CALIFORNIA TEST "QUIET" GRINDING

The Santa Clara Valley Transportation Authority is testing a new method of "microgrinding" to rehabilitate an existing concrete road. The system will grind away irregularities from a 10-mile stretch of pavement in a test of the technique. The grinding is done with parallel saw-wheels that produce "textured" grinding with longitudinally placed diamond blades. They produce a corduroy-like surface with 164-193 grooves per meter across and peaks less than 2 mm from the bottom of the blade grooves. A second grinding with blades 2.41 mm wide and 19 mm apart will follow. A preliminary study showed that over a 35-year lifecycle, grinding saved nearly half the expense of installing asphalt overlay. Grinding reduces spikes of frequencies from traffic above 1,250 hertz, the point when noise becomes an irritant.

  • Availability:
  • Corporate Authors:

    McGraw-Hill, Incorporated

    330 West 42nd Street
    New York, NY  United States  10036
  • Publication Date: 2005-1-24

Language

  • English

Media Info

  • Pagination: p. 15
  • Serial:
    • ENR
    • Volume: 254
    • Issue Number: 3
    • Publisher: McGraw-Hill, Incorporated
    • ISSN: 0891-9526

Subject/Index Terms

Filing Info

  • Accession Number: 00986876
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Files: BTRIS, TRIS
  • Created Date: Mar 2 2005 12:00AM