heavy excavator working at gravel quarry unloads old concrete stones for crushing and recycling to gravel or cement.

backhoe bucket build bulldozer cement concrete construction crawler crusher crushing demolition devastation development dig digger dirt earth earthwork engendering engineering environment environmental equipment excavating excavation excavator gravel ground heavy highway hydraulic hydraulics industrial industry job loader machine machinery mine moving old pit quarry recycle recycling ruble scoop shovel soil stone stones technique unloads vehicle work worker working workplace