Assessment of the effectiveness and the initial cost efficiency of
hot recycled asphalt using polymer modified bitumen
الباحث الأول:
sarmad shoman
الباحثين الآخرين:
ali Almusawi
Andrei lupanov
المجلة:
Elsevier
تاريخ النشر:
9 مارس، 2023
مختصر البحث:
The drastic increase in environmental concerns and increasing costs of road construction materials
necessitate evaluating some alternative solutions. One of the most suitable alternatives is
recycling old asphalt pavement to produce reclaimed asph…
The drastic increase in environmental concerns and increasing costs of road construction materials
necessitate evaluating some alternative solutions. One of the most suitable alternatives is
recycling old asphalt pavement to produce reclaimed asphalt pavement (RAP). The RAP materials
have been commonly combined with asphalt mixtures during pavement construction. Incorporating
RAP material should demonstrate an equivalent or better performance than conventional
asphalt mixtures. Conversely, the inclusion of RAP mainly needs to improve performance
compared to conventional asphalt mixtures. The key issue of using RAP is to restore the loss
properties of aged materials and normally asphalt Agent Rejuvenator (ARA) was used. Also,
adding polymers with RAP into the asphalt mixture becomes necessary to obtain the required
performance. This study investigated the RAP effects of elastomeric polymer on the performance
of the asphalt mixture following Russian standards (GOST). The impact of using PMB with RAP
material on the asphalt mixture’s performance was primarily considered by employing tests that
can reveal the adhesion property. Additionally, the performance of the pavement was evaluated
in terms of strength and low-temperature cracking. For this purpose, numerous test methods were
implemented to appraise the asphalt performance, such as compressive strength, moisture susceptibility,
shear resistance, tensile strength, porosity of the mineral particles, and residual
porosity. The results indicated that the overall performance of the asphalt mixtures prepared with
RAP and combined with polymer depicted a better performance. Moreover, the initial construction
cost for each asphalt composition was estimated and compared. The utilization of PMB
increased the cost of the asphalt mixture. However, such an increase in the cost would lead to an
increase in the overall performance, especially for RAP mixtures.
