Видео

This video provides an update on the North Dakota DOT HMA program from the 2024 season and a view ahead to the 2025 paving season. Tyler Wollmuth, PE, Assistant Materials Engineer is the presenter. Posted Jan 27, 2025

This video provides an update on using e-ticketing and future goals at the NDDOT. Scott Clausen, PE, Construction is the presenter. Posted 12.31.24

This video describes the use of and data collection from ground-penetrating radar to analyze a section of pavement in the Grand Forks District. Curt Dunn, PE, Grand Forks District is the presenter. Published 12.31.24

Joshua Ide, Minot district presents in video 4. He gives an overview of the most common errors he sees in an asphalt paving workbook - and tips on how to avoid them.

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.

Drum Dryer on the Asphalt Plant

Asphalt Field Labs

Inspection for the Field Lab Tester

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)