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Utilization of alkali-activated copper slag as binder in concrete

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Abstract

This study was focused on developing concrete using alkali-activated copper slag (AACS) as a binder. The properties of alkali-activated copper slag concrete (AACSC) were compared with portland cement concrete (PCC). Different AACSC mixes were prepared with varying Na2O dosage (6% and 8% of the binder by weight) and curing methods. Hydration products in AACSC were retrieved using Fourier-transform infrared spectroscopy (FTIR) and X-ray powder diffraction (XRD) techniques. The test results indicate that the workability of AACSC was lesser than that of PCC. The AACSC mix with 6% Na2O dosage has exhibited similar mechanical properties as that of PCC. The mechanical properties of AACSC were higher than PCC when 8% of Na2O dosage was used. Heat curing was effective to upgrade the strength properties of AACSC at an early age of curing, but at a later age mechanical properties of ambient cured and heat-cured AACSC were comparable. The hydration products of AACSC were not identified in XRD patterns, whereas, in FTIR spectra of AACSC some alkali-activated reaction products were reflected. The AACSC mixes were found to be more sustainable than PCC. It has been concluded that AACSC can be produced similarly to that of PCC and ambient curing is sufficient.

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Acknowledgements

The authors acknowledge financial assistance in the form of a fellowship to the first author from the Ministry of Human Resource Development (MHRD), Government of India.

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  1. Department of Civil Engineering, Dr. B R Ambedkar National Institute of Technology, Jalandhar, 144011, India

    Jagmeet Singh & S. P. Singh

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  1. Jagmeet Singh
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  2. S. P. Singh
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Correspondence to S. P. Singh.

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Singh, J., Singh, S.P. Utilization of alkali-activated copper slag as binder in concrete. Front. Struct. Civ. Eng. 15, 773–780 (2021). https://doi.org/10.1007/s11709-021-0722-z

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