What is Lime | types of lime | properties of lime | advantages of lime

LIME

In this article we discussed the following points

1. what is lime 
2. types of lime
3. properties of lime 
4. advantages of lime 
5. Applications of lime 

what is lime ?

Lime is a building material obtained from the calicination of limestone

Ingredients in lime 

clay

silica 

magnesium carbonate

sulphate

Types of lime

 Fat lime

  It  is obtained from burning of limestone (seashell).

 It has 95% CaO &5% impurity (silica).

 due to heavy amount of  Cao, it is known as rich lime, pure lime or white lime.

When it is mixed with water & after slaking process. It expands its volume to 2.
2.5 times, so known as fat lime

CaCO3----->> CaO + CO2(gas)
 CaO + CO2--- --> CaCO3(ppt)


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Properties of lime

1). it is used in white whish preparation because it do not contribute in strength

2). it is soluble in water

3). it gives white appearance

hydraulic lime  {Ca(OH)2 }

Hydraulic lime is achieved from burning of kankar in which 5-30% impurity is present which gives light yellow appearance

 During slaking lime, it do not expand its volume,

Advantages

1) used in making of mortar.

2), because of no expansion in volume, it gives strength

poor lime 

it is obtained from granular limestone in which impurity percentage is more than

30%.

 It do not contribute in strength & gloves yellow color on surface


mortar making with hydraulic lime has an initial setting time is 100-120min and final setting time is 16-48 hrs.

if lime mortar use in brick masonry, for strength purpose the proportion is 1:2.

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Applications of lime 

• It is used for treatment of water.
• It is used for ornamental works(i.e, for decorative purpose).
• It is used for stabilisation of soil .
• It can be used in brick and stone masanory.
• It is used for manufacturing of glass .
• It is used in white washing .