Naslov
Influence of petrographical characteristics of silicate rocks on the quality of aggregates

Autori
Fistrić, Mladen ; Tomašić, Ivan ; Vrkljan Maja

Izvornik
Rudarsko-geološko-naftni Zbornik (0353-4529) 14 (2002); 11-20

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

Ključne riječi
Rock aggregates; Crushing resistance; LA abrasion test

Sažetak
The aggregate resistance to crushing was tested by means of the Los Angeles abrasion test. During this testing, an aggregate is subjected to dynamic load by impact and abrasion. The petrographic characteristics were examined with the petrographic and scanning electron microscope and by X-ray powder diffraction. In order to obtain the most correct evaluation of aggregates crushing resistance, four different values had been used: the recrushing index (Ir), the reduction ratio (RR), the Los Angeles abrasion value (LA) and the Los Angeles abrasion value residue (LAr.On the basis of the obtained results, the following petrographic factors have been revealed as the most important ones for rock aggregates resistance to crushing: a- the size of crystals, b&#8211 ; the form, arrangement and dimensions ratio of crystals, and, especially, c&#8211 ; the presence of microfractures in parent rock.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA