Introduction to Lime Mortar

Updated: Nov 30, 2019

What is lime mortar?

Lime mortar is an effective adhesive used to bind building blocks together and fill the space between them. Lime Mortar consists of lime, sand, water, and some distinctive herbals (Jute, Indian Gallnut, jaggery, Aloe Vera, Lady Finger, and Egg) in precise ratios. The early Egyptians invented lime mortar 6000 years ago. They used this vital chemical to build pyramids and buildings as binder and plaster. Lime mortar becomes solid when it sets, consequential in a rigid aggregate structure. After the invention of Portland cement, lime mortar usage declined rapidly.

Types of lime mortar

  • Quick lime mortar

  • Hydrated lime mortar

  • Hydraulic lime mortar

Quick lime mortar

Lime mortar has been made by heating limestone (Calcium Carbonate) in high temperatures through Kiln, a process known as calcinations, which results in Quick lime or calcium oxide.

CaCO₃ + Heat ―> CaO + CO₂

Hydrated lime mortar

Hydrated lime mortar (Calcium Hydroxide, or Ca[OH]₂) has been produced by reacting quick lime with adequate water to turn oxides into hydroxides. It has seemed to powder composed of water and sand.

Hydraulic lime mortar

A unique form of limestone is used to make hydraulic lime mortar. The limestone is mixed with clay then headed in a kiln to high temperature. This operation eliminates too much of the moisture content from the lime and also produces mineral by-products known as silicates. The remaining limestone and silicates are combined to form hydraulic lime mortar. We can use hydraulic lime mortar in many applications where other lime mortar products would fail.

Composition of mortar

Ancient mortars are typically made from a mixture of fine aggregate sand, limes, and water in precise ratios (three parts of sand, 1 part of limes, and ¾ part of water). The mixture must not be too wet.

Functions of lime mortar

  1. To bind together the construction bricks, blocks or stones accurately to provide strength to the complete structure.

  2. To pattern a homogenous mass of formation to resist all the weights coming over it without disintegration.

  3. To cater to the weather resisting i.e., a strong layer between the diverse courses of masonry in the structure.

  4. To retain coarse aggregate together in any concrete to form a solid mass. The lime mortar used in concrete is word express as a matrix.

  5. To make pointing and plastering to the structure. The lime mortar applies for plastering is known as plaster.

  6. To close empty joints in brick and stone masonry. The lime mortar used for such purposes is a thin liquid lime mortar which is known as grout and the procedure is known as grouting.

Type of Charis lime mixed mortars

Charis lime mixed mortar is made with a unique mixture of limestone, river sand, water, and a few distinctive herbals which give it extra strength to structure. Charis provides five types of mortar for construction namely Ekbara, Dobara, Cehbara, Surki type 1, and Surki type 2. Our lime mortars are made with different ingredients and ratios to accomplish diverse types of construction works.

Advantages of Charis lime mixed mortar

  1. Charis lime mixed mortar inevitable and good adhesion for the building units such as bricks, stones, etc.,

  2. It is capable of developing the designed stresses

  3. It is adequate to resist the penetration of rainwater

  4. It is available at a compatible price

  5. It provides longstanding durable

  6. It is easily workable

  7. It does not affect the durability of materials with which it comes into contact

  8. It is set quickly so that hasten in construction may be achieved.

  9. The joints created by mortar should not grow cracks and they should be able to preserve their appearance for a sufficiently long period.

  10. While reside in lime mortar building human life span increased which is scientifically confirmed.

  11. Lime mortar building keeps the building colder inside than outside of the environment.

  12. Lime mortar building easily endures for 1000 years without any physical or chemical damages.

Kindly contact ( ) us about the renovation of the ancient lime mortar building or construct a new lime mortar building.

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