This paper presents the results of an experimental investigation carried out with the aim of evaluating the performance-related properties of rubberized asphalt mixtures containing municipal solid waste bottom ashes in partial substitution of natural aggregates. Performed laboratory tests focused on the determination of workability, visco-elastic characteristics, anti-rutting potential and resistance to crack propagation. Tests were carried out by considering an Ash-Amended Rubberized Asphalt Mixture (AARM) and, for comparison purposes, a standard Gap-Graded Rubberized Mixture (GGRM). Obtained results indicate that the rubberized mixture containing bottom ashes exhibited lower workability, reduced stiffness, and decreased anti-rutting potential with respect to the standard gap-graded rubberized mixture. Conversely, addition of bottom ashes was found to provide beneficial effects in terms of resistance to crack propagation. These outcomes suggest that use of municipal solid waste bottom ashes must be carefully considered, since environmental benefits may be counterbalanced by a lower performance.

Use of municipal solid waste bottom ashes in rubberized asphalt mixtures / Riviera, PIER PAOLO; Santagata, Ezio; Baglieri, Orazio. - ELETTRONICO. - (2022), pp. 1-6. (Intervento presentato al convegno International Symposium of Asphalt Pavements tenutosi a Costa Rica nel 25-27 Ottobre 2022).

Use of municipal solid waste bottom ashes in rubberized asphalt mixtures

Riviera Pier Paolo;Ezio Santagata;Baglieri Orazio
2022

Abstract

This paper presents the results of an experimental investigation carried out with the aim of evaluating the performance-related properties of rubberized asphalt mixtures containing municipal solid waste bottom ashes in partial substitution of natural aggregates. Performed laboratory tests focused on the determination of workability, visco-elastic characteristics, anti-rutting potential and resistance to crack propagation. Tests were carried out by considering an Ash-Amended Rubberized Asphalt Mixture (AARM) and, for comparison purposes, a standard Gap-Graded Rubberized Mixture (GGRM). Obtained results indicate that the rubberized mixture containing bottom ashes exhibited lower workability, reduced stiffness, and decreased anti-rutting potential with respect to the standard gap-graded rubberized mixture. Conversely, addition of bottom ashes was found to provide beneficial effects in terms of resistance to crack propagation. These outcomes suggest that use of municipal solid waste bottom ashes must be carefully considered, since environmental benefits may be counterbalanced by a lower performance.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2965961