1. Building mortars are mixtures used for the jointing of bricks, stones, blocks, etc.
  2. Mortar may be defined as a paste (capable of setting and hardening) obtained by adding water to a mixture of
    fine aggregates such as sand and binding material, e.g., clay, gypsum, lime or cement or their
    combinations.
  3. The pyramids of Egypt have been built with clay-gypsum, gypsum-lime and lime mortars. Indians have used lime mortar for monumental structures such as Taj Mahal and forts.
  4. In the years that followed, if was found that burning limestone with clayey substance produced hydraulic lime of high water-resistant properties. Lime with a still higher content of clay led to the manufacture of Roman cement.
  5. In 1824 Portland cement appeared; today it is considered to be the strongest binding material for making mortar.
  6. The mortar composition is designed by the volume or weight of material in 1 m3 of mortar
    or by the relative amount of materials with the amount of binding material taken as unity.
  7. For simple mortars composed of one kind of binding material and containing no mineral admixtures
    (e.g., cement mortar), the composition will be designated, say 1:4, i.e., one part (by weight or
    volume ) of binding material (cement) and 4 parts of sand.

m3

 

m2

m1

 

 

 

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