Quantifying Benefits of Improved Compaction

Status:  Active
Project Start Date:  07/23/2018

Summary:

Higher air voids in the mat, especially over longitudinal joints, lead to poor pavement durability. The problem is compounded as water infiltration increases through higher air void areas, leading to more required maintenance at longitudinal joint locations and possibly requiring earlier reconstruction of the pavement. Infiltration of moisture in higher air void joints also leads to reduced strength of underlying pavement layers which accelerates deterioration when the moisture undergoes freeze-thaw cycling in the pavement structure. To improve upon current asphalt pavement compaction practices in the state of Minnesota, the research team plans to create a database of historical data to quantify the effect of air void content on pavement performance from confined and unconfined joints. Improvements will come in the form of modification to current construction practices and/or new standard methods.

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