Polypropylene Fiber is an Effective Way to Struggle with the Explosion-Like Destruction of Concrete in Case of Fire

The article presents the results of research work, which studied one of the effective methods to combat the explosion-like destruction of concrete in case of fire, namely the introduction of an additive of polypropylene microfiber. The studies were carried out by fire tests of full-scale slab structures of continuous cross-section made of ordinary heavy concrete with the addition of polypropylene microfiber in an amount of 1 kg/m³, with a concrete moisture content of more than 4% before the test. According to the results of fire tests, almost complete absence of explosion-like destruction of concrete slabs in case of fire was established. Also, the studies of changes in the strength properties of concrete with the addition of polypropylene microfiber under the short-term exposure to elevated and high temperatures up to 600оC were conducted. The results of the work are of great practical importance to ensure the required limits of fire resistance when designing reinforced concrete structures operating under wet conditions (tunnels, collectors, underground structures), as well as for all monolithic reinforced concrete structures at the stage of their construction.

I.S. KUZNETSOVA, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
V.G. RYABCHENKOVA, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)
M.P. KORNYUSHINA, Master of Engineering and Technology (This email address is being protected from spambots. You need JavaScript enabled to view it.)
I.P. SAVRASOV, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
M.S. VOSTROV, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Research Institute of Concrete and Reinforced Concrete named after A.A. Gvozdev (NIIZHB), JSC “Research Center of Construction” (6, 2nd Institutskaya Street, Moscow, 109428, Russian Federation)

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