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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Enhancing the self-sensing and energy storage capabilities of cementitious composites through marine sand doping
AU - Almotlaq, T.
AU - Huang, B.
AU - Saafi, M.
AU - Ye, J.
PY - 2024/5/17
Y1 - 2024/5/17
N2 - In this paper, for the first time, we investigate the inherent ionic conductivity of seawater-based cementitious composites containing marine sand aggregates, when air cured over 28 days with the objective of uncovering new functionalities. Electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and density functional theory (DFT) were employed to elucidate the ionic conduction mechanisms in this material system and characterize its stress self-sensing and electrochemical charge retention capabilities. The results revealed that the marine aggregates are not ionic conductive materials; however, they facilitate improved electrochemical response through enhanced formation of highly ion-exchanging calcium-silicate-hydrate (C-S-H) phases, coupled with integrated porous channels that enable sustained ion mobility despite drying. This synergistic ion transport yielded a bulk ionic resistivity around 25 kΩ⊡cm at room temperature, which lies in typical ranges seen in solid-state electrolytes for battery systems. Controlled compressive loading indicates appreciable self-sensing capacity at low-stress levels, suggesting applicability to detect the onset of mechanical damage. Negligible charge leakage upon 28 days of curing further demonstrates the electrical energy storage potential of the sea-based cement. By harnessing locally available seawater and marine sand resources to develop ionic conductive cementitious composites, this work provides the framework to optimize durable multifunctionality for sensing and electrical energy storage in reinforced concrete infrastructure. This in return improves the sustainability and energy efficiency of the built environment.
AB - In this paper, for the first time, we investigate the inherent ionic conductivity of seawater-based cementitious composites containing marine sand aggregates, when air cured over 28 days with the objective of uncovering new functionalities. Electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and density functional theory (DFT) were employed to elucidate the ionic conduction mechanisms in this material system and characterize its stress self-sensing and electrochemical charge retention capabilities. The results revealed that the marine aggregates are not ionic conductive materials; however, they facilitate improved electrochemical response through enhanced formation of highly ion-exchanging calcium-silicate-hydrate (C-S-H) phases, coupled with integrated porous channels that enable sustained ion mobility despite drying. This synergistic ion transport yielded a bulk ionic resistivity around 25 kΩ⊡cm at room temperature, which lies in typical ranges seen in solid-state electrolytes for battery systems. Controlled compressive loading indicates appreciable self-sensing capacity at low-stress levels, suggesting applicability to detect the onset of mechanical damage. Negligible charge leakage upon 28 days of curing further demonstrates the electrical energy storage potential of the sea-based cement. By harnessing locally available seawater and marine sand resources to develop ionic conductive cementitious composites, this work provides the framework to optimize durable multifunctionality for sensing and electrical energy storage in reinforced concrete infrastructure. This in return improves the sustainability and energy efficiency of the built environment.
KW - Cementitious Materials
KW - Energy Storge
KW - Sand marine
KW - Seawater
KW - Self-Sensing
KW - Aggregates
KW - Curing
KW - Density functional theory
KW - Electrochemical impedance spectroscopy
KW - Energy efficiency
KW - Energy storage
KW - Ions
KW - Sand
KW - Silicate minerals
KW - Solid electrolytes
KW - Storage (materials)
KW - Sustainable development
KW - Cementitious composites
KW - Cementitious materials
KW - Electrical energy storages
KW - Energy
KW - Energy storge
KW - Marine sands
KW - Self energy
KW - Self-sensing
KW - Storage capability
KW - Cyclic voltammetry
U2 - 10.1016/j.conbuildmat.2024.136218
DO - 10.1016/j.conbuildmat.2024.136218
M3 - Journal article
VL - 428
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 136218
ER -