150-mm GB1 Mold Top & Base Plate

Part #ACGCM150T1

150-mm Top and Base Plates come with a 150-mm GB1 Mold Assembly and are available as replacement parts.

Available Factory Direct

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Pine’s 150-mm GB1 Mold Top and Base Plate are used with a Pine 150-mm GB1 Mold and a Pine GB1 Brovold Superpave Gyratory Compactor to make 150-mm asphalt specimens.  Pine makes these end plates available as part of a 150-mm GB1 Mold Assembly or by themselves.  Each plate includes a certificate.


Proper Mold Top & Base Plate Orientation:

The mold top plate and the mold base plate for the AFGB1 Brovold mold assembly are the same.  A mold plate is correctly placed in a mold when the dull spot in the center of the plate, a pocket, faces away from the asphalt material.   The beveled edge on the circumference of the plate also faces away from the asphalt material when a plate is properly positioned.


The Purpose of the Pocket:

  • A pocket allows space for excess grease and debris to collect.
  • A pocket offsets the impact of a crowned ram foot or gyratory head surface.


The Purpose of the Beveled Edge:

The beveled edge prevents binding between the mold plate and the mold wall when the angle of gyration is induced during compaction.


The Impact of an Improperly Oriented Mold Plate:

  • Installing the mold plate incorrectly with the pocket towards the material may cause the plate to bind against the mold and reduce the amount of pressure applied to the asphalt material.   This may affect specimen density.
  • Installing the mold top plate incorrectly with the smooth face towards the ram foot may impact the angle of gyration if excess lubricant or debris are present.  This may affect specimen density.


No Pocket in Your Mold Plates?

Pockets can be machined into existing mold plates that do not have pockets.  Call +1.724.458.6393.