Alkali activation of recycled ceramic aggregates from construction and demolition wastes
Environmental concerns are becoming increasingly more significant worldwide, thus creating the urgent need for new sustainable alternatives in the industrial sector. The present study assesses the fundamental properties of ceramic residue (CR) originated by demolition operations, specifically, the f...
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2020-09-01
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doaj-9b8d59373a724179b28ec72e850a724f2021-05-05T07:36:25ZengConsejo Superior de Investigaciones CientíficasMateriales de Construccion0465-27461988-32262020-09-0170339e222e22210.3989/mc.2020.136192219Alkali activation of recycled ceramic aggregates from construction and demolition wastesN. Gaibor0https://orcid.org/0000-0002-0003-8901J. Coelho1https://orcid.org/0000-0002-9959-4907D. Leitão2https://orcid.org/0000-0003-0841-7954T. Miranda3https://orcid.org/0000-0003-4054-6860P. Tavares4N. Cristelo5https://orcid.org/0000-0002-3600-1094CTAC, Department of Civil Engineering, Azurém Campus, University of MinhoSchool of Engineering of the University of MinhoCTAC, Department of Civil Engineering, Azurém Campus, University of MinhoISISE, Institute for Science and Innovation for Bio-Sustainability (IB-S), Department of Civil Engineering, University of MinhoCQ-VR, Centro de Química - Vila Real, Department of Chemistry, University of Trás-os-Montes e Alto DouroCQ-VR, Centro de Química - Vila Real, Department of Engineering, University of Trás-os-Montes e Alto DouroEnvironmental concerns are becoming increasingly more significant worldwide, thus creating the urgent need for new sustainable alternatives in the industrial sector. The present study assesses the fundamental properties of ceramic residue (CR) originated by demolition operations, specifically, the floor and wall tiles and sanitaryware furniture, for further incorporation in the construction sector, namely in alkali-activated binders, mixed with other better-known precursors - fly ash (FA) and ladle furnace slag (LFS). Different CR/FA and CR/LFS weight ratios were considered and analyzed by mechanical behavior and microstructural analysis, which included uniaxial compression strength (UCS) tests, Scanning Electron Microscopy (SEM), X-ray Energy Dispersive Analyser (EDX), X-ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). Results obtained showed that the combination of CR and FA or LFS, activated with sodium silicate, produced UCS values higher than 20 MPa and 59 MPa, respectively, after 90 days curing.http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2296ceramicalkali-activated cementwaste treatmentmechanical propertiesphysical properties |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
N. Gaibor J. Coelho D. Leitão T. Miranda P. Tavares N. Cristelo |
spellingShingle |
N. Gaibor J. Coelho D. Leitão T. Miranda P. Tavares N. Cristelo Alkali activation of recycled ceramic aggregates from construction and demolition wastes Materiales de Construccion ceramic alkali-activated cement waste treatment mechanical properties physical properties |
author_facet |
N. Gaibor J. Coelho D. Leitão T. Miranda P. Tavares N. Cristelo |
author_sort |
N. Gaibor |
title |
Alkali activation of recycled ceramic aggregates from construction and demolition wastes |
title_short |
Alkali activation of recycled ceramic aggregates from construction and demolition wastes |
title_full |
Alkali activation of recycled ceramic aggregates from construction and demolition wastes |
title_fullStr |
Alkali activation of recycled ceramic aggregates from construction and demolition wastes |
title_full_unstemmed |
Alkali activation of recycled ceramic aggregates from construction and demolition wastes |
title_sort |
alkali activation of recycled ceramic aggregates from construction and demolition wastes |
publisher |
Consejo Superior de Investigaciones Científicas |
series |
Materiales de Construccion |
issn |
0465-2746 1988-3226 |
publishDate |
2020-09-01 |
description |
Environmental concerns are becoming increasingly more significant worldwide, thus creating the urgent need for new sustainable alternatives in the industrial sector. The present study assesses the fundamental properties of ceramic residue (CR) originated by demolition operations, specifically, the floor and wall tiles and sanitaryware furniture, for further incorporation in the construction sector, namely in alkali-activated binders, mixed with other better-known precursors - fly ash (FA) and ladle furnace slag (LFS). Different CR/FA and CR/LFS weight ratios were considered and analyzed by mechanical behavior and microstructural analysis, which included uniaxial compression strength (UCS) tests, Scanning Electron Microscopy (SEM), X-ray Energy Dispersive Analyser (EDX), X-ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). Results obtained showed that the combination of CR and FA or LFS, activated with sodium silicate, produced UCS values higher than 20 MPa and 59 MPa, respectively, after 90 days curing. |
topic |
ceramic alkali-activated cement waste treatment mechanical properties physical properties |
url |
http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2296 |
work_keys_str_mv |
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1721468644146282496 |