Bulk cement plants furnish the materials used in making concrete such as sand, crushed stone, and cement. It is all stored in silos and fed by gravity into mixing hoppers on ready-mix cement trucks. This is a good destination for your hopper cars. LVM 8-M – MACK CONCRETE MIXER TRUCK is a good companion piece to this building. Footprint is 8 ½” x 11 ¼”. Height is 13 ¾”..