Page 20 - DETERMINATION OF HARD MASSS AND ROCK MASS
P. 20
CLASSIFICATION OF HARD MASS & ROCK
MASS
Minimum ten (10) rock samples from the excavated
02 material resulted from the direct method by trial
excavation (Sample to be tested shall have size not
CONFIRMATION OF
HARD MASS AND less than 30mm and not more than 85mm with the
ROCK MASS BY preferred dimension about 50mm according to ASTM
MACHINERY (DIRECT D5731.
METHOD)
& Indirect Method by Point Load Test Point load test
(INDIRECT METHOD : shall be carried out on excavated material for this
POINT LOAD TEST).
purpose by using portable point load tester
apparatus.
