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Mortar and grout are both used in the field of construction which are cement based product. Despite both being cement based products, they have different properties, different uses and serve different purposes. The major difference found in the mortar and grout is its fluidity property.

In the below article we have shed light on the major differences between mortar and grout. 

Mortar

Mortar is a mixture of cement, sand and water made into a thick paste that is used to bind two surfaces with each other. It is majorly used in the building projects as a binding material between stones, concrete and bricks.

Fig 1: Mortar being used as binding material in brick masonry.

Grout 

Grout is a highly viscous material which is used as a filler to
fill spaces or the joints between ceramic or stone tiles. Grout is a binder, but it is certainly not an adhesive and the tiles stay in place because of the mortar below them and not because of the grout.

Fig 2: Grout being used as filler material in tilling.

Difference Between Mortar and Grout

The differences between mortar and grout are mentioned below in detail :

SNPropertiesMortarGrout
1MaterialCement, sand, lime and waterCement, water and sand, epoxy, acrylic and polymer
2Water-Cement RatioLessMore
3Primary FunctionThe primary function of the cement mortar is to act as a binder in brick or stone masonryThe primary function of the grout is to act as a filler material in tilling work and cracks.
4StiffnessStifferLess stiff
5WorkabilityIt sticks well on a trowel and the workability is more.As the water content is more, it is difficult to handle it with trowel or other tools.
6ViscosityLowHighly viscous
7ColorUsually takes the color of cementComes in various colors as per the requirement
8TypesCement Mortar
Lime Mortar
Surki Mortar
Gauged Mortar
Mud Mortar
Sanded grout
Un-sanded or wall grout
Epoxy grout
Furan grout
Acrylic grout
9Porosity Non-porousQuite porous, holds waters in it even after hardening.
10CuringMortar needs curing for hardening processGrout does not need extra water for curing; the initial quantity provided is enough for hardening
11Setting TimeSetting time is more when compared to groutSetting time is less when compared to Mortar
12ApplicationUsed as a bonding material in stone, concrete and brick masonry.
Used in plastering works to hide the joints and to improve appearance.
Used as a filler in tiles and cracks.
Grouting is done to avoid cracks or bedding planes in weak area or ground.
Grouting is used for strengthing of ground for dam foundation.

Read More: Differences Between Coarse-Grained and Fine-Grained Soil

About Fasi Ur RahmanVerified

Fasi is a Civil Engineer associated with Tumkur Smart City Project. He is the author, editor and partner at theconstructor.org