PERFORMANCE ANALYSIS OF THE USE OF COCONUT FIBERAS A SUBSTITUTE OF CELLULOSE FIBER IN STONE MATRIX ASPHALT (SMA) MIXTURE ON RESILIENT MODULUS AND RUTTING

• Main Author: PERMANA, ASEP
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/66494
• Institution: Institut Teknologi Bandung

The increasing traffic load and tropical climate in Indonesia contribute to a very rapid damage to road pavements in Indonesia. One type of pavement that can be considered as a solution to the problem of road damage that supports development is Stone Matrix Asphalt (SMA) which is a type of flexible pavement developed in Germany in the mid- 1960s. SMA has advantages compared to other types of pavement because SMA pavement has high resistance to grooves, flexibility and durability (Ibrahim M. Asi., 2006). The main problem in SMA is asphalt flow and asphalt fatness (bleeding), therefore asphalt stabilization materials are needed which can be in the form of fibers and polymers. Fibers are used in asphalt mixtures for two main purposes, firstly to increase toughness and crack resistance and secondly to stabilize asphalt binders (Hansen et al., 2000). As a tropical country, Indonesia has a high potential for coconut production. The area of coconut plantations reaches 3,654,478 hectares with a total production of around 3,051,585 tons (DitJenbun, 2014).research conducted by Oda (2012) stated that the addition of coconut fiber increased the value of the resilient modulus by 14%. In a study conducted by raviteja (2019) the addition of fiber in the SMA mixture provided higher stability, and showed higher resistance to moisture-induced damage. The purpose of this study was to analyze the performance of adding coconut fiber as a stabilizer as a substitute for cellulose fiber on the value of the resilience modulus and permanent deformation. This test begins with testing properties, followed by the manufacture of test objects using Marshall compactor based on Bina marga 2018 specifications. Then resilient modulus testing using the UMATTA tool and rutting testing using the Hamburgh Wheel Tracking tool in wet conditions. Based on the properties testing, the aggregate and asphalt have met the specifications. A mixture of SMA using 0,5% coconut fiber has a smaller KAO value than a mixture using cellulose fiber and a mixture using 0,3% coconut fiber, where a mixture of SMA using 0,5% coconut fiber has an KAO value of 6% while a mixture of SMA using coconut fiber 0,3% coconut has an KAO value of 6.2% and a mixture of SMA using cellulose fiber has an KAO value of 6.25%. Comparison of the values of the resilience modulus of the mixture using cellulose fiber stabilizer, coconut fiber, rock wool and polyester, it was found that the mixture using coconut fiber had the largest modulus of resilience value with the mixture using 0,5% coconut fiber having a resilience modulus value of 3162.8 Mpa. From the results of the HWTD test, the mixture using coconut fiber as an added material was 0,3% and 0,5% more resistant to rutting than the mixture using cellulose fiber as an additive, Where the rutting value of the mixture using cellulose fiber is 2.75 mm while the rutting value for coconut fiber is 0,3% as an added material is 2.35 mm and for coconut fiber 0,5% is 2.57 mm.