The Effect of Additional Hydrated Lime as Filler on The Permanent Deformation of Asphalt Mixture

Abstract

Hydrated lime is one of the alternative fillers that can be used in asphalt mixtures. Hydrated lime as a filler can act as an anti-stripping agent that can increase the durability or resistance of the asphalt mixture in accepting traffic loads such as vehicle weight and friction between vehicle wheels and the road surface. The purpose of this study was to determine how the effect of hydrated lime as a filler on permanent deformation of the AC-WC mixture using a Wheel Tracking Machine (WTM) with a filler composition of 0%, 25%, 50%, 75% and 100% of the weight total fillers. AC-WC (Asphalt Concrete Wearing Course) is the topmost layer of asphalt that serves to receive traffic loads and distribute it to the layers below it in the form of vehicle loads (vertical forces), brakes (horizontal forces) and vehicle wheel vibrations. Because it is on the top, this layer is very susceptible to damage and deformation due to traffic loads or also known as permanent deformation. From the results of the study, it was found that the best mixture of AC-WC is a mixture that has an aggregate that is in accordance with the gradation of the mixture, with an Optimum Asphalt Content of 6.5%, a maximum filler composition of 75% of the weight of the filler and also hydrated lime as a filler in the AC-WC mixture can increase the stability of the asphalt mixture from 1708.25 kg to 1910.55 kg, and also hydrated lime as a filler can slow down the permanent deformation of the asphalt mixture from 1312.5 tracks/mm to 5727.7 tracks/mm