There are several types of lime used with cement and sand for laying mortar of bricks called quicklime which is a completely different material.
Lime is a product obtained by burning limestone, a raw material found in limestone hills or limestone in the old river bed, kankar found under the ground, or shells of marine animals
Lime or quicklime improves work efficiency but has a negligible effect on the strength of the mortar.
To make Portland cement, limestone is crushed into a fine powder and introduced into a rotary kiln.
Different types of lime used in construction:
The lime obtained by calcination of limestone are typed into three categories as follows:
Fat lime is also termed as pure lime or rich lime or white lime or high calcium lime which required in whitewashing and plastering wall.
Properties of fat lime:
- Fat lime is soluble in water.
- It hardens very slowly.
- Its colour is white.
- It has an excessive character of plasticity.
- It sets slowly within the presence of air.
The lime which sets underwater is called hydraulic lime or water lime.
It consists of clay and some amount of ferrous oxide, hydraulic lime can be used for ordinary masonry work, superior masonry work and damp places.
These types of lime lime is further classified into three categories:
- Feebly hydraulic lime.
- Moderately hydraulic lime.
- Eminently hydraulic lime.
Properties of hydraulic lime:
- It sets underwater.
- Feerly hydraulic lime slakes after few minutes.
- Moderately hydraulic lime slakes after one or two hours.
- Eminently hydraulic lime slakes with difficulty.
Poor lime types also called as lean lime or impure lime, it consists of more than 30% of clay with muddy colour.
These lime is required to prepare poor mortar which can be used for the inferior work.
Properties of poor lime:
- It slakes very slowly.
- It forms a thin paste with water.
- Also, it does not dissolve in water though it is frequently changed.
- It hardens very slowly.
- It has poor binding properties.
Also read: Lime Mortar, Fly ash & Lime Plaster
Uses of lime:
- These types of lime are used for the final coat in internal plaster work of wall and ceiling to obtain the smooth surface for the further process of painting.
- Also, it is commonly used in neeru finish work.
- It is used for making mortar which is further in masonry work.
- It is used for soil stabilization.
- When lime is blended with cement it provides mortar used in a place of the costly cement mortar.
- It’s used as a matrix for concrete and mortar.
- It may be as a flux within the metallurgical industry.
- It’s used within the manufacturing of glass.
Also read: Types of Mortar, Types of Aggregates & Types of Cement
These several types of lime are basic construction materials used mainly in the manufacture of lime mortar.