Glycerin Pitch as a partial replacement of pen 60/70 in AC-WC mixture

Department of Civil Engineering, Bandung State Polytechnic, Bandung 40559, Indonesia

^* Corresponding author: rini.septiani.mtri22@polban.ac.id

Abstract

Glycerin pitch is a glycerol refining product from the oleochemical industry with a processing cost of US$ 400/ton. In this research, GP is used as an alternative asphalt material to replace and reduce the use of imported asphalt. GP came from 13 Indonesian oleochemical companies and was categorized based on inorganic content with sample 1 being less than 10% with an optimum GP content of 27% and sample 2 being more than 10% with an optimum GP content of 14.2%. The primary objective of this study was to explore the potential of GP as a substitute for imported asphalt. The test results showed that the optimum asphalt content for GP in sample 1 was 6% which resulted in a density of 2.26 g/cm3, VIM 4.4%, VMA 18.77%, VFB 76.53%, stability 619 kg, flow 2.83 mm, MQ 211 kg/mm. In sample 2, optimum binder content was determined at 6.1%, resulting in density of 2.34 g/cm3, VIM 5%, VMA 15.68%, VFB 68.02%, stability 1092.3 kg, flow 3.45 mm, and MQ 316 mm. The optimized Gp content value of 27% and 14.2% Gp can reduce the amount of asphalt with Marshall test results with the best stability value in sample 2.