Moisture Susceptibility and Rutting Test of Reclaimed Asphalt Pavement on Molasses Modified Hot Mix Asphalt
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Date
2022-01
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Addis Ababa University
Abstract
n Ethiopia, every year, various projects on road repair, upgrading, new road construction, and
routine maintenance projects are undertaken, all of which rely on the usage of natural and
industrial resources. Reclaimed asphalt pavement material (RAP), the usage of RAP in Ethiopia
is very limited , due to lack of clear standard and recommendations on how to use asphalt
pavement wastes. Reclaimed asphalt pavement has advantages in terms of environmental
benefits, cost savings, land fill, and, but it also has drawbacks such as ductility loss and harsh
mixtures when it is optimized. This research studies the effect of RAP on HMA with binder
treated with molasses. The marshal mix method was used to create hot mix asphalt in the
labratory. The volumetric test, stability, flow, moisture susceptibility, and rutting tests were
performed on four different Reclaimed asphalt pavement contents (10, 20, 30, and 40%) HMA
with a 3% molasses modified binder. Based on this study, when compared to the control mix, all
of the modified mixes performed better in the tests undertaken for this study. When compared to
other RAP and molasses-modified mixes, the RAP and molasses-modified mixes had better
moisture resistance and lower rut depth. The RAP and molasses modified mixes performed better
in terms of stability, flow, and volumetric qualities when compared to the other mixes, however
because the RAP percentages utilized were 10%, 20%, 30%, and 40%, these attributes improved
on the higher RAP (30 & 40) percentages this may be due to the softening effect of molasses.
Mixes with RAP and molasses showed better resistance for moisture and lower rut depth, but
more studies should be conducted for different molasses and RAP contents with more
performances tests to have more reliable data
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Keywords
Hot Mix Asphalt, Asphalt Pavement, Rutting Test