Ngokuqhelekileyo, isivuno se-rubble eqhutywe ngamatye malunga ne-80-90%, oko kukuthi, i-toni enye ye-rubble ingaphula i-0.8-0.9 yeetoni zamatye, kuba iimpawu ze-rubble kwimimandla eyahlukeneyo ziyahluka, njenge: viscosity, umxholo we powder Ubungakanani, ukufuma, njl., ukuba umhlaba kunye nokungacoceki kubambene...
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