Efficient concrete overlays

Concrete overlays have a long history and proven success in the state of Iowa. Mitchell and Worth counties in north central Iowa have led the way. In the past three years, they have put down approximately 241km of 102mm concrete overlay. Concrete Foundations Inc. (CFI), based out of Hiawatha, Iowa, has slipformed almost 80km of the counties' overlays, including 45km this paving season near the town of Osage. CFI has slipformed most of the overlays with its GOMACO two-track GP-2600 paver. This season, the co
February 15, 2012 Read time: 2 mins
Efficient concrete overlays are being achieved with the use of stringless controls

Concrete overlays have a long history and proven success in the state of Iowa. Mitchell and Worth counties in north central Iowa have led the way. In the past three years, they have put down approximately 241km of 102mm concrete overlay.

Concrete Foundations Inc. (CFI), based out of Hiawatha, Iowa, has slipformed almost 80km of the counties' overlays, including 45km this paving season near the town of Osage.

CFI has slipformed most of the overlays with its 218 Gomaco two-track GP-2600 paver. This season, the company added the Leica Geosystems stringless system and a new GOMACO four-track GHP-2800 paver to the inventory. Both were put to work on the project near Osage.

The new unbonded concrete overlay is 6.7m wide, and the material is placed directly on the existing asphalt surface of the roadway. The surface only has to be swept clean before the mix is dumped on it and concrete slump averages around 13-25mm.

The firm has seen increased production with fewer people needed for stringline maintenance and setup. Five site personnel who normally worked with the stringline are now used elsewhere during the paving process. The lack of stringline also allows them to focus more on quality and production rather than stringline maintenance.

The GOMACO GHP-2800 is pulling burlap for a burlap drag finish behind the paver. Finishers work behind the paver with bull floats before a texture/cure machine applies a longitudinal tine and white spray cure.
Concrete milling, paving & compaction

For more information on companies in this article

Related Content

  • Market for GPS machine control systems growing fast
    February 14, 2012
    The sector for machine guidance systems is growing fast as contractors become more and more aware of the benefits of using this technology. Increased speed, working accuracy and cost effectiveness are key benefits of this technology, with just three firms, Trimble, Topcon and the Hexagon Group, dominating the market. The Hexagon Group is perhaps the newest entrant to the sector, having acquired Leica Geosystems and Scanlaser in recent years. John Fraser is sales and marketing manager at Scanlaser, and expla
    Read More
  • Advances in materials testing
    April 10, 2012
    Quicker, better, more cost effective materials testing - Kristina Smith writes. Most developments in materials testing technology involve updating and upgrading existing machines, either to meet changes to standards or to satisfy new needs in the market. And occasionally, a manufacturer will come up with something completely new. PUMA - the precision unbound materials analyser - falls into the latter category. It has been developed by Cooper Research Technology and Nottingham Transportation Engineering Cen
    Read More
  • Asphalt paver performs well on difficult roads
    February 15, 2012
    Italian paving contractor VARESCO has made good use of its new AP500E paver from Caterpillar Paving on two difficult jobsites. One was a confined site with an abundance of manholes. The other one featured a road with a slope so steep the transport truck trailers were covered to prevent material from spilling out the back. The confined site required paving of an access road leading to a residential area in Merano, a town of 38,000 in northern Italy.
    Read More
  • Epoxy for Ethiopia
    March 10, 2022
    Paving trials using epoxy resins in the Netherlands and New Zealand could lead to similar paving in Ethiopia, reports Kristina Smith.
    Read More

Highlighted Content