ELECTRIC ARC FURNACE SLAG AND ITS USE IN HYDRAULIC CONCRETE

Idoia Arribas, Amaia Santamaria, Estela Ruiz, Vanesa Ortega-Lopez, Juan M. Manso

Research output: Contribution to journalArticlepeer-review

161 Citations (Scopus)

Abstract

Electric arc furnace oxidizing slag (EAFS) is a by-product of the steelmaking industry, generated after the melting and the preliminary acid refining of liquid steel. It is a stony material that is easy to crush for use as aggregate in concrete mixes. This study examines the long-term aging reactions of EAFS and its volumetric stability, to gain further knowledge of this by-product, its behaviour as a construction material, and its inherent risk of swelling. Additionally, the good compressive strength of hydraulic mixes that incorporate this slag can be analyzed and explained on the basis of its steady and expansive compounds and its chemical evolution over time in the interfacial transition zone (ITZ); the appearance of calcium carbonate enhances the cohesiveness, stiffness and strength of this zone and, as a consequence, of the hydraulic concrete
Original languageEnglish
Pages (from-to)68-79
Number of pages12
Journalunknown
Volumeunknown
DOIs
Publication statusPublished - 15 Aug 2015

Keywords

  • Electric arc furnace oxidizing slag
  • Expansive compounds
  • Slag weathering
  • Accelerated aging
  • Recycled aggregate
  • Hydraulic concrete
  • Interfacial transition zone
  • ITZ

Project and Funding Information

  • Funding Info
  • Basque Regional Government, Basque Country University (UPV/EHU), MICINN

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