AP22786142 – Utilization of oily waste as a potential rejuvenator in reclaimed asphalt pavement

Objective of the project: The aim of the project is to develop the scientific foundations for the synthesis of highly charged polymer electrolytes based on polyampholytes for energy storage systems, followed by a study of their physico-chemical, mechanical, rheological and electrically conductive properties.

Relevance: The condition of roads in Kazakhstan necessitates significant repair works, making the introduction of new technologies in the construction and operation of infrastructure essential. The use of reclaimed asphalt pavements helps reduce waste and lower economic costs. This project focuses on improving the efficiency of reclamation by utilizing petroleum waste and used oils.

Scientific supervisor: Ph.D., Aitkalieva Gulzat Slyashevna

Expected and achieved results: The conducted study investigated the physicochemical properties of oil sludge and waste vegetable oils, confirming their strong potential as rejuvenators for bituminous binders. It was established that adding 1–5% oil sludge improves penetration, thermal stability, and the structural-chemical balance of aged bitumen. The use of waste oils demonstrated a pronounced plasticizing effect and enhanced material elasticity. Experiments with reclaimed asphalt pavement (RAP) showed a significant reduction in rut depth, increased compressive strength, and decreased water absorption when rejuvenators were applied. The most effective results were achieved through the combined use of oil sludge and waste oil, providing balanced performance characteristics. Overall, the findings confirm the feasibility of improving durability and performance of road materials through recycling-based approaches.

List of publications with links to them

1. Aitkaliyeva G., Azat S., Baidullayev I., Mangazbayeva R., Amitova A., Yelubay M., Toleutay G., Ismailova A., Orazymbek I., Abutalip M. Using oil sludge as a rejuvenator for reclaimed asphalt pavement: Improving sustainability in road maintenance // ES Materials & Manufacturing. – 2024. – Vol. 26. – P. 1291.
2. Aitkaliyeva G., Ashimova S., Baidullayev I., Merkibayev Y., Yelubay M., Toleutay G., Rossi C.O. Oil sludge as a rejuvenator for aged bitumen: Structural and thermal effect // Applied Sciences. – 2025. – Vol. 15, No. 12. – Article 6757. – DOI: https://doi.org/10.3390/app15126757
3. Регенерирование вторичных асфальтовых покрытий омолаживающими средствами // Вестник университета Шакарима. Серия техническая. – 2024. – № 3(15). – С. 356–363. – DOI: https://doi.org/10.53360/2788-7995-2024-3(15)-44
4. Begalieva S., Ashimova S., Yelubay M., Aitkaliyeva G. Study of the group composition of bitumens and its potential influence on physical and mechanical properties and energy efficiency // Вестник Торайгыров университета. Энергетическая серия. – 2024. – № 4. – С. 32–42. – DOI: https://doi.org/10.48081/VLGP1785
5. Авторское свидетельство № 55942 от 27.02.2025 г. Использование EVA-крошки обувной промышленности для улучшения свойств асфальта.
6. Уведомление о положительном результате формальной экспертизы № 2025-65178 от 10.09.2025 г. Способ регенерации состаренного битума.