The Perpendicularity Verification Device (PVD) is a new tool to confirm that concrete cylinders are properly aligned during compressive strength testing with Concrete Compression Machines. The latest revisions to ASTM C39/39M require verification that alignment is within ±0.5° of vertical for each specimen tested when Unbonded Caps are used.
After the specimen loading has commenced, but before reaching 10% of the total load, the PVD is held on the bottom machine platen and manually positioned against the cylinder. The included Gap Measurement Tool is used to check the gap between the device and the cylinder. If the Tool does not pass through the gap, the test can continue.
The PVDs feature unique designs for use with 4x8in (102x203mm) or 6x12in (152x305mm) cylinders and are simple, lightweight, and easy to use. A recess cut at the bottom eliminates interference from Retaining Rings and spacers during use. Sturdy machined aluminum construction.
MCA-44 is used for 4x8in (102x203mm) specimens in compression machines, where 4in (102mm) high spacer blocks are used for the proper positioning of the cylinder.MCA-44N is designed for use with 4x8in cylinders in compression machines where no spacer block is in use.
MCA-46 fits 6x12 concrete cylinders in all machines.
Features:
- Sturdy, precision-machined aluminum
- Notched bases prevent contact with Retaining Rings and Spacers
- Meets new ASTM C39 requirements
Included Items:
- Perpendicularity Verification Device (PVD) for 4in or 6in concrete cylinders
- PVD Gap Measurement Tool
Accessories:
- PVD Gap Measurement Tool available as a replacement measuring tool
