Reuse the Abused
Roads & Bridges
May 2007
By Stephanie Harris
As roads deteriorate and costs rise, benefits of asphalt recycling become more apparent
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Reporting Live
Roads & Bridges
May 2007
By Sameh Zaghloul, Ph.D., P.E., P.Eng., and T. Joseph Holland, Ph.D., P.E.
Caltrans takes study out of the laboratory for real results
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In Place of Failure
Roads & Bridges
May 2007
By Michael Heitzman; Hosin “David” Lee; Jungyoung “Joe” Kim; Don Chen; and Charles T. Jahren
After years of just doing it, Iowa finds positive long-term performance of CIR layer
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Three Degrees of Cold
Roads & Bridges
May 2006
By Jim Schwarz, Contributing Author
Today’s milling contractor needs to stock up on latest and most complete line of equipment
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Must be Exact
Roads & Bridges
May 2006
By Gary Sidlar Contributing Author
When done right, precision milling carries heavy benefits in urban areas
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Recycling In Place
Roads & Bridges
May 2006
By Rodney Garrett, Contributing Author
Contractor finds many benefits in on-site crushing and screening
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Together they can move
Roads & Bridges
May 2005
Asphalt Recycling & Reclaiming Association
The Asphalt Recycling & Reclaiming Association (ARRA) and the environment in 2005
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Reclaiming/Recycling
Roads & Bridges
May 2005
James R. Rosenmerkel, P.E.
Industrial byproducts help contractors rebuild in Wisconsin
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Energy comes naturally
Roads & Bridges
May 2005
By Stephen Damp
With oil prices over $55 a barrel this year leading to asphalt cement prices hovering around $200/ton and diesel regularly selling for $2/gal or more, the cost benefits gained by recycling deteriorated pavements has grown substantially.
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States achieve recycling success
Roads & Bridges
July 2004
By Jason Harrington
Similar to Minnesota’s experiences, MDOT has found that RCA used in base and sub-base material can provide performance comparable to or better than using virign aggregate.
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Uni-cycle
Roads & Bridges
May 2004
What better place to recycle than right on the road? Newer and more dependable technologies for both cold and hot recycling are leading more and more street and highway departments to choose in-place recycling.
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Bright alleys
Roads & Bridges
May 2004
Information provided by Wirtgen America, Antioch, Tenn.
“But by 2000 we were inundated with pothole complaints and we found we had about 1,100 alleys we needed to resurface after no work on them having been done for 20 years. We had a significant backlog.”
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A resolution with stamina
Roads & Bridges
October 2003
Approximately 50% of U.S. rural interstate mileage and almost 60% of urban interstate mileage is rated in fair to poor condition. Highway funding just can't keep up in maintaining the current state of our roads, let alone upgrading those roads and highways to an acceptable condition. Montana is finding that emulsion cold in-place recycling (CIR) is a cost-effective solution.
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Just Following Policy!
Roads & Bridges
October 2003
Foamed asphalt lets Ulster County, N.Y., keep its roads open to local and tourist traffic while they undergo complete recycling and stabilization as base material prior to overlay.
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Polishing Monuments
Roads & Bridges
October 2003
Michael L. Polak
The Asphalt Recycling & Reclaiming Association (ARRA) has just recently spent two years producing the Basic Asphalt Recycling Manual (BARM) endorsed by the Federal Highway Administration. The BARM will introduce road managers to the recycling technologies that are available today.
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Sharpen Those Incisors
Roads & Bridges
October 2003
Allen Zeyher, Associate Editor
Although most of the new products in this section are bigger and more powerful than their predecessors, there are still machines available for every application. This month, Roads & Bridges has gathered a sample of recent introductions of recycling/reclaiming machines and cold planers used for grinding up and recycling pavement.
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A Love For the Crush
Roads & Bridges
October 2002
Rick Zettler
Independence Recycling has grown into a major-league success story. From humble beginnings as a local recycle contractor with a single portable crushing and screening plant started primarily to handle demolition materials generated by its sister company, today the company employs 60, operates nine portable horizontal shaft impact crushing plants producing in excess of 3 million tons of spec product per year and services a broad customer base east of the Mississippi River.
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The Common Cold?
Roads & Bridges
October 2002
Mickey Cereoli
Roughly 30 years ago, Bomag pioneered some of the first cold in-place asphalt recyclers in the roadbuilding industry. This was not only a new piece of equipment, it was the introduction of a new concept. Today, several manufacturers have introduced cold in-place asphalt recycling equipment. Though credibility has been established through education and successful applications in many states and counties, understanding the process and its benefits remains the key challenge to its acceptance as a viable road reconstruction option.
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Back to Being Super
Roads & Bridges
October 2002
The first sustained efforts to recover and reuse old asphalt paving materials were conducted in the mid 1970s. With financial support of the Federal Highway Administration (FHWA) and technical assistance from trade associations such as the National Asphalt Pavement Association and the Asphalt Institute, more than 40 states placed demonstration reclaimed asphalt pavement (RAP projects by 1982. RAP is now routinely used in nearly all 50 states.
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Do Not Throw Out
Roads & Bridges
October 2002
Bill Wilson
All over the U.S., community recycling programs do not cater to anyone. The road paving business, on the other hand, is at your service. They'll set up a work zone for you, haul in a milling machine or an excavator with a concrete breaker for you, operate the heavy machinery for you and haul it away for you.
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Viewing the Fill as Half Glass
Roads & Bridges
May 2002
Allen Zeyher
Walking on broken glass is probably a bad idea, but driving over broken glass might be a good idea if the glass is used as fill under the road. crushed glass fill is part of a $5.6 million, federally funded project driven by the need to replace a narrow three-span bridge over the Big Wood River.
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Hard Doesn't Mean Stale
Roads & Bridges
October 2001
Bill Wilson
New cold in-place recycling claims to strengthen asphalt pavement
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Foam on Bottom
Roads & Bridges
May 2001
Blair Barnhardt
States like Georgia find inexpensive base for asphalt rehab
PDF Version
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Going in Cold
Roads & Bridges
March 2000
Todd Thomas, P.E., John Huffman, P.E., and Arlis Kadrmas
Partial depth cold in-place recycling (CIR) has been performed throughout North America for many years. The process is used to eliminate surface irregularities, especially cracking.
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A Hot, In-place in the Sun
Roads & Bridges
October 1999
by Larry Flynn
Hillsborough County, Fla., takes a torch to its road maintenance costs by making hot-in-place recycling of asphalt pavements a key element in its program.
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Handling RAP in an HMA Facility
Roads & Bridges
April 1999
Dale Decker
In the HMA facility, the RAP must be dried and heated prior to mixing into the HMA. Heat transfer to the RAP can be accomplished either conductively or convectively. Conductive heat transfer is used in almost all batch facility applications and when RAP is introduced in counterflow dryers while convective heat transfer is used in conventional batch plant aggregate dryers and parallel-flow drum mixes.
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RAP Mix Design for HMA Pavements
Roads & Bridges
February 1999
Dale Decker
The second in a three-part series on the use of reclaimed asphalt pavement (RAP) in hot-mix asphalt (HMA) focuses on RAP mix design techniques. In March, the handling of RAP in the HMA facility and placement and performance issues will be addressed.
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State of the Practice for Use of RAP in Hot-mix Asphalt
Roads & Bridges
January 1999
This is the first in a three-part series of articles on the use of reclaimed asphalt pavement, known as RAP, in hot-mix asphalt (HMA). The articles are excerpted from a report published by the National Asphalt Pavement Association on the state of the practice of the use of RAP. In this installment, we’ll examine the generation and handling of RAP materials. In February, mix design techniques will be discussed. In March, the handling of RAP in the HMA facility and placement and performance issues will be addressed.
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The Smooth - Quiet Pavement
Roads & Bridges
January 1999
Dale Decker
Studies have shown that, to the motoring public, smoothness is chief among the factors of what makes a good roadway pavement; but achieving such a pavement is not as easy as it may sound.
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RAP Alters Asphalt Plant Design
Roads & Bridges
January 1997
David Banasiak
The increased use of reclaimed asphalt pavement has altered the way hot-mix asphalt is processed.
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Reclamation: What's Old is New Again
Roads & Bridges
October 1996
Larry Flynn
Old, worn pavements in Moriah, N.Y., 'reclaim' life as new base material through use of cold in-place recycling, a new reclaimer-stabilizer and calcium chloride
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Reclaimers Cut Costs for Michigan Counties
Roads & Bridges
October 1996
Daniel C. Brown
Aged asphalt pavements are recycled using reclaimer-stabilizer machines and combination of rejuvenators to liven resulting reclaimed base material
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