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Matt Todd, Minot district covers some basic asphalt field lab inspector responsibilities, including references to supporting manuals.

Lynette Steyn, Grand Forks district talks about an asphalt project that includes Percent Within Limits (PWL) Special Provision. This includes how combining two days of production to achieve the minimum tons required.

Travis Walker from the Minot district gives an overview of setting up, using, and troubleshooting the workbook if you see an error message.

Asphalt supply system at asphalt plant, from delivery of asphalt binder to the site, the pump system, understanding 'volume' of asphalt' and adjusting to 60 degrees F.

Understanding the basics of RAP, stockpiling, bin splits, and how it is incorporated into the final product.

Overview of the asphalt mix design for use on your project. Highlight the 'specs - or target value' for asphalt mix production testing. Gradation and blend percentages, AC content, Control Sieves, 1/2, No. 4, No. 30, and No. 200.

What is the purpose, and types of plants you may see: batch or drum dryer. Drum dryer plants may be a parallel or counter flow type.

Communication is essential between the plant inspector and the paving inspector.

Asphalt cores are taken for the determinization of in-place density each day. What other tests are needed to calculate density? Taking asphalt binder samples.

Values from the Cut-Off report represent the asphalt binder used. This becomes a factor in calculating the asphalt content. Tracking the deliveries of asphalt, understanding the 'manifest.' English and Metric conversions to determine tons for pay. The calculations are included in the 'paving workbook'

Daily Report from the 'paving workbook', entering in the CARS Materials drop box, brief overview of plant safety.

How the drum dryer works, parts of the plant, aggregate drying, where the asphalt binder is added, 'flights' in the drying drum, RAP conveyor (collar), a thermal camera image of the drum.

View of a field lab, contractor and engineer's lab, the specification for labs including required equipment, placement at plant site,

Quick overview of inspection items to watch for at an asphalt plant. How the plant is running, check scales and balances, stockpiles, and the daily inspection diary.

Plant Calibration Silo

Plant Startup

Production Material Testing Tolerance and Uniformity of Tests and AC Content

Qualified LabTesters

Qualified Lab, Quality Control Plans, Equipment List

Role of Inspector

ND Standard Specifications and the Field Sampling and Testing Manual

Terms And Definitions for Hot Mix Asphalt (Spec Book 430)

Understanding Asphalt Plant Inspection

E-Ticketing at the NDDOT

What is Percent Within Limits (PWL)?

ND T 84 Specific Gravity and Absorption of Fine Aggregate (2022)

Percent Within Limits (PWL) Projects at the NDDOT

Field Sampling and Testing Manual (FSTM) Updates

PWL Calculations and Project Review