Fire Resistance of Steel Slag Aggregates Concrete (CROSBI ID 165386)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Netinger, Ivanka ; Bjegović, Dubravka ; Mladenovič, Ana
engleski
Fire Resistance of Steel Slag Aggregates Concrete
In this paper steel slag is considered as an aggregate which could improve fire resistance of concrete due to the fact that it is a material that occurs at high temperatures. For this purpose, three concrete mixtures were prepared ; concrete mixture with dolomite (reference mixture) and one concrete mixture with each of slags available in Croatia. The specimens of measurements 100/100/400 mm were demoulded 24 h after the casting, placed in a water tank for 7 days and after that placed in the chamber (temperature of about 2932 K (202 C) and humidity level of 955%) and finally kept there until the age of 28 days. After 28 days, the prisms were left in the laboratory room until the age of 56 days. At the age of 56 days the specimens, with moisture content within the limits 3 – 4 %, had been exposed to high temperatures impact. The specimens were put into the test furnace, heated to target temperatures of 373, 473, 673, 873 and 1073 K (100, 200, 400, 600 and 800 C) with the heating rate of 1 K/min and then kept at constant temperature for 1h. Upon cooling of the specimens, their residual mechanical properties (flexural strength, compressive strength and static modulus of elasticity), residual mass and residual pulse velocity were tested and compared with the same properties of reference concrete. Achieved results and microstructural analysis promote the theory that here observed slags could be used as fire resistant aggregates.
waste management; steel slag; aggregate; concrete; fire resistance; residual properties; microstructure
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Podaci o izdanju
29 (1/2)
2010.
77-87
objavljeno
0334-6455
10.1515/HTMP.2010.29.1-2.77
Povezanost rada
Građevinarstvo, Metalurgija