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Browsing by Subject "HPC concrete"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Koncepcja nowej obudowy szybów górniczych głębionych w sztucznie zamrożonym górotworze
    (2007) Czaja, Piotr; Hydzik-Wiśniewska, Joanna
    Application of new material presenting higher strength and lower heat conductivity are widely used in nowadays civil engineering. It brings specific economical and ecological profits. Application of the materials so called 'new generations' in constructions of underground structures especially in tunnel and shaft lining can provide several advantages. This paper presents new concept of shaft lining sunk by the method of rock mass freezing. Replacement of the ordinary gravel concrete by means of High Performance Concrete (HPC) and Light Weight Aggregate Concrete (LWAC) we can reduce heat stream flowing across the lining. It means that temperature inside the shaft bottom can be increased up to +5 degrees of Celsius without any risk of melting frozen rock mass. This let us in application into the permanent layer of the shaft lining the high performance concrete. This idea can be also introduced in the deep mines for lowering the quantity of heat flowing from rock mass to the ventilation air, resulting decrease of mine air conditioning power.