Assessing Open-Graded Asphalt's Resistance to Degradation Via Cantabro Test in Hot-Mix Cold Laid Asbuton

Petroleum asphalt, also known as Asbuton, can be substituted with natural asphalt sourced from Buton Island. This natural asphalt, known as Asphalt Buton (Asbuton), is abundant in rock deposits on Buton Island and nearby areas. The significant reserves of natural asphalt on Buton Island make it an ideal binder for asphalt mixtures. Various efforts have been undertaken to enhance the effectiveness of Buton asphalt as a binder in asphalt roads. One such effort involves the technological advancement of Buton asphalt pre-mix, which includes the addition of fluxing ingredients (modifiers) to ensure that the Asbuton bitumen attains the necessary properties as a binder in the asphalt mixture. By incorporating fluxing ingredients, the asphalt mixture can achieve durability and be spread and compacted at lower temperatures. This is particularly advantageous in regions with limited access to asphalt mixtures from Asphalt Mixing Plants (AMPs), such as remote and small islands in Indonesia. The production of pre-mixed Buton asphalt is carried out at the manufacturing AMP, where mixing takes place. Subsequently, the mixture can be stored or packaged, and cold temperatures can be utilized for rolling and compaction procedures in the field. Results from the Cantabro test demonstrate that the combination meets the standards for asphalt porosity mixture as outlined by the Road Engineering Association of Malaysia (REAM), with a maximum porosity of 20%, achieved at a 5.5% BGA and 3.5% flux oil level.