ANALASIS KARAKTERISTIK CAMPURAN STONE MATRIX ASPHALT (SMA) DENGAN SERAT SELULOSA SERABUT KELAPA

Abstract

: Mixture of Stone Matrix Asphalt (SMA) or Split Mastic Asphalt, namely hot mix asphalt concrete that maximizes the use of coarse aggregate and high bitumen content then filled with asphalt mastic, namely a mixture of fine aggregate, filler, asphalt and cellulose fibers which function to reduce the flow of asphalt which is caused by high bitumen content. In this study, coconut fibers were used as a substitute for synthetic cellulose fibers. This study aims to analyze the characteristics of the SMA mixture using coconut fiber. Material testing was carried out first on coarse aggregate, fine aggregate, filler, asphalt, and coconut fiber according to SNI procedures. After that, the Marshall testing was carried out to obtain the Optimum Asphalt Content (OAC). Furthermore, the test object was made back on OAC with 3 variations of coconut fiber content, namely 0.2%; 0.3%; 0.4% by weight of the total mixture. The OAC obtained was 7.25%, the optimum coconut fiber content was 0.3%, where the Marshall value was 1154.85 kg (˃600 kg), the remaining Marshall value was 96.57% (≥90%). Marshall's other characteristics have met the 2018 General Specifications 2018 of the Ministry of Public Works and Community housings. The value of Cantabro Abration Loss (CAL) is 2.1% (≤16%). The value of Indirect Tensile Strength (ITS) namely 110.22 kPa. The asphalt flow test (Drain-down) was 0.021% (≤0.3%) while for the test object that was not added with fibers the value was 2.09%.