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

  • Guntert & Zimmerman now offers a new concrete paver
    January 6, 2017
    Guntert & Zimmerman (G&Z) continues to develop its slipformer range with the addition of the new S850SL, a multi-purpose, mid-size paver. Features to boost its versatility include swing legs and the firm’s novel telescopic ends. This machine follows on from the S600 launched first in the domestic US and then on the international market. Like its smaller sibling the new S850 shares key options including the patented AccuSteer, slew drive track control and SmartLeg swing leg systems.
    Read More
  • Guntert & Zimmerman now offers a new concrete paver
    January 30, 2013
    Guntert & Zimmerman (G&Z) continues to develop its slipformer range with the addition of the new S850SL, a multi-purpose, mid-size paver. Features to boost its versatility include swing legs and the firm’s novel telescopic ends. This machine follows on from the S600 launched first in the domestic US and then on the international market. Like its smaller sibling the new S850 shares key options including the patented AccuSteer, slew drive track control and SmartLeg swing leg systems.
    Read More
  • Energy absorbing safety barrier
    March 9, 2012
    Barrier Systems says that its new tensioned barrier offers high energy absorbing capabilities in head-on collisions. The company says that this is because the X-Tension technology is a tension-based solution rather than compression-based. The new range delivers good performance in these applications, as energy is absorbed with resistance at the impact head rather than being transferred down the rail as occurs with other systems. Even high-angle (15° during testing) impacts on the nose resulted in the vehicl
    Read More
  • UK’s M6 tolled motorway for sale
    June 21, 2016
    For sale: one UK toll motorway along with operating business. Well maintained. Price negotiable. David Arminas looks at what is on offer As if right on cue, a French articulated truck starts to back up along the hard shoulder at an exit area of M6toll. The manoeuvring is watched from an office inside the nearby M6toll headquarters. Inside, Andy Pearson, chief executive of M6toll, glances over his shoulder and interrupts his presentation to World Highways. “He’s probably missed the dedicated wide-load
    Read More

Highlighted Content