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Mechanical properties and degradation mechanism of LNG containment concrete material under cryogenic conditions
Highlights Compressive strength and tensile strength of the concretes at cryogenic temperature were studied. The damage degree of the concretes after cryogenic freezing-thawing cycles was investigated. The mechanism of mechanical properties of the concretes at cryogenic temperatures was analyzed. The degradation mechanism of damaged concrete under freezing-thawing cycles was discussed. Application of the HCC for on all-concrete LNG storage tanks is appropriate.
Abstract The mechanical properties and deterioration of concrete under cryogenic conditions are unclear. Here, high-strength and cryogenic temperature-resistant concrete (HCC) was developed for Liquefied natural gas (LNG) inner tank applications. Influences including compressive and tensile concrete strength under different temperatures (25 °C ∼ -165 °C) and freezing-thawing cycles were investigated. The results showed that lower temperatures result in higher compressive strengths, the tensile strength increases and then decreases, and the greatest increase in strength occurs at −45 °C. The tensile strength of HCC and C60 concrete decreases below −105 °C and −45 °C, respectively; more freezing-thawing cycles result in greater mechanical property degradation. Furthermore, compared to C60 concrete, HCC has a significantly lower rate of strength loss. The mechanical property mechanisms at different cryogenic temperatures and deterioration due to the freezing-thawing cycles were investigated by differential scanning calorimetry (DSC), nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM). HCC is an ideal material for LNG inner tanks.
Mechanical properties and degradation mechanism of LNG containment concrete material under cryogenic conditions
Highlights Compressive strength and tensile strength of the concretes at cryogenic temperature were studied. The damage degree of the concretes after cryogenic freezing-thawing cycles was investigated. The mechanism of mechanical properties of the concretes at cryogenic temperatures was analyzed. The degradation mechanism of damaged concrete under freezing-thawing cycles was discussed. Application of the HCC for on all-concrete LNG storage tanks is appropriate.
Abstract The mechanical properties and deterioration of concrete under cryogenic conditions are unclear. Here, high-strength and cryogenic temperature-resistant concrete (HCC) was developed for Liquefied natural gas (LNG) inner tank applications. Influences including compressive and tensile concrete strength under different temperatures (25 °C ∼ -165 °C) and freezing-thawing cycles were investigated. The results showed that lower temperatures result in higher compressive strengths, the tensile strength increases and then decreases, and the greatest increase in strength occurs at −45 °C. The tensile strength of HCC and C60 concrete decreases below −105 °C and −45 °C, respectively; more freezing-thawing cycles result in greater mechanical property degradation. Furthermore, compared to C60 concrete, HCC has a significantly lower rate of strength loss. The mechanical property mechanisms at different cryogenic temperatures and deterioration due to the freezing-thawing cycles were investigated by differential scanning calorimetry (DSC), nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM). HCC is an ideal material for LNG inner tanks.
Mechanical properties and degradation mechanism of LNG containment concrete material under cryogenic conditions
Cheng, Linian (author) / Liu, Juanhong (author) / Duan, Pinjia (author) / Zhou, Yucheng (author) / Zhou, Dawei (author) / Wang, Jiahao (author)
2022-07-20
Article (Journal)
Electronic Resource
English
Use of concrete for containment of cryogenic liquids
| British Library Conference Proceedings | 2005
A review of concrete properties at cryogenic temperatures: Towards direct LNG containment
| British Library Online Contents | 2013
A review of concrete properties at cryogenic temperatures: Towards direct LNG containment
| Online Contents | 2013