Mortar Vs Grout | What Is Mortar and Grout | Type of Mortar and Grout | Difference Between Mortar and Grout

Mortar Vs Grout

What is Mortar?

The term mortar is used to indicate that a paste prepared by adding the required quantity of water into a mixture of binding material (cement or lime) and fine aggregate (sand).

The above two elements of mortar, namely, the binding material and fine aggregate, are sometimes referred into as the matrix and adulterant, respectively.

The matrix binds this particle of the adulterant. The durability, quality, and strength of mortar will mainly depend on the quantity and quality of the matrix.

The combined effect of the two components of mortar is that the mass can binds the bricks or stones firmly.

Also, read: Trapezoidal Footing Formula with Calculation

Classification/ Type of Mortar

The classification of mortars may be done in many ways, i.e., based on the binding agent, possessions of binding agent and aggregate, etc.

In general, Mortar are classified as follows:

  • Cement Mortar
  • Lime Mortar 
  • Lime-Cement Mortar
  • Special Mortar

Cement Mortar

Cement mortar consists of cement as binding material, sand into different proportions, and water.

It’s the strongest type of mortar and is therefore preferred to be used in the construction of structures subjected to heavy loading.

Lime Mortar 

Lime mortar can be lime and sand mortar, lime, and surkhi mortar, sand, lime, and surkhi mortar or lime and cinder mortar (also known as black mortar).

Lime used for mortar can be fat lime (quick or hydrated lime) or hydraulic lime.

Fat lime has a high calcium oxide content.

It’s hardening solely depends on the loss of water and absorption of carbon dioxide from this atmosphere and possible recrystallization in due course.

Hydrated lime is a dry powder obtained by treating quick lime with water enough to satisfy its chemical affinity for water under the conditions of its hydration.

Hydraulic lime contains small quantities of alumina and silica and/or iron oxide, which can be in chemical combination with a few of calcium oxide contents, giving a putty or mortar that has the property of setting and hardening underwater.

Slaked fat lime is used to prepare mortar for plastering, whereas hydraulic lime is used in preparing mortar for masonry construction.

Also, rad: Trapezoidal Footing Formula with Calculation

Lime-Cement Mortar

Lime Mortar

It’s also called composite mortar or gauged mortar. When lime mortar made from fat lime is desired to be improved with regard to its hydraulic properties, initial setting time and strength, cement is added into it.

Cement should be added only to that much quantity of lime mortar, which can be used within an hour after the addition of cement.

Special Mortar

Following are the few special Kinds of mortars based on the binding material or certain specific characteristics:

Mud mortar

  • Mud mortar,
  • Cement-clay mortar,
  • Light and heavy mortars,

Decorative mortar

  • Decorative mortars,
  • Air-entrained (plasticized) mortar,

Also, read: What Is Lintel | Type of Lintel

Test for Mortars

To test the quality of mortars, these can be subjected to several tests:

Crushing Strength 


Cohesiveness or Tensile Strength 

Test for Setting 

What is Grout?

Grout is used to filling pints between tiles and is selected with a compatible mortar.

Grout is either a portland cement-based mixture or a mixture of other compounds to enhance its performance or ease its installation.

The type and size of tile, service level, climatic conditions, tile spacing, and individual manufacturer’s recommendations are factors that should be considered when selecting grout.

Portland cement-based grout is a mixture of portland cement and sand (for floors) or lime (for walls) and is used for thickset installations.

Portland cement-based grouts include commercial portland cement grout, sand portland cement grout, dry set grout, and latex portland cement grout.

Grouts based on mixtures of other compounds include solid epoxy, furan, silicone, and mastic grouts. Mastic grout eliminates the need for mixing on-site.

  • Epoxy grout is a two- or three-part mixture (epoxy resin hardener with silica sand filler) that is highly resistant to chemicals and has great bond strength. This grout and furan grout are made for different chemical and solvent resistance
  • Furan resin grout is a two-part furan mixture (similar to loran mortar) that resists high temperatures and solvents
  • Silicone rubber grout is an elastomeric mixture of silicone rubber. It has high bond strength, is resistant to water and staining, and remains flexible under freezing conditions.

Silicon, urethane, and modified polyvinyl chloride are used in pre-grouted ceramic tile sheets.

Silicone grout should not be used on kitchen countertops or other food preparation surfaces unless it meets the requirements of FDA Regulation No. 21, CFE 177.2600. Joint widths are only guidelines.

Individual grout manufacturer’s products may vary. Consult the manufacturer’s instructions.

Joint width is only guidelines. Individual grout manufacturer’s products may vary. Consult the manufacturer’s instructions.

Some types of glazed ceramic tiles, polished marble, marble agglomerates, and granite can be permanently scratched or dam-aged when grouted with sanded grout formulas.

Do not use sanded grout or add sand to grout when grouting polished marble, marbled agglomerates, and ceramic wall tiles with soft glazes.

Check the tile or marble manufacturer’s literature and test grout on a separate sample area prior to grouting.

Some types of ceramic tiles and dimension stones may be permanently stained when grouted with pigmented grout of a contrasting color.

White grout is best suited for grouting white or light-colored marble or granite. Colored cementitious grouts may darken when wet.

Also, read: What Is Honeycomb In Concrete | Cause | Cure | Type of Grouting

Type of Grout

To test the quality of mortars, these can be subjected to several tests:

  • Dry-Set Grout
  • Latex Grout
  • Silicone Rubber Grout
  • Epoxy Grout
  • Furan Resin Grout

Dry-Set Grout

Dry-Set Grout

Dry-Set Grout is a prepared mixture of portland cement and sand, with additives to improve water retentivity.

Dry-set grout has the same properties as dry-set mortar and is suitable for grouting walls subject to ordinary use.

It eliminates soaking of tile, although dampening sometimes is desirable under very dry conditions.

Also, read: Difference Between Flexible Pavement and Rigid Pavement | What is Pavement | Type of Pavement

Latex Grout

Latex Grout

Latex grout is a mixture of one of the three preceding products, consisting mainly of portland cement with a latex additive to increase stain resistance and resilience of the joints.

Latex grout is suitable for installations subject to ordinary use.

It is less rigid and less water-permeable than sand-portland cement grout, allowing for more movement and greater exposure to moisture.

This grout, therefore, is particularly suitable for tub and shower areas.

Silicone Rubber Grout

Silicone Rubber Grout

Silicone rubber grout is an engineered elastomeric grout system for interior use employing a single-component nonslumping silicone rubber, which, upon curing, is resistant to staining, moisture, mildew, cracking, crazing, and shrinking.

It adheres tenaciously to ceramic tile, cures rapidly, and withstands exposure to moisture as well as subfreezing temperatures and hot, humid conditions.

Also, read: What Is Cement | Type of Cement

Epoxy Grout

Epoxy Grout

Epoxy grout is a two-part system consisting of an epoxy resin and a hardener.

It is made in several formulations, each intended for a specific ceramic tile.

It is highly stain-resistant and impervious and is used with epoxy mortar or epoxy adhesive.

Its use requires special skills and is usually expensive.

Epoxy grout is formulated without coarse fillers that might scratch glazed wall tile or mosaic tile.

It may be used on floors, walls, and counters subject to food staining.

It is also formulated with a coarse silica filler for use with quarry tile and pavers.

It is formulated for industrial and commercial installations where chemical resistance is of paramount importance.

It has excellent bonding characteristics.

Furan Resin Grout

Furan Resin Grout

Furan resin grout is a two-part grout consisting of furan resin and a hardener.

It is intended for use with quarry tile and quarry tile and pavers, mainly in industrial areas requiring a maximum of chemical resistance.

It is generally used in conjunction with furan mortar.

Also, read: What Is Workability of Concrete | Factors Affecting Workability | Test |Errors

Difference Between Mortar and Grout ( Mortar Vs Grout )

1Mortar paste use in Cement, sand, lime and waterGrout use in this material Cement, water and sand, epoxy, acrylic and polymer
2Water-Cement Ratio lessWater-Cement Ratio more
3The cement mortar is to act as a binder in brick or stone masonryThe grout is to act as a filler material in tilling work and cracks.
4Viscosity is low Viscosity is highly viscous
5In this mortar mix color of cementIn this grouting in material colors as per the requirement
6Type of Material.
Cement Mortar
Lime Mortar
Lime-Cement Mortar
Mud mortar,
Cement-clay mortar,
Light and heavy mortars,
Decorative mortars,
Air-entrained (plasticized) mortar,
Type of Material.
Dry-Set Grout
Latex Grout
Silicone Rubber Grout
Epoxy Grout
Furan Resin Grout
7This mortar requires curing for the hardening processThis grouting does not extra water
8Setting time isn't less than compared to groutSetting time isn't more than compared to mortar
9The mortar used in brick, stone, concrete block joint, also used in plastering workGrout as filler in cracks, Tiles grouting, strength of grout.
11It is more stiffer It is less stiffer


Grout vs Mortar

The main difference between mortar and grout is the amount of water in the mix. Grout must be made with enough water to make it pourable or pumpable but not with so much water that the grout components segregate. Mortar often is too stiff to flow around steel into small cavities or cores without leaving voids.

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