A Word on Aluminium
Aluminium, a silvery white soft light metal (Sp gr 27) is extracted from the mineral Bauxite. It is a reactive metal but forms a thin but strong film of oxide, which prevents it from further Oxidation. PIERRE BERTHIER first found bauxite ore near the town of "BEAUX" in 1821. Among the Aluminium production techniques the electrolytic technique developed by PAUL HEROULT & CHARLES MARTIN HALL in 1886 is the most convenient method & used around the world. In this technique, Bauxite is purified & dehydrated to give Alumin Al2O3. Aluminium can only be dissolved in MOLTEN CRYOLITE to form a solution that could be electrolysed in iron tanks lined with Carbon which also works as a cathode.
Various alloying elements are added to Aluminium in order to improve its strength, corrosion resistance or weld ability and machine ability. Alloy of Aluminium with Magnesium and Silicon is widely used in the Aluminium extrusion industry.
Aluminium is a highly environment friendly material. It is highly recyclable with 45-50 percent reconverted into other usable products.It can be converted into other usable products using just one-third the energy required to convert other materials such as vinyl, wood and steel. This makes it a truly green building material.
Aluminium's superior strength-to-weight ratio gives it a better structural strength advantage compared to other materials. This property makes it a preferred choice among architects for use in structural glazing & cladding applications in high rise buildings. Using Aluminium has paved the way for the construction industry to find innovative solutions to create futuristic architectural designs previously believed impossible.