EXPERIMENTAL ANALYSIS OF ASPHALT CONCRETE – WEARING COURSE (AC-WC) MIXTURES USING FULLY EXTRACTED PURE BUTON ROCK ASPHALT WITH PALM OIL BUNCH BIOASPHALT MODIFIER

• Main Author: Syakur Asyurah, Muhammad
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/80560
• Institution: Institut Teknologi Bandung

Flexible pavement consists of a wear/surface layer as well as a base and subbase layer. Based on the 2021 Ministry of Public Works and Housing, the need for asphalt for road infrastructure in Indonesia is around 1.2 million tons per year, with 50% of the asphalt need coming from imported asphalt. This is an effort to overcome imports by utilizing natural resources in Indonesia, namely Buton Asphalt. Full Extraction Pure Asbuton is the result of extraction from Lawele Asbuton until pure asphalt is obtained, the mineral content of which can be said to be no longer present or less than 1%. This bioasphalt is made from biomass containing lignin. This research aims to analyze: the characteristics of the AC-WC mixture with the Palm Oil Bunch Bioasphalt modifier against Full Extraction Pure Asbuton, the Resilient Modulus performance of the AC-WC mixture with the Palm Oil Bunches Bioasphalt modifier against Full Extraction Pure Asbuton, and the performance of Fatigue Resistance in the AC-WC mixture with Palm Oil Bunch Bioasphalt modifier against Full Extraction Pure Asbuton. The asphalt used in the research was Pen 60/70 and Full Extraction Pure Asbuton. The bioasphalt used in this research is Palm Oil Bunches Bioasphalt (BioTKS). The aggregate gradation used for the asphalt mixture is the Asphalt Concrete Wearing Course (AC-WC) gradation based on the General Specifications for Bina Marga 2018 Revision 2. This research uses four variations of Asphalt Concrete Wearing Course mixture (AC-WC) with an AC-WC ASB composition of 7% + ASPHALT PEN 60/70 + BioTKS, AC-WC ASB 8% + ASPHALT PEN 60/70 + BioTKS, AC-WC ASB 9% + ASPHALT PEN 60/70 + BioTKS to the total weight of the mixture and the use of Optimum Bioasphalt 5% to the weight Full Extraction Pure Asbuton asphalt as a modifier and a mixture of Asphalt Concrete-Wearing Course (AC-WC) with a composition without the addition of Full Extraction Pure Asbuton and BioTKS as a mixture control. Next, further testing was carried out consisting of testing the resilient modulus using the Indirect Modulus Tensile Test method using the Universal Material Apparatus (UMATTA) which refers to AASHTO TP-31 and ASTM D 4132-82 using temperature variations of 25°C, 35°C, and 45 °C and fatigue testing was carried out using the Four Point Bending Test (4PBT) method at a temperature of 20 °C with controlled strain loading of 400 (??), 500 (??), and 600 (??). Based on all types of AC-WC mixtures with a combination of Asphalt Pen 60/70 with the addition of 7%, 8% and 9% Pure Full Extraction Asbuton and BioTKS 5%, the characteristics of the mixture have stability values which increase with the addition of Full Extraction Pure Asbuton levels. The three mixtures containing Full Extraction Pure Asbuton and BioTKS modifications have less stability than the control AC-WC mixture, but these three mixtures are still included in the 2018 General Specifications for Bina Marga (revision 2). The resilient modulus value of the asphalt mixture at test temperatures of 25°C, 35°C, and 45°C has a Resilient Modulus value of the asphalt AC-WC mixture containing Full Extraction Pure Asbuton modification and BioTKS modifier which is greater than the control AC-WC mixture. Regarding the performance of Fatigue Resistance in AC-WC mixtures using pure full extraction asbuton on the effect of Palm Oil Bunches Bioasphalt modifier using the Four Point Bending Test fatigue method. The AC-WC mixture with the addition of the Palm Oil Bunch Bioasphalt modifier shows that with the increase in the amount of Full Extraction Pure Asbuton, the Nf value becomes smaller, with the optimum Full Extraction Pure Asbuton content being 7%.