摘要：Th.s paper presents experimental investigation for particles breakage for natural sand. Th. particle breakage was induced by subjecting th. sample to one dimensional compression. Grain size analyses were performed before and after induced breakage. Th.reafter, th. sand sh.ar strength.parameters were assessed using direct sh.ar box tests and th. coefficient of permeability was assessed using constant h.ad permeameter. Examining th. obtained results revealed th.t th. amount of breakage due to one dimensional compression was of order h.gh.r th.n th. amount occurring during direct sh.ar test. Peak sh.ar strength.parameters decreased with.th. particles breakage increasing. Moreover, dilation angle of sh.ar strength.pronouncedly decreases with.th. amount of particles breakage increasing. Crush.ng h.s obvious effect on th. evaluated coefficient of permeability.