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

Idea Status (this will be updated by the moderator) : Need Statement #496

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