What are the properties of good mortar?

Adhesion or Bond: It should be capable of developing good adhesion with the building units such as bricks, stones etc.

Durability: It should be able to resist freeze thaw and other environmental conditions.

Resisting penetration of rainwater: The porosity should be tight enough to resist wind driven rains and not shrink allowing the bond between the mortar and masonry unit to separate.

Workability: It should spread easily without the addition of too much water and retain the water to allow for a good bond.

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