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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 Degradation - AGD3/412/8/20221/19/20232/2/20233/29/20233/30/2023
Soil Classification and Compaction - SOL187/1881/26/20233/9/20233/23/20235/4/20235/18/2023
Soil Resistance R-Value - RVL187/1882/2/20233/16/20233/30/20235/11/20235/25/2023
Soil California Bearing Ratio - CBR187/1882/2/20233/16/20233/30/20235/11/20235/25/2023
Viscosity Graded Asphalt Cement - BAC271/2722/16/20233/30/20234/13/20235/25/20236/8/2023
Performance Graded Asphalt Binder - PGB271/2722/23/20234/6/20234/20/20236/1/20236/15/2023
Asphalt Mixture Marshall Design - MAR79/804/13/20235/25/20236/8/20237/20/20238/3/2023
Asphalt Mixture Hveem Design by California Kneading Compaction - HCA1/24/13/20235/25/20236/8/20237/20/20238/3/2023
Asphalt Mixture Hveem Design by 4-in Gyratory Compaction - HCO1/24/13/20235/25/20236/8/20237/20/20238/3/2023
Asphalt Mixture Hveem Design by Gyratory Shear Compaction - HTX1/24/13/20235/25/20236/8/20237/20/20238/3/2023
Asphalt Mixture Gyratory - HMG55/564/20/20236/1/20236/15/20237/27/20238/10/2023
Polymer-Modified Emulsified Asphalt - PME1/25/4/20236/15/20236/29/20238/10/20238/24/2023
Aggregate Gradation and Gravity - AGG3/46/8/20237/20/20238/3/20239/14/20239/28/2023
Unmodified Emulsified Asphalt - EML79/807/13/20238/24/20239/7/202310/19/202311/2/2023
Paint - PNT71/727/20/20238/31/20239/14/202310/26/202311/9/2023
Performance Graded Asphalt Binder - PGB273/2747/27/20239/7/20239/21/202311/2/202311/16/2023
Slurry and Micro Systems - SMS13/147/21/20239/14/20239/28/202311/9/202311/27/2023
Viscosity Graded Asphalt Cement - BAC273/2748/10/20239/21/202310/5/202311/16/202311/30/2023
Asphalt Mixture Solvent Extraction - HMS99/1009/7/202310/19/202311/2/202312/14/202312/28/2023
Asphalt Mixture Ignition Oven - HMI47/489/28/202311/9/202311/23/20231/4/20241/18/2024
Aggregate Degradation - AGD5/612/7/20231/18/20242/11/20243/14/20243/28/2024
Soil Classification and Compaction - SOL189/1901/25/20243/7/20243/21/20245/2/20245/16/2024
Soil Resistance R-Value - RVL189/1902/1/20243/14/20243/28/20245/9/20245/23/2024
Soil California Bearing Ratio - CBR189/1902/1/20243/14/20243/28/20245/9/20245/23/2024
Viscosity Graded Asphalt Cement - BAC275/2762/15/20243/28/20244/11/20245/23/20246/6/2024
Performance Graded Asphalt Binder - PGB275/2762/22/20244/4/20244/18/20245/30/20246/13/2024
Asphalt Mixture Marshall Design - MAR81/824/18/20245/30/20246/13/20247/25/20248/8/2024
Asphalt Mixture Hveem Design by 4-in Gyratory Compaction - HCO3/44/18/20245/30/20246/13/20247/25/20248/8/2024
Asphalt Mixture Hveem Design by California Kneading Compaction - HCA3/44/18/20245/30/20246/13/20247/25/20248/8/2024
Asphalt Mixture Hveem Design by Gyratory Shear Compaction - HTX3/44/18/20245/30/20246/13/20247/25/20248/8/2024
Asphalt Mixture Gyratory - HMG57/585/2/20246/13/20246/27/20248/8/20248/22/2024
Polymer-Modified Emulsified Asphalt - PME3/45/9/20246/20/20247/4/20248/15/20248/29/2024
Aggregate Gradation and Gravity - AGG5/66/13/20247/25/20248/8/20249/19/202410/3/2024
Unmodified Emulsified Asphalt - EML81/827/11/20248/22/20249/5/202410/17/202410/31/2024
Viscosity Graded Asphalt Cement - BAC277/2787/18/20248/29/20249/12/202410/24/202411/7/2024
Slurry and Micro Systems - SMS15/167/21/20249/5/20249/19/202410/31/202411/14/2024
Performance Graded Asphalt Binder - PGB277/2788/1/20249/12/20249/26/202411/7/202411/21/2024
Paint - PNT73/748/4/20249/19/202410/3/202411/14/202411/28/2024
Asphalt Mixture Solvent Extraction - HMS101/1028/29/202410/10/202410/24/202412/5/202412/19/2024
Asphalt Mixture Ignition Oven - HMI49/509/29/202411/7/202411/21/20241/2/20251/16/2025
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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