Study of adhesion between steel slag aggregates and bitumen taking into consideration internal factors influencing moisture damage
2023
Benavides Alcívar, Julio Darío | Aponte Hernández, Diego Fernando | Barra Bizinotto, Marilda | López Montero, Teresa | Universitat Politècnica de Catalunya. Doctorat en Enginyeria de la Construcció | Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental | Universitat Politècnica de Catalunya. MATCAR - Materials de Construcció i Carreteres
Electric arc furnace slag (EAFS) has been proposed as a replacement in hot-mix asphalt. This work compares the physical-chemical-mineralogical and morphological factors involved in the moisture damage of natural aggregates and EAFS. Digital image analysis, aggregate-bitumen affinity based on 3 methods, and evaluation of water sensitivity (by indirect tensile strength ratio ITSR) tests were made. Findings showed that the sample with natural aggregates has an ITSR of 92%, and the samples with EAFS-replacement (coarse fraction) and with total EAFS-replacement exhibit 98% and 100% respectively. Our results suggest that EAFS can improve resistance to moisture damage due to positive aspects of internal factors.
Afficher plus [+] Moins [-]The first author would like to thank Generalitat de Catalunya (GENCAT) and L'Agència de Gestió d'Ajuts Universitaris i de Recerca (AGAUR) for the scholarship “Grants for the recruitment of new research staff FI 2021 (Ref: 2021 FI B00949)”. The authors would like to thanks Adec Global for the steel slags aggregates and the OHLA group for the generous donation of bitumen, granite and limestone, and filler used in this research.
Afficher plus [+] Moins [-]Peer Reviewed
Afficher plus [+] Moins [-]Postprint (author's final draft)
Afficher plus [+] Moins [-]Mots clés AGROVOC
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