Primary aggregate can be defined as fine, granular or lump stone produced from crushed rock. It may be classified according to it’s geology and source, for example limestone or granite and particle size. Physical properties such as hardness and size classification, and sometimes chemical properties determine suitability for end use. It may be incorporated in the construction of buildings, civil engineering projects and production of concrete or simply laid as decorative product.

Agricultural lime
Agricultural lime is a term used for limestone, dolomitic limestone, quicklime or hydrated lime products that are applied to soil in order to neutralise soil acidity and increase yield. In addition, the essential mineral for plant growth calcium and in the case of dolomite, calcium and magnesium, are released into the soil structure.

Architectural stone
Highly finished limestone blocks and polished panels used as a decorative building material by architects and builders.

Adhesives & sealants
Limestone is an important component of ceramic tile adhesives, grouts and joint fillers

Animal and pet feeds
Calcium carbonate is the major source of calcium, essential for healthy teeth and bones, in dietary supplements and also acts as an essential gastric antacid. It is widely used component of poultry, pig, equine and dairy rations in addition to domestic pet food.

Coarse aggregate
Coarse aggregate may be described as that fraction of aggregate in general terms that is greater than 4mm in size.

Crusher-run aggregate
Crusher-run aggregate is the unscreened product from a single crushing operation.

Limestone is an important filler for strengthening the latex backing of rugs and carpets. Latex-based carpet backing is the coating on the reverse side of a woven carpet that holds the fibres in place and provides a degree of resiliency and stiffness

In low-fire bodies, limestone is sometimes added in small amounts as a filler to reduce fired shrinkage. It is also included in porous earthenware body recipes to prevent moisture expansion (causes glazes to craze). Limestone is also used as a flux in ceramic glazes.

Dolomitic limes
Dolomitic limes are limes mainly consisting of calcium oxide and magnesium oxide (see calcined dolomite), calcium hydroxide and magnesium hydroxide.

Dolomitic limestone
Dolomitic limestone, sometimes referred to as magnesium limestone, is generally regarded as limestone that in addition to the major chemical component, calcium carbonate, contains a fairly small percentage of magnesium carbonate

Filler is an inert material, with a nominal particle size of less than 75 microns, for example limestone dust, which is used to fill voids within the matrix of another material and may also improve the physical properties of the resultant product.

Fine aggregate
Fine aggregate is that portion of aggregate that nominally passes a 4mm mesh.

Fine lime
Fine lime generally refers to screened products with a top size below 0.6 cm.

Grading normally refers to the particle size distribution of a product. For example, an aggregate may be described as 4-20mm. Specification data sheets are available that give precise sizing information relating to a product.

Ground crushed lime
Ground Crushed Lime, commonly known as GCL, is an undried limestone aggregate with a top size less than 5mm and high fines content, suitable for spreading on fields as fertiliser by farmers.

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