International Journal on Advanced Science, Engineering and Information Technology, Vol. 11 (2021) No. 2, pages: 698-704, DOI:10.18517/ijaseit.11.2.9898

Application of 60/70 Grade Bitumen with Layer Variations on Ballast Structures

Dian M. Setiawan

Abstract

The conventional track application dominates the Indonesian rail track type. The rail track deterioration due to the overloading train becomes a crucial issue since it leads to high maintenance costs. Damage to the rail track can reduce its service life and carrying capacity. This research utilized the 60/70 grade bitumen as a binding material and stabilization of ballast structure. The aim is to analyze the mechanical behavior of new-ballast and poor-ballast structures, with 4% of the 60/70 grade bitumen in one layer (ballast surface layer) and three layers. The specimen’s weight, vertical deformation, elastic modulus, and ballast material abrasion have been analyzed using a UTM compressive strength test. The most obvious finding to appear from this research is that the new-ballast-based specimen, as for being free of mud and dust, was lighter in weight than the poor-ballast-based sample. Furthermore, the new-ballast and poor-ballast-based specimens added with 4% of the 60/70 grade bitumen had a lower vertical deformation than the baseline specimen. The position of 4% of the 60/70 grade bitumen on the ballast surface layer produced an optimum load distribution to the overall ballast layer. Also, the specimens consisting of new-ballast produced a higher elastic modulus compared to the specimens comprising poor-ballast. Lastly, the presence of the well-distributed asphalt on three layers of ballast structure could produce the minimum abrasion value due to the possibility that asphalt materials could protect ballast materials from abrasion.

Keywords:

60/70 grade bitumen; ballast abrasion; elastic modulus; specimen’s weight; vertical deformation

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