Studying Characteristics of Hot Fine-Grained Asphalt Concrete with the Addition of Coked Sands from the Pyrolysis of Oil Sands
Tileuberdi Y. Ongarbayev Y. Mukatayeva Z. Zhanbekov K. Mukhambetkaliyev K. Akkazin Y. Shadin N. Imanbayev Y.
November 2024Multidisciplinary Digital Publishing Institute (MDPI)
Processes
2024#12Issue 11
This paper investigates the potential use of coked sands, a byproduct of the thermal processing (pyrolysis) of oil sands, in asphalt concrete mixtures. After pyrolysis extracts the oil from the oil sand, the remaining mineral part becomes coked and changes color to black as solid waste, resulting in a coating of biochar. The coked sand’s X-ray phase analysis (XRD) shows peaks at 4.2564, 3.6749, 3.3768, 3.2380, 3.1903, 2.4581, 2.2800, and 2.2365. Quartz, aluminosilicates, metal oxides, and possibly even carbonates make up the sand’s mineral makeup, as indicated by these peaks. One way to use them is in road construction. In this study, we substituted sand screenings with coked sand in amounts of 5%, 7%, and 10% to examine its impact on the composition of asphalt concrete. This study used 5% paving bitumen (BND 70/100) as a binder for asphalt mineral materials of varying sizes. It concludes that using coked sand to produce asphalt concrete can save 5–10% of sand screenings. The test results showed that adding 5% and 7% of coked sand increases the compressive strength at 50 °C by 8% and 31%, respectively. Adding 10% of coked sand does not increase the strength and actually makes it weaker. The results of the asphalt concrete samples meet type B grade 1 standards of ST RK 1225-2019.
asphalt concrete , coked oil , oil sand , pavement , pyrolysis , sand screenings
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Institute of Natural Sciences and Geography, Abai Kazakh National Pedagogical University, 13, Dostyk Ave., Almaty, 050010, Kazakhstan
Laboratory of Petrochemical Processes, Institute of Combustion Problems, 172, Bogenbai Batyr Str., Almaty, 050012, Kazakhstan
Faculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, 71, Al-Farabi Ave., Almaty, 050040, Kazakhstan
Department of Science, Kazakhstan Road Research Institute, 35, Zheke Batyr Str., Astana, 010000, Kazakhstan
Institute of Natural Sciences and Geography
Laboratory of Petrochemical Processes
Faculty of Chemistry and Chemical Technology
Department of Science
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