Shear transfer in fly ash concrete with electric arc furnace aggregates

Author:

Faleschini Flora12,Trento Daniel1,Ortega-López Vanesa3,Zanini Mariano Angelo1

Affiliation:

1. Department of Civil, Environmental and Architectural Engineering, University of Padova, Padova, Italy

2. Department of Industrial Engineering, University of Padova, Padova, Italy (corresponding author: )

3. Department of Civil Engineering, Escuela Politécnica Superior, University of Burgos, Burgos, Spain

Abstract

The friction shear behaviour of concrete containing electric arc furnace (EAF) slag (hereafter called EAFC) was experimentally evaluated and compared with a reference counterpart made with only natural aggregates. Two concrete mixes were cast, both containing a cement blended with 30% fly ash to improve their sustainability. For each mix, other than analysing the main mechanical properties (compressive strength, tensile strength and elastic modulus), push-off specimens were tested to determine the shear strength, failure modes, stress–slip and stress–crack opening curves. There was a clearly enhancement in the shear strength of EAFC compared with the reference concrete, even though the relations between shear strength and tensile strength were similar for the two concretes. The results were also compared with data from the literature pertaining to ordinary concrete and recycled aggregate concrete. Existing models from both design codes and the literature were applied to the experimental results and conservative predictions were obtained in all cases. The safety margin for the EAFC was found to be higher than that for the reference concrete.

Publisher

Thomas Telford Ltd.

Subject

General Materials Science,Building and Construction,Civil and Structural Engineering

Reference54 articles.

1. Performance of concrete mixtures made with electric arc furnace (EAF) steel slag aggregate produced in the Arabian Gulf region

2. ACI (American Concrete Institute) (2019) ACI 318-19: Building code requirements for structural concrete and commentary on building code requirements for structural concrete. ACI, Farmington Hills, MI, USA.

3. Electric arc furnace slag and its use in hydraulic concrete

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