BUILDING CONSTRUCTION MANOJ RAMI SAGAR DESAI

LIME NAME ROLL NO. DHAVAL KARKAR 14SA122 PIYUSH ZINZALA 14SA162 JEEGAR VARIYA 14SA134 KEINS PRAJAPATI 14SA136 JAY PRAJAPATI 14SA133 MEHUL CHAUDHARY 14SA149

INTRODUCTION It is a sedimentary rock It was formed mainly from sea shells It is the compound called calcium carbonate It is a useful raw material Lime is most commonly used material generally in finishing the major construction

Varities of lime Stone lime Magnesiam lime Kankar lime Shell lime

Physical & Chemical properties Appearance white powder Acidity (pKa) 12.4 Basicity (pKb) 2.37 Density 2.211 g/cm3 , solid Odor odorless Formula CaO System Isometric

A thermal decomposition reaction ( Industrial production ) Calcium oxide (quicklime) is produced industrially using a lime kiln Kiln rotates to ensure that the limestone is mixed with the hot air Air + carbon dioxide Hot air in Limestone in Lime out heat calcium carbonate calcium oxide + carbon dioxide A thermal decomposition reaction ( Industrial production )

Market avaibility (world wide cost) 72 – 164 $ per metric tonnes India is a major producer in world of lime…. 4.5 – 10 rupee per kg in india

Adding water to quicklime ‘slaking’ lime When water is added to quicklime (calcium oxide), the reaction produces much heat and slaked lime (calcium hydroxide) is formed. A reaction that produces heat is called an exothermic reaction. We can write a word equation: calcium oxide + water calcium hydroxide or in symbols CaO + H2O Ca(OH)2 Calcium hydroxide solution is limewater which turns ‘milky’ with carbon dioxide.

usage Lime is uses in the treatment of water and waste water. It is used in the manufacture of glass,refractory,sand lime bricks and paints. It is used as lime morter for mansonry work of buildings. It is used for plastering and white washing of buildings. It is used as lime concreat to make water proof stuctures.

the uses of limestone Buildings and roads Mortar (cement + water + sand) Cement (heat with clay) Glass (heat with sand and sodium carbonate) CaCO3 Neutralise acidic soils and lakes Concrete (cement + sand + gravel + water)

Limestone quarrying provides the raw materials for making many important substances such as glass and cement etc. It also provides employment for people and benefits the local economy. But what exactly are the disadvantages?

Limestone Quarrying – some disadvantages An ‘eyesore’ in areas of the countryside Noise from blasting Loss of habitat for wildlife Dust etc. from lorries

Lime vs Cement (comparison)

Crushed lime stone Massive lime stone Calcined lime stone

Plastering Plasterwork refers to construction or ornamentation done with plaster, such as a layer of plaster on an interior or exterior wall structure, or plaster decorative moldings on ceilings or walls. This is also sometimes called pargeting. The process of creating plasterwork, called plastering,

Soda lime glass relatively inexpensive chemically stable reasonably hard extremely workable Because it is capable of being re-softened and re-melted numerous times, it is ideal for glass recycling.

Lime softening ( water treatment ) Lime softening, also known as Clark's process , is a type of water treatment used for water softening which uses the addition of limewater (calcium hydroxide) to remove hardness (calcium and magnesium) ions by precipitation. The process is also effective at removing a variety of microorganisms and dissolved organic matter by flocculation.

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