Asphalt Yields Benefits Beyond Quick Construction Time

News from the Asphalt Pavement Association of Oregon Volume XIX, Issue 1 Spring 2015

PAVEMENT DESIGN Asphalt yields benefits beyond quick construction time

In Bend, an entire roundabout was reconstructed with asphalt at the intersection of Newport and College Way in just three days. It would have taken almost four weeks to complete the project with concrete, which would have severely and negatively impacted several local businesses.

The roundabout was reconstructed in three days with asphalt. It would have taken almost four weeks

to complete the same Newport and College Way roundabout, Bend, Oregon project with concrete. lations were typically done with stand turning and shoving,” an asphalt layer of only three he explained. APAO (then) “Closure time was a big issue,” inches, which delivered a service Executive Director Jim Hud- said Hardy Hanson, streets life of about eight years. dleston helped develop the for- manager for the City of Bend. mula for the asphalt mix that “Several businesses would have “Four years ago, not realizing was used at the Newport/College INSIDE been stifled for that (extended) why our asphalt installations Way installation. period of time,” he added. Even were performing below expec- ▲ Asphalt yields benefits with the three-day closure tation, we began to renovate “This section of asphalt was beyond construction time required for asphalt construc- with concrete. That worked well, designed to meet perpetual (cont.) Page 2 tion, the work was scheduled to as long as we had good detour pavement criteria,” Huddleston ▲ Hickey assumes APAO fall over a weekend in order to routes (because of extended said. “With routine inspection director role Page 2 minimize impact to the college closure times required by con- and maintenance, this pavement ▲ Bits & Pieces Page 2 and nearby businesses whose crete),” Hanson said. The City should perform indefinitely, with later discovered that a thicker wear confined to the surface ▲ High-albedo pavements bring customers, students and staff unintended consequences to rely on the roundabout for access. asphalt section would perform where it can easily be milled and urban head island effect very well in such applications. filled on a regular interval.” Page 3 Hanson reports that the City of Bend has installed approximate- “Now we’re using a nine-inch The bottom two lifts of the pave- ▲ City of Eugene leads the way asphalt section with a mix ment were designed with lower in RAP Page 4 ly 28 roundabouts over the past 10 to 12 years. Previous instal- designed specifically to with- (continued on page 2) PAVEMENT DESIGN

Hickey assumes APAO Asphalt yields benefits — continued executive director role air voids and higher binder On January 1 content to ensure long-term John Hickey durability against water, freeze/ became APAO’s thaw dynamics, and oxidation. fourth execu- The higher binder content also tive director in improves resistance to crack- the organiza- ing; and the higher-than-normal tion’s 45-year compaction specified for the history. He assumes the role lower lifts will go even further to following Jim Huddleston’s ensure long life. retirement from the position.

Newport and College Way roundabout John served APAO for seven “The expectation years as the board’s attorney. He a new inlay would be needed,” example and others. Beyond its practiced construction law since is that we will get 2006, and previously worked as a 10 to 15 years of service Hanson said. “And that work fast construction time–which is would require a single evening a fraction of the time required registered civil engineer. from the reconstructed closure, rather than closure for to construct concrete–asphalt is “I worked with lawyers when roundabout before a new weeks to accommodate a more often less costly to construct at I was a civil engineer, and it inlay would be needed.” extensive rehabilitation project,” the outset. The Newport/College seemed most of them weren’t he added. Way roundabout, for example, familiar with the technical Hardy Hanson cost approximately 20 percent issues they were representing,” Subsequent research sup- less to construct with asphalt ports Hanson’s projection. “We John said. “I saw an opportunity than with concrete. Life-cycle for someone who knew both the The top lift of asphalt is designed reviewed construction records costs can be lower as well. With technical and legal sides, and with a polymer-modified binder and learned that the (Bend) a properly designed and con- that’s when I decided to become a with excellent resistance to rut- roundabout at Colorado and structed perpetual pavement, construction attorney,” he added. ting and shoving at the surface. Century, designed by ODOT for example, 15 to 20 years may This is particularly important and constructed in 2000, has an pass before an inlay treatment is The decision for John to subse- for a roundabout, where centrif- eight-inch asphalt section,” said required. quently leave his law practice ugal force exerts outward stress Kevin Ramsey, Bend street and join APAO’s staff was a on the pavement as each vehicle supervisor. “That installation Choosing the right pavement natural one. “The biggest fac- travels its circular path. The is now 14 years old and dem- for any project hinges on several tor is the people I work with at modified binder also provides onstrates no surface distress,” considerations, not least of which APAO. They are some of the best improved resistance to aging he said. Ramsey projects that is the acceptable length of time people I’ve met in my life. All of and oxidation. it could be four years or more for a given location to be closed these contractors compete with before that roundabout requires to traffic. In addition to speed of one another, but they’re also like “The expectation is that we will a new inlay. construction, asphalt offers even family. It makes this association get 10 to 15 years of service from more advantages–including lon- unique,” he said. the reconstructed roundabout Asphalt offers multiple advan- ger life and lower costs–that con- at Newport/College Way before tages over concrete, in this crete cannot match. ▲ “Our priorities at APAO will not change,” John said. “We’re here BITS & PIECES to educate on asphalt design and construction; to partner with Infrastructure Funding ODOT; and to develop and pres- The current federal authorization for highway funding expires May 31, 2015. Please write your con- ent our training programs. As gressional delegation and ask them to pass a long-term highway bill with increased funding. With- an industry, we continue to face out additional funding, our infrastructure will continue to degrade, which will inhibit the growth challenges with the funding of of our economy and make our transportation system less safe. Continuing to wait to properly fund infrastructure maintenance and infrastructure improvement would also increase the overall cost to the public because the cost of improvement, and will face new repairs increase as conditions worsen. challenges in the future, like workforce development.” Congress won’t increase highway funding unless we tell them it’s critical. Ways to notify your con- gressional delegation are available at www.dontletamericadeadend.com and www.asphaltpavement. Huddleston remains onboard to org. Please also encourage your co-workers, employees, family, and friends to write as well. consult on technical issues and to ensure a smooth transition. ▲

2 Centerline/Spring 2015 MISSION STATEMENT EDUCATION

The Asphalt Pavement Association of Oregon, Inc., (APAO) is dedicated to promoting the use of asphalt concrete by developing customer driven High-albedo pavements bring unintended programs to enhance quality and excellence in all aspects of asphalt technology. We believe that the key to growth and prosperity in the industry is continuous quality improvement obtained consequences to urban head island effect through active association membership, positive customer relationships, education, and training. High-albedo materials have water content; and other adverse been promoted uncritically for While reflective pavements human health impacts like addi- their ability to reflect heat back tional UV radiation exposure. MEMBERS to the sky and away from our would seem a logical increasingly developing urban approach toward reducing Field studies and modeling have For quality asphalt projects, shown that while surface tem- areas. They’ve gained acceptance the UHI effect, a host of call one of our members. as a solar-energy reflector on peratures can be decreased by reflective pavements, “there is no Regular Members: 7 Peaks Paving, LLC; Baker Rock Resourc- rooftops, for example, and subse- other factors indicates es; Bayview Transit Mix; Copeland Paving, Inc.; Eagle-Elsner, quent efforts have been made to that in some cases, discernable difference” in tem- Inc.; Granite Construction Company; Granite Construction peratures above the surface of Northwest Columbia 1; H & H Paving Co.; Hampton’s Inc.; implement them at lower eleva- Harney Rock & Paving Co.; High Desert Aggregate & Paving, these pavements have the sizable pavements with differing Inc.; Humbert Asphalt; James Perrigo Construction, LLC; tions (paved surfaces and pave- JF Shea; Kerr Contractors; Knife River - Idaho Division; Knife ments) as a potential tool for potential to exacerbate it, albedos. Reflective rooftops have River - Northwest; Knife River - Materials; Kodiak Pacific even been shown to generate Construction Co.; Lakeside Industries, Inc.; Mt. Hood Asphalt urban heat island mitigation. making urban areas Products, Inc.; North Santiam Paving Co.; Old Castle Materi- elevated temperatures above the als - Eugene Sand Construction; Old Castle Materials - Salem even hotter. Road and Driveway; Oregon Mainline Paving; Pioneer Asphalt, According to the U.S. Environ- surface, and in the case of large- Inc.; Porter W. Yett Company; Portland Road & Driveway; Road mental Protection Agency, the scale deployment, can adversely & Driveway Co.; ROBCO, Inc.; Rocky Mountain Construction; Roy L. Houck Construction Co.; S-2 Contractors; S-C Paving urban heat island (UHI) effect As noted in the report, a reflective- impact surrounding rural areas Company; South County Asphalt, LLC; TFT Construction; Tide- water Contractors, Inc.; Vancouver Paving Co.; Wildish Sand is defined as “the phenomenon only approach mainly considers with higher temperatures. & Gravel Co. whereby urban regions experi- that solar energy reflected from ence warmer temperatures than Due to the potential adverse Associate Members: Ad-Tek Calibration; AggReCon West; pavements travels directly back affects mentioned above, Albina Asphalt Company; Antigo Construction Inc.; Blue Line their rural surroundings.” to space. Cars, trees, pedestrians Transportation; CEI Enterprises Inc.; CMI Roadbuilding Inc.; researchers concluded that use Caterpillar Global Paving; Clyde/West, Inc.; Construction and the built environment, how- Equipment Co.; D’Ambra Equipment & Supply; DeAtley Crush- Over the past two decades, pro- of reflective pavements exclu- ing Co.; DynaPac USA; Exxon Mobil; Idaho Asphalt; Maxam ponents of reflective pavements ever, all play a role in intercepting sively as a means to mitigate the Equipment, Inc.; McCall Oil; Modern Machinery; Northwest and redirecting energy that radi- Shingle Recyclers; Papé Machinery; Peterson CAT; Recycled (typically concrete pavements) UHI effect is premature, pend- Asphalt Solution, LLC; Reliable Asphalt Products, Inc.; Road- have heavily promoted their ates from the pavement. From ing further investigation. The Tec, Inc.; Troxler Electronic Laboratories; U.S. Oil Trading LLC; the cited literature, the study Valero Asphalt Marketing; Volvo Construction Equipment, N. materials exclusively as a means most appropriate solutions will America; Western States Asphalt; Windsor Rock Products; identified potential for “substan- Zydex Inc. to mitigate the urban heat incorporate a mix of several dif- island effect. This position has tial unintended consequences” ferent tactical approaches, and Affiliate Members: ACS Testing; AGC Oregon Columbia Chap- with this approach, including ter; Alliance Testing Services; ALLWEST Testing and Engineer- made its way into green build- will vary by geographic location ing, LLC; American Concrete Company; Anchor Insurance & ing programs and the awarding increased cooling loads in adja- and local environmental condi- Surety; Anderson-Perry & Associates, Inc.; Asphalt Pavement cent buildings; increased heating Technologies; CM Consulting; Carlson Testing; College of of LEED credits that promote tions. Additional research will be Engineering; Coral Constructing Co.; David Evans & Associ- demands during cold weather; ates; FEI Testing; Fred Bond Consultant; GeoDesign, Inc.; the use of concrete over asphalt, required to model different solu- GeoPacific Engineering; Jordan Ramis, PC; KE & Associates; solely for its reflective qualities. snow and ice buildup; reduction tions, quantify the effects, and Materials Testing & Inspection; Mayes Testing Engineers, Inc.; in precipitation, runoff and soil MeadWestVaco, Corp.; Northwest GeoTech, Inc.; NW Natural; develop an effective strategy. ▲ OCAPA; Oregon Institute of Technology; PSI-Portland; Pave- While reflective pavements ment Services Inc.; Pinnacle Western Inc.; Safety Electric Inc.; Scott Hookland, LLP; STRATA, Inc.; Terracon Consul- would seem a logical approach A copy of the report is available from the Arizona State University National Center of Excellence tants; Thermo Fluids, Inc.; Umpqua Testing Services; Ward toward reducing the UHI effect, for SMART Innovations: http://ncesmart.asu.edu/news/unintended-consequences Insurance; Whole Brain Creative, Inc.; Yazbeck, Cloran & Bowser, PC; Yelton, Inc. a host of other factors indicates

For member contact information, visit www.apao.org and click that in some cases, these pave- the membership tab. ments have the potential to exacerbate it, making urban Centerline is published four times a year by: areas even hotter. A report from Asphalt Pavement Association of Oregon 5240 Gaffin Road SE, Salem, OR 97301 Arizona State University, Unin- Ph (503) 363-3858 Fax (503) 363-5571 tended Consequences, by Jia- chuan Yang and Drs. Zhihua President: Todd Allen Vice President: Mike Curtis Wang and Kamil Kaloush, Secretary/Treasurer: Tyrone Belgarde examined the literature for miti- Executive Director and Editor: John Hickey gating the UHI effect through the use of reflective roofs and pavement materials.

Centerline/Spring 2015 3 PRSRT STD US POSTAGE PAID PORTLAND, OR PERMIT #2580

Asphalt Pavement Association of Oregon

5240 Gaffin Road SE Salem, OR 97301

EDUCATION City of Eugene leads the way in RAP The City of Eugene is aggres- Cost savings resulting from Several recent City projects con- sively testing asphalt mixes higher RAP content can be sub- tained as much as 35 percent with high percentages of recy- stantial. In a previous Center- reclaimed binder. Increased cled asphalt pavement (RAP), line story (Summer 2012), Dr. binder replacement works par- going so far as to exceed maxi- Ray Brown of the National ticularly well with warm mix mum RAP content percentages Center for Asphalt Technology asphalt–another environmen- specified by ODOT. They are the estimated that 70 percent of the tally-friendly pavement design– first entity in Oregon to do this. cost of hot mix asphalt lies in the that the City already specifies materials, and up to 50 percent as standard. “That’s a plus,” There are several drivers behind of binder and aggregate costs Willer said. “We’re also using the effort, according to Jenifer could be saved by fully leverag- softer binder to offset our higher “Using RAP means less Willer, P.E. and pavement pres- ing RAP content. RAP content, with softer binder ervation program manager for asphalt waste in landfills. providing the additional perfor- the City of Eugene. Willer notes that APAO’s mance benefit of less cracking But there’s also potential research has provided confidence “One of the reasons we’re explor- and rutting.” for economic benefit. to move forward with mixes con- ing higher levels of RAP content taining higher RAP content, and “This is emerging technology,” Our local contractors is to meet City sustainability that the City has worked closely Willer said. “It’s important to do are as eager to do this goals,” Willer said. “Using RAP with APAO on projects construct- your research and be mindful of means less asphalt waste in as we are. They have ed in Eugene over the past two mix design principles—I can’t landfills. But there’s also poten- years. “We provided APAO with stress that enough.” huge stockpiles of RAP tial for economic benefit,” she standard mixes and mixes with and this is a cost-effective explained. “Our local contrac- increased binder replacement The City of Eugene’s program tors are as eager to do this as we is initially focused on low-vol- way to reuse material and for comparison,” she said. “It’s are. They have huge stockpiles of too early to judge performance of ume residential streets with lower their production cost.” RAP, and this is a cost-effective the constructed projects, but the low loading. Performance data way to reuse the material and and continued testing of new Jenifer Willer, P.E. APAO tests have all been posi- lower their production costs,” tive,” she said. mix designs will guide further she said. expansion of the program. ▲