Glossary

Aerated Autoclave Concrete, also commonly called cellular concrete or “Aircrete"

Reduction of the pH of soil, waterways and lakes.

A granular material used in construction. The most common natural aggregates of mineral origin are sand, gravel and crushed rock. (< 95% CaCO3)

Lime and dolomite products that are used in agriculture to neutralize the soil acidity

Calcic or dolomitic limes are called air limes because they combine and harden with the carbon dioxide present in the air

May be a quick or hydrated lime, whose physical characteristics make it suitable for structural purposes. Usually used as binder for building mortar.

Heating material to release volatile constituents or change the crystal structure.

Crystalline mineral consisting of calcium carbonates.

Is obtained when calcium oxide is mixed, or 'slaked' with water. Also called slaked lime, Ca(OH)2.

Burnt dolomite (CaO-MgO).

Quick lime (CaO), produced by calcination of limestone and/or dlomitic rock.

European Committee for Standardisation. See www.cen.eu

A quick or hydrated lime that is used for one or more of the many chemical and industrial applications. Usually it possesses relatively high chemical purity.

Pigment for coating paper, usually supplied as slurry. Mixture of very bright, clean particles, such as pulverized limestone or kaolin.

A highly sintered form of dolomitic quicklime which is used primarily as a basic refractory.

Sinterized quicklime which does not slake readily under normal conditions.

Type of rock which consists mainly of the mineral dolomite (10-50%), commonly called dolomite. (CaCO3-MgCO3)

Limestone that includes small amounts of the mineral dolomite.

Flue Gas Desulfurisation. The processes employed for the removal of gaseous sulfur dioxide from boiler exhaust gas at coal-fired electricity generating plants.

Fine ground limestone or dolomite stone. Used as a filler in asphalt, plastics, paint and paper, for example.

Flocculation is a process where a solute comes out of solution in the form of floc or flakes. Flocculation and sedimentation are widely employed in the purification of drinking water as well as sewage treatment and treatment of other industrial wastewater streams.

Fluxing lime is lump or pebble quicklime used for fluxing in steel manufacture, or the term may be applied more broadly to include fluxing of nonferrous metals and glass. It is a type of chemical lime.

Ground Calcium Carbonate.

The common name for the mineral consisting primarily of fully hydrated calcium sulfate,CaSO4 x 2H2O or calcium sulfate dihydrate. Gypsum occurs naturally in many areas, and is produced by some wet Flue Gas Desulfurization (FGD) processes.

Slaked lime,calcium hydroxide - Ca(OH)2.

A chemically impure form of lime with hydraulic properties of varying extent, that possesses appreciable amounts of silica, alumina and usually some iron, chemically combined with much of the lime. Usually used as binder for plaster and mortar.

Spreading of pulverized limestone used to combat acidification in lakes.

A mixture of lime (calcium hydroxide) in water which is used for the production of lime plasters, renders, mortars etc.

Calcinated dolomite stone with a carbon content similar to that of normal roast limestone.

Sedimentary rock composed of the mineral calcite (calcium carbonate or CaCO3).

Lump quicklime usually refers to products with a top size above 2.5 cm.

A limestone containing apprciable amounts of magnesium, at least 90% calcite and no more than 10% dolomite.

Also called ground limestone with a top size < 300µ.

A suspension of calcium hydroxide particles in water. These particles give it the milky aspect.

A mix of one or more inorganic or organic binders, aggregates, fillers, additives and/or admixtures.

Elimination of excess H+ (or OH-) ions by adding base (or acid).

Precipitated Calcium Carbonate, also known as purified, refined or synthetic calcium carbonate.

Pebble quicklime usually refers to screened products with a top size in the range of 1,5 to 6cm.

Pozzolanic is used to describe materials, which contain reactive silica, and which, when mixed with quicklime and water, set to a hard mass.

Lime with a top size < 3mm.

Lime product consisting mainly of CaO. Produced from limestone from which carbon dioxide has been removed by heating.

Measure of the rate at which it reacts with water. ‘Moderate', ‘medium', and 'low' reactivity are used as broad classifications for quicklimes.

Durable coating of lime and aggregate, which provides a protective covering to the walls of a building.

Calcium silicate bricks produced by autoclaving a mixture of sand and lime.

Any of several forms of chemical/physical devices that remove sulfur compounds formed during coal combustion and especially from coal-fired power plants.

Dead burnt lime.

Refers to the solid or liquid impurities removed from molten metal in the metallurgical processing.

Hydrated lime

Any solid or semisolid or liquid waste generated from a municipal, commercial, or industrial wastewater treatment plant water supply treatment plant or air pollution control facility (wet scrubbers) or any other such waste having similar characteristics and effect.

Particles in suspension in water.

A quicklime calcined at relatively low temperature. It is characterised by its high porosity and chemical reactivity.

The term applied in some combustion systems, to the chemical compounds that are added to the gas side of the steam generator to reduce (sorb) emissions. For example, limestone is used in fluidized-bed steam generators to reduce sulfur dioxide emissions.

Form of plaster for coating walls.

It binds Sulphur in flue gases to form solid phases that can be removed.

A bright, nearly waterproof lime plaster which can be used on the inside of buildings and on the outside.

Normal hydrated lime.

Also called special hydrated lime, is an ASTM designation to distinguish a structural hydrated from a normal hydrated lime.

Synonymous with milk of lime, a dilute lime hydrate suspension.