Pavement Preservation Journal - Spring 2015 - (Page 10)

By Tom Kuennen A technical conference last year gave needed focus to hot in-place recycling (HIR) and cold in-place recycling (CIR), and its implementation from coast to coast. The 2014 International and Western States In-Place Recycling Conference was held Aug. 5-7 in Denver, and drew delegates from the Eastern seaboard to the West coast, and from Alaska to New Mexico. A panel of presenters from other countries gave overviews of in-place recycling from China, South America, Denmark, Finland, Germany, Ireland, the Netherlands and Norway. With a theme of Revitalizing In-Place Pavement Recycling Technologies: Gaps, Barriers and a Path Forward, the conference served a pent-up need to discuss the state of the practice in in-place and full-depth recycling, and answer the question of why HIR and CIR aren't utilized more widely than they are. The conference set a direction for increased use of the processes in the years to come, and underscoring this effort was a conference-concluding workshop conducted by the Texas Transportation Institute at Texas A&M University, which examined the future of in-place recycling and how to get it more universally specified. While in-place recycling has been around since the 1930s, it wasn't until the Arab oil embargo of the 1970s that a financial incentive - skyrocketing prices of petroleum - appeared to favor in-place recycling. After a huge boost from 1970s into the 1980s, in-place recycling technologies improved incrementally since the 1980s, with no great leaps in implementation or utilization, and with some agencies using in-place recycling less. Furthermore, while its utilization is scattered geographically, use of HIR, CIR and FDR - the latter out of the bounds of pavement preservation - still appears to be regional in scope, "Regional use appears to be associated with industry's physical location and marketing as well as public acceptance," workshop descriptive On opening session panel, Colorado DOT acting chief engineer Scott McDaniel welcomes delegates to Denver 10 IMAGE CREDITS: TOM KUENNEN HOW FP2 WORKS FOR YOU Hot, Cold In-Place Recycling Gets Boost at Western States Conference ARRA president Pat Faster, Gallagher Asphalt, provides rousing opening comments to assembly on behalf of Asphalt Recycling & Reclaiming Association material states. "As public agency officials and industry change, so does the general acceptance of in-place recycling. The benefits of the various forms of in-place recycling need to be based on their proven economic, engineering and environmental advantages in the various climate regions of North America. In-place recycling needs to be more of an engineering science than a construction art form." At the conference, delegates separated into four breakout sessions: CIR, headed by ARRA technical director Stephen Cross and Ergon's Scott Metcalf; FDR, headed by Colorado DOT's Bill Schiebel and Heritage Research Group's Jason Wielinski; HIR, led by FHWA's Tim Aschenbrener and Colorado DOT's Jay Goldbaum, and hot in-place remixing, helmed by Asphalt Institute's Dave Johnson and TTI's Terri Parker. PROMOTE SPECIFICATIONS The Federal Highway Administration is doing its part to View past issues of the Pavement Preservation Journal online at

Table of Contents for the Digital Edition of Pavement Preservation Journal - Spring 2015

President’s Message
Hot, Cold In-Place Recycling Gets Boost at Western States Conference
Fort Collins HIR Project Provides Delegates with Up-Close Look
NCAT Reports 2012 Cycle Results, 2015 Preservation Activities
New Congress Means New Push Toward Reauthorization
FP² at TRB
Pavement Preservation in Spotlight at World of Asphalt 2015 in March
Control Potholes by Sealing Cracks, Joints in Advance
‘Thinlay’ Asphalt Overlays Next Word in Pavement Preservation
Texas Considers Ultra-Thin HMA Alternatives to Seal Coats
Thin Overlays Can Preserve Pavements as Well as Reduce Surface Noise
In California, Scrub Seals Gain Favor for Cost, Crack Sealing
IGGA Recognizes Leaders in Grooving, Grinding
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Pavement Preservation Journal - Spring 2015