C+S March 2020 Vol. 6 Issue 3 (web)

Pooled Fund project, which included 12 participating state department of transportation: Georgia, Indiana, Kansas, Maryland, Minnesota, Mississippi, New York, North Dakota, Pennsylvania, Texas, Virginia, and Wisconsin. The report's Executive Summary states that the project "demonstrated tried-and-true Intelligent Compaction (IC) technologies through six- teen (16) field projects and open house activities, numerous meetings and training for State personnel and local earthwork/paving contrac- tors, and assistance on the development of State IC specifications." The IC project's key conclusions: • IC mapping of existing support layers is effective in identifying weak sup- port areas for corrective actions prior to the compaction of the upper layers. • With hot-mix asphalt (HMA) paving, IC tracking compaction roller passes and HMA surface temperatures can provide the necessary means to maintain a consistent rolling pattern within optimal ranges of temperatures for cover- age of 100 percent of the construction area. • IC technologies can be especially beneficial to maintain consistent rolling patterns under lower visibility conditions, such as night paving operations. IC technology, the report stated, will have profound influence on the responsibilities of various stages of pavement constructions and will eventually help produce better and more consistent pavement products. "We are currently running Topcon C-53 IC Systems on two Caterpillar CB-534 D XW rollers, and two systems on Bomag BW190 AD roll- ers," stated Brown. "At the time of purchase, the C-53, which offers the GX-55 control box, was the newest technology available. "We like that the technology provides for remote mobile access via Sitelink to allow process balance decisions to be based on real-time data for the entire paver/roller operation, which in turn ensures that optimal production rates and density values are consistently achieved." Topcon Positioning Systems offers an intelligent compaction system that is designed to track pass counts of multiple rollers or IC machines working on the same project. Through secure connectivity to Topcon's global Sitelink3D service, each compactor not only performs its tasks, but also becomes part of the overall monitored project. "Each operator is not only able to see their own passes, but those made by other machines on-screen in real time," Brown said. "And in real time, the paving superintendant, foreman, and general contractor per- sonnel can also see what exactly is going on via the Sitelink platform. This ensures proper compaction from each machine and eliminates redundancy." The IC system is designed to: • Leverage multiple integrated temperature sensors, so each compactor can achieve consistent results through constant feedback into the system.

• Ensure that regulatory IC standards are being met by documenting surface stiffness values through its accelerometer.

• Connect to the Sitelink3D Enterprise service which provides 24/7 access to project data, team collaboration, custom reporting, as well as standard export to Veta management and analysis software, which can provide ad- ditional customized information. • Provide data to demonstrate specification compliance and confirm proper density claims. "We're using the Topcon C-53 IC System with a GX-75 control box on our 850 Series Sakai oscillation/vibration paving roller, which al- lows the machine operator to monitor the compaction pattern and the temperature as they're working," stated Sergio Muniz, paving superin- tendent with Payne & Dolan, Inc., Waukesha, Wis., who acquired the system working through his local Topcon Solutions Store. "I like that I can jump onto my laptop and see the work being completed in real time and make certain we're complying with the tough DOT state specifications." Muniz added: "We're finding the Topcon system to be essential for our high-profile big jobs to ensure we remain on task and is instru- mental for when we work at night. It also is proving handy for smaller parking-lot-type jobs as well." The key benefit of IC is greater control over the compaction results, which in turn provides better finished paved results. Compaction at its most elemental is the exertion of force on something so that it becomes more dense, while Intelligent Compaction provides the technological means to ensure that compaction is performed consistently, thoroughly, and accurately. The goal is to achieve optimum densities that ensure adequate support, stability, and strength. Achieving these densities uniformly is key, and clearly IC aids this process.

• Provide accurate pass counts, geographic locations of each run, as well as georeferenced task assignments and their completion via its GNSS technology.

JEFF WINKE is a business and construction writer based in Milwaukee, Wiscon- sin. He can be reached through jeff_winke@yahoo.com.


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