Independent Assurance, Accreditation, & Proficiency Sample Programs Jason Davis, PE Field Quality Assurance Administrator, LA DOTD Materials Lab Louisiana Transportation Conference 2016
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Independent Assurance, Accreditation, & Proficiency Sample Programs Jason Davis, PE Field Quality Assurance Administrator, LA DOTD Materials Lab Louisiana Transportation Conference 2016
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Quality Assurance Program Provide confidence of quality Acceptance Testing = Pay $$ Verification Testing Double-check Independent Assurance Verify equipment and personnel
Independent Assurance Activities that are an unbiased and independent evaluation of all the sampling and testing procedures used in the acceptance program. Required by Federal 23 CFR 637 Includes: Sampling & Testing Equipment Technician proficiency
Independent Assurance Project-Based IA (Old System) Split samples taken with Acceptance samples Specified intervals Observe Sampling and Testing procedures Investigation of deviations
Independent Assurance Project-Based IA (Old System) Sample frequency based on size of project Asphalt Concrete 1 per 15,000 tons (app. 19 lane miles) Consistency between projects?
Independent Assurance System-Based IA (New System) Proficiency samples on yearly basis Check documentation of equipment / personnel Includes DOTD and non-dotd personnel Investigation of deviations
Independent Assurance System-Based IA (New System) Currently focused on asphalt Plan to expand to concrete and soils May change routine sampling to incorporate the system approach
Laboratory Accreditation QA requires conformance to standards adequate, qualified staff AASHTO R 18 Establishing and Implementing a Quality Management System for Construction Materials Testing Laboratories
Laboratory Accreditation AASHTO R 18 Inspection and proficiency samples Documentation of equipment and training Demonstration of testing proficiency Verification of equipment
Laboratory Accreditation Materials Lab AMRL Accredited since 1988 Accreditation extended to District Labs through inspection Co-Op testing 2 / year Check equipment and training records Responses required for deficiencies
Laboratory Accreditation New specification for Asphalt Concrete Options for Acceptance testing by DOTD or contractor Method 1 DOTD runs Acceptance, Contractor Verifies Method 2 Contractor runs Acceptance, DOTD Verifies Dispute Resolution Accredited Lab
Laboratory Accreditation New specification for Asphalt Concrete Options for Acceptance testing by DOTD or contractor Must be AASHTO R 18 accredited for tests Contractors and DOTD Districts accredited directly Everyone on the same playing field!
Laboratory Accreditation Contractors with Hot Mix Labs 31 of 39 Accredited District Labs 4 of 9 Accredited (so far )
Proficiency Sample Program Check all active technicians for proficiency All technicians performing acceptance tests Approximately 100 technicians statewide Split samples on yearly basis Requires response to deviations
Proficiency Sample Program 2.550 Gmm (Co-Op 9 Districts) 2.540 2.530 2.520 2.510 2.500 2.490 2.480 Data Mean Rating 5 (1SD) Rating 3 (2SD) Outliers 2.470 2.460 Standard Deviation = +/- 0.019
Proficiency Sample Program 2.505 Gmm (Proficiency Program) 2.500 2.495 2.490 2.485 2.480 Data Mean Rating 5 (1SD) Rating 3 (2SD) Outliers 2.475 2.470 Standard Deviation = +/- 0.005
Proficiency Sample Program Standard Deviation on Gmm Louisiana 0.0050 National 0.0068
Proficiency Sample Program Standard Deviation on Gmm Louisiana 0.0050 Lower deviation makes us happy!! National 0.0068 This makes us happy too!!
What does it mean?? Roadway Density used as basis for pay Gmm used to calculate average roadway density
Average Density What does it mean?? Gmm vs. Density / Pay 93.00 $520,000 92.90 92.80 $500,000 92.70 $480,000 92.60 92.50 $460,000 92.40 $440,000 2.490 2.492 2.494 2.496 2.498 2.500 2.502 Gmm Total Pay Avg. Density Pay
What does it mean?? Roadway Density used as basis for pay Gmm value used to calculate average density 0.48% change in Gmm = 10% pay reduction That s $50,000 on 5700 tons!!
What does it mean?? Everyone on the same playing field Confidence in results DOTD and Contractors working toward same goal QUALITY ROADWAYS!
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