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Click on the first letter of the word in the alphabetic keypad below to jump to the relevant section of the list. Scroll up or down to find the reference you require.

Abrasion resistance

The resistance of a hardened mortar surface to wear by mechanical action.(ISO 7784-2) (EN 12808-2 Grouts for tiles)


A finely divided inorganic material that may be added to mortar in order to improve or achieve special properties.(EN 13318, EN 998)

Adhesion failure

Failure occuring at the interface between mortar and substrate or associated material. The value equals the adhesive strength.

Adhesion strength (bond strength)

The maximum adhesion strength of adhesive applied onto a substrate, which can be determined by shear or tensile strength test.


The maximum time interval during which adjustment is possible without significant loss of final strength. (MS ISO 13007 Tile adhesives)


Organic or inorganic material added in small quantity to modify the properties of the mortar/grout in the fresh and/or hardened state.(EN 13318)

Cementitious adhesive

A mixture of hydraulic binder(s), aggregates, polymeric agents and other organic additives.(MS ISO 13007)

Cohesion Failure

Failure occuring within the adhesive layer (where the strength of the adhesive is lower than that of the substrate), or failure occuring in the substrate (where the strength of the adhesive is higher than that of the substrate).

Dispersion Adhesive

A polymer based adhesive.(MS ISO 13007)

Failure Strength

Maximum value of a mortar failure determined by exerting a force in flexure at three points.(MS ISO 13007)

Open Time

The maximum time interval for finishing after application of adhesive.(MS ISO 13007)

Port Life (Working Time)

Period of time during which, after mixing, a mixed adhesive remains suitable for use.(MS ISO 13007).

Reaction Rasin Adhesive

A two part resin based mortar used for bonding materials. (MS ISO 13007)


Layer of mortar laid in situ, directly onto a base, bonded or unbonded, or onto an intermediate layer or insulation layer to produce a defined level, to carry the final flooring to provide a wearing surface.

Setting Time

The time after which the mortar begins to harden. After this time the mortar is normally stable in the presence of water.

Shear Strength

Strength determined by a force applied parallel to the mortar surface.(MS ISO 13007)

Shelf Life

The time of storage under stated conditions during which a mortar may be expected to retain its intended working properties.(MS ISO 13007)


Immediate surface to which the adhesive is to be applied.

Tensile Strength

Resistance of a mortar surface, to resist a tensile force, applied perpendicular to the mortar surface.(MS ISO 13007)

Transverse Deformation

Deflection recorded at the centre of a mortar, when a beam is subjected to three point loading.(MS ISO 13007)