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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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50 years of experience
3,000+
PSP participants
23,000+
samples shipped per year
1,000
laboratory assessments per year
1,900+
accredited labs







Proficiency Sample Data Documents Enroll in our program

Proficiency Sample Schedule

Sample TypeRoundEnrollment CutoffShip Date*Non-Receipt*Closing DateFinal Report
Fine Aggregate203/2041/2/20191/31/20192/14/20193/28/20194/11/2019
Soil Classification and Compaction179/1801/28/20192/21/20193/7/20195/2/20195/16/2019
Viscosity Graded Asphalt Cement255/2562/19/20192/28/20193/14/20194/25/20195/9/2019
Performance Graded Asphalt Binder255/2562/25/20193/7/20193/21/20195/2/20195/16/2019
Asphalt Mixture Hveem Design71/724/15/20195/30/20196/13/20197/25/20198/8/2019
Asphalt Mixture Marshall Design71/724/15/20195/30/20196/13/20198/1/20198/15/2019
Asphalt Mixture Gyratory47/486/3/20196/20/20197/5/20198/15/20198/29/2019
Emulsified Asphalt71/726/17/20196/27/20197/11/20198/22/20199/5/2019
Slurry and Micro Systems7/86/17/20196/27/20197/11/20198/22/20199/5/2019
Soil Resistance R-Value179/1806/27/20197/25/20198/8/20199/19/201910/3/2019
Soil California Bearing Ratio (CBR)179/1806/27/20197/25/20198/8/20199/19/201910/3/2019
Coarse Aggregate205/2067/22/20199/5/20199/19/201910/31/201911/14/2019
Viscosity Graded Asphalt Cement257/2588/29/20199/12/20199/26/201911/7/201911/21/2019
Performance Graded Asphalt Binder257/2588/29/20199/19/201910/3/201911/14/201911/28/2019
Paint63/649/5/20199/26/201910/10/201911/21/201912/5/2019
Asphalt Mixture Solvent Extraction91/929/30/201911/14/201911/21/20191/16/20201/30/2020
Asphalt Mixture Ignition Oven39/4011/4/201912/5/201912/19/20192/6/20202/20/2020
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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