Pavement analysis for road construction on expansive soil at Merauke District

Abstract

Development in Merauke District for the last five years run in various fields such as education, government, health, trade, and housing. This development requires good infrastructure to support related activities. One development activity that becomes the focus of Merauke District government today is the construction of Regional General Hospital which is located at Veteran Street, Nggolar Village of Merauke District. Soil sub grade in Veteran Street is clay that easily occurs due to deformation caused by passing vehicle. This research collected soil sub grade characteristic, number of vehicles, California Bearing Ratio, and traffic growth in Merauke District. Vehicle data collection through direct measurement at research location, sub-grade characteristic, and California Bearing Ratio data using Dynamic Cone Penetrometer tool, piknometer and hot plate. An analysis was performed using Pavement Design Manual 2013. The result obtained was a plastic limit of 34,72%, liquid limit of 55,8%, plasticity index of 21,07%. The potential for shrinkage is hight based on the plasticity index value, known as expansive soil. Pavement using flexible pavement with surface course composition of AC-WC as thick as 40mm and AC-BC as thick as 60mm, LPA course thickness of 40cm thus the total thickness of pavement in Veteran Road is 500mm.