Naslov
Reduction of Postfire Properties of High-Strength Concrete

Autori
Torić, Neno ; Boko, Ivica ; Peroš, Bernardin

Izvornik
Advances in materials science and engineering (1687-8434) 2013 (2013); 712953, 9

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
high strength concrete ; compressive strength ; dynamic modulus ; secant modulus ; fire ; residual properties of concrete ; hot properties of concrete

Sažetak
This paper presents an experimental study of behaviour of high-strength concrete at high temperature. Reduction of themechanical properties of concrete was determined starting from the period when the concrete specimens were heated to the maximum temperature and cooled down to ambient temperature and the additional 96 hours after the initial cooling of the specimens. The study includes determination of compressive strength, dynamic and secantmodulus of elasticity, and stress- strain curves of concrete specimenswhen exposed to temperature level up to 600∘C.Thestudy resultswere compared with those obtained fromother studies, EN 1994-1-2 and EN1992-1-2. Tests point to the fact that compressive strength of concrete continues to reduce rapidly 96 hours after cooling of the specimens to ambient temperature ; therefore indicating that the mechanical properties of concrete have substantial reduction after being exposed to high temperature. The study of the dynamic and secant modulus of elasticity shows that both of the properties are reduced but remain constant during the period of 96 hours after cooling. The level of postfire reduction of compressive strength of the analyzed concrete is substantial and could significantly affect the postfire load bearing capacity of a structure.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

POVEZANOST RADA