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The 16th National Conference and Exhibition on Bitumen, Asphalt, and Machinery was held from October 29 to October 31, 2024, at the Road, Housing, and Urban Development Research Center. This scientific event aimed to expand technical knowledge in the road construction industry and to provide a platform for the exchange of ideas and experiences among practitioners, experts, and specialists in related fields.

In this study, the effect of penetration and temperature changes on the performance specifications of bitumen was investigated experimentally. In this regard, it was ensured that the bitumen was obtained from a constant raw material and oxidation process at different times from the reactor. Experiments were carried out on bitumen with different penetration