Pengaruh Batu Laterit sebagai Material Substitusi Pengganti Agregat Kasar Terhadap Stabilitas Marshall Pada Campuran Asphalt Concrete - Wearing Course (AC–WC)

Abstract

East Kalimantan has a large potential for laterite stone, one of which is laterite from Manunggal Jaya Village, Tenggarong Seberang District. Until now, the use of laterite as a coarse aggregate material in the asphalt concrete pavement mixture has not been optimally utilized. The purpose of this study was to determine the characteristics of Marshall and determine the optimum asphalt content from the use of laterite as a substitute for coarse aggregate so that laterite can be used as a highway construction material. In this study, Marshall specimens were made with variations of laterite as a substitute for coarse aggregate at levels 0%, 25%, 50%, 75% and 100% and the asphalt content of the plan was 4.5%, 5%, 5.5%, 6 %, and 6.5% which will then determine the optimum bitumen content, stability, flow, VIM, VMA, VFA and MQ in the Asphalt Concrete – Wearing Coarse (AC-WC). Based on the results of the study, it was found that the use of laterite stone as a substitute for coarse aggregate in AC-WC was a maximum of 75% and the optimum asphalt content value was 6.22% with Marshall characteristics including the stability value of 1480 kg, flow 3.85%, VIM 4.20%, VMA 16.40%, VFA 74.00% and MQ 390.00 kg / mm. The results showed that the AC-WC mixture with a substitute for coarse aggregate using laterite rock met the requirements for the AC-WC concrete asphalt layer.