manoj rami sagar desai. lime nameroll no. dhaval karkar14sa122 piyush zinzala14sa162 jeegar...
TRANSCRIPT
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BUILDING CONSTRUCTION
MANOJ RAMISAGAR DESAI
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LIME
NAME ROLL NO.
DHAVAL KARKAR 14SA122
PIYUSH ZINZALA 14SA162
JEEGAR VARIYA 14SA134
KEINS PRAJAPATI 14SA136
JAY PRAJAPATI 14SA133
MEHUL CHAUDHARY 14SA149
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It is a sedimentary rock It was formed mainly from sea shells It is the compound called calcium carbonate It is a useful raw materialLime is most commonly used material generally in
finishing the major construction
INTRODUCTION
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Varities of lime
Stone lime Magnesiam lime
Kankar lime Shell lime
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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
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Calcium oxide (quicklime) is produced industrially using a lime kiln
Limestone in
Hot air in
Kiln rotates to ensure that the limestone is mixed with the hot airAir + carbon dioxide
Lime out
calcium carbonateheat
calcium oxide + carbon dioxide
A thermal decomposition reaction
( Industrial production )
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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
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Adding water to quicklime
Calcium hydroxide solution is limewater which turns ‘milky’ with carbon dioxide.
We can write a word equation:
calcium oxide + water calcium hydroxide
CaO + H2O Ca(OH)2
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.
or in symbols
‘slaking’ lime
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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.
usage
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the uses of limestone
Buildings and roads
Glass (heat with sand and sodium carbonate)
Neutralise acidic soils and lakes
Cement (heat with clay)
Mortar (cement + water + sand)
Concrete (cement + sand + gravel + water)
CaCO3
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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?
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Limestone Quarrying – some disadvantages
An ‘eyesore’ in areas of the countryside
Noise from blasting
Dust etc. from lorries
Loss of habitat for wildlife
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Lime vs Cement(comparison)
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Crushed lime stone
• Massive lime stone
• Calcined lime stone
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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,
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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.
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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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Thank you