Год выпуска: 2025
Год выпуска: 2025
Издательство: Стройиздат, Ленинградское отделение
Год выпуска: 1984
Количество страниц: 260 с.
Количество страниц: 10 с.
The article presents the data of the development of the technology of bitumen modification of mechanically activated organic and mineral supplements that provide a significant increase in strength and water resistance of asphalt.
Николаева, Л. А.
Дорожный асфальтобетон на основе модифицированного битумного вяжущего / Л. А. Николаева, О. Н. Буренина, С. Н. Попов ; Институт проблем нефти и газа СО РАН // Политематический сетевой электронный научный журнал Кубанского государственного аграрного университета. - 2013. - N 85. - С. 114-124.
Количество страниц: 13 с.
In contemporary material’s science, the development of high-strength composite materials derived from polymers represents a significant strategic focus. A promising method to enhance the mechanical properties of these materials involves the incorporation of fibrous fillers as modifiers within the polymer matrix, which markedly improves loadbearing capacity. This research investigates the effects of basalt and carbon fibers on the mechanical and tribological characteristics, and on the structural formation processes in ultra-high molecular weight polyethylene (UHMWPE). The fibrous fillers were introduced into the polymer matrix without prior modification at concentrations of 5, 10, and 20 weight percent. Notably, composites containing 20 weight percent carbon fiber exhibited the most pronounced enhancement in elastic modulus, achieving an impressive increase of 66 %. Additionally, a significant reduction in the coefficient of friction was observed, with a decrease of 65 % relative to the unmodified polymer. Furthermore, the wear rate was found to decrease by 23 %. The addition of both carbon and basalt fibers into UHMWPE led to substantial improvements in tensile strength, with increases of 37 % and 28 %, respectively. Analysis of the friction surfaces of the composites through infrared spectroscopy indicated that neither type of fiber influenced the tribochemical processes during wear. The morphological examination of the friction surfaces suggested that carbon fiber possesses a comparative advantage over basalt, contributing to orientation effects and the formation of a wear-resistant layer. The materials developed in this study hold potential applications in the production of antifriction components, particularly for highly loaded sliding bearing elements in bridge structures.
Разработка композиционных материалов на основе СВМПЭ и углеродного и базальтового волокон / С. Н. Данилова, А. А. Охлопкова, А. В. Оконешникова ; Северо-Восточный федеральный университет им. М. К. Аммосова // Природные ресурсы Арктики и Субарктики. - 2024. - N 4, Т. 29. - C. 661-674. - DOI: 10.31242/2618-9712-2024-29-4-661-674
DOI: 10.31242/2618-9712-2024-29-4-661-674
Количество страниц: 10 с.
- Математика. Естественные науки > Физика,
- Прикладные науки. Медицина. Ветеринария. Техника. Сельское хозяйство > Строительство. Строительные материалы. Строительно-монтажные работы,
- НАУКА ЯКУТИИ > ПРИКЛАДНЫЕ НАУКИ. МЕДИЦИНА. ТЕХНИКА. СЕЛЬСКОЕ ХОЗЯЙСТВО > Строительство. Строительные материалы. Строительно-монтажные работы,
- НАУКА ЯКУТИИ > МАТЕМАТИКА. ЕСТЕСТВЕННЫЕ НАУКИ > Физика.
The present study outlines the synthesis of carbon that include graphene flakes. The production process employed rapid Joule heating of a mixture consisting of finely dispersed polypropylene powder and carbon black in a 1:1 ratio. An experimental model of the installation was developed and constructed, based on a capacitor bank with a total capacitance of 32 mF and an inductor with a nominal value of 24 mH for production purposes. A solution was prepared that included a colloidal dispersion of epoxy resins, an amine hardener in a mixture of deionized water and ethyl alcohol in a ratio of 4:0.6:10, along with 1 wt. % of the resulting carbon powder and carbon black, to be used as an impregnating compound for glass fibers. The estimated synthesis temperature reached up to 2200 °C, with a duration of approximately 32 ms. Studies of Raman spectra and optical density in the UV range indicate that the synthesized carbon powders contain graphene flakes with lateral dimensions of up to 13 nm. The results of elemental analysis reveal a significant increase in the carbon atom content in the impregnated fiber compared to the original glass fiber. Electrical measurements of the temperature dependence of the current-voltage (C-V) characteristics demonstrated the presence of electrical conductivity at low temperatures, corresponding to a resistance of up to 8 MΩ/sq. In the future, electrical conductivity may be enhanced by increasing the discharge power. The developed configuration for fast Joule heating has the potential to be integrated into the field of efficient recycling of plastic waste. The resulting carbon powders can serve as modifying additives for glass fiber used in the production of fiberglass concretes.
Получение быстрым джоулевым нагревом углеродных графенсодержащих порошков и их применение в качестве модификаторов для стекловолокна / А. Р. Прокопьев, Е. Д. Васильева, Н. Н. Лоскин, Д. Н. Попов ; Академия наук Республики Саха (Якутия), Северо-Восточный федеральный университет им. М. К. Аммосова // Природные ресурсы Арктики и Субарктики. - 2024.- N 4, Т. 29. - C. 651-660. - DOI: 10.31242/2618-9712-2024-29-4-651-660
DOI: 10.31242/2618-9712-2024-29-4-651-660
Год выпуска: 2024
Количество страниц: 1 с.
Год выпуска: 2025
Количество страниц: 1 с.