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Open AccessArticle

Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags

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Department of Construction, University of Burgos, 09001 Burgos, Spain
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Department of Civil, Environmental and Architectural Engineering (ICEA), University of Padua, 35131 Padua, Italy
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Department of Civil Engineering, University of Burgos, 09001 Burgos, Spain
*
Author to whom correspondence should be addressed.
Materials 2019, 12(20), 3306; https://doi.org/10.3390/ma12203306
Received: 6 September 2019 / Revised: 1 October 2019 / Accepted: 7 October 2019 / Published: 11 October 2019
(This article belongs to the Special Issue Recent Research in the Design of New Sustainable Building Materials)
Electric arc furnace slag (EAFS) and ladle furnace slag (LFS) are by-products of the electric steelmaking sector with suitable properties for use in bituminous mixtures as both coarse and fine aggregates, respectively. In this research, the production of a porous asphalt mixture with an aggregate skeleton consisting exclusively of electric steelmaking slags (using neither natural aggregates nor fillers) is explored. The test program examines the asphalt mixtures in terms of their mechanical performance (abrasion loss and indirect tensile strength), durability (cold abrasion loss, aging, and long-term behavior), water sensitivity, skid and rutting resistance, and permeability. The results of the slag-mixes are compared with a standard mix, manufactured with siliceous aggregates and cement as filler. The porous mixes manufactured with the slags provided similar results to the conventional standard mixtures. Some issues were noted in relation to compaction difficulties and the higher void contents of the slag mixtures, which reduced their resistance to raveling. Other features linked to permeability and skid resistance were largely improved, suggesting that these mixtures are especially suitable for permeable pavements in rainy regions. In conclusion, a porous asphalt mixture was produced with 100% slag aggregates that met current standards for long-lasting and environmentally friendly mixtures. View Full-Text
Keywords: steel slag; ladle furnace slag; electric arc furnace slag; porous asphalt; permeable pavement; waste management steel slag; ladle furnace slag; electric arc furnace slag; porous asphalt; permeable pavement; waste management
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MDPI and ACS Style

Skaf, M.; Pasquini, E.; Revilla-Cuesta, V.; Ortega-López, V. Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags. Materials 2019, 12, 3306.

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