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Products

Mineral filler

In 2017, the public limited liability company Dolomitas, with support from EU structural funds, opened a new, advanced dolomite mineral filler production site capable of producing products meeting customers’ needs and standard requirements. The filler produced in the site was certified by the public liability company Problematika in accordance with the requirements of harmonised standard EN 13043:2002, EN 13043:2002/AC:2004.

The scope of application of dolomite mineral filler is sufficiently broad and ranges from industry (production of dry construction mixtures, concrete, bitumen roofing, and glass) to agriculture (production of feed additives, premixes, and fertilisers and soil improvement).

However, its main use is road construction. Here, mineral filler is an important material because it strongly influences the properties of the asphalt mixture and is an important element of the mixture forming the structure of asphalt concrete. Mineral powder has the largest surface area, even larger than that of sand: it accounts for up to 90-95% of the total surface area of all mineral materials constituting the asphalt concrete mixture. Dolomite mineral powder extends the interaction surface of particles, improves the thermal resistance of bitumen and asphalt concrete, reduces the thermal expansion of the binding material, reduces plastic strain during vehicle braking, and increases the density of the mixture.

In the production of building mixtures, mineral filler (made from dolomite or limestone) can account for several to several dozen percentage points in the composition of the product, depending on the manufacturing technology and intended purpose of the product.

Dolomite mineral filler can also be used in the production of fertilisers. Finally, because of its properties, it is a wonderful magnesium-rich fertiliser and a means of soil improvement. Dolomite mineral filler is particularly suitable for organic farming. It is also used in the production of feed additives and premixes.

Like dolomite aggregates, mineral filler must meet certain standard requirements, including those for granulometric composition, density, porosity, swelling, bitumen content indicator, humidity, uniformity, and hydrophobicity. The certified laboratory of AB Dolomitas ensures that these requirements are complied with.

Mineral filler
(microfiller)

Certified by the public liability company Problematika
Certified according to LST EN 12620:2003+A1:2008 Concrete fillers.

Dolomitas certificate:
http://www.problematika.lt/wp-content/uploads/2018/05/Isduoti-VGK-sertifikatai-2018-04-27.pdf