Railway wagon comprising: - a base structure having: o at least one support platform, o at least two carriages configured to support the support platform and allow movement of the base structure along rails; - at least one conveyor carried by the support platform, said conveyor comprising: o a support frame, o a multiplicity of rollers, constrained to the support frame, each movable by rotation about its own axis of rotation, said rollers being aligned along a predetermined trajectory transverse to the rotation axes of the multiplicity of rollers, the multiplicity of rollers comprising: • at least one first end return roller, • at least one second end return roller (11") spaced from the first end roller, • a predetermined number of intermediate rollers interposed between said first and second end return rollers (11', 11"), o at least one belt wound in a closed loop between the first and the second end return roller (11', 11"), said belt comprising an operative tract configured to receive a predetermined amount of material, for example inert material, and rest on one or more rollers of said multiplicity, o at least one motor active on at least one of said multiplicity of rollers to define a motorized roller, said motor being configured to rotate said motorized roller about its rotation axis, characterized by the fact that the conveyor comprises at least one interconnection system distinct from the belt, configured to connect the motorized roller with at least one further roller of said multiplicity to define a driven roller, said interconnection system being configured to transfer the motion from the motorized roller to the driven roller to rotate the latter about its own axis. - a base structure having: o at least one support platform, o at least two carriages configured to support the support platform and allow movement of the base structure along rails; o at least one support platform, o at least two carriages configured to support the support platform and allow movement of the base structure along rails; - at least one conveyor carried by the support platform, said conveyor comprising: o a support frame, o a multiplicity of rollers, constrained to the support frame, each movable by rotation about its own axis of rotation, said rollers being aligned along a predetermined trajectory transverse to the rotation axes of the multiplicity of rollers, the multiplicity of rollers comprising: • at least one first end return roller, • at least one second end return roller (11") spaced from the first end roller, • a predetermined number of intermediate rollers interposed between said first and second end return rollers (11', 11"), o at least one belt wound in a closed loop between the first and the second end return roller (11', 11"), said belt comprising an operative tract configured to receive a predetermined amount of material, for example inert material, and rest on one or more rollers of said multiplicity, o at least one motor active on at least one of said multiplicity of rollers to define a motorized roller, said motor being configured to rotate said motorized roller about its rotation axis, characterized by the fact that the conveyor comprises at least one interconnection system distinct from the belt, configured to connect the motorized roller with at least one further roller of said multiplicity to define a driven roller, said interconnection system being configured to transfer the motion from the motorized roller to the driven roller to rotate the latter about its own axis. o a support frame, o a multiplicity of rollers, constrained to the support frame, each movable by rotation about its own axis of rotation, said rollers being aligned along a predetermined trajectory transverse to the rotation axes of the multiplicity of rollers, the multiplicity of rollers comprising: • at least one first end return roller, • at least one second end return roller (11") spaced from the first end roller, • a predetermined number of intermediate rollers interposed between said first and second end return rollers (11', 11"), • at least one first end return roller, • at least one second end return roller (11") spaced from the first end roller, • a predetermined number of intermediate rollers interposed between said first and second end return rollers (11', 11"), o at least one belt wound in a closed loop between the first and the second end return roller (11', 11"), said belt comprising an operative tract configured to receive a predetermined amount of material, for example inert material, and rest on one or more rollers of said multiplicity, o at least one motor active on at least one of said multiplicity of rollers to define a motorized roller, said motor being configured to rotate said motorized roller about its rotation axis,