Empirical methods to predict the abrasion resistance of rock aggregates

摘要

The possibility of predicting the Los Angeles (L.A.) abrasion loss from the Schmidt hammer, point load and porosity tests was investigated using 9 igneous, 11 metamorphic and 15 sedimentary rocks with L.A. values ranging from 10 to 76%. Regression analysis indicated a strong correlation (r~2 = 0.72) between L.A. abrasion loss and point load and a good correlation (r~2 = 0.62) between L.A. abrasion loss and Schmidt hammer value. When the samples were divided according to porosity (n < 1% and n > 1%), stronger correlations were obtained, especially for the point load index. The predictions from the Schmidt hammer results were not as good but within acceptable limits.