GLYCERINE PITCH AS AN EXTENDER FOR ASPHALT BINDER PEN 60/70

A V R Sihombing^[1]*, R Utami¹, A K Soemantri¹, A Febriansya¹, and R P Sihombing²

¹ Department of Civil Engineering, Politeknik Negeri Bandung, Jln.Gegerkalong Hilir, Ciwaruga, Bandung, Indonesia

²Department of Architecture, Institut Teknologi Nasional Bandung, Jl. PH.H. Mustofa No.23, Bandung, Indonesia

[1]^* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol2.art14

ABSTRACT

Glycerine pitch (GP) is a by-product from the refining process of Crude Glycerol from the palm oleochemical industry which in its processing requires a cost of USD 400/ton. In Indonesia, it is estimated that the production of GP reaches 35 thousand tons/year. This study aims to examine the potential of GP as an extender for asphalt binder pen 60/70, according to the Fourier transform infrared spectroscopy (FTIR) test to see its chemical structure and asphalt binder rheology in the laboratory. The materials used in this research are pen 60/70 and GP from the oil palm oleochemical industry in Bekasi Regency which are produced from the hydrolysis route. GP was added to asphalt pen 60/70 with variations in the percentage of GP to the weight of asphalt pen 60/70 were 0%, 15%, 20%, and 25%. Based on the results of the FTIR test, it is known that GP belongs to a polyglycerol compound which is similar to the long compound in petroleum asphalt. The addition of GP up to 25% to asphalt-based rheology still meets the characteristics of pen 60/70 with a penetration value of 64.14 dmm, softening point 52 C, viscosity 408.52 cSt, ductility > 100 cm and density 1.061.

Keywords : Glycherine Pitch; Ashpalt; FITR

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