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The gold standard for laboratory accreditation in the construction industry

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Samples that drive quality

"I don’t think we would have the quality of the AB program that we do [without] having their involvement, maintaining the standard that we do. I think it’s helped us immensely."


New Hampshire Department of Transportation

Alan Rawson, Bureau of Materials & Research Administrator

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50 years of experience
3,000+
PSP participants
22,000+
samples shipped per year
1,000
laboratory assessments per year
1,900+
accredited labs






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Reminder: Please be sure to always include your PSP Enrollment number on your datasheet.

This enables us to properly identify your laboratory. We will be happy to assist you if you do not know your PSP Enrollment number. Please contact us at (240) 436-4900 or psp@aashtoresource.org.

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Instructions and Datasheets are not made available until a sample round's scheduled ship date. Visit the Proficiency Sample Schedule for more details.


There currently are not any open sample rounds. Please view the:
Sample Schedule
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