Effect of resin and catalyst addition on the characteristics of asphalt concrete wearing course (AC-WC) for coastal area
Keywords:
Rob, Modified Asphalt, StabilityAbstract
The Pantura Road connecting Semarang and Demak frequently experiences tidal flooding (rob) due to severe land subsidence and rising sea levels. Excessive groundwater extraction in industrial areas and global warming accelerate pavement deterioration, causing cracks, potholes, and deformation that threaten road safety. To address this issue, this study aims to improve the durability of Asphalt Concrete Wearing Course (AC-WC) through the addition of catalyst resin as a chemical modifier. A total of 81 samples were prepared with resin contents of 0%, 2%, and 4%, resulting in nine mixture combinations with three replicates each. The asphalt used was penetration grade 60/70, while aggregate and asphalt properties were tested according to the Bina Marga 2018 Technical Specifications (Revision 2). Laboratory tests included Marshall stability, flow, fatigue, Marshall Quotient, and volumetric parameters (VIM, VMA, and VFA). Specimens were submerged in tidal water for 7, 14, and 21 days to simulate continuous tidal inundation. The tidal water was analyzed for Total Suspended Solids (TSS), Total Dissolved Solids (TDS), chloride, sulfate, salinity, and pH. Statistical analysis was performed to evaluate the effects of resin content and immersion duration on AC-WC performance. The findings indicate that the Job Mix Formula (JMF) of modified AC-WC immersed for 7 days with 2% and 4% resin meets the Bina Marga 2018 specifications, while longer immersion durations reduced stability and durability. Catalyst resin modification shows potential to enhance pavement resistance to tidal flooding in coastal regions.
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