Design and Research of Bituminous Compositions Modified by Rubber Brittle Waste

Cherkashina, Аnna; Lavrova, Inna; Лебедев, Владимир; Tykhomyrova, Tetiana

doi:10.4028/p-93135f

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…This observation is due to the free space, wave resistance mismatch, and decreased RAM efficiency in the material. The design of products from polymeric materials is a very difficult task in terms of creating new polymeric materials, because it requires appropriate technological and design information, for the developed wares, equipment for their manufacture, as well as different technological parameters of their processing [16,17,18]. So, when designing RAM, two main tasks must be solved: (i) To attain the apparent dielectric constant values which will provide the maximum possible absorption coefficient; (ii) To ensure the equality between material effective input resistance and the wave resistance of the environment in which the incident EMR propagates, i.e., to match the material with the external environment [1,2].…”

Section: Introductionmentioning

confidence: 99%

Study of Polymer Inorganic Composites for Electromagnetic Radiation Absorption Using Potassium Titanates

Lebedev,

Miroshnichenko,

Shestopalov

et al. 2023

MSF

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The article aims to investigate polymer inorganic composites for electromagnetic radiation absorption using potassium titanates. The selected polyamide 6 (durethane brand) and sodium polytitanate materials contain TiО2, K2СО3, and KCl received by charge sintering. Results showed that modification of polyamide 6 with sintering products in the form of a fine powder of potassium polytitanate with particle size 1-5 microns that contain the primary phase K2O × 2TiO2 with an admixture of a phase K2O × 4TiO2, which increased their strength properties. The optimal content of potassium polytitanate was over 10 % by mass. To fully ensure the reinforcing effect due to the filling of potassium polytitanate polyamide 6, it is necessary to use whiskers K2O × 6TiO2, which can be collected by the additional crystallization of the amorphous charge sintering product.

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Section: Introductionmentioning

confidence: 99%

Study of Polymer Inorganic Composites for Electromagnetic Radiation Absorption Using Potassium Titanates

Lebedev,

Miroshnichenko,

Shestopalov

et al. 2023

MSF

Self Cite

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“…Наведемо аналіз адгезійних властивостей бітумів, модифікованих смолою бурого вугілля, за методикою визначення зчеплення в'яжучого з поверхнею мінерального матеріалу (рис. [1][2][3][4].…”

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Study of Non-Fuel Application of Brown Coal Derivatives for Bitume Modification

Lebedev,

Miroshnichenko,

Lavrova

et al. 2023

ITE

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The article shows research into the non-fuel use of brown coal derivatives for the modification of bitumen. The work used petroleum road grade bitumen BND 60/90 with a flash point in an open crucible of 260 °C, a softening temperature (using the ring and ball method) of 48 °C, resin after lignite thermal destruction and rubber waste. and powder. Based on the fact that the most relevant technologies for the non-fuel use of brown coal concern areas aimed at obtaining wax, humane preparations, adsorbents, obtaining valuable derivatives in the form of resins, GR, etc., an assessment was made of the non-fuel use of brown coal derivatives for modification bitumen. Analysis of the experimental results showed that the studied quality indicators of the composition samples, which include waste rubber powder, have an increased complex of both thermophysical and physical-mechanical characteristics. This is obviously due to the fact that, as a result of thermal destruction of rubber powder, the swelling process occurs faster compared to crumb rubber with a size of 2.5–4.5 mm. However, the process of destruction and dispersion in both cases does not occur completely, of course, and the volume of edematous rubber particles contains resins and polyaromatic components that affect the value of both thermophysical and physical-mechanical characteristics. Thus, it has been established that the optimal composition for creating effective polymer-modified bitumens with an increased complex of thermo-physical and physical-mechanical characteristics is 40 % by weight of rubber powder and 5 % by weight. brown coal resins after thermal destruction. It is shown that the results of laboratory studies have proven the prospects of using brown coal tar after thermal destruction for the modification of road bitumen. Summarizing research into the direction of non-fuel use of brown coal derivatives in the form of liquid products – tar resins of brown coal after thermal destruction for the modification of bitumen materials, it should be noted that the results obtained are moderate in comparison with existing directions for the production of polymer-modified bitumens. Modification of bitumen with primary and secondary polymers makes it possible to significantly improve their adhesion and performance characteristics compared to brown coal resins after thermal destruction. The use of brown coal resins after thermal destruction is much less effective in improving the elasticity, heat resistance and reducing the fragility of bitumen compositions compared to the use of thermoplastic and thermoelastomer modifiers in the production of polymer-modified bitumens.

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Comparative analysis of the impact of synthetic additives and phosphatide concentrate on the adhesive properties of road petroleum bitumen

Lavrova,

Demidov,

Cherkashina

et al. 2023

Vopr. Khim. Khim. Tekhnol.

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The adhesive properties of brand BND 60/90 road bitumen with the oxidized phosphatide concentrate additive were studied. It was shown that the oxidized phosphatide increases the adhesive properties of bitumen brand BND 60/90. Oxidized phosphatide concentrate can be recommended as cost-effective alternative to expensive synthetic cationic surfactants, which are now widely used as adhesives for road bitumen. Based on the results of laboratory tests, the mathematical analysis of the obtained data was performed. Comparative graphs were plotted, and Pearson's correlation coefficients and the approximation reliability values were calculated. It was found that the optimal composition for creating effective bituminous compositions with an increased thermo-physical and adhesive characteristics is 0.6 wt.% of oxidized phosphatide concentrate.

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Design and Research of Bituminous Compositions Modified by Rubber Brittle Waste

Cited by 3 publications

References 10 publications

Study of Polymer Inorganic Composites for Electromagnetic Radiation Absorption Using Potassium Titanates

Study of Polymer Inorganic Composites for Electromagnetic Radiation Absorption Using Potassium Titanates

Study of Non-Fuel Application of Brown Coal Derivatives for Bitume Modification

Comparative analysis of the impact of synthetic additives and phosphatide concentrate on the adhesive properties of road petroleum bitumen

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