水泥和混凝土在超低温环境下的性能变化及其应用要求

Performance change and application requirement of cement and concrete at ultra-low temperature

超低温混凝土目前主要应用于液化天然气(LNG)储罐的外部保护层,当内罐出现泄漏时,水泥混凝土保护层可以缓存液化天然气,防止液化天然气泄漏到外界造成各类危害。通过研究总结国内外超低温环境下水泥和混凝土各种性能变化,分析超低温混凝土的使用条件,为其推广应用提供参考和借鉴。

Uhra-low temperature concrete is mainly used in the outer protective layer of liquefied natural gas （LNG） tank.When the inner tank leakages, cement concrete protective layer can cache liquefied natural gas （LNG）, which prevents all kinds of damage of liquefied natural gas leakage to the outside world.Provide a reference for its popularization and application by summarizing the performance change of cement and concrete at ultra-low temperature environment at home and abroad and analysing using conditions of ultra-low temperature concrete.