Research on nature of petroleum bitumen interaction with components of complex modifier

Статья посвящена анализу и изучению различных способов получения нефтяных битумов и улучшения адгезионных свойств в различных минеральных материалах. На примере Астраханского газоперерабатывающего завода показана эффективность добавления присадок - азот-, серосодержащих веществ, элементной серы и др. для улучшения адгезионных свойств битумов к минеральным материалам. Проведен анализ воздействия перепада температур в летнее и зимнее время на вяжущие свойства битумов. Рассмотрен способ предварительной отгонки летучих компонентов из нефтей, что приводит к уменьшению содержания парафинонафтеновых углеводородов и улучшению качества получаемых битумов. В статье также приведены результаты экспериментальных исследований влияния окисления кислородом воздуха, повышения температуры процесса на пластичность битумов. Эффективность окисления битумов зависит от величины поверхности контакта между жидкой и газовой фазой. Ускорение процесса окисления достигается в 6-7 раз при хорошем перемешивании реагирующих фаз. The article also presents the results of experimental studies of the effect of oxidation with atmospheric oxygen, an increase in the process temperature on the plasticity of bitumen. The efficiency of bitumen oxidation depends on the size of the contact surface between the liquid and gas phases. Acceleration of the oxidation process is achieved 6-7 times with good mixing of the reacting phases.The article is devoted to the analysis and study of various methods of obtaining petroleum bitumen and improving the adhesion properties in various mineral materials. Using the example of the Astrakhan gas processing plant, the effectiveness of the addition of additives - nitrogen-, sulfur-containing substances, elemental sulfur, etc. - to improve the adhesion properties of bitumen to mineral materials is shown. The analysis of the effect of temperature differences in summer and winter on the binding properties of bitumen is carried out. A method for preliminary stripping of volatile components from oils is considered, which leads to a decrease in the content of paraffin-naphthenic hydrocarbons and an improvement in the quality of the obtained bitumen.

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Polymer-Bitumen Binders Compositions Selection by Using the Experimental Planning Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.887.504 ◽

2021 ◽

Vol 887 ◽

pp. 504-510

Author(s):

V.D. Galdina ◽

N.S. Galdin

Keyword(s):

Operating Conditions ◽

Planning Method ◽

Regression Equations ◽

Experimental Planning ◽

Petroleum Bitumen ◽

Styrene Butadiene Styrene ◽

Technical Properties ◽

And Performance ◽

Styrene Butadiene ◽

Butadiene Styrene

The paper presents the studies on the compositions selection and properties of polymer-bitumen binders obtained using the viscous petroleum bitumen, styrene-butadiene-styrene polymer and plasticizer according to the experimental planning method. Regression equations of the polymer-bitumen binders processing and performance properties, which make it possible to optimize the compositions and predict their properties taking into account the operating conditions, were obtained. Polymer-bitumen binders in comparison with the properties of viscous road bitumen have the increased indicators of heat resistance, crack toughness, ductility and elasticity. To obtain the adequate mathematical model, the experimental data were processed, compositions were optimized and dependence diagrams were constructed by using the Maple software package. The software for a personal computer including the algorithm and program for selecting the polymer-bitumen binders has been developed. When using the software it is possible to automate the calculation of the polymer-bitumen binders compositions with a given set of technical properties.

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Utilization of coir fibre as an asphalt modifier

Progress in Rubber Plastics and Recycling Technology ◽

10.1177/1477760618795996 ◽

2019 ◽

Vol 35 (2) ◽

pp. 59-74

Author(s):

Rean Maharaj ◽

Rehana Ali ◽

Dimitri Ramlochan ◽

Nazim Mohamed

Keyword(s):

Rheological Properties ◽

Waste Disposal ◽

Complex Modulus ◽

Elastic Solid ◽

Optimum Concentration ◽

Coconut Husk ◽

Coir Fibre ◽

Attractive Option ◽

Petroleum Bitumen ◽

Coconut Fibre

The influence of added coir (coconut) fibre of various lengths (from 2.5 mm to 10 mm) and dosages (up to 8 wt%) on the rheological properties of Trinidad Lake Asphalt (TLA) and Trinidad Petroleum Bitumen (TPB) was evaluated by measuring changes in the phase angle, δ (measure of the elasticity) and the complex modulus, G* (measure of the degree of stiffness). Results indicated that for both TLA and TPB, the highest values of G* (stiffest) and the lowest values of δ (most elastic) were observed for blends containing 2.5-mm coir fibre lengths for added coir concentrations of 6% and 8%, respectively. When compared to the unmodified TLA, the addition of 6 wt% of 2.5-mm coir fibre resulted in the largest significant increase in G* (7.3 times) as well as a significant decrease in δ (from 49.3° to 19.8°), representing a significant stiffening and increased elasticity of the modified blend. For TPB, the optimum concentration of added coir fibre occurred after the addition of 6 wt% of the 2.5-mm coir fibre, which resulted in the largest significant increase in G* of 5.4 times (stiffening) as well as a significant decrease in δ from 86.2° to 47.4° (increased elasticity as the material transformed from an almost viscous liquid to a semi-elastic solid) when compared to the unmodified pure TPB. The utilization of coir fibre for the rheological enhancement of Trinidad asphaltic materials can also provide an environmentally attractive option for solving the waste disposal issues associated with the dumping of waste coconut husk.

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Influence of natural additives and those synthesized by the Fischer-Tropsch method on the properties of petroleum bitumen and quality of floated asphalt

Coke and Chemistry ◽

10.3103/s1068364x11010066 ◽

2011 ◽

Vol 54 (1) ◽

pp. 26-31 ◽

Cited By ~ 11

Author(s):

A. M. Syroezhko ◽

M. A. Baranov ◽

S. N. Ivanov ◽

N. V. Maidanova

Keyword(s):

Fischer Tropsch ◽

Petroleum Bitumen ◽

Natural Additives

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Rheological Characteristics Evaluation of Bitumen Composites Containing Rock Asphalt and Diatomite

Applied Sciences ◽

10.3390/app9051023 ◽

2019 ◽

Vol 9 (5) ◽

pp. 1023 ◽

Cited By ~ 8

Author(s):

Wentong Huang ◽

Duanyi Wang ◽

Peiyong He ◽

Xiang Long ◽

Bing Tong ◽

...

Keyword(s):

Electron Microscope ◽

Performance Improvement ◽

Dynamic Shear Modulus ◽

Slight Reduction ◽

Rheological Characteristics ◽

Dynamic Shear ◽

Frequency Sweep ◽

Petroleum Bitumen ◽

Potential Impact ◽

Scanning Electron

Previous studies have showed that rock asphalt (RA) or diatomite were used to modify the petroleum bitumen. This paper presents the findings from a study conducted to evaluate the potential impact of RA and diatomite on the rheological characteristics of bitumen composites. RA and diatomite with three different dosages were added into the petroleum bitumen: 18% RA, 13% RA+7% diatomite, and 16% RA+9% diatomite by weight. The rheological characteristics of the RA and diatomite modified bitumens were evaluated in this study. The tests conducted included temperature sweep and frequency sweep tests with a dynamic shear rheometer (DSR), a Brookfield rotation viscosity test, and a scanning electron microscope test. The research showed that the addition of RA and diatomite to petroleum bitumen considerably increased the apparent viscosity, dynamic shear modulus, and rutting resistance in bitumen specimens. However, the DSR test indicated a slight reduction in the fatigue performance of composites made of RA and diatomite modified bitumens. Overall, RA and diatomite are good modifiers for petroleum bitumen for a performance improvement.

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