BUILDING STRUCTURE Russian patent published in 2007 - IPC E04B1/94 

FIELD: building, particularly thin-walled building structures including three-dimensional fire-resistant ones.

SUBSTANCE: building structure comprises 20-50 mm structural layer made of ferrocement or reinforced concrete and 15-25 mm fire-protective layer made of vermiculite concrete having average density of 450-750 kg/m³. The vermiculite concrete comprises heat and power plant ash taken in amount of 20-30% of Portland cement weight and saponated wood tar in amount of 0.3-0.4% of Portland cement weight. Each layer is reinforced with woven gauze. Woven gauze of structural layer is spaced 4-5 mm from layer boundary. Woven gauze of fire-protective layer is spaced 2 mm from layer boundary.

EFFECT: increased fire-resistance rating due to improved heat transfer from non-heated surface, extended service life and enhanced reliability.

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