Steel-fibre-reinforced self-compacting concrete with 100% recycled mixed aggregates suitable for structural applications

• Published in: Construction & building materials Vol. 156; pp. 230 - 241
• Main Authors: Ortiz, J.A., de la Fuente, A., Mena Sebastia, F., Segura, I., Aguado, A.
• Format: Journal Article Publication
• Language: English
• Published: Elsevier Ltd 15.12.2017; Elsevier B.V
• Subjects: Analysis; Enginyeria civil; Fibers; Fibres; Formigó autocompactant; Materials i estructures; Materials i estructures de formigó; Mechanical properties; Recycling; Residual stresses; Residual/internal stress; Self-compacting concrete; Self-consolidating concrete; Steel; Àrees temàtiques de la UPC; Spain; Fibres; Mechanical properties; Self-compacting concrete; Residual/internal stress; Recycling
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2017.08.188

•New experimental material consisting of SFRSCC with 100% recycled mixed aggregates.•Pre-saturation was found the most effective method.•The additive content was not enough to prevent water absorption by the aggregates.•Design oriented to applications with limited structural performance.•Compressive strength make this material suitable for structural elements. This research focuses on designing and characterizing steel-fibre-reinforced self-compacting concrete using recycled aggregates (SFR-SCC-RA). Six different concrete dosages have been designed, and two extensive mechanical and physical characterization programs have been conducted. The first program was developed in a concrete production plant to verify the compatibility of the new material with the existing production systems. The second program was developed in a laboratory under controlled temperature and humidity conditions. Although compressive strengths greater than 25N/mm2 have been reached (which allows the material to be classified as structural), the design in this initial phase is oriented to applications with limited mechanical requirements (e.g., foundations, earth retaining walls and pavements, in which design forces are moderate).