• Obsidian and fulgurite

• Glass blowing discovered in 1st century in Europe

• 7th century Anglo Saxon glass

• Stain in gothic renaissance and baroque architecture from the 11th century

• Pilkington and Bickerstaff introduced float glass process in 1958.

GLASS IN ARCHITECTURE • Facades

• Structural element

• Sky lights, atriums

• glazing doors and windows

• Decoration

• partition wall

• cabinets, show cases, shop front

TYPES• Tinted Glass

• Laminated Glass

• Fusion Glass

• Mirrors

• Float Glass

• Stained Glass

• Beveled Glass

• Figured Glass

• Toughened Glass

TINTED GLASS • Windows In Buildings, Homes, And Cars

• Privacy

LAMINATED GLASS• Holds Together When Shattered.

• Held By An Interlayer, Typically Of Polyvinyl Butyral Between Its Two Or More Layers

• High Strength Prevents The Glass From Breaking Up Into Large Sharp Pieces

FUSION GLASS• Consists Mainly Of Silica

• Generally Used To Create Art And Jewellery,

MIRRORS

• Good Specular Reflection

• Smooth Enough To Form An Image.

• Used For Personal Grooming, Decoration And Architecture

FLOAT GLASS

• Sheet Of Glass Made By Floating Molten Glass On A Bed Of Molten Tin.

• Uniform Thickness And Very Flat Surfaces.

• Modern Windows

STAINED GLASS

• Made By Adding Metallic Salts During Its Manufacture

• Used For Making Stained Glass Windows

• Small Pieces Of Glass Are Arranged To Form Patterns

BEVELED GLASS• Bevels Act As Prisms In The Sunlight

• Creates An Interesting Colour Diffraction Highlighting The Glasswork

FIGURED GLASS

• Plate Or Sheet Glass Having A Pattern Rolled Onto One Side Of The Surface.

• Also Called As Rolled Plate Glass

• Kitchen Cabinets

TOUGHENED GLASS • processed by chemical treatments.

• increased strength

• shatter into small fragments when broken

• strong, enhanced thermal resistance, breaks into small cuboid fragments

• less likely to cause injury

ADVANTAGES1. Adds Beauty To The Building2. Fulfils The Architectural View For External Decoration3. Saves The Space Inside The Building4. Glass Cladding5. Sense Of Openness And Harmonious.6. Thermal Insulation, Water Proofing And Energy Conservation.7.Bad Conductor Of Heat Thus Saves Energy In Air Conditioning Of Building.

DISADVANTAGES1.Costly Material2. Use In Hilly Area And Desert May Cause More Maintenance Cost.3. Glass Is Also Unsafe For Earthquake Proven Area.

4. Energy Extensive Process

Thank You