The role of mineral powder in road construction
The length of Russia's highways is enormous, but their quality remains at a low level. This is due to the constant growth of traffic and the inadequate quality of materials used for construction. Hardly 20% of the total roadway of the country can be called compliant with European standards.The reasons for scientific research in the field of mineral powdersresearch of recent years have shown that in order to improve the quality and strength of asphalt concrete mixtures, active introduction of mineral powders is necessary. This organic mineral composite improves the physico-chemical parameters of the mixture many times. Together with bitumen, the material has an astringent effect, forming a thin and durable surface film that increases the protective characteristics of asphalt.Studies have shown that carbonate rocks, which are a rare resource in Russia, are optimal for the production of mineral powders. As a result, many asphalt concrete plants are experiencing a shortage of such an important element as mineral powder. To eliminate the deficit, a number of additional studies were conducted and similar properties were found in finely dispersed waste from metallurgical industries, in cement dust. The result also pleased scientists with the fact that these components are a source of environmental pollution, and now these negative components can be used usefully.The ground waste is combined with organic mineral powder and used in the production of asphalt concrete coatings. The internal porosity of the powder granules provides astringent properties and allows to improve such indicators of the road surface as resistance to cracks and deformations, an increase in density and elasticity.Additional research in the field of mineral powders The shortage of raw materials for the production of mineral powders has led to a number of scientific research in this field. As a result, similar properties were found of perlite powder. It has a similar effect on the structure of bitumen.For this type of mineral component, the same proportions are characteristic as for carbonate powders. During the research, it was found that the quality of asphalt concrete mixtures remains at a high quality level. One of the most important properties of perlite mineral powder is its low thermal conductivity, which significantly increases the resistance of the pavement to heat. This is a very significant factor in regions with high summer temperatures, where asphalt “floats” and deforms under the weight of transport. The use of the material prolongs the service life of the coating by an average of 5-10 years.Another advantage of using pearlite fillers was that during operation at extreme temperatures, asphalt concrete demonstrated self-healing properties. That is, the astringent surfactants, upon cooling, return the coating to its original structure. Due to this property, the material began to be added to mineral mixtures, which enrich asphalt with high operational requirements.Despite the achievement of high results in the production of asphalt concrete coatings, scientists continue to research to achieve even more obvious results. Lightning Roulette est une variante bien connue de la roulette classique. Il s'agit du véritable jeu en direct d'Evolution Gaming, avec le potentiel de récompenses importantes. Avec le jeu Lightning Roulette vous pouvez expérimenter le frisson des multiplicateurs accrus et gagner jusqu'à 500 fois votre mise. Un croupier plus vrai que nature est prêt à guider le jeu dans le studio. Six jetons distincts, dont la valeur varie de 0,20 € à 100 €, sont affichés en bas de l'écran. En cliquant sur l'un d'eux, vous pouvez sélectionner la valeur de la mise que vous souhaitez appliquer.
