Variety and quality of asphalts produced from commercial West Siberian crude

Akhmetova, R. S.; Stepanova, N. G.; Evdokimova, L. V.; Chernobrivenko, A. I.

doi:10.1007/bf00749405

Cited by 3 publications

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“…Akhmetova and Glozman (1974) used the triangular diagram (asphaltene-hydrocarbon-resin) in choosing the blend proportions. The details related to various operations for blending PDA pitch and the significance of oxidation during the blending process with related experimental data were detailed by Akhmetova, Stepanova, Evdokimova, and Chernobrivenko (1979) and Pushmynstsev, Gun, Chernysheva, Gureev, and Efanova (1982). Allakhverdiev, Kuliev, and Samedova (1987) suggested that the quantity of heavy distillates in the mixture of reformulated asphalt be around 30-35% for better performance.…”

Section: Literature Backgroundmentioning

confidence: 99%

Influence of Asphaltenes on the Rheological Properties of Blended Paving Asphalts

Rajan

Selvavathi

Sairam

et al. 2010

Petroleum Science and Technology

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Some of the refineries in India produce asphalt by blending propane deasphalting (PDA) pitch and heavy extract. This investigation reports the rheological and chemical characterization of various blends made with PDA pitch and heavy extract. The main objective is to develop an understanding on the influence of asphaltene change on the changes in the rheological properties under all aged conditions. Three blend proportions were manufactured using three different crude sources, and all the blends were subjected to short-and long-term aging. All the blends were tested for steady shear, creep and recovery, and stress relaxation properties. A chemical composition analysis of all the blended asphalt samples was carried out under all three aging conditions. It was seen that the proportion of PDA pitch considerably controls the rheological properties and that the kinetics of short-term aging are completely different when compared to long-term aging for blended asphalt.

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Section: Literature Backgroundmentioning

confidence: 99%

Influence of Asphaltenes on the Rheological Properties of Blended Paving Asphalts

Rajan

Selvavathi

Sairam

et al. 2010

Petroleum Science and Technology

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“…In oxidation of vacuum resids from commercial West Siberian crude, the ductility of asphalts at 25°C is 70-95 cm for paving grades as a function of the degree of oxidation. As a consequence, commercial asphalt has no quality margin with respect to this index [12].…”

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Increasing the thermal stability of paving asphalts

Лихтерова

Durov

Nakipova

et al. 2008

Chem Technol Fuels Oils

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A comparative analysis of domestic and foreign standards and technical specifications for paving asphalts is reported. A LUKOIL -Nizhegorodnefteorgsintez OAO draft corporate standard (DCS) for viscous paving asphalts which totally agrees with the foreign specifications was developed. Data from a pilot-industrial run on manufacture of commercial BND asphalt that satisfies the requirements of the DCS and is characterized by elevated plasticity and thermal stability are reported. The compositions of the feedstock and commercial asphalt and the process conditions of oxidation of vacuum resid were refined.The modern paving industry imposes stiff requirements on all materials used in construction and maintenance of highways, including paving asphalts and other binder materials made from them. Despite the enormous amount of data published in the scientific and technical literature, the quality level of viscous paving asphalts and the list of quality indexes and validation of the standards for them are still being debated.The state of the roads in our country shows that the lifetime of newly constructed and overhauled road surfaces almost universally fails. According to the data from Voronezh Oil Refinery's RosDor SRI, important erosion and peeling begin in the first year of use, while the lifetime of surfaces abroad is 18 years. In addition, the problem of bringing the domestic standards into agreement with the foreign standards has still not been solved. There is no correlation between the requirements for asphalt concretes and the quality indexes included in the standards for asphalt, and problems related to their production technology require solution.The requirements in foreign standards for paving asphalts are generalized and the necessity of changing the domestic standards and bringing them into agreement with the requirements in the foreign standards is justified ____________________________________________________________________________________________________ LUKOIL -Nizhegorodnefteorgsintez OAO. Moscow State Academy of Precision Chemical Engineering.

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“…This also affected feedstock for asphalt production. The viscosity of the vacuum resids and asphalts decreased sharply in comparison to the viscosity of vacuum resids and asphalts from Romashkino or Volgograd crudes [46][47][48][49]. It was necessary to operatively make up for the shortage of oxidizing capacities for processing the previous assortment of asphalts.…”

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confidence: 99%

Asphalt production technology. From engineering art to science

Grudnikov

Ippolitov

Grudnikova

2004

Chem Technol Fuels Oils

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In the last third of the last century, important progress was made in developing the scientific basis for oxidized asphalt production technology. The classification of crude oils and mathematical model developed allow quantitatively predicting the basic parameters of asphalt production based on vacuum distillation and oxidation process using the reference properties of the crude oil. Key words: oxidized asphalt, prediction, classification of crude oils, mathematical model.The evolution of technology for production of any product usually passes through the stage of engineering art where decision-making is based on separate facts and is heuristic in character. Gradual accumulation of knowledge leads to generalizations that allow making decisions based on rigorous calculations. This collected knowledge, which allows quantitatively predicting the basic parameters of product production technology, can be called science.The results of development of domestic asphalt production technology, more precisely, its material implementation, over the last third of the 20 th century were generalized previously in [1]. The reasons for selecting this period of time were discussed there. The present article concerns the development of scientific views in asphalt technology in the same time period. We first analyzed the reviews in monographs published in the mainstream press and articles in the journals Khimiya i Tekhnologiya Topliv i Masel [Chemistry and Technology of Fuels and Oils] and Neftepererabotka i Neftekhimiya [Oil Refining and Petrochemistry] , since the most important events and facts would be reflected on the pages of these publications. We focused most attention on the developments that markedly influenced the development of the prognostic basis of the technology and thus confirmed the right to call it scientific. Many publications that do not consider approaches to the quantitative prediction of some parameters of a technology are not discussed based on the same criterion. Perhaps enough time has not yet passed for a reliable evaluation of such publications.The area of application of asphalts is primarily determined by their consistency. Determination of the degree of softness of asphalts is based on methods of testing that determine arbitrary characteristics; ductility, i.e., the capacity to be drawn into a thread; softening point; penetration, i.e., the depth of needle penetration in asphalt [2, 3].Such tests, although conducted by methods generally accepted in world practice, do not essentially differ from the methods of assessing quality used at the dawn of asphalt production -for example, by pressing with a fingernail.

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Variety and quality of asphalts produced from commercial West Siberian crude

Cited by 3 publications

References 0 publications

Influence of Asphaltenes on the Rheological Properties of Blended Paving Asphalts

Influence of Asphaltenes on the Rheological Properties of Blended Paving Asphalts

Increasing the thermal stability of paving asphalts

Asphalt production technology. From engineering art to science

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