TY - GEN
T1 - Synergistic Effect of CDWs as Eco-Pozzolans
T2 - 15th International Conference on Recent Advances in Concrete Technology and Sustainability Issues
AU - Vigil de la Villa, Raquel
AU - García-Giménez, Rosario
AU - Frías, Moisés
AU - Martínez Ramírez, Sagrario
AU - Fernández-Carrasco, Lucía
AU - Lahoz Ruiz, Eduardo
AU - Moreno-Juez, Jaime
AU - Vegas-Ramiro, Iñigo
N1 - Publisher Copyright:
© 2022 American Concrete Institute. All rights reserved.
PY - 2022/7/1
Y1 - 2022/7/1
N2 - Sustainable development and circular economy policies currently prioritize the recovery of industrial waste and rubble as secondary raw materials. CDWs fine fractions of concrete nature are focusing special attention due to their accumulation, subjected to weather conditions and without any industrial application at present. These wastes have little pozzolanic activity which is why it is necessary to combine it with other active additions for the ternary cements manufacture. In the present, a laminar glass waste from the deconstruction has been selected in order to obtain the binary mix. A binary mixture of pozzolan recycled concrete/glass with a 1:2 ratio has been prepared to evaluate the synergy of both wastes in the pozzolanic reaction, and its possible commercialization for future ternary cements that are more sustainable. The characterization of materials and reaction kinetics mainly in the ternary pastes have been characterized by XRF, ICP/MS, NMR, FTIR, XRD-Rietveld and SEM/EDX, detecting calcite, quartz, mica, feldspar and clay minerals and as hydrated phases ettringite, aluminates and C-S-H gels. According to these results, it can be highlighted that from the scientific point of view, this mixture of pozzolans from CDWs are viable for use as ecoefficient pozzolans for the more sustainable ternary cements.
AB - Sustainable development and circular economy policies currently prioritize the recovery of industrial waste and rubble as secondary raw materials. CDWs fine fractions of concrete nature are focusing special attention due to their accumulation, subjected to weather conditions and without any industrial application at present. These wastes have little pozzolanic activity which is why it is necessary to combine it with other active additions for the ternary cements manufacture. In the present, a laminar glass waste from the deconstruction has been selected in order to obtain the binary mix. A binary mixture of pozzolan recycled concrete/glass with a 1:2 ratio has been prepared to evaluate the synergy of both wastes in the pozzolanic reaction, and its possible commercialization for future ternary cements that are more sustainable. The characterization of materials and reaction kinetics mainly in the ternary pastes have been characterized by XRF, ICP/MS, NMR, FTIR, XRD-Rietveld and SEM/EDX, detecting calcite, quartz, mica, feldspar and clay minerals and as hydrated phases ettringite, aluminates and C-S-H gels. According to these results, it can be highlighted that from the scientific point of view, this mixture of pozzolans from CDWs are viable for use as ecoefficient pozzolans for the more sustainable ternary cements.
KW - Binary pozzolan mix
KW - Construction and demolition wastes
KW - Reaction kinetics
KW - Ternary blended cement
UR - http://www.scopus.com/inward/record.url?scp=85139754299&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85139754299
T3 - American Concrete Institute, ACI Special Publication
SP - 485
EP - 494
BT - Recent Advances in Concrete Technology and Sustainability Issues - Conference Proceedings, 15th International Conference
A2 - Coffetti, Denny
A2 - Coppola, Luigi
A2 - Holland, Terence
PB - American Concrete Institute
Y2 - 13 July 2022 through 15 July 2022
ER -
