Better Roads

HighwayContractor 20 June 2014 Better Roads we could pave without using a material transfer vehicle." He also points out that the bar helps the contractor know when the number of haul trucks is not matched to the paver speed. "When we properly match our trucks to the paver speed, it helps to limit heat segregation, by keeping the paver moving," Niemi says. "We need to dump the belly dumps so that there are no gaps in the windrow. Keep them tight." Niemi says Anderson updated its Pave IR system so that it has Internet capability and can send data to the cloud. The Minnesota DOT requires this now. Johnson of Minnesota says the state requires continuous thermal profi les behind the screed on all driving lanes. For 2014, the state will provide a $20 incentive for achieving a "good" thermal segregation rating on each 150-foot seg- ment of pavement. The Pave IR system will rate segregation as "good" if the maximum temperature on the mat is between 0 and 25 degrees Fahrenheit higher than the minimum tem- perature. Temperature differentials between 25 and 50 degrees rank as "moderate" segregation and differentials of more than 50 degrees get a "severe" ranking. That is the system used by the Texas DOT, and it was picked up by Minnesota. Minnesota also will penalize contractors by $20 per 150- foot segment for those segments that receive a "severe" rating. "Then the data has to stream up to the cloud," Johnson says. "That's a requirement too, because we've been doing this in- telligent compaction here for the past few years, and we only get 30 to 40 percent of the data if we do it with a manual transfer. So we're trying to do better than that." In Texas, the spec permits contractors who use Pave IR Text INFO to 205-289-3789 or visit www.betterroads.com/info Text INFO to 205-289-3789 or visit www.betterroads.com/info PB ASPHALT PATCHERS WORLD CLASS PATCHERS SINCE 1957 WORLD CLASS PATCHERS SINCE 1957 At PB we understand pothole patching. For over 57 years, we have designed quality Patchers that are durable, long-lasting and built for year-round use. When you need a pothole patcher, look to PB, we have solutions to meet your needs. Proven Patchers available with a variety of features and capacities from 1.5 to 10 cubic yards. www.pblcorp.com PB Corporation I 5778 W Barstow Ave I Fresno, CA I 800-350-8521 TRUCK MOUNTED • HOOK LIFT • DUMPBODY SLIP-IN • TRAILER MODELS Call 800-350-8521 Northeast Asphalt, in Appleton, Wisconsin, uses a temperature bar to assist with paving a roadway in Wisconsin. Photo courtesy of MOBA Email: info@mobilebarriers.com www.mobilebarriers.com ® HighwayContractor_BR0614.indd 20 6/2/14 2:51 PM

• Cover
• ROAD SCIENCE: Down to the Dirt: Intelligent and new technologies are revolutionizing soil compaction. Better Roads takes a look at new technologies of soil compaction, covering high performance vibration via variable drum frequencies, high and low amplitu
• APPLICATIONS & INNOVATIONS: Minnesota's New Solutions for Aging Pavement: Using myraid concrete pavement restoration techniques, this state DOT minimized cost and traffic disruption while maximizing longevity and optimizing results.
• New Road Products
• Advertiser Index
• Marketplace
• HIGHWAY CONTRACTOR: Fighting Thermal Segregation: A temperature bar can provide a thermal profile in real time to protect against inconsistent densities that can occur if freshly paved asphalt pavement becomes too cool and does not compact properly.
• Transportation Talk: Better Roads Editor-at-Large Tina Grady Barbaccia talks with the U.S. Transportation Secretary Anthony Foxx.
• In Court: No License Doesn't Mean No Payment: Unlicensed contractors on federal construction projects are entitled to payment under the Miller Act.
• The Last Word: Material Handler Tries to Destroy B15 Smartphone: The phone is dropped from 35 feet, plunged in water and more, but can it pass the "Tina Test?" Web Extra Video