Recently, the use of carbon-neutral biomaterials as modifiers, extenders, or alternatives to fossil-based binders has increasingly gained attention. In this study, five biomaterials derived from the pyrolysis process of different biomass sources were used as binder extenders to partially replace a traditional fossil-based binder. The biomaterials, suitably modified, were mixed together with a plain binder at a percentage of 20% by total weight with a high-shear mixer to produce five different biobased binders. Various tests, including storage stability and dynamic shear rheometer (DSR) tests, were carried out to determine the viscosity and the rheological properties of the biomaterials and biobased binders. The results indicated that the biomaterials investigated can be classified into two groups: one group is characterized by high viscosity and a high stiffening effect on the plain binder and the other group has no significant effect on the investigated properties compared to the plain binder. Moreover, a particular stable biomaterial has been identified as having the potential to be used as a partial substitute for fossil-based binders.
Experimental Characterization of Different Bio-extenders and Biobased Binders
Chiara Riccardi
Primo
Conceptualization
;Pietro LeandriSecondo
Writing – Review & Editing
;Massimo LosaUltimo
Writing – Review & Editing
;
2024-01-01
Abstract
Recently, the use of carbon-neutral biomaterials as modifiers, extenders, or alternatives to fossil-based binders has increasingly gained attention. In this study, five biomaterials derived from the pyrolysis process of different biomass sources were used as binder extenders to partially replace a traditional fossil-based binder. The biomaterials, suitably modified, were mixed together with a plain binder at a percentage of 20% by total weight with a high-shear mixer to produce five different biobased binders. Various tests, including storage stability and dynamic shear rheometer (DSR) tests, were carried out to determine the viscosity and the rheological properties of the biomaterials and biobased binders. The results indicated that the biomaterials investigated can be classified into two groups: one group is characterized by high viscosity and a high stiffening effect on the plain binder and the other group has no significant effect on the investigated properties compared to the plain binder. Moreover, a particular stable biomaterial has been identified as having the potential to be used as a partial substitute for fossil-based binders.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.