Promoting the Film Formation and Flexibility of an Asphalt Emulsion Sealer with the Addition of Fibrillated HDPE Fiber

摘要

As a follow-up study to a previously reported increase in film flexibility, the film formation at temperatures from 45 to 115 ℉ of an asphalt emulsion-based driveway sealer with and without the post-addition of fibrillated high-density polyethylene (HDPE) fiber was investigated. Utilizing six different grades of synthetic fibers, the nominal diameter and the nominal length of the fiber varied from 5 to 15 microns and from 100 to 900 microns, respectively. The propensity for film formation generally increases with fiber size; short fibers promoted less film formation than medium or large fibers. In addition, film formation has been shown to generally increase with fiber application rate while film forming trend increased from 0.5% to 1% to 2% fiber. Furthermore, a strong correlation between film formation and the ultimate elongation of the film has been observed.