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Self-Healing Potential and Phase Evolution Characterization of Ternary Cement Blends

Mohammadi, Mojtaba ; Youssef-Namnoum, Carol ; Robira, Maxime ; Hilloulin, Benoit

Materials, 2020-06, Vol.13 (11), p.2543 [Revista revisada por pares]

Basel: MDPI AG

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Título:
Self-Healing Potential and Phase Evolution Characterization of Ternary Cement Blends
Autor: Mohammadi, Mojtaba ; Youssef-Namnoum, Carol ; Robira, Maxime ; Hilloulin, Benoit
Materias: autogenous self-healing ; Blast furnace practice ; Blast furnace slags ; Calcite ; Carbon dioxide ; Cement ; Concrete ; Cracks ; Drinking water ; Engineering Sciences ; Evolution ; Formulations ; Granulation ; healing potential ; Hydration ; Life extension ; Limestone ; Materials ; Mechanical properties ; Metakaolin ; Microcracks ; Mixtures ; Morphology ; Natural resources ; Optical microscopy ; phase evolution ; Self healing materials ; Service life ; supplementary cementitious materials (SCMs) ; ternary cement blends ; Ternary systems ; X-ray diffraction
Es parte de: Materials, 2020-06, Vol.13 (11), p.2543
Descripción: The autogenous self-healing of cementitious material micro-cracks might lead to the service-life extension of structures. However, most of its aspects are still unknown. This paper investigates the self-healing capacity of ternary cement blends including metakaolin (MK), ground granulated blast-furnace slag (BFS), limestone (LS), and siliceous filler (F). Morphology and healing precipitation patterns were studied through the optical microscopy of artificial micro-cracks, global healing product mass monitoring, and XRD and TGA used to identify and quantify mineral formation. The self-healing potential index is introduced based on the mass measurements. It was found that the formulation containing 10% MK presented the highest healing potential at an early age (<28 days), while the formulations containing 20% BFS with 10% LS/F showed a higher healing potential at an older age (cracked after 28 days of curing). Calcite, C-S-H, and portlandite were found to be the main healing products alongside specific formulation-dependent compounds, and it was observed that the calcite’s relative quantity generally increased with time. Finally, the evolution of the self-healing product phases was accurately monitored through XRD and TGA measurements.
Editor: Basel: MDPI AG
Idioma: Inglés

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Self-Healing Potential and Phase Evolution Characterization of Ternary Cement Blends

Mohammadi, Mojtaba ; Youssef-Namnoum, Carol ; Robira, Maxime ; Hilloulin, Benoit

Basel: MDPI AG

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