ROUGH ROADS IN GEORGIA, MINNESOTA RECEIVE TREATMENT WITH DIAMONDS

Two projects in Georgia and Minnesota have been the beneficiaries of a unique solution. Diamond saw blades were used to grind a new surface onto the highway. First introduced in 1958, the process has experienced rapid and technological advancement and, especially in the past 10 years, widespread acceptance by highway departments across the country. The first project in Georgia involved cracking of concrete slabs and spot deterioration (spalling) of the 12-year-old concrete road surface, coupled with extreme joint faulting. The solution to the problem was to use diamond saw blades to grind a new surface onto the highway. Another example of successful surface grinding is 29.2 miles of 12-foot lanes on Interstate 90 in Western Minnesota. All four lanes had developed a serious curling problem caused by a simple settling of the soft limestone and river gravel substrata. It was determined that the settling condition had stabilized, eliminating the need for extensive pre-grinding preparations like the pressure grouting and new drainage procedure used on the Georgia project. The Minnesota contractor used four grinding rigs equipped with diamond impregnated saw blades, allowing the "truck" and passing lanes to be refinished in one pass each.

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  • Accession Number: 00195329
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Aug 28 1979 12:00AM