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The aim of this study was to determine the effect of bio-asphalt in AC-WC mixture containing reclaimed asphalt pavement (RAP), based on resilient modulus (Smix) of asphalt mixture with variations of RAP content were 10, 20, and 30% to the weight of the mixture. Bio-asphalt was produced by pyrolysis process from biomass of coconut shell (BioCS) used in asphalt mixture as a modifier with 23% content to the weight of RAP bitumen. Mixture was compared to AC-WC with fresh material by resilient modulus under OBC conditions using UMATTA. The conditions of testing were carried out by loading pulse width 250 ms, pulse repetition period 3000 ms and at test temperatures 20, 25, 35, and 40 °C. The test results showed that by increasing number of RA, the Smix was getting bigger. Although the Smix value was greater than the control mixture, the performance of BioCS was shown by the Smix production. The number of RAP increases indicating the activation of the RAP bitumen so that there was a bond between the bitumen and the aggregate. Based on these data, a Smix model for a mixture of ACWC + RAP with 23% BioCS was obtained. the use of coconut shell biomass as bioaspal has potential as a renewable and sustainable pavement material, this can be seen from the results of testing the effect on AC-WC hot asphalt mixture.

DEVELOPMENT OF RESILIENT MODULUS MODEL PROPOSED FOR BIO-ASPHALT AS MODIFIER IN ASPHALT CONCRETE CONTAINING RECLAIMED ASPHALT PAVEMENT