Upon seeing the current state of roads in the country, in
which high investments are made and the pavement structures do not support the
period of time for which they are constructed, it becomes necessary to search
for new construction and stabilization methods for pavement which comply with
construction specifications. This study shows the role of an alternative in
granular base stabilization, such as coal tar. Coal tar is a by-product of coal
distillation in the absence of oxygen to obtain metallurgical coke; its colour
varies from dark coffee to black, slightly viscous and its density is greater
than that of water. Taking into account the previous characteristics, this
study also presents the feasibility of using coal tar for the improvement of
physical properties, mechanics and dynamics of materials used in road
engineering. The coal tar used in this study is produced in the steel Acerías
Paz del Río S.A. In this way, the origin, characteristics, and properties of
tar are first described. Next, its combination with granular-based material is
evaluated through the CBR test procedure to determine its resistance and to
compare it with the non-stabilized material. Finally, the behaviour of the
material when subjected to dead loads by means of resistant modules found with
the NAT (Nottingham Asphalt Tester) is explored. As a result, the option of
using coal tar as a stabilizer was identified due to its use under specific
conditions.
Author(s) Details:
R Ochoa Díaz,
Universidad Pedagógica y Tecnológica de Colombia, Tunja, Colombia.
A Montañez,
Universidad
Pedagógica y Tecnológica de Colombia, Tunja, Colombia.
J Cuentas,
Universidad Pedagógica y Tecnológica de Colombia, Tunja, Colombia.
Please see the link here: https://stm.bookpi.org/CPSTR-V6/article/view/13565
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