Category Archives: Uncategorized

Clean Molds & Endplates

“My boss is always on my case to keep my molds clean.  They’re a pain!  Does it really matter?” Yes, it does matter.  If your molds look like the ones below, you have some work to do. Required for Certification The checking of mold assemblies is part of the proper annual verification/calibration of a gyratory…

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Mold End Plate Pockets

Pockets in my mold end plates?  Why would I need that?  And, what are they, anyways? Why are pockets important? The ram heads [ram foot on a Pine gyro] shall stay perpendicular to their axis (AASHTO T312 Section 4.3).  The surface of the ram foot shall be perpendicular to the direction in which the ram…

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Equipment Calibration and COVID-19

With “shelter-in-home” orders and temporary business closures to aid in COVID-19 mitigation, companies are finding themselves in uncharted territory pertaining to state and federal regulations.  Your friends at Pine Test Equipment are no exception.  The Governor of Pennsylvania announced that all but “life-sustaining” businesses in Pennsylvania must shut down until further notice.  In compliance to…

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Ryan Gerner – New Service Coordinator

Pine welcomes Ryan Gerner as Service Coordinator for Pine Certified Service – the field service division of Pine Test Equipment.  Joining the Pine Team May 6, 2019, his role will be to continue to foster current customer partnerships as well as to identify and build new partnerships. Ryan will coordinate Pine Test Equipment service activities…

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LUBE it RIGHT

Gyratory compaction involves metal-to-metal interactions.  These interfaces need proper lubrication to function as intended and produce consistent specimens over an extended period of time. An incorrect amount lubrication can negatively impact the performance of your machine, which could affect specimen density. Too little grease causes energy to be consumed at the metal-to-metal interface instead of…

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End Plate Orientation

Proper end plate orientation really does matter. The base plates for the Pine 125X, G1 and G2 Superpave gyratory compactor molds have lips that rest on a ledge at the bottom of the mold.  An upside down plate will lead to density differences if you are compacting to height. Top plates for the Pine 125X…

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Angle Matters

I know that AASHTO T312 requires a gyratory compactor to operate at an internal angle of gyration of 1.16° ±0.02°.  But, what impact does variation in this angle really have? A low angle of gyration leads to less compaction and higher air voids.  A 0.1° drop in the angle of gyration lowers the bulk specific…

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Mind the Gap in Mold Assemblies

“Surely the size of the gap between and end plate and the mold wall can’t matter when it comes to producing consistent specimens” one might think.  But you might want to reconsider. Monitor your mold and end plate wear and strive to keep all your mold assemblies consistent in size to produce consistent specimens. AASHTO…

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Technical Bulletin 071918S: The Calibration Checking Set

Technical Bulletin 071918S:  The Calibration Checking Set Purpose:  The intent of this bulletin is to clarify the designated purpose of Pine’s AFCS25 Calibration Checking Set. The Calibration Checking Set: The Calibration Checking Set spring was designed as a tool for verifying the operation of a Pine Test Press in the 2,500 lb. range.  This tool is…

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