Modification of petroleum bitumen with mechanochemically activated schungite of the Koksu deposit
DOI:
https://doi.org/10.18321/cpc537Keywords:
битум, модификация, шунгит, механохимическая активация, измельчение.Abstract
The paper presents the results of experiments on the use of shungite rocks from the Koksu deposit after mechanochemical activation as a modifying additive to improve the physical and mechanical characteristics of oil road bitumen. Samples of shungite brand “Taurit” shale and carbonate origin with a particle size of 1 mm and 20 microns are used. Superfine samples of shungite with a particle size of 5 μm were obtained by mechanochemical activation. Modification of bitumen with shungite samples led to a decrease in the depth of penetration of the needle and extensibility, an increase in the softening temperature and adhesive ability of bitumen. The positive effect of mechanochemically activated shungite on the physical and mechanical properties of bitumen is explained by the change in the structure of shungite as a result of grinding. The optimal modifier was a sample of shungite of carbonate origin in the amount of 0.5 wt.% after mechanochemical activation. A favorable effect on the characteristics of bitumen allows the use of natural raw material - shungite after mechanochemical activation as a filler for bituminous binders and asphalt concrete mixtures based on them.
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