Upaya Peningkatan Kinerja CPHMA Dengan Modifier Minyak Kemiri Dan Aditif NaCl
Keywords:
CPHMA, Asbuton, Kemiri oil, NaCl, Marshall testAbstract
The performance of Cold Paving Hot Mix Asbuton (CPHMA) still needs improvement because this mixture often shows low stability and has not fully met technical requirements. This study was conducted to evaluate the effect of adding kemiri oil as a modifier and sodium chloride (NaCl) as an additive on the performance of CPHMA. The objective of this research was to assess the effectiveness of combining these two materials through three laboratory test methods: the centrifuge test to examine bitumen extraction ability, the Liquid-Liquid Extraction (LLE) test to measure extraction efficiency, and the Marshall test to evaluate the mechanical characteristics of the mixture. The study used NaCl variations of 1%, 3%, and 5% of the total modifier content. The centrifuge test results showed that the extracted liquid weight ranged from 386 to 447 grams, with the highest value obtained at 1% NaCl. In the LLE test, extraction efficiency ranged from 68.92% to 86.73%, also with the highest value at 1% NaCl. The Marshall test results showed stability values ranging from 1118 to 1673 kg, with the highest value at 3% NaCl, and all variations met the minimum CPHMA stability requirement. Other Marshall parameters such as flow, VIM, VFB, and VMA were within the allowable specification limits. Overall, the addition of kemiri oil and NaCl improved the performance of CPHMA. The 1% NaCl variation produced the best extraction performance, while the 3% NaCl variation provided the highest mechanical performance in the Marshall test. This combination shows potential as an alternative additive that can improve Asbuton mixtures.
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