V. V. Fedorov

Modification of Paving Asphalts with Sulfur

Sulfur dissolved in oil components of asphalt is a binder, filler, and chemical co-reagent at once. The structure of sulfur-extended asphalt depends on its formula and heating temperature. Road pavement based on sulfur-extended asphalt demonstrates higher durability as compared to that with the conventional binders.

Relationship between Group Composition of Tars and Asphalts Produced from Various Crude Oils and Their Performance Characteristics

A comparative study is made of the thermodynamic stability of asphalts produced from various crude oils differing in their density, in the content of sulfur, resin, and asphaltene, and in the yield of top paraffins (fraction <350°C). The relationship between the group composition of tars and asphalts produced from these oils and their performance characteristics is analyzed.

Prediction of the Quality of Petroleum Tars and Bitumens by Infrared Spectroscopic and X-ray Diffraction Methods

The degree of aromaticity of petroleum tars, bitumens, and their fractions is characterized by infrared spectroscopy and X-ray diffraction.

Modification of Paving Asphalts with an Elastoplastic

BND 60/90 and BND 89/130 paving asphalts were modified by addition of DST-30 elastoplastic and petroleum plasticizers. Their performance at temperatures from -(32-35) to +(90-95)°C was examined in comparison with that of commercial unmodified asphalts, which are efficient at temperatures from -(23-27) to +(44-50)°C.

Trace contaminants in tars and bitumens from west-siberian and yarega crude oils

The trace contaminant levels were determined for ten tar samples and six bitumen samples available from Kirishi, Yaroslavl, and Ukhta refineries, as well as from Neste (Finland).

Relationship between the Performance of Tars and Bitumens from Commercial West-Siberian Crude Oil and Their Structural-Group Composition

The structural-group compositions of polar and nonpolar components of malthenes from tars of West-Siberian crude oil and of quality bitumen BDUS 70/100 and substandard bitumen BDUS 60/90 produced from these tars are compared.

Modified Paving Bitumens Based on Tar and Petroleum Polymeric Resins

Modification of tar with petroleum polymeric resins yields paving-grade bitumens with enhanced cohesion. With respect to the heat resistance and other parameters, these bitumens meet the requirements of GOST (State Standard) for BND 90/130 paving bitumens.

Distribution of Elements among Fractions of Petroleum Tars and Bitumens from West Siberian Industrial Oil

Distribution of C, H, N, S, and O among polar and nonpolar components of malthenes and asphaltenes of initial tars and quality and substandard bitumens obtained from them is studied by chemical and elemental analyses and 1H and 13C NMR.

Softeners for Rubber and Corrosion-Resistant Coatings Based on Shale and Petroleum Raw Materials

A broad spectrum of softeners for vulcanized rubber and corrosion-resistant materials are obtained by mechanical mixing of kerogen shale (Kerogen-701) with commercial products of petroleum refining and shale chemistry such as oil tar, bitumens BND 90/130 and G, softener A-10, residue of atmospheric distillation of crude shale oil boiling above 350°C, and also by thermal treatment of the indicated mixtures at 360-400°C.