Naslov
Properties of concrete pavements prepared with ferrochromium slag as concrete aggregate

Autori
Zelić, Jelica

Izvornik
Cement and Concrete Research (0008-8846) 35 (2005), 12; 2340-2349

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

Ključne riječi
Ferrochromium slag; characterization; mechanical properties; aggregate; concrete.

Sažetak
The paper presents the results of investigation related to both the properties of the ferrochromium slag and the standard physical and mechanical properties of Portland cement concrete pavements (PCCP) made with this slag as aggregate, according to the relevant Croatian standards. Slag is formed as a liquid at 1700 deg C in the manufacture of the high-carbon ferrochromium metal and, by slow cooling in the air, the slag crystallized to give a stable CaO-MgO-Al2O3-silicate product with mechanical properties similar the basalt. With a proper selection of slag as an artificial aggregate, concrete pavements with compressive strengths, wear resistance and specific weight higher then in those from natural (limestone) aggregate in commercial Portland cement, type CEM II/B-S 42, 5 (EN 197), can be made. The 28-day compressive strength of the concrete made with original unfractioned slag and with standard limestone as aggregates (w/c = 0.64 and 350 kg/m3) reached the values of 57.00 MPa and 36.70 MPa, respectively. Volume stability, high volume mass, good abrasion resistance to wear and crushability make this reinforced slag concrete suitable for wearing courses of concrete pavements for traffic load class 1 and 2 where carbonate stone material (limestone) mainly does not meet the Standard Technical Requirements for cement concrete slab pavements according to the relevant Croatian Standard.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA