Machine for preparing an asphalt sample by polishing the surface of the sample and associated method

摘要

A machine (10) for preparing a sample asphalt material (74) for testing includes a rotatable shaft (22) carrying a disc (28) adapted to engage the sample (74). A channel (26) which communicates with a source of water is formed in the shaft (22). A plate assembly (16) having a predetermined weight carries the shaft (22). An actuator assembly (18) moves the plate assembly (16) upwardly and releases the plate assembly (16) so that it is allowed to move downwardly so that the disc (28) contacts the sample (74) with only the weight of the plate assembly (16) being applied to the sample (74). The disc (28) is made of a rubber material and receives the water from the channel (26) through aperture (72) which communicates with slots (44) on the side of the disc (28) facing the sample (74). As a result, water is produced to the interface between the disc (28) and the sample (74) as the disc (28) rotates to polish the sample (74) and prepare it for testing.

主权项

1. An apparatus for preparing a sample asphalt material for testing comprising a rotatable shaft, a disc carried by said rotatable shaft and adapted to engage the sample asphalt material, a sample holding bracket, a plate assembly including a plate, a motor carried by said plate, said motor rotating said rotatable shaft, further comprising an actuator assembly for moving said plate assembly, said actuator assembly including two braces, each brace having a guide channel therein, each guide channel having an upper end, a bolt capable of moving through said guide channels, wherein when upward travel of said plate assembly is desired, said actuator assembly causes said bolt to engage said upper ends of said guide channels, and wherein when downward travel of said plate assembly is desired, said gravitational force of said plate assembly is utilized until said disc engages said sample asphalt material.