Iranian Journal of Science and Technology Transactions of Civil Engineering, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 23, 2024
Language: Английский
Iranian Journal of Science and Technology Transactions of Civil Engineering, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 23, 2024
Language: Английский
Construction and Building Materials, Journal Year: 2024, Volume and Issue: 435, P. 136728 - 136728
Published: May 28, 2024
Heavy-weight concrete (HWC) is currently the most widely used radiation shielding material in nuclear industry. However, pre- and post-fire mechanical behavior of HWC containing Iron sand (IS) and/or fly ash (FA) not thoroughly studied. This paper fills research gap by testing 12 mixes, which replaced river (RS) with 50% or 100% IS ordinary Portland cement (OPC) 15%, 25% 35% FA volume. The temperature-time curve, mass loss, surface change, onset spalling, failure modes, residual compressive strength, elastic modulus stress-strain curve after having exposed to 400, 600, 800 1000°C were investigated. Additionally, chemical compositions analyzed X-ray diffraction. Results demonstrated that flowability increased / replacement ratio due more spherical shape improved packing structure. Replacing RS 15% OPC could effectively enhance thermal insulation capacity, strength (increased 9.5% at 25°C 400°C, 12.9% 600°C, 46.0% 800°C 63.6% compared normal concrete) 26.3% 25°C, 17.5% 20.5% 120% HWC. Lastly, all obtained results suggested characteristic explicable/predictable theory wet density.
Language: Английский
Citations
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Language: Английский
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0