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Falling Weight Deflectometer
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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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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

Sample TypeRoundEnrollment CutoffShip Date*Non-Receipt*Closing DateFinal Report
Aggregate Degradation1/212/9/20211/20/20222/3/20223/17/20224/7/2022
Soil Classification and Compaction185/1861/27/20223/10/20223/24/20225/5/20225/19/2022
Soil Resistance R-Value185/1862/3/20223/17/20223/31/20225/12/20225/26/2022
Soil California Bearing Ratio (CBR)185/1862/3/20223/17/20223/31/20225/12/20225/26/2022
Performance Graded Asphalt Binder267/2682/10/20223/24/20224/7/20225/19/20226/2/2022
Viscosity Graded Asphalt Cement267/2682/17/20223/31/20224/14/20225/26/20226/9/2022
Asphalt Mixture Hveem Design77/783/31/20225/12/20225/26/20227/7/20227/21/2022
Asphalt Mixture Marshall Design77/783/31/20225/12/20225/26/20227/7/20227/21/2022
Asphalt Mixture Gyratory53/544/7/20225/19/20226/2/20227/14/20227/28/2022
Aggregate Gradation and Gravity1/25/26/20227/7/20227/21/20229/1/20229/15/2022
Emulsified Asphalt77/786/16/20227/28/20228/11/20229/22/202210/6/2022
Slurry and Micro Systems11/127/21/20229/1/20229/15/202210/27/202211/10/2022
Performance Graded Asphalt Binder269/2707/21/20229/1/20229/15/202210/27/202211/10/2022
Paint69/708/4/20229/15/20229/29/202211/10/202211/24/2022
Viscosity Graded Asphalt Cement269/2708/4/20229/15/20229/29/202211/10/202211/24/2022
Asphalt Mixture Solvent Extraction97/989/1/202210/13/202210/27/202212/8/202212/22/2022
Asphalt Mixture Ignition Oven45/469/29/202211/10/202211/24/20221/5/20231/19/2023
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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