The feasibility of using copper slag in asphalt mixtures for base and surface layers based on laboratory results
Abstract
This study aims to assess the feasibility of using copper slag (CS) in asphalt mixtures in both the surface and base
layers of road pavements. For this purpose, two sets of asphalt mixtures with different CS content (15 and 30%)
and fraction sizes (0/8 and 0/16 mm) were prepared. The optimal binder content of each mixture was determined
using the Marshall mix design method. Their laboratory performances were investigated and compared
with the properties of reference asphalt mixtures, i.e. mixtures consisting exclusively of virgin materials. Test
results showed that adding CS to the mixture for the surface layer improved stiffness and rutting resistance and
had almost no negative impacts on the remaining properties apart from cracking resistance. Further, the addition
of CS to the base-layer mixture improved cracking resistance, but negatively affected stiffness, rutting and fatigue
resistance. In both cases, adding CS did not influence the strength, water sensitivity or freeze–...thaw resistance.
From a leaching perspective, the results showed that leachates gathered from the asphalt mixtures designed for
the surface layer did not contain heavy metals. Overall, it can be concluded that CS has a potential to be used as
an appropriate aggregate substitute for virgin aggregates in asphalt mixtures for both surface and base layers.
Keywords:
Waste material / Secondary material / Aggregate replacement / Asphalt leaching / Cracking resistance / Fatigue resistance / Rutting resistance / Freeze–thaw resistance / Water sensitivity / StiffnessSource:
Construction and Building Materials, 2023, 38Publisher:
- Construction and Building Materials - Elsevier
Funding / projects:
- IDEAS Program of the Science Fund of the Republic of Serbia, Project ID:7737365, Ø-Waste-Water.
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200092 (University of Belgrade, Faculty of Civil Engineering) (RS-MESTD-inst-2020-200092)
Collections
Institution/Community
GraFarTY - JOUR AU - Orešković, Marko AU - Santos, Joao AU - Mladenović, Goran AU - Rajaković-Ognjanović, Vladana PY - 2023 UR - https://grafar.grf.bg.ac.rs/handle/123456789/3171 AB - This study aims to assess the feasibility of using copper slag (CS) in asphalt mixtures in both the surface and base layers of road pavements. For this purpose, two sets of asphalt mixtures with different CS content (15 and 30%) and fraction sizes (0/8 and 0/16 mm) were prepared. The optimal binder content of each mixture was determined using the Marshall mix design method. Their laboratory performances were investigated and compared with the properties of reference asphalt mixtures, i.e. mixtures consisting exclusively of virgin materials. Test results showed that adding CS to the mixture for the surface layer improved stiffness and rutting resistance and had almost no negative impacts on the remaining properties apart from cracking resistance. Further, the addition of CS to the base-layer mixture improved cracking resistance, but negatively affected stiffness, rutting and fatigue resistance. In both cases, adding CS did not influence the strength, water sensitivity or freeze–thaw resistance. From a leaching perspective, the results showed that leachates gathered from the asphalt mixtures designed for the surface layer did not contain heavy metals. Overall, it can be concluded that CS has a potential to be used as an appropriate aggregate substitute for virgin aggregates in asphalt mixtures for both surface and base layers. PB - Construction and Building Materials - Elsevier T2 - Construction and Building Materials T1 - The feasibility of using copper slag in asphalt mixtures for base and surface layers based on laboratory results VL - 38 DO - 10.1016/j.conbuildmat.2023.131285 ER -
@article{ author = "Orešković, Marko and Santos, Joao and Mladenović, Goran and Rajaković-Ognjanović, Vladana", year = "2023", abstract = "This study aims to assess the feasibility of using copper slag (CS) in asphalt mixtures in both the surface and base layers of road pavements. For this purpose, two sets of asphalt mixtures with different CS content (15 and 30%) and fraction sizes (0/8 and 0/16 mm) were prepared. The optimal binder content of each mixture was determined using the Marshall mix design method. Their laboratory performances were investigated and compared with the properties of reference asphalt mixtures, i.e. mixtures consisting exclusively of virgin materials. Test results showed that adding CS to the mixture for the surface layer improved stiffness and rutting resistance and had almost no negative impacts on the remaining properties apart from cracking resistance. Further, the addition of CS to the base-layer mixture improved cracking resistance, but negatively affected stiffness, rutting and fatigue resistance. In both cases, adding CS did not influence the strength, water sensitivity or freeze–thaw resistance. From a leaching perspective, the results showed that leachates gathered from the asphalt mixtures designed for the surface layer did not contain heavy metals. Overall, it can be concluded that CS has a potential to be used as an appropriate aggregate substitute for virgin aggregates in asphalt mixtures for both surface and base layers.", publisher = "Construction and Building Materials - Elsevier", journal = "Construction and Building Materials", title = "The feasibility of using copper slag in asphalt mixtures for base and surface layers based on laboratory results", volume = "38", doi = "10.1016/j.conbuildmat.2023.131285" }
Orešković, M., Santos, J., Mladenović, G.,& Rajaković-Ognjanović, V.. (2023). The feasibility of using copper slag in asphalt mixtures for base and surface layers based on laboratory results. in Construction and Building Materials Construction and Building Materials - Elsevier., 38. https://doi.org/10.1016/j.conbuildmat.2023.131285
Orešković M, Santos J, Mladenović G, Rajaković-Ognjanović V. The feasibility of using copper slag in asphalt mixtures for base and surface layers based on laboratory results. in Construction and Building Materials. 2023;38. doi:10.1016/j.conbuildmat.2023.131285 .
Orešković, Marko, Santos, Joao, Mladenović, Goran, Rajaković-Ognjanović, Vladana, "The feasibility of using copper slag in asphalt mixtures for base and surface layers based on laboratory results" in Construction and Building Materials, 38 (2023), https://doi.org/10.1016/j.conbuildmat.2023.131285 . .