Influence of Fly Ash, Volcanic Ash and Rice Husk Ash as Filler Asphalt Concrete Wearing Course Based on Marshall Characteristics

Filler serves as a filling for the voids between coarse aggregate and fine aggregate in the AC-WC mixture. The filler has a significant effect on the marshall characteristics of the AC-WC mixture even though it is only as a filler. This study aims to investigate the effect of fly ash, volcanic ash, rice husk ash on marshall characteristics. The research data obtained from secondary data based on previous researchers, (Pratama 2021) for fly ash filler, (Rezi 2021) for volcanic ash filler, (Malacca 2021) for rice husk ash filler. The data is in the form of variations in the percentage of filler (fly ash, rice husk and volcano ash) with the same asphalt content. The sample was processed for statistical testing using SPSS version 26 software to determine the effect of asphalt content and filler percentage on marshall characteristics. Optimum Asphalt Content (OAC) test results obtained 6.1% fly ash, 6.2% volcanic ash, 6.7% rice husk ash. The test results on Marshall showed the most influential filler in the 2% rice husk ash filler with density, stability, Marshall Quontient (MQ) and VMA values, while the Flow value obtained the highest value in 1% volcanic ash filler. For the VFB of fly ash and rice husk ash, there was a decrease in the value of the filler content of 2% and 2.5% and an increase in the filler content of 3%. The results of statistical tests using SPSS show that those that have a significant positive linear influence on the asphalt content and filler percentage are Stability and Marshall Quotient (MQ). Research has contributed to research in the field of materials for AC-WC mixtures.