PERFORMANCE ANALYSIS OF RESILIENT MODULUS AND FATIGUE RESISTANCE OF AC-WC MIXTURE WITH PURE ASBUTON, BNA BLEND, AND ASPHALT PEN. 60/70

• Main Author: Iman Adiwidodo, Ariefian
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/72250
• Institution: Institut Teknologi Bandung

One of Indonesia's natural resources is Buton Island Asphalt in Southeast Sulawesi Province which is known as buton. Based on research from Pusjatan in 2011, the number of asbuton material sources amounted to nearly 662 tonnes. In the early stages of implementing the use of buton asbuton used grain type. In the road construction trials from 2008 to 2010 there were several defects such as chipping, plastic deformation and cracks. In addition to flaking the buton layer from the aggregate layer, the release of aggregate from the pavement also easily occurs on these roads. In addition, the relatively high water content contained in the asbuton also contributed to the damage in the form of flaking. The type of asphalt mixture used in this study was the AC-WC (Asphaltic Concrete Wearing Course) wear layer mixture. The purpose of this study was to determine the performance of the resilient modulus and fatigue resistance of the AC-WC asphalt mixture using pure asphalt, BNA Blend, and pen asphalt. 60/70. In accordance with the results of testing the characteristics of asphalt that has been carried out, pure asphalt and BNA Blend have a lower penetration value compared to pen asphalt. 60/70. Asphalt characteristics were tested using the 2018 General Highways Specifications and the Indonesian National Standard 9096:2022. To determine the performance of the hot asphalt mixture, testing was carried out using the Marshall method, the resilient modulus using the UMATTA tool, and testing the resistance to fatigue cracking using the Beam Fatigue Apparatus. The results of the stability test showed that the mixture with BNA Blend had the highest value, namely 1432 kg, compared to 1310 kg in the mixture with pure asphalt, and compared to 1209 kg in the mixture with pen asphalt. 60/70. The stability of hot asphalt mixture AC-WC with BNA Blend has the highest value, this can happen because the bitumen content still contains minerals and low penetration value so as to provide support for increased stability. The results of the resilience modulus test on a mixture with pure asphalt and BNA Blend have a higher value compared to pen asphalt. 60/70 at 25 °C and 35 °C, and nearly equivalent at 45 °C. This shows that the hot asphalt mixture AC-WC using pure asphalt and BNA Blend at temperatures of 25 °C and 35 °C has a better ability to withstand deformation than the hot asphalt mixture AC-WC with pen asphalt. 60/70. But at a temperature of 45 °C the resilient modulus values of the three types of AC-WC corrosive mixtures did not differ much. Based on the fatigue crack resistance test results, the hot asphalt mixture AC-WC with pure asphalt has a lower fatigue resistance when compared to the hot asphalt mixture AC-WC with pen asphalt. 60/70. But it is different from the results on the AC-WC hot asphalt mixture using BNA Blend which has the highest resistance to fatigue cracking. This is possible because BNA Blend still contains minerals and there are added ingredients which cause the asphalt to have high flexibility. In accordance with the results of the tests and analyzes that have been carried out, in general the hot asphalt mixture AC-WC with BNA Blend tends to be superior compared to the hot asphalt mixture AC-WC which uses pen.60/70 asphalt and pure asbuton. Where in terms of modulus parameters the asphalt mixture has stiffness that can withstand deformation better and in fatigue testing has a higher fatigue life.