Magnesial Lime

Lime obtained with chalk containing magnesie. The term dolomitic lime is also used.

Main Coating

In the case of a three layer coating, the main coating is the second layer. It contributes to ensure the smoothness of the support, but also the waterproofsness and isolation.

Molding

Constant profile, empty or in relief, realized in stone or mortar.

Moldings

Designate the whole ensemble of molded ornements.

Mortar

Mix of water, sand and binder aimed for all the masonry works.

Natural Earth

Mineral pigment, from a natural origin.

Natural Hydraulic Lime

Lime obtained through the calcination of an impur chalk (contening silicates or aluminates)

Ochre

Natural mineral pigment, the coloration is due to iron oxyde. We distinguish yellow and red ochre.

Oxide

Mineral pigment resulting from an industrial process.

Parement

Vertical face of the wall.

Patina

Very diluted lime milk, used for its transparency effects.

Pigments

Colored substances, non soluble. They color the surface on wich they are applied without penetrating the matter, in contrary of the dyeing.

Plaster

Binder obtained through the heating of gypsum. Semi-hydrate of calcium sulfate.

Portland

Name of a quarry in England where cement has been discovered.

Pozzolan

Material rich in alumin, silica, lime and iron, reacting with lime and water to form a stable hydrate that contributes to the hydraulic properties of the mortar formed. The name comes from the volcanic ashes extracted in the region of Pozzolan in Italy.

Quicklime

Material obtained through chalk calcination. His avidity for water gave it his name. In the case of a calcination with an impure chalk, we get calcium oxyde.

Rough-Hewn

See main coating.

Roughcast

Coating with a rough finish.

Sand

Fine aggregates where the sizes of grain doesn't exceeds 5 mm.

Silicate

Silice based body, contributing through the calcination of calcium carbonates to the hydraulic character of limes.

Slaked Aerial Lime

Slaked aerial lime used in the building department are lime formed with pure chalk who formed, through calcination and extinction, calcium hydroxides or lime hydrates.

Slaked Lime

After the calcination of lime, the extinction through water addition gives slaked lime. See Slaked aerial lime.

Stucco

Coating layer, plane or with relief, imitating marble, white or colored with pigments and composed from a mix of aerial lime and marble powder. One speaks of lime stucco.

Taking

Moment where the binder looses its plastic properties and where the process of hardening begins.

Taloche

Tool used to carry mortar during the application.

Underform

See main coating.

Water Drop

Holes under the bands, moldings, cornices, aiming at the formation of water drops.

Water Retainer

Adjuvant slowing the water evaporation of a mortar tempering.

Wetting (agent)

Adjuvant used to ease the mix of pigments in the lime milks, to increase the smoothness and plasticity of mortars.

Whitewash

Calcium carbonate, crushed chalk, used as a white pigment. The name "blanc de St-Jean" is often used.

Withdrawal

Diminution of the volume of mortar in the taking moment, mainly due to water evaporation.

Workability

Time during wich the mortar can be used, worked.