Types of Mortar

Basics in Building Construction 4(2+2)

Lesson 08 : Masonry

Types of Mortar

Mortar is made of

Mortar is required for cementation of brick or stone masonry.

It is required for covering exposed surface of wall with plaster or for pointing of brick or stone joints.

  1. Cement mortar
    Cement mortar is made up of cement, sand and water. Cement mortar has to be used up within one hour of mixing. Otherwise its setting property deteriorates and it becomes weak. The common types of cements used for preparing cement mortars are:
    1. Ordinary Portland cement
    2. Rapid hardening cement
    3. Blast furnace slag cement
    4. Portland pozzolzana cement
    5. Masonry or triy cement.

  2. Cement –lime mortar
    In cement – lime mortar 50 % of the quantity of cement in a mortar is replaced by equal volume of lime for sake of economy without detriment to the safety of a small building. It spreads more easily and produces a more plastic material. This type of mortar is workable and sets earlier.

  3. Lime-mortar
    Lime is mixed with sand in the same manner as that for cement, but mixing with lime has to be done days in advance of its use to allow time for ‘Souring’.The wet mix of lime mortar is stored to ‘sour’ for atleast two days for being used in masonry and for atleast three days for being used in plastering.

  4. Lime-mortar gauged with cement
    The mortar in which cement is included as an ingredient in addition to lime is known as gauged mortar or composite mortar. The rate of stiffening of lime mortar is improved by gauging the lime with cement.

  5. Mud mortar
    Mud mortar has been successfully used for brick masonry in walls of many small buildings even with R.C.C. roof. Mud mortar shall be made of good ‘brick-earth’ free from grass, roots, gravel, kankar etc. The earth shall not contain any efflorescent salts. Selected clay mixed with water shall be well kneaded and pulddled until a thoroughly uniform mortar of easily workable and satisfactory consistency is produced.
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Last modified: Thursday, 1 March 2012, 10:11 AM