Building mortars are mixtures, used for the joining of bricks and stones.
Definition:- A paste obtained by adding water to a mixture of fine aggregates such as sand and binding material.
The pyramids of the have been built with clay-gypsum, gypsum-lime and lime mortar.
The safety, strength and durability of resulting wall or any structure depends upon quality of mortar used as a binding medium.
Functions of mortar:-
- It provides force or cohesion between the structural unit.
- It acts as a medium for distributing the forces throughout the structure uniformly.
- Additional strength and resistance against the rain penetration and other such weathering agencies.
- In stone or brick masonry, it fills up empty joints, a thin liquid mortar used for such purposes is termed as Grout.
Qualities or properties of mortar:-
- The mortar mix should be workable- easily transported to the place of application.
- It should develop adequate strength in tension, compression and bond for the work for it is used.
- It should capable of retaining sufficient water during it’s application.
- It should be sufficiently plastic easily placed on the bed is construction in the form of thin, smooth and uniform layer.
- It should be durable and strong in itself on drying and hardening at the same time. It should not react in anyway with construction units.
- It should set and garden quickly construction could be done with speed.
- It should not develop any cracks on drying and should be able to maintain their appearance for quite long period.
- It should capable of developing the designed stresses.
- It should be economical to make without compromising on any of the qualities.
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