Marshall Characteristics of Hotmix Cold Laid Containing Buton Granular Asphalt (BGA) with Modifier Oil Base and Modifier Water Base

Abstract

The need of asphalt mixing plant (AMP) in the hot mix asphalt (HMA) production resulting in the construction of hot rolled asphalt (HRS) is restrained mostly at the areas that possess AMP. Many remote areas or remote islands cannot possess AMP hence the construction of HRS cannot be optimized at those areas. Natural rock asphalt that deposited in Buton Island, Southeast Sulawesi in Indonesia is crushed to produce Buton granular asphalt (BGA). BGA and cold modifier were utilized to produce hot mixture that can be laid at cold temperature of 50OC to 27OC. The employment of hotmix cold laid mixture containing BGA and cold modifier as pavement mixture is one solution to substitute hot rolled asphalt application in the remote and distance areas. The experimental results to investigate the Marshal Characteristic showed the hotmix cold laid containing BGA and cold modifier can attain an adequate compaction. At an optimum bitumen content of 8% within BGA, no significant differences on VIM, VMA and VFB were observed when the storing and compaction time were extended from 3 to 7 days. The stability value and tend to decline and the flow value increased with the extension of the storing and compaction time.