Seminar Details
Seminar Title:
COMBINE EFFECTS OF NATURAL AND RECYCLED CONCRETE AGGREGATE ON BEHAVIOR OF ASPHALT MIX
Seminar Type:
Departmental Seminar
Department:
Civil Engineering
Speaker Name:
Aditya Kumar Das
Speaker Type:
Faculty
Venue:
Seminar Room, CE
Date and Time:
19 Apr 2024 04:30PM
Contact:
Prof. Ujjal Chattaraj Phone: 2462327, Email: chattaraju@nitrkl.ac.in
Abstract:
In this study, the possibility of using RCA from building demolition waste in
asphaltic mix, in combination with natural aggregate is explored. RCA was
considered as 0%, 25%, 50%, and 60% of the weight of dry aggregates. Two grades
of asphalt were used in this study namely, viscosity grade-30 (VG 30) and a
polymer-modified asphalt binder (PMB-40). The RCA was used as coarse and fine
fractions and the filler was used as hydrated lime. The behavior of the asphalt mix
composed of different combinations of RCA and natural aggregates was
determined using volumetric, indirect tensile strength, moisture damage, and
rutting properties. The results showed an increase in optimum asphalt content in
the design mixtures with an increase in the percentage of RCA. In addition, the mix
prepared with polymer-modified asphalt and combinations of RCA-NA indicates
improvement in indirect tensile strength, moisture damage resistance, and rutting
resistance properties as compared to an RCA mix prepared with virgin asphalt
binders. The inclusion of hydrated lime as filler and polymer-modified binder
enhanced the resistance to moisture damage properties of the RCA mix, irrespective
of the asphalt binders. Overall study concluded that the optimum percentage of
RCA can be considered without pre-treatment up to 50% for better performance of
asphalt mix.