Fraction.........................3 - 8, Fraction.........................5 - 15
Fraction.........................8 - 12, Fraction.........................15 - 25
Fraction.........................40 -70
Bazalt
Physical & mechanical properties
volumetric weight...........2810 - 2980 kg/m3
water-absorbtion............0,06 - 1,8%
compression strength.....150 - 250 MPa
flexure strength..............160 - 270 MPa
attritive ability of rock.....0,44 - 0,5 g/cm2
Minerals
pyroxene...........................35 - 38%
plagioclase.......................30 - 45%
gupersten.........................15 - 39%
qthers....................................3%
