TYPES OF LIME

 Types Of Lime

1.       Fat Lime

Ø  It’s a rich lime or pure lime hence also known as high calcium lime.

Ø  It is manufactured from the purest quality of limestone.

Ø  Due to slacking, the volume of the fat lime increases expand by 2.5 times.

Ø  It contains 95 - 98% CaO.

Ø  Fat lime is about 6 % material insoluble in acid.

2.       Lean lime / Poor Lime

Ø  Contains 70 – 80% lime.

Ø  It has impurities of magnesia, silica, alumina & iron oxide.

Ø  It has very poor slacking property.

Ø  Do not dissolve completely in water.

Ø  Poor binding property.

1.       Hydraulic lime

Ø  Contains iron oxide, silica & 25% magnesium oxide along with 70 – 75 % lime.

Ø  Because of MgO, it has the binding property under water.

Ø  It provides a faster initial set & higher compression strength in more extreme conditions including underwater.

Ø  There are two basic types of hydraulic lime i.e natural & artificial.

Ø  Hydraulic limes gain strength over time hence providing flexibility and avoiding the need for expansion joints.