TY - JOUR
T1 - Laboratory performance of dense graded asphalt mixtures prepared using highly polymer modified binders containing corn oil as softening agent
AU - Ali, Ayman
AU - Kabir, Sk Faisal
AU - Al-Badr, Basel
AU - Alfalah, Ahmad
AU - Xie, Zhaoxing
AU - Decarlo, Christopher
AU - Elshaer, Mohamed
AU - Mehta, Yusuf
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/8/22
Y1 - 2022/8/22
N2 - This study evaluated the impact of aging on High Polymer Modified Asphalt (HPMA) mixtures containing a softening agent (SA). The aging susceptibility was evaluated in terms of rutting, cracking, and durability. Four asphalt mixtures were prepared, one with PG 52–34 binder as control, and three others using modified PG 52–34 with varying dosages of Styrene Butadiene Styrene (SBS) and corn oil (SA). The tests performed to evaluate the impact of aging (short, long, extended long term) were the Dynamic Complex Modulus, Hamburg Wheel Tracking, Flow Number, Indirect Tension and semi-Circular Bend tests. Based on these testing results, SBS and SA increased the durability and rutting resistance of asphalt mixtures. Modified asphalt mixtures also showed better cracking resistance than the control mix (i.e. lowering of crack propagation). However, with aging, fatigue cracking performance diminished while remaining comparable to the control mix. A balanced dosage of SBS (7.5%) and SA (7%) led to the best improvement in durability, rutting, and short-term cracking performance.
AB - This study evaluated the impact of aging on High Polymer Modified Asphalt (HPMA) mixtures containing a softening agent (SA). The aging susceptibility was evaluated in terms of rutting, cracking, and durability. Four asphalt mixtures were prepared, one with PG 52–34 binder as control, and three others using modified PG 52–34 with varying dosages of Styrene Butadiene Styrene (SBS) and corn oil (SA). The tests performed to evaluate the impact of aging (short, long, extended long term) were the Dynamic Complex Modulus, Hamburg Wheel Tracking, Flow Number, Indirect Tension and semi-Circular Bend tests. Based on these testing results, SBS and SA increased the durability and rutting resistance of asphalt mixtures. Modified asphalt mixtures also showed better cracking resistance than the control mix (i.e. lowering of crack propagation). However, with aging, fatigue cracking performance diminished while remaining comparable to the control mix. A balanced dosage of SBS (7.5%) and SA (7%) led to the best improvement in durability, rutting, and short-term cracking performance.
UR - http://www.scopus.com/inward/record.url?scp=85133895478&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85133895478&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2022.128336
DO - 10.1016/j.conbuildmat.2022.128336
M3 - Article
AN - SCOPUS:85133895478
SN - 0950-0618
VL - 345
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 128336
ER -