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

  • Machine control technology shortens road contract
    May 28, 2013
    The use of sophisticated machine control technology has helped halve the schedule required for a road contract – Jeff Winke. By using the latest machine control systems on the equipment fleet, a US contractor has managed to halve worker hours, machine time and overall costs. “We chopped 50% off the contract schedule,” said Jim Swenson, licensed professional land surveyor for Oregon Mainline Paving based in McMinnville, Oregon. “The project was completed a year ahead of the two-year schedule,” he explained.
    Read More
  • Versatile concrete paving
    February 8, 2012
    GOMACO has designed its new GP-2400 concrete paver to be highly versatile, able to slipform tight radii as well as widths of up to 7.3m. The machine runs on the firm's 3m series two tracks to permit the tight turn capability and also reduce transport width to just 3m. The sophisticated GOMACO G+ control system is fitted and this comes with a self diagnostics package for grade and steering. The system is said to feature easy-to-operate hardware with steering and travel dials as well as buttons to control ele
    Read More
  • Cost-saving compact twin layer asphalt paving
    February 28, 2012
    Twin-layer paving offers high quality, long lasting road surfaces to be constructed. Paver manufacturer Dynapac is one of the pioneers of the twin-layer paving technique, which it calls Compactasphalt. According to Dynapac this method offers major benefits to contractors and clients alike as roads surfaced using this technique last longer and are cheaper to maintain. To ensure contractors have maximum utilisation of their machines, Dynapac offers a modular paver system that can be operated using the convent
    Read More
  • Machine control developments from Leica Geosystems, Topcon, Trimble and Wirtgen in the slipforming sector
    July 1, 2013
    Machine control technologies were pioneered in the concrete paving sector with systems having been used for over 10 years. Leica Geosystems was the first of the machine control technology suppliers to offer these systems on concrete slipforming machines and has developed a strong position in this segment. However the company met resistance from some quarters in the construction market and specialist Karl Soar said that some contractors were very reluctant to give up using conventional stringlines. He said,
    Read More

Highlighted Content