Centerline (Longitudinal) Joint Adhesive Performance: Two to Three-Year Review

摘要

This report discusses preliminary evaluations of adhesive use along longitudinal paving joints on hot mix asphalt pavements to help prevent longitudinal cracking. Seven pavements where adhesive was applied to the vertical or sloped face of the first lane paved prior to overlaying the second lane are being evaluated for development of centerline cracking and ravelling. Three pavements were overlaid in 2004 and four pavements were overlaid in 2005. Three adhesive products made by different companies were used at bead widths of 2 inches and 4 inches. The 2 inch bead was used on all pavements while the 4 inch bead was used on two pavements. All but one pavement had non-adhesive (control) section. This report only evaluated the use of longitudinal joint adhesives on overlays, although the adhesive could be used on the top layer of newly reconstructed pavements. This is a review of the distress found after at least one followup visit to all sites. A summary of the literature search is also presented. Conclusions from the limited data available were that longitudinal joint adhesives sections appear to be performing as least as well or better than non-adhesive sections. Further, using adhesives along centerline paving joints appears to be practical partial solution to longitudinal joint cracking. Additional site evaluation is required to determine long-term performance and cost effectiveness of the longitudinal joint adhesives.