Abstract
This paper investigates the performance characteristics and workability of high reclaimed asphalt pavement (RAP) mixtures in the presence of a bio-modified binder. Accordingly mixtures with high percentages of RAP were designed with and without bio-modification to examine whether bio-modification can facilitate the incorporation of RAP. The bio-modification was performed by modifying a virgin asphalt binder with a bio-binder produced from swine manure. The four mixtures that were designed and evaluated were a control mixture incorporating virgin materials, the control mixture incorporating 40% RAP, the control mixture incorporating the bio-modified binder, and the control mixture incorporating the bio-modified binder and 40% RAP. The effect of the bio-modified binder on the stiffness and workability of the control mixture with and without RAP was evaluated by measuring the dynamic modulus and the torque resistance of the mixtures, respectively. The performance of each mixture was evaluated for fatigue cracking (overlay tester) and moisture susceptibility/rutting potential (Hamburg wheel-tracking device). Finally, the degree of blending between the virgin and RAP binders was evaluated for each mixture. The data indicated that the addition of the bio-modified binder helped reduce the stiffness of the control mixture with 40% RAP to a level closer to the stiffness of the same mixture without RAP. In addition, the presence of the bio-binder led to improving the workability of the mixtures, especially this was very evident at high-RAP content of 40%. The data indicated that the bio-modified binder improved the fatigue properties and cracking characteristics and had no negative effect on the moisture susceptibility/rutting characteristics of the control mixture with 40% RAP. Overall, data indicated that there was a good degree of blending between the virgin/bio-modified and RAP binders.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 753-767 |
| Number of pages | 15 |
| Journal | Road Materials and Pavement Design |
| Volume | 17 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jul 2 2016 |
| Externally published | Yes |
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Keywords
- bio-binder
- fatigue
- high-RAP mixture
- moisture damage
- recycled asphalt rutting
ASJC Scopus subject areas
- Civil and Structural Engineering
Cite this
Performance characteristics of high reclaimed asphalt pavement containing bio-modifier. / Mogawer, Walaa S.; Fini, Ellie H.; Austerman, Alexander J.; Booshehrian, Abbas; Zada, Boubacar.
In: Road Materials and Pavement Design, Vol. 17, No. 3, 02.07.2016, p. 753-767.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Performance characteristics of high reclaimed asphalt pavement containing bio-modifier
AU - Mogawer, Walaa S.
AU - Fini, Ellie H.
AU - Austerman, Alexander J.
AU - Booshehrian, Abbas
AU - Zada, Boubacar
PY - 2016/7/2
Y1 - 2016/7/2
N2 - This paper investigates the performance characteristics and workability of high reclaimed asphalt pavement (RAP) mixtures in the presence of a bio-modified binder. Accordingly mixtures with high percentages of RAP were designed with and without bio-modification to examine whether bio-modification can facilitate the incorporation of RAP. The bio-modification was performed by modifying a virgin asphalt binder with a bio-binder produced from swine manure. The four mixtures that were designed and evaluated were a control mixture incorporating virgin materials, the control mixture incorporating 40% RAP, the control mixture incorporating the bio-modified binder, and the control mixture incorporating the bio-modified binder and 40% RAP. The effect of the bio-modified binder on the stiffness and workability of the control mixture with and without RAP was evaluated by measuring the dynamic modulus and the torque resistance of the mixtures, respectively. The performance of each mixture was evaluated for fatigue cracking (overlay tester) and moisture susceptibility/rutting potential (Hamburg wheel-tracking device). Finally, the degree of blending between the virgin and RAP binders was evaluated for each mixture. The data indicated that the addition of the bio-modified binder helped reduce the stiffness of the control mixture with 40% RAP to a level closer to the stiffness of the same mixture without RAP. In addition, the presence of the bio-binder led to improving the workability of the mixtures, especially this was very evident at high-RAP content of 40%. The data indicated that the bio-modified binder improved the fatigue properties and cracking characteristics and had no negative effect on the moisture susceptibility/rutting characteristics of the control mixture with 40% RAP. Overall, data indicated that there was a good degree of blending between the virgin/bio-modified and RAP binders.
AB - This paper investigates the performance characteristics and workability of high reclaimed asphalt pavement (RAP) mixtures in the presence of a bio-modified binder. Accordingly mixtures with high percentages of RAP were designed with and without bio-modification to examine whether bio-modification can facilitate the incorporation of RAP. The bio-modification was performed by modifying a virgin asphalt binder with a bio-binder produced from swine manure. The four mixtures that were designed and evaluated were a control mixture incorporating virgin materials, the control mixture incorporating 40% RAP, the control mixture incorporating the bio-modified binder, and the control mixture incorporating the bio-modified binder and 40% RAP. The effect of the bio-modified binder on the stiffness and workability of the control mixture with and without RAP was evaluated by measuring the dynamic modulus and the torque resistance of the mixtures, respectively. The performance of each mixture was evaluated for fatigue cracking (overlay tester) and moisture susceptibility/rutting potential (Hamburg wheel-tracking device). Finally, the degree of blending between the virgin and RAP binders was evaluated for each mixture. The data indicated that the addition of the bio-modified binder helped reduce the stiffness of the control mixture with 40% RAP to a level closer to the stiffness of the same mixture without RAP. In addition, the presence of the bio-binder led to improving the workability of the mixtures, especially this was very evident at high-RAP content of 40%. The data indicated that the bio-modified binder improved the fatigue properties and cracking characteristics and had no negative effect on the moisture susceptibility/rutting characteristics of the control mixture with 40% RAP. Overall, data indicated that there was a good degree of blending between the virgin/bio-modified and RAP binders.
KW - bio-binder
KW - fatigue
KW - high-RAP mixture
KW - moisture damage
KW - recycled asphalt rutting
UR - http://www.scopus.com/inward/record.url?scp=84945237390&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84945237390&partnerID=8YFLogxK
U2 - 10.1080/14680629.2015.1096820
DO - 10.1080/14680629.2015.1096820
M3 - Article
AN - SCOPUS:84945237390
VL - 17
SP - 753
EP - 767
JO - Road Materials and Pavement Design
JF - Road Materials and Pavement Design
SN - 1468-0629
IS - 3
ER -