Raw materials

RAW MATERIALS

             Main constituent components used in the production of concrete mixtures and solutions are raw materials harvested from certified producers that have introduced operating systems for manufacturing quality control:

cement – CEM І 52.5 R, cement CEM ІІІ A-S 42,5N SR sulphate resisting, produced by Devnya Cement AD, the general suitability is established in accordance with EN 197-1;

faction 4/11.2 and faction 11.2/22.4 produced in the quarry “Lyulyak” of “Patinzheneringstroy-T“AD, the general suitability is established in accordance with EN 12620;

sand for concrete production from the quarry “Sadovo“ and „Vetrino” of „Escana” AD, the general suitability is established in accordance with EN 12620;

sand for concrete production from the quarry Silistra of „Polaris 8” EOOD, the general suitability is established in accordance with EN 12620;

chemical additives for concrete mixtures and solutions, produced by Mapei – Italy, BSR – United Kingdom и Aydos – Turkey, delivered to the production site by the company “ Tenzor – VSR“ EOOD;

the general suitability is established in accordance with EN 934-2. The choice of a suitable plasticizer for concrete is determined by weather conditions, specification of concrete mixtures or specific customer requirements.