Polyfunctional Modifiers for Bitumen and Bituminous Materials with High Performance

Abstract

Over the last decade increase in capacity and the intensity of vehicular traffic has increased manifoldly, including heavy trucks, super singles, and higher tire pressures, resulting in significant increase of dynamic loads on the road surface which in turn lead to high quality requirements for bitumen in order to avoid premature wear and failure of asphalt concrete pavements. One of the possibilities to increase the quality of bitumen is to use special additives and modifiers that can provide a high adhesion to mineral filler and inhibit the aging and degradation processes in the asphalt coating. To achieve this, in the present study composite modifiers based on bisimidazolines derivatives were synthesized. The developed polyfunctional modifier (PFM) of complex action provides enhanced thermal stability, significantly improves the adhesion between bitumen binder and aggregates, and also improves the physical-mechanical properties of the asphalt concrete. Based on the test results it is recommended to use the synthesized samples of the PFM additive with complex action in asphalt mixtures for road paving.

Development of Surface-Modified Metal Additives With a Minimum Carbon Footprint for Paint Coatings

“…Описанный подход получения дисперсных Fe-материалов обеспечивает уменьшение в де сятки раз удельной эмиссии углекислого газа до уровня 0,03-0,05 т СОг/т Fe, по сравнению с тра диционными металлургическими процессами (0,5-1,9 т СОг/т Fe) [27]. По мнению авторов дан ной работы, доказанная низкоуглеродная характе ристика получаемых Fe-материалов, в совокупно сти с высокими водоотталкивающими свойствами поверхности формируют основу для их экспери ментальных исследований, как перспективных Таблица 1 -Химический состав Fe-продукта ТГС, полученного восстановлением ОСК в среде газовой смеси ЭГС и Н2 Наблюдаемая деградация защитных свойств при введении дисперсных наполнителей в ЛКП на основе предельных углеводородов, к которым отно сятся БЛ и БТ, может быть объяснена более слабым, чем в ОН межмолекулярным взаимодействием силоксановых поверхностных групп Н [33,34] с орга нической матрицей БЛ и последующей деструкцией органической матрицы, следовательно, снижением гидрофобности и органофильности покрытия.…”

Increasing the Adhesion of Bitumen to the Surface of Mineral Fillers through Modification with a Recycled Polymer and Surfactant Obtained from Oil Refining Waste

“…The positively charged ammonium center or nitrogen atom is concentrated on the polar surface of the mineral filler, and the non-polar hydrocarbon radical is oriented towards the bituminous medium, creating a transition layer that smoothens out the polarity difference between the two phases. As a result of adsorption, the surface tension decreases, and, according to the Young equation, the surface wetting improves, which ultimately leads to an increase in bitumen adhesion to the surface of the mineral filler (Young–Dupre equation) [ 18 , 19 ].…”

High-Temperature Performance Enhancement of Bitumen by Waste PET-Derived Polyurethane

“…e performance of asphaltic bitumen is highly dependent on the temperature of the area to be used; it is brittle and hard in cold conditions and soft in hot conditions [1]. ese defective properties of bitumen can be overcome by di erent additives which endow bitumen with improved viscoelastic behavior [2][3][4][5][6][7][8][9][10]. Polymer modi ed bitumen (PMB) reduces the three causes of poor performance and loss of structural integrity of asphalt pavements: rutting: aggregate plastic deformation due to both high loads and high temperatures; fatigue cracking: caused by repetitive loading; thermal cracking: embrittlement caused by low temperature [11].…”