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Titre
Mechanical performance of sustainable asphalt mixtures manufactured with copper slag and high percentages of reclaimed asphalt pavement
Autor(es)
Sujet
Copper slag
Reclaimed Asphalt Pavement
Macrotexture
Moisture sensitivity
Fatigue
Rutting
Clasificación UNESCO
3305.29 Construcción de Carreteras
3321.01 Materiales Asfálticos
3312.90 Materiales Metalúrgicos Avanzados
Fecha de publicación
2021-10-18
Citación
Muñoz-Cáceres, O., Raposeiras, A. C., Movilla-Quesada, D., Castro-Fresno, D., Lagos-Varas, M., Andrés-Valeri, V. C., & Valdés-Vidal, G. (2021). Mechanical performance of sustainable asphalt mixtures manufactured with copper slag and high percentages of reclaimed asphalt pavement. Construction and Building Materials, 304, 124653. doi:10.1016/j.conbuildmat.2021.124653
Resumen
[EN] The use of reclaimed asphalt pavement (RAP) in the construction of hot mix asphalt (HMA) pavements is a
widely used alternative in the development of sustainable road infrastructure. For this reason, the use of higher
RAP contents continues to be a topic of interest. This study evaluated the performance of semi-dense asphalt
mixtures incorporating 50% to 70% RAP and 7.5% and 15% copper slag (CS) as partial replacement of aggregate,
to determine the influence of CS on the effective increase of RAP in the design of sustainable asphalt mixtures.
The mixtures were evaluated using macrotexture, fatigue strengths, water sensitivity, and the Hamburg wheel
tracking test. The results show that the use of RAP improves the permanent deformation resistance (RD) and
fatigue life of the mixtures, while the mean texture depth (MTD) and indirect tensile strength ratio (ITSR)
decrease. The incorporation of CS in the mixtures with RAP improved MTD and ITSR compared to the mixtures
including only RAP and allowed higher RAP contents in fatigue and Hamburg wheel tests without showing a
negative influence.
Description
Fuente: Construction and Building Materials
URI
ISSN
0950-0618
DOI
10.1016/j.conbuildmat.2021.124653
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3.710Mo
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