Вогнезахист бетону геоцементними покриттями

This paper shows the possibility of increasing the fire resistance of the normalized tunnel concrete structures up to 120 min through the use of thin-film intumescent geocement base coatings in the conditions of temperature carbohydrate fire. It is established that the developed structure fire coating thickness of 6 mm prevents heating of the surface layer of concrete under the cover to limit state – 380 °C.