Fat Lime or high calcium lime or white lime. It slakes vigorously and its volume is increased to about 2 to 2.5 times that of quick lime. This lime is used for various purposes as white washing, plastering of walls, as lime mortar with sand for pointing in masonry work, as a lime mortar with surkhi for thick masonry walls and in foundations.
Quick lime : It is also known as caustic lime. It is obtained by calcination (i.e. heating to redness) of comparatively pure lime stone. It is amorphous in nature, highly caustic and possesses great affinity to moisture.
Slaked lime : It is also known as hydrate of lime. It is obtained by slaking (i.e. chemical combination of quick lime with water) of quick lime. It has got the tendency of absorbing carbonic acid from the atmosphere in presence of water.
Hydraulic lime : This lime contains clay and some amount of ferrous oxide. It sets under water and hence also known as water lime. The mortar and lime concrete prepared from this lime is very useful for construction under water or in damp places and also used in masonry work.