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COVID-19
About Us
AASHTO Accreditation
Laboratory Assessments
Proficiency Samples
Falling Weight Deflectometer
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Specifiers

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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55+ years of experience
3,000+
PSP participants
23,000+
samples shipped per year
1,000
laboratory assessments per year
2,000+
accredited labs









Proficiency Sample Data Documents Enroll in our program

Proficiency Sample Schedule

Important Announcement Regarding
Changes to AASHTO re:source Services Due to COVID-19

 

Sample TypeRoundEnrollment CutoffShip Date*Non-Receipt*Closing DateFinal Report
Fine Aggregate211/21212/15/20201/28/20212/11/20213/25/20214/8/2021
Soil Classification and Compaction183/1841/15/20212/25/20213/11/20214/22/20215/6/2021
Soil Resistance R-Value183/1841/15/20213/11/20213/25/20215/6/20215/20/2021
Soil California Bearing Ratio (CBR)183/1841/15/20213/11/20213/25/20215/6/20215/27/2021
Viscosity Graded Asphalt Cement263/2642/15/20213/18/20214/1/20215/13/20215/27/2021
Performance Graded Asphalt Binder263/2642/15/20213/25/20214/8/20215/20/20216/3/2021
Asphalt Mixture Hveem Design75/763/15/20215/6/20215/20/20217/1/20217/15/2021
Asphalt Mixture Marshall Design75/763/15/20215/6/20215/20/20217/8/20217/22/2021
Asphalt Mixture Gyratory51/523/15/20215/6/20215/20/20217/15/20217/29/2021
Emulsified Asphalt75/764/15/20215/13/20215/27/20217/8/20217/22/2021
Slurry and Micro Systems9/106/4/20216/25/20217/9/20218/27/20219/10/2021
Coarse Aggregate213/2146/15/20217/22/20218/5/20219/16/20219/30/2021
Performance Graded Asphalt Binder265/2667/15/20218/26/20219/9/202110/21/202111/4/2021
Paint67/688/15/20219/2/20219/16/202110/28/202111/11/2021
Viscosity Graded Asphalt Cement265/2668/15/20219/16/20219/30/202111/11/202111/24/2021
Asphalt Mixture Solvent Extraction95/969/15/202110/14/202110/28/202112/9/202112/23/2021
Asphalt Mixture Ignition Oven43/4410/15/202111/4/202111/18/202112/30/20211/13/2022
Sample TypeRoundEnrollment CutoffShip Date*Non-Receipt*Closing DateFinal Report

NOTE: All dates are subject to change.

*Non-Receipt Date - the date by which your laboratory should receive a sample; please contact us if you have not received your sample by this date

*Closing Date - All testing data must be submitted and confirmed (by the laboratory) on or before this date. Data submitted after this date will not be included in the analysis and ratings will not be received.

*Enrollment Cutoff Date - If your laboratory is enrolled after this date, you will be placed on a Waiting List for that specific sample. If there are enough remaining samples, they will be shipped to your laboratory after the Non-Receipt Date and an invoice will follow by mail.
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