Thermal behavior of carbonated γ-C2S compacts subjected to high temperature : Mechanical properties and phase evolution
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Article number | 138799 |
Journal / Publication | Construction and Building Materials |
Volume | 451 |
Online published | 22 Oct 2024 |
Publication status | Published - 15 Nov 2024 |
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Abstract
In this study, carbonated γ-C2S compacts were subjected to CO2 curing at partial pressures of 0.02 MPa (P-0.02) and 0.3 MPa (P-0.3) prior to exposure to high temperatures (300–800 ℃) for investigation. The carbonated γ-C2S compacts exhibited constant strength at both 300 °C and 400 °C, with the presence of stable polymorphic CaCO3. At 500 ℃, the strength of P-0.02 increased by 20 %, while a more notable growth of 50 % was observed in P-0.3 associated to the presence of more aragonite (33.4 %). Beyond 800°C, the mechanical properties of P-0.02 and P-0.3 decreased to 16.6 % and 20.3 % of their original strength, respectively. With the decomposition of CaCO3, amorphous lime and β-C2S were generated, the latter indicated a simultaneous reaction between lime and silica gel occurred at high temperatures. Understanding the performance of carbonated γ-C2S compacts after exposure to high temperatures is crucial for ensuring the fire safety of this material used in construction applications. © 2024 Elsevier Ltd.
Research Area(s)
- Aragonite, Calcite, Carbonated γ-C2S, Carbonation products, High-temperature performance
Citation Format(s)
Thermal behavior of carbonated γ-C2S compacts subjected to high temperature: Mechanical properties and phase evolution. / Yu, Zhe; Wang, Xiaoli; Xian, Xiangping et al.
In: Construction and Building Materials, Vol. 451, 138799, 15.11.2024.
In: Construction and Building Materials, Vol. 451, 138799, 15.11.2024.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review