The replacement of slag cement with limestone and calcined clay (LC2) is beneficial to expand the sources of SCMs and reduce CO2 emissions in the global cement industry. In this paper, the synergistic interactions between slag cement and LC2 are studied using multi-technique characterization including TGA, XRD and SEM. The results indicate that the addition of LC2 enhanced both compressive and flexural strength of slag cement mortars. Characterization of the microstructures show LC2 can optimize the phase assemblages of slag cement by stabilizing ettringite whilst promoting the formation of hemicarboaluminate and monocarboaluminate. It is concluded that faster reaction of calcined clay and nucleation effect of limestone compensate for the slow early hydration of slag cement whilst slag contributes to the later performance. The synergistic hydration effects of slag and LC2 offers unique opportunities to reduce CO2 footprint without compromising early and long-term performances. (C) 2021 Elsevier Ltd. All rights reserved.
机构:
Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
Ali, Hafiz Asad
Xuan, Dongxing
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Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
Xuan, Dongxing
Poon, Chi Sun
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Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
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Univ Cent Las Villas, Ctr Estudios Quim Aplicada, Santa Clara 54830, CubaUniv Cent Las Villas, Ctr Estudios Quim Aplicada, Santa Clara 54830, Cuba
Alujas, Adrian
Fernandez, Rodrigo
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Ecole Polytech Fed Lausanne, IMX, Lab Construct Mat, CH-1015 Lausanne, SwitzerlandUniv Cent Las Villas, Ctr Estudios Quim Aplicada, Santa Clara 54830, Cuba
Fernandez, Rodrigo
Quintana, Rafael
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Univ Cent Las Villas, Ctr Invest Soldadura, Santa Clara 54830, CubaUniv Cent Las Villas, Ctr Estudios Quim Aplicada, Santa Clara 54830, Cuba
Quintana, Rafael
Scrivener, Karen L.
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Ecole Polytech Fed Lausanne, IMX, Lab Construct Mat, CH-1015 Lausanne, SwitzerlandUniv Cent Las Villas, Ctr Estudios Quim Aplicada, Santa Clara 54830, Cuba
Scrivener, Karen L.
Martirena, Fernando
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Univ Cent Las Villas, Ctr Invest & Desarrollo Estruct & Mat, Santa Clara 54830, CubaUniv Cent Las Villas, Ctr Estudios Quim Aplicada, Santa Clara 54830, Cuba
机构:
Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
Ali, Hafiz Asad
Xuan, Dongxing
论文数: 0引用数: 0
h-index: 0
机构:
Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
Xuan, Dongxing
Poon, Chi Sun
论文数: 0引用数: 0
h-index: 0
机构:
Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
机构:
Univ Cent Las Villas, Ctr Estudios Quim Aplicada, Santa Clara 54830, CubaUniv Cent Las Villas, Ctr Estudios Quim Aplicada, Santa Clara 54830, Cuba
Alujas, Adrian
Fernandez, Rodrigo
论文数: 0引用数: 0
h-index: 0
机构:
Ecole Polytech Fed Lausanne, IMX, Lab Construct Mat, CH-1015 Lausanne, SwitzerlandUniv Cent Las Villas, Ctr Estudios Quim Aplicada, Santa Clara 54830, Cuba
Fernandez, Rodrigo
Quintana, Rafael
论文数: 0引用数: 0
h-index: 0
机构:
Univ Cent Las Villas, Ctr Invest Soldadura, Santa Clara 54830, CubaUniv Cent Las Villas, Ctr Estudios Quim Aplicada, Santa Clara 54830, Cuba
Quintana, Rafael
Scrivener, Karen L.
论文数: 0引用数: 0
h-index: 0
机构:
Ecole Polytech Fed Lausanne, IMX, Lab Construct Mat, CH-1015 Lausanne, SwitzerlandUniv Cent Las Villas, Ctr Estudios Quim Aplicada, Santa Clara 54830, Cuba
Scrivener, Karen L.
Martirena, Fernando
论文数: 0引用数: 0
h-index: 0
机构:
Univ Cent Las Villas, Ctr Invest & Desarrollo Estruct & Mat, Santa Clara 54830, CubaUniv Cent Las Villas, Ctr Estudios Quim Aplicada, Santa Clara 54830, Cuba