TY - JOUR
T1 - Mutual compatibility aspects and rheological assessment of (modified) lignin–bitumen blends as potential binders for asphalt
AU - Nahar, Sayeda
AU - Slaghek, Ted M.
AU - van Vliet, Dave
AU - Haaksman, Ingrid K.
AU - Gosselink, Richard J.A.
PY - 2023/10/3
Y1 - 2023/10/3
N2 - Recent innovations in pavement engineering are driven by sustainability and circularity. Bitumen is a fossil fuel-based binder, traditionally used for asphalt pavement. In recent years, variation in bitumen quality and consistency have raised concerns in performance and workability. To achieve the sustainability target and ensure the quality, the market is exploring renewable alternatives to bitumen: such as lignin. A partial (i.e., 25 wt.%) replacement of bitumen with native and chemically modified lignin is evaluated in this study where the influence of chemical modification, compatibility and rheological properties of the lignin-bitumen blends are assessed. By introducing lignin into bitumen, the binder becomes stiffer depending on the extent and type of modification. An exception is observed in lignin modified with ethyl hexyl glycidyl ether resulting in a comparable viscoelastic property to the original bitumen. The blends show an improvement in the high-temperature properties and introduce more flexibility to the lowtemperature properties. The influence of molecular fractions, i.e., SARA and acid value of bitumen are evaluated in relation to compatibility.
AB - Recent innovations in pavement engineering are driven by sustainability and circularity. Bitumen is a fossil fuel-based binder, traditionally used for asphalt pavement. In recent years, variation in bitumen quality and consistency have raised concerns in performance and workability. To achieve the sustainability target and ensure the quality, the market is exploring renewable alternatives to bitumen: such as lignin. A partial (i.e., 25 wt.%) replacement of bitumen with native and chemically modified lignin is evaluated in this study where the influence of chemical modification, compatibility and rheological properties of the lignin-bitumen blends are assessed. By introducing lignin into bitumen, the binder becomes stiffer depending on the extent and type of modification. An exception is observed in lignin modified with ethyl hexyl glycidyl ether resulting in a comparable viscoelastic property to the original bitumen. The blends show an improvement in the high-temperature properties and introduce more flexibility to the lowtemperature properties. The influence of molecular fractions, i.e., SARA and acid value of bitumen are evaluated in relation to compatibility.
U2 - 10.1080/14680629.2022.2146602
DO - 10.1080/14680629.2022.2146602
M3 - Article
SN - 1468-0629
VL - 24
SP - 2379
EP - 2392
JO - Road Materials and Pavement Design
JF - Road Materials and Pavement Design
IS - 10
ER -
