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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.12 [2005] >
IJEMS Vol.12(5) [October 2005] >
| Title: | Effects of high density polyethylene on the permanent deformation of asphalt concrete |
| Authors: | Hinislioğlu, Sinan
Aras, Hatice Nur
Bayrak, Osman Ünsal |
| Issue Date: | Oct-2005 |
| Publisher: | CSIR |
| IPC Code: | C04B 26/00 |
| Abstract: |
This paper reports an investigation about
the effect of high density polyethylene (HDPE) in powder form as a bitumen
modifier on the permanent deformation of asphalt concrete using Marshall design
parameters and creep behaviour. The parameters assessed are the compacted mix
density, the percentage of air voids in the mixture, the percentage of void in
the mineral aggregate, the percentage of voids filled with bitumen, Marshall
stability and flow and also Marshall quotient (MQ), axial strain and stiffness
modulus. It is also investigated
the effect of HDPE on some physical properties such as penetration, softening
point and ductility. Bitumen is mixed with the HDPE at
1-4% by weight of bitumen at 185°C for
60 min. duration using a high shear mixer. Marshall samples prepared with the HDPE
modified binder provide the specification limits. The addition of 3% HDPE,
results in an increase of 57% in Marshall
quotient. In addition, it has been observed that the use of 2% HDPE decreased the
permanent strain by 34% and increased the creep stiffness by 52%. The creep
recovery values of the asphalt concrete with HDPE after 15 min have been found
to be higher than control mixtures. It can be concluded that HDPE modified
asphaltic binders provide better resistance against permanent deformation,
because of their higher stability and stiffness, relatively lower flow. As a
result, HDPE modified asphaltic binders are considered to be very useful in
mitigating permanent deformation in hot climate regions.
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| Page(s): | 456-460 |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.12(5) [October 2005]
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