February 2015

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February 2015 | Construction Equipment Distribution | www.cedmag.com | 35 nuclear density gage, typically measured at a single location every 100 feet. Conventional testing will identify a problem area, but only if you happen to land your test on the problem area. "We probably know the compaction level of less than 1 percent of typical sites today," said Downing. "e power of intelligent compaction is unleashed when combining measuring systems with machine location with a full documentation map. Now the question is, how do you manage that?" Because it would not be feasible for the government agencies to purchase proprietary soware systems, the development of soware – called Veda – to allow project personnel to view and analyze the data from IC machines was made possible through the Federal Highway Administration (FHWA) and the Minnesota DOT (MNDOT) with the assistance of e Transtec Group, a pavement engineering and design firm. Veda displays the compaction infor- mation along with graphs and maps. Contractors need to provide data that can be uploaded into the Veda system. Contractor Perception Despite the benefits of IC, most contrac- tors are not enthusiastic about adopting it. e machines and aermarket solutions are expensive. Aermarket solutions or upgrades from traditional rollers represent $20,000 to $50,000 in addi- tional cost to the contractor. "Until the DOTs spec it in their jobs, it is tough to get any traction," said Tory Williams, an RDO Equipment Co. regional product specialist in Arizona and California. Dave Dennison, product manager for Bomag, concurs. "At the point IC is mandated, then dealers will have an opportunity." 'It comes down to convincing the contractor that with this equipment, they will be better than they were before," said Downing. "Some may, some not. e system could just document that they are doing their best work." Katie Pullen, brand marketing manager, Case Construction Equip- ment, believes operator resistance is minimal on IC machines. "For opera- tors, it is taking the control out of their hands, which may feel different from their day-to-day operating. However, using intelligent compaction allows contractors to put a newer operator on the machine and it will help them understand how to run the compactor more efficiently." Dealers should keep an eye on DOTs across the nation as they begin to spec IC on more projects. Depending on location, the timeframe for implementa- tion will vary. With experience under the industry' belt and positive results, most experts believe a major expansion of intelligent compaction is underway. Watch It Grow According to George Chang, PhD, PE, of e Transtec Group, who is among those spearheading the spread of intelligent compaction, more than 33 states are committed to using IC on at least two projects. Other states, such as Indiana and Washington, are moving forward with it on their own. More than 18 states have developed intelligent compaction specifications for either asphalt or soil. As those projects are completed, DOTs will be making deci- sions about how to move forward. Minnesota was one of the early IC adopters, and MNDOT recently announced full implementation of intelligent compaction by 2018, meaning IC would be required on 100 percent of the projects that meet certain require- ments. Implementation will increase gradually over the next few years. In 2015, 10-15 percent of projects meeting the requirements must use IC; in 2016, 40-50 percent and in 2017 50-75 percent. Positive results are driving MNDOTs decision. e agency has noted a 30-percent increase in compaction uniformity on projects utilizing IC, and up to a 30-percent decrease in thermal segregation through the change in (continued on next page)

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