What is Lime Mortar???

Introduction (What is Lime Mortar):

Lime mortar is ancient Indians first used mortar for temples, forts and historic structures.

Lime mortar is typically used as plastering, masonary (either stone or bricks) and as a binding material.

There are two types of lime is there,

  • Hydraulic lime Mortar
  • Fat lime Mortar

Hydraulic Lime Mortar:

  • In this mortar hydraulic lime and sand in 1:2 ratio is used in very damp conditions
  • Mostly it is suitable for waterlogged areas.

Fat Lime Mortar:

  • In this mortar, fat lime is used and the quantity of fat is lime is almost 2 to 3 times greater than sand requirements.
  • Mainly this type of mortar is used in dry work, where the high plasticity is required.
What is Lime Mortar

Definition (Lime Mortar):

  • Lime mortar is mortar in which lime (hydraulic lime or fat lime) is used as binding material in combination with sand and water.
  • Basically, fat lime and hydraulic lime is used in lime mortars.
  • Fat lime mortar is used commonly and for damp situations hydraulic lime mortar is used
  • Lime mortar is ancient type of mortar and widely used in historic structures along with stones.

Properties of Lime Mortar:

  • It is more plastic and workable when it is wet in condition.
  • It has good workability and working properties when it made from excessive calcium lime.
  • It also develops slow lateral strength for very long time.
  • It does not set by action of water loss due to absorption and evaporation.
  • Provides strength and strong surface if used in plastering.
  • It provides strong bond between the joints when used in masonary joints.


  • Lime mortar can be re worked for up to 24 hours as it has great setting time.
  • It reduces the wastage when used in silos structures.
  • It also reduces the movement in joints.
  • It possesses the constant prime quality and colour of mortar.
  • As it possesses constant colour, it enhances the masonary joints in various masonary.
  • It also acts as water shedding barrier when used in masonary.
  • This provides the breathable types of construction.
  • By the end of the finish of life, this mortar also permits masonary to be recycled.
  • It absorbs the CO2 while curing processes.
  • Makes use of much less energy to produce than cement.


  • Quick setting time of lime mortar has limitations on casting.
  • Lime mortar can not be repaired with cement mortar as it does not form bond between lime and cement mortar when it gets harden.
  • An excessive amount of initial chemical set ignores the importance of extended carbonation of the non-hydraulic component.
  • The danger that segregation occurs, whereby the cement separates from the lime as the mortar dries and hardens.
  • The use of cement leads the consumer to deal with gold lime mortars as it has been purely hydraulic lime or cement.
  • Ph of mortar drops about 8.6 when lime mortar get dried and harden.

Uses Of Lime Mortars:

The Lime mortar can be used as plastering, joinery and in masonary.

  • For Foundation Works: fat lime mortar can be used in all types of foundation work in dry sub grade – water table is 2.4 m below the foundations level.
  • For All Masonry Works: loading – 20 to 60 tonnes/m2 (light and medium loading)
    • Fat lime and hydraulic lime, both are suitable.
    • Lime mortar can be replaced by cement mortar.
    • To bind stones, bricks or concrete blocks together

Lime mortar cannot be applied when:

  • Sub grade soil is moist water table is within 2.4 m.
  • Heavy loading is expected.
  • Construction is massive and very thick.


  • Mortars with hydraulic lime should be used within 4 hours after mixing.
  • Lime mortars with surkhi should be used within 24 hours after mixing.
  • Composite (lime and cement) mortars should be used within 2 hours after mixing.
  • All lime mortar shall be kept wet after grinding. The workers who are to handle lime mortar should protect their skin by using oil, rubber gloves etc

  • Classification Of Mortars:

    Mortars are classified into following types depending on binding materials used, building materials, nature of applications and density of mortar. Classification Of Mortars: Classification Based on Types of Binding Material: Mortars are classified into following depending on binding materials used Read More …

  • 1. Mortar In Construction

    Building mortars are mixtures of sand and binding materials, usually used for making joints in stones and bricks. (Sometime for other purpose too) Definition: It is a mixture or homogenous paste obtained by mixing fine aggregates such as sand and Read More …

  • 4. Crushing test on Aggregates

    The Crushing test is used to test crushing strength of pavement materials. This test is very important test for road works as it specifies the crushing strength of aggregates. IS code: IS: 2386 Part IV (Method of test for Aggregates) Read More …

  • Rate Analysis for Colour Washing

    Rate Analysis for Colour Washing Item: Applying Colour Washing with lime  (three and more coats) to already plastered surface.  Assumptions: Surface area of wall: 10 sq. m. Rates: Labour: 8 Rs per sq. m. White lime :300 Rs per Quintal   Read More …

  • Rate Analysis for White Washing with lime:

    Rate Analysis for White Washing With Lime Item: Applying White Washing with lime  (three and more coats) to already plastered surface.  Assumptions: Surface area of wall: 10 sq. m. Rates: Labour: 5Rs per sq. m. White lime :300Rs per Quintal    Read More …

  • Rate Analysis for Plaster of Paris (POP)

    Rate Analysis for Plaster of Paris (POP) to interior wall about 2mm thick: Item: Applying Plaster of Paris about 2mm thickness to already plastered surface.  Assumptions: Surface area of wall: 10 sq. m. Rates: Labour: 40Rs per sq. m. POP:3Rs Read More …

Leave a Reply