Campaign: Traffic and Safety

Comprehensive Investigation of Aggregates in Asphalt Mixture Designs and Relationship to Compaction

Compaction is the most crucial factor in constructing durable asphalt pavements. The current asphalt mixture designs use a target of 4% air voids, however, the mixtures are compacted in the field at a target of 7% air voids and in some instances as high as 10% air voids are allowed. Recent research has shown that a different approach, in which the mixtures are designed at 5% and compacted at 5% in the field, could result ...more »

Submitted by (@dave.vandeusen)

Idea Submitted by : Dave Van Deusen; John Garrity

List your MnDOT Office,District,City, County, Univ. or Other : OMRR

Idea Champion - Who at MnDOT/LRRB? : John Garrity

Why is this a priority and what are the benefits for the State/County/City? :

This is a priority for road owner agencies because asphalt mixture density is the primary factor affecting long-term pavement performance.

 

Primary benefits are:

 

1. A better understanding of aggregate materials properties and how they affect the constructability of mixtures they are used in; and

 

2. Improved mixture design procedure to reconcile differences that currently exist between assumptions made in the lab and reality in the field.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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Campaign: Materials and Construction

Test Methods for Verification of Low-Temperature Cracking Resistance of Asphalt Binders and Mixtures

Low-temperature cracking continues to be the number one distress in Minnesota. While progress has been made in developing fracture mechanics tests to obtain relevant material properties, there is a need to develop simpler test methods and analyses that can be used on a routine basis and at lower costs to verify the properties of asphalt materials used in construction of Minnesota pavements. These test methods are: ...more »

Submitted by (@dave.vandeusen)

Idea Submitted by : Dave Van Deusen; John Garrity

List your MnDOT Office,District,City, County, Univ. or Other : OMRR

Idea Champion - Who at MnDOT/LRRB? : John Garrity

Why is this a priority and what are the benefits for the State/County/City? :

In order for performance testing to be fully implemented in MN quick, reliable test procedures are needed so that construction acceptance decisions in a timely manner.

 

Primary benefits to road owners and industry include improved procedures for specifying and designing asphalt mixtures in light of heightened sustainability requirements and project-specific performance requirements, reduced construction costs, extended pavement life and reduced maintenance costs.

Project Type - MnDOT or LRRB / Research, Implementation or TRS : MnDOT Research

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