It is of utmost importance that the mortar ingredients are mixed as thoroughly as possible. Two common methods adopted are manual mixing and mortar-mill mixing.
Manual mixing: This is done on a watertight platform made of masonry or in a tank of suitable dimensions. A spade is the main tool needed. Measured volumes of slaked lime and aggregate are placed on a platform or tank. They are first mixed in a dry state by turning with the help of a spade. Water is added gradually and mixing is continued simultaneously until a mortar of uniform consistency is obtained.
Mortar mill mixing: A mortar mill is a mechanical device for grinding the mortar ingredients in the presence of water and is run either by animals or by power. In the traditional method, animal-driven mortar mills are used.
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