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

  • Material transfer vehicles see advances
    July 9, 2020
    Material transfer vehicles offer a buffer between asphalt trucks and pavers, optimising flow, and new models coming to market offer improved performance
    Read More
  • On track for excellence in asphalt plants
    May 30, 2013
    While one leading asphalt plant company has played a key role in the creation of the new Circuit of the Americas F1 racetrack, others have been releasing new plants and plant-related technology onto the market, some of which has been exhibited at major world industry shows. Guy Woodford reports. Astec played an important role in the new Circuit of the Americas Formula 1 racetrack in Austin, Texas. The asphalt base, binder, and surface courses for the 5.47km asphalt road course, which staged its first F1 rac
    Read More
  • Hitex speeds surface repairs
    June 24, 2014
    Hitex surfacings have been developed for export markets and have approval for use in different territories. The firm is now exporting the products for use in South East Asia and Latin America and has contracts to use the materials for repairs on a busy highway in India. The Hitex products are suitable for permanent repairs and use recycled materials, with applications including use on wider joints and cracks as a preventative treatment method. A spokesperson for the firm said, “We try to get councils to
    Read More
  • Increased use of RAP in asphalt production
    December 8, 2015
    In the US asphalt pavement mix producers are improving the sustainability pro_ le of roads through the incorporation of recycled materials and the use of energy-saving warm-mix asphalt technologies. According to the latest survey of asphalt mix producers conducted by the National Asphalt Pavement Association (NAPA) in partnership with the Federal Highway Administration (FHWA), more than 67.65 million tonnes of recycled materials was put to use in new asphalt pavement mixtures during the 2014 construction
    Read More

Highlighted Content