Abstract
Lightweight steel concrete structures (LSCS) - an innovative energy-efficient building structure type that can be used both as load-bearing and as enclosing one. They consist of profiled steel - usually galvanized and cold-bent - filled with a monolithic foam concrete with a 400kg/m3 density and with fiber cement sheets sheathing. These structures can be used in industrial and civil buildings as internal and external bearing and enclosing wall structures and as slabs, energy-efficient roof covering. According to the LSCS production method, prefabricated panels (walls and slabs) and building site performed constructions are distinguished. The paper presents the testing results with the aim to determine the fire resistance limit of a slab panel fragment by bearing capacity (R), loss of integrity (E), loss of heat insulating capability (I) and fire hazard class. Two samples of a slab panel fragment were selected for the fire resistance high-temperature tests. The actual fire resistance limit of samples of the slab panel fragment is at least REI 60 with a uniformly distributed load 4 kN/m2.
Highlights
Lightweight steel-concrete slab panels are the type of lightweight steel concrete structures (LSCS, [1,2])
They are well-known as energy-efficient composite steel and concrete structures in which as filling concrete monolithic foam concrete of the D400...D1000 grade acts; as a rule, LGSS act as profile steel, and permanent formwork functions performing fiber cement panels
Foam concrete is produced both in a factory and on a construction site, usually has a density of 400...600 kg/m3 for slabs and is used in the innovative building structures type lightweight steel concrete structures (LSCS)
Summary
Lightweight steel-concrete slab panels are the type of lightweight steel concrete structures (LSCS, [1,2]). They are well-known as energy-efficient composite steel and concrete structures in which as filling concrete monolithic (pouring) foam concrete of the D400...D1000 grade acts; as a rule, LGSS (light gauge steel structures, [3],[4] and etc.) act as profile steel, and permanent formwork functions performing fiber cement panels. The design forces from all loadings are perceived by foam concrete and profile steel. Foam concrete is produced both in a factory and on a construction site, usually has a density of 400...600 kg/m3 for slabs and is used in the innovative building structures type lightweight steel concrete structures (LSCS). Microsilica, granite, perlite and vermiculite are used in foam concrete production [5]
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