Screed plate and tamper bar arrangement for paving apparatus or paving applications

A screed system and a tamper bar system for a road paver, the screed system comprising:

• a screed subsystem comprising a screed plate, wherein a screed surface of the screed plate is constructed to contact a paving material in a horizontally extending direction of the screed surface has a first pattern of protrusions extending therefrom;
• and
• a tamper bar subsystem comprising a tamper plate and a tamper bar drive subsystem, the tamper bar subsystem being positioned forward of the screed plate in a direction of travel of the road paver, wherein at least a portion of a tamper surface of the tamper plate is constructed to contact the paving material in a horizontally extending portion of the tamper surface and has a second pattern of protrusions extending therefrom;
• wherein the tamper bar subsystem is selectively movable from a first position to a second position, and wherein movement between the first position and the second position is at least partially in a direction perpendicular to the horizontally extending portion of the tamper surface.

A screed system for a road paver, the screed system comprising:

• a screed plate having a first paving surface constructed for contacting a paving material;
• a tamper bar subsystem positioned forward of the screed plate in a paving direction of the screed system, the tamper bar subsystem including a tamper plate and a tamper bar, the tamper plate having a second paving surface constructed for contacting the paving material;
• a tamper bar drive subsystem coupled to the tamper bar and constructed to selectively move the tamper bar between a first position and a second position in a direction non-parallel to the paving direction of the screed system;
• and
• a control system configured to receive information indicative of a material property of the paving material and determine at least one of a stroke length and an amount of vibration of the tamper bar based on the material property of the paving material.