PERFORMANCE OF WARM MIX ASPHALT CONCRETE WEARING COURSE (AC-WC) USING ASPHALT PEN 60/70 AND SASOBIT® ADDITIVE

• Main Author: Carlina, Serli
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/36846
• Institution: Institut Teknologi Bandung

Hot Mix Asphalt (HMA) is a type of paved mixture commonly used as flexible pavement material. However, HMA has weaknesses in terms of high mixing and compaction temperature, resulting in high CO2 and Greenhouse Gas (GHG) emissions which have a negative impact on the environment. Therefore, a type of asphalt with lower mixing and compaction temperatures is needed. One alternative that can be done is to add Sasobit® additives to the asphalt. This study looks for the best levels of Sasobit® additives that can be added into the asphalt so that resulting the lowest mixing and compaction temperatures. The level of Sasobit® additives studied was 1%, 2% and 3% of the asphalt weight, sasobit levels higher than 3% are not recommended because it will cause the asphalt to be more liquid. The results show that the addition of Sasobit® additives by 3% may reduce the mixing temperature and the compaction temperature of about 70C lower compared to the mixture without Sasobit® additives. Further, this study compares the performance of paved mixtures using Sasobit® additives (mixture of Warm Mix Asphalt / WMA) with asphalt mixtures without Sasobit® additives (Asphalt / HMA Hot Mix mixture). The performance studied includes Marshall Stability, UMATTA Resilient Modulus and Fatigue. As a result, the WMA mixture that uses Sasobit® additives of 3% has a stability value of 1160 kg marshall; this value is higher than the Marshall stability obtained for the HMA mixture 1075 kg. However, the UMATTA testing at temperatures of 250C and 450C resulted in the highest resilient modulus in the mixture of WMA (3080 Mpa and 315 Mpa). The fatigue testing shows that WMA mixture is more flexible because it has an elastic modulus value of 4854 MPa and flexural stiffness 4551 MPa in a tensile 500µ? strain compared to HMA mixture.