TITLE:
Feasibility Investigation of Bitumen Properties by Blending of Coal Tar Pitch
AUTHORS:
Bat-Erdene Erdenetsogt, Zoltuya Khashbaatar, Ilchgerel Dash, Battsetseg Tsog
KEYWORDS:
Modified Bitumen, Blending, Coal Tar Pitch, Ductility, Softening Point
JOURNAL NAME:
Advances in Chemical Engineering and Science,
Vol.13 No.2,
April
13,
2023
ABSTRACT: There are numerous methods and additives available
to improve the durability and quality of road bitumen. A coal tar obtained by
coal coking was distilled in a laboratory into fractions of initial boiling
point IBP-180℃ (gasoline-like
fuel), 180℃ - 360℃ (diesel-like
fuel), and >360℃ (residue or coal tar pitch). The coal tar pitch was added
into road bitumen by up to 1 - 5 wt% and investigated the alteration of physical and chemical
properties. The physico-mechanical
properties of coal tar pitch and bitumen blends, as well as the chemical group composition, were determined using
standard techniques (MNS) and the SARA method, respectively. Results of
3% coal tar pitch addition into bitumen enhanced ductility by 12.4% and
softening point by 1.6℃. We found that blending with bitumen coal tar pitch as
a modifier could improve bitumen properties.