Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Rejuvenators for Asphalt Binders Using Oil Extracted from Spent Coffee Grounds
Interest in recycling and reuse of various waste materials has been growing over the years especially with increasing environmental awareness and public health concerns. This paper explores the opportunity to recycle spent coffee grounds (SCG) as a modifier for reclaimed asphalt binders. In the scope of the study, oil extracted from SCG is incorporated at various percentages in PG 58-XX virgin and laboratory aged PG 76-XX asphalt binders. The rheological properties of the blends are characterized using dynamic shear and multiple stress creep and recovery following ASTM and AASHTO standards. Accordingly, it is observed that blending the extracted oil with asphalt restores the binder’s linear behavior and increases the softening of the blend thus altering the high temperature PG grade. Moreover, the rejuvenated aged asphalt exhibits higher strain recovery at low stress levels as compared to the control un-aged binder. This, in fact, lowers its susceptibility to permanent damage when used in asphalt concrete mixtures.
Rejuvenators for Asphalt Binders Using Oil Extracted from Spent Coffee Grounds
Interest in recycling and reuse of various waste materials has been growing over the years especially with increasing environmental awareness and public health concerns. This paper explores the opportunity to recycle spent coffee grounds (SCG) as a modifier for reclaimed asphalt binders. In the scope of the study, oil extracted from SCG is incorporated at various percentages in PG 58-XX virgin and laboratory aged PG 76-XX asphalt binders. The rheological properties of the blends are characterized using dynamic shear and multiple stress creep and recovery following ASTM and AASHTO standards. Accordingly, it is observed that blending the extracted oil with asphalt restores the binder’s linear behavior and increases the softening of the blend thus altering the high temperature PG grade. Moreover, the rejuvenated aged asphalt exhibits higher strain recovery at low stress levels as compared to the control un-aged binder. This, in fact, lowers its susceptibility to permanent damage when used in asphalt concrete mixtures.
Rejuvenators for Asphalt Binders Using Oil Extracted from Spent Coffee Grounds
Jalkh, Rita (Autor:in) / Abiad, Mohamad (Autor:in) / Chehab, Ghassan R. (Autor:in)
Geo-Chicago 2016 ; 2016 ; Chicago, Illinois
Geo-Chicago 2016 ; 666-676
08.08.2016
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Rejuvenators for Asphalt Binders Using Oil Extracted from Spent Coffee Grounds
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