The Effect of Coal Powder Addition to Asphalt Concrete-Wearing Course(AC-WC)Mixture to Increase Road Surface Hardness Quality

摘要

The most common type of structural asphalt pavement in Indonesia is asphalt concrete-wearing course(AC-WC).This type of layer is the most vulnerable type,with damages mostly caused by weather and tire pressure of heavy vehicles.In this study,the test object was produced based on standardized general specification called 'Spesifikasi Umum Bina Marga.-2010(Division VI).The mixture of the test object contained varied amount of charcoal powder: 10%,20%,and 30%.From Marshal Test data obtained in the study,the mixture which met the qualification of 'Spesifikasi Umum Bina Marga' 2010 was the one containing 30% charcoal powder.The mixture had 1183 kg stability value,3.73 mm flow value,316.9 kg/mm Marshal quotient,4.47 % VIM,17.08% VMA,and 73.82% void filled.Therefore,it was concluded that 30% charcoal powder content met the Marshal test standard,and more addition of charcoal powder resulted in more void filled to cover the aggregate,and less void left in the mixture(VIM).