Terms that start with P
Paving mortar
A mortar laid under paving slabs or blocks.
Perlite
Lightweight granular material used for insulation purposes manufactured from naturally occurring volcanic rock expanded by heat to form a cellular structure. (EN ISO 9229).
Pigment
Colouring material to give colour to Mortar. It can be a dry powder or dispersed in water. (GA)
Plasticising admixture
Admixture which, without affecting the consistence, permits a reduction in water content of a mortar, or which, without affecting the water content, increases the flow, or which produces both effects simultaneously. (EN 13318)
Plugging mortar
A mortar to stop water leaks. Normally very fast setting.
Pointing mortar (or grout)
A mortar to point between masonry units or ceramic tiles. (EN 13888)
Polymer render/plaster
Render/plaster with polymer as the principle binder.
Polymer-based coating
A coloured polymer-based dispersion mortar for protection and decoration of vertical surfaces.
Polypropylene and Glass Fibres
These fibres are mixed with Render and Plaster Mortars, together with the mixing water, to increase the flexural and impact resistances. 0601801
Porosity
Ratio between the volume of pores within the mortar and the total volume. (EN 1015-7).
Pot-life (working time)
Period of time during which, after mixing, a mortar remains suitable for use. (EN 1015-9).
Pozzolan
Material often of volcanic origin, the first known example being from Pozzuoli, Mount Vesuvius, Italy. Romans used Pozzolanas to give hydraulic properties to Mortars. It was used in classical mortars and has given its name to the generic Pozzolans. (GA)
Prebatched mortar
Constituents batched in a factory, supplied to the building site and mixed there according to the manufacturer’s specification and conditions (e.g. multi silo mortar).
Premixed lime:sand mortar
Constituents batched and mixed in a factory, supplied to the building site where further constituents specified or provided by the factory are added (e.g. Cement).
Prescribed mortar
A mortar made in pre-determined proportions, the properties of which are assumed from the stated proportion of the constituents (Recipe concept). (EN 998).