Reminder - MDOT Quality Control (QC) Lab Requirements for 2023

Beginning in 2023 all producers listed on the MDOT prequalified aggregate supplier list must adhere to the updated requirements of Section 4.03.03 of the MDOT Materials Quality Assurance Procedures Manual (MQAP)

These new requirements include:

• Must follow MDOT Procedures for Aggregate Inspection
• Must meet QMS requirements of AASHTO R18 (contact MAA office for template)
• Must be evaluated by an internal or external source annually to ensure compliance with the requirements to ensure complete with requirements of AASHTO R 18.MDOT form 2923 may be used for this evaluation
• Must participate in the aggregate gradation portion of the “Aggregate Gradation and Gravity” and other program that may pertain to your lab (e.g., LA Abrasion, fine aggregate angularity, etc.) beginning in 2023. (Details below)
• Must employ qualified QC technicians

Each lab performing QC testing meet these requirements.
 
Details about AASHTO re:source proficiency program

Click here to establish an AASHTO re:source online account.

Once established you will be able to request proficiency samples by requesting enrollment on line or you can click here for the “Proficiency Sample Program Request Form”
 
Click here for the “Proficiency Sample Schedule”

If you have any questions regarding the registration process or how to request samples please contact the AASSTO re:source help line at info@aashtoresource.org, or call 240-436-4900.
 
Please note that enrollment into the program must be submitted prior to the enrollment cutoff date (est. mid May 2023).  Samples will be shipped to producer laboratories beginning the first part of July 2023.  Results must be submitted to AASHTO no later than first part of Sept 2023. (note: actual due/enrollment dates will be published on the AASHTO re:source website http://www.aashtoresource.org/  under the “Schedule”)
 
The program is $180 for a regular XPS fee (per box).  A box for each lab location is required.
 
Testing Requirements
The inputs listed in Table 5 of the MDOT Material Quality Assurance Procedures Manual must be submitted to AASHTO re:source for each proficiency test.
 
Recent changes to Chapter 3 of the MDOT Procedures for Aggregate Inspection that correspond
to the MQAP manual.  A summary of changes is below:

• removed a line stating a requirement for an initial lab inspection
• removed a line requiring a biennial lab inspection
• removed the section LABORATORY INSPECTIONS for Prequalified Aggregate Suppliers and replaced it with QUALIFIED QC LABORATORIES (PREQUALIFIED AGGREGATE SUPPLIERS)
• removed controlling region contact information section and updated contact information for the Aggregate Quality Unit to be general.

Changes to MDOT Materials Quality Assurance Procedures Manual
 

• Removed requirement for the annual MDOT Independent Assurance Testing (IAT) Program

 
Please contact the MAA office at 517-381-1732 if you have any questions