Colorado Department of Transportation Hot Mix Asphalt Crack Sealing and Filling Best Practices Guidelines.

摘要

Crack sealing and filling on hot mix asphalt (HMA) pavements are cost-effective pavement preservation techniques that improve pavement performance and extend the life of existing pavements. If performed in a timely and effective manner, crack sealing can extend the life of HMA pavements. The Colorado Department of Transportation (CDOT) supports the sealing of cracks on HMA pavements. Under Study No. 11.40, CDOT Pavement Crack Seal and Fill Best Management Practices, CDOT sponsored this study to update its procedures and guidelines for crack sealing and filling of HMA pavements. The draft Guidelines included in this report reflect CDOT experience, current state-of-the-practice, and the most recent research findings, and address where and when to perform crack sealing and filling, material selection, installation methods, construction inspection, and follow-up evaluation. Three primary tasks were undertaken to meet the project objective including a literature review and survey of agencies, a draft of recommended best practices guidelines, and recommended procedures for monitoring, evaluating, and documenting the effectiveness of crack sealing and filling methods and materials. Implementation: Once the final guidelines are developed, CDOT will broadly communicate the existence of the new guidance, highlighting any changes and how they will contribute to improved performance. Developing and presenting a 2- to 4-hour workshop and training session on improved crack sealing practices would also benefit all maintenance crews engaged in the activity.