engleski

Estimation of Resistance of Stone Aggregates to Recrushing

The stone aggregates of dolomite, andesite and spilitized diabase were tested to estimate their response to abrasive-impact strain. Standardized and non-standardized estimation of recrushing action were utilized in the experiment. The focus of the study was to improve the estimation of resistance to the recrushing process. The assumption that there is a relationship between the degree of recrushing of the stone aggregates and the grain surface before recrushing was confirmed. The investigation was performed by the use of the standardized method according to the HRN Standard (Los Angeles). For the complete evaluation of the aggregate several other methods in accordance to HRN were also applied. The values obtained are found to be the result of several factors which include structural, textural and mineral properties, as well as genesis, tectonics (postgenetic strain producing the micro-cleavage and cataclasis) and recrystallization. The influence of the size, shape together with the interrelationship of crystals and micro-blocks on the physical and mechanical properties were determined by electronic microscopy.

Stone aggregates; Dolomite; Andesite; Spilitized diabase; resistance to abrasion and impact (Los Angeles); Estimation of rechrushing

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