COMPACTING STONE MATRIX ASPHALT

Stone matrix asphalt mix designs (SMA) are reviving use of the static drum roller because of potential damage to the SMA with vibratory rollers. There is more stone-on-stone contact with SMA with a high proportion of asphalt cement and polymer additives to bind and seal the material. SMA is strong, but is not suitable for every application because of its higher cost and difficulty in applying properly. Compaction is especially important that it be done correctly so that the aggregate is not crushed, which would compromise its design life. SMA applications today can require more than twice the pounds per linear inch of typical drum rollers. This is where static rollers can be used because the drive drum can provide the needed weight. They also are less expensive to operate and so can keep costs down on SMA jobs. Also, the static roller can be used at every stage of an SMA project, with one roller acting as the breakdown and intermediate roller and another the finishing roller.

Language

  • English

Media Info

  • Features: Photos;
  • Pagination: p. 48-51
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01001685
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Files: BTRIS, TRIS
  • Created Date: Jul 7 2005 12:00AM