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Perpendicular Verification Device (PVD)

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PVD
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CAT#: PVD-2 -for 2" x 4" specimens

CAT#: PVD-3 -for 3" x 6" specimens

CAT#: PVD-4  -for 4” X 8” specimens

CAT#: PVD-4NS -for 4” X 8” specimens with standard retaining cup and no spacer

CAT#: PVD-6  -for 6” X 12” specimens

CAT#: PVD-TOOL-2  -gap measurement tool

CAT#: PVD-TOOL-3  -gap measurement tool

CAT#: PVD-TOOL-4 -gap measurement tool

CAT#: PVD-TOOL-6 -gap measurement tool

 

The PVD (Perpendicular Verification Device) is designed to rest on the lower platen of your testing machine and provide a fast, easy and accurate verification of cylinder perpendicularity to demonstrate compliance with ASTM C39. Both sizes (PVD-6 for 6” X 12” specimens, PVD-4 for 4” X 8” specimens) are configured to reach the test specimen while avoiding contact with your ASTM compliant top and bottom retaining cups. The PVD-4NS is designed for standard retaining cups.The PVD-4 is designed for use with a 4 inch high X 7.5 inch round or square spacer. The device can be custom manufactured for use with spacers of other dimensions. Call for price quote. A Gap Measurement Tool (PVD-TOOL-4 & PVD-TOOL-6) is also provided. To be used as a “go”/ “no-go” check. The PVD-6, PVD-4NS and PVD-4 are sold separately. Patent #10,551,161 B2 Made in the USA.
The PVD (Perpendicular Verification Device) is designed to rest on the lower platen of your testing machine and provide a fast, easy and accurate verification of cylinder perpendicularity to demonstrate compliance with ASTM C39.
 
Sizes are configured to reach the test specimen while avoiding contact with your ASTM compliant top and bottom retaining cups.
 
Please note that the PVD-4NS is designed for standard retaining cups and no spacer.  The PVD-4 is designed for use with a 4 inch high X 7.5 inch round or square spacer.
 
The device can be custom manufactured for use with spacers of other dimensions. Call for price quote.
 
A Gap Measurement Tool is also provided to be used as a “go”/ “no-go” check.
 
All are sold separately.
 
Patent #10, 551, 161 B2
 

""7.4.2 Verification of Alignment When Using Unbonded Caps—If using unbonded caps, verify the alignment of the specimen after application of load, but before reaching 10 % of the anticipated specimen strength. Check to see that the axis of the cylinder does not depart from vertical by more than 0.5° (Note 13) and that the ends of the cylinder are centered within the retaining rings. If the cylinder alignment does not meet these requirements, release the load, and carefully recenter the specimen. Reapply load and recheck specimen centering and alignment. A pause in load application to check cylinder alignment is permissible. NOTE 13—An angle of 0.5° is equal to a slope of approximately 1 in 100 mm [1⁄8 inches in 12 inches]." Reprinted, with permission, from C39/C39M – 21 Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. A copy of the complete standard may be obtained from ASTM International, www.astm.org."

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