Tag Archives: concrete pavements

Concrete Pavements Prominent at SWIFT Conference

ACPA was among several concrete pavement industry organizations participating in the 2017 Summer Winter Integrated Field Technologies (SWIFT) conference and trade show, held recently in Halifax, Nova Scotia.

Prior to the formal meeting of the Canadian Airfield Pavement Technical Group (CAPTG), a special workshop was held to address, “How to Design Sustainability Into Airfield Pavements.”

Workshop speakers included Gary Mitchell, P.E., ACPA’s Vice President of Airports and Pavement Technology, and Peter Taylor, Ph.D., P.E., Director of the National Concrete Pavement Technology Center, an ACPA technology partner.  Mitchell presented on concrete pavement recycling practices and technologies. Taylor presented on the importance of the life-cycle perspective and performance-engineered mixtures.

The formal SWIFT meeting followed the workshop and included moderated discussions and presentations.  Industry officials presented on several topics during Tuesday and Wednesday sessions.  These included: 

  • Stringless paving by ACPA’s Mitchell, as well as several ACPA members and technology partners.
  • Runway grooving for improved braking performance and directional control by John Roberts, Executive Director of the IGGA/ACPA Concrete Pavement Preservation Partnership and John Depman, P.E., Senior Estimator, Penhall Company. 
  • Rapid airfield repair using precast by Chris Olidis, P.E., Principal Engineer, Applied Research Associates, an ACPA member.
  • Optimized concrete pavement design by Robert Rodden, P.E., Lead Engineer, PNA Construction Technologies, an ACPA member. 

Also, moderating the Wednesday technology track was Guillaume Lemieux, Director, Markets and Technical Affairs, Cement Association of Canada, an ACPA affiliate.

SWIFT offers the airport community the opportunity to gather and learn about new pavement design, construction, evaluation and maintenance techniques; materials; chemicals; systems; and equipment available to keep airports safe and operational while addressing any challenges, at minimal cost, during all seasons. 

Special thanks to Amy M. Dean, Editor-in-Chief and Art Director, International Society of Concrete Pavements, for her generous support with this article.   To read the Amy’s complete article, please follow this link

FHWA Issues AID-PT Annual Report

FHWA publishes an annual report of AID-PT results and benefits.

The Federal Highway Administration has released its 2017 Accelerated Implementation and Deployment of Pavement Technologies (AID-PT) program annual report.   The 28-page report includes case histories and other summary benefits of the program.

The AID-PT program was the result of a legislative provision that was championed by ACPA and first included in the Moving Ahead for Progress in the 21st Century Act (MAP 21).  This ACPA-led initiative created both a mechanism and funding for the delivery of pavement technology for both the concrete- and asphalt-pavement industries.  

Since 2012, the Federal Highway Administration has administered AID-PT with direct input from industry, including ACPA, which remains actively involved in assisting FHWA with support for the program, including continuing to advocate for renewal of the program in highway reauthorization efforts, as well as communicating program results and benefits to the concrete pavement industry. In 2015,  again with strong support by ACPA and other stakeholder groups, Congress included the program in the Fixing America’s Surface Transportation (FAST) Act, which provides funding through 2020.

Since its inception, the program has resulted in benefits to the concrete pavement community, including contracts and cooperative agreements with being directed to the National Concrete Pavement Technology Center (CP Tech Center), an ACPA Technology Partner.  AID-PT has had direct and tangible benefits for highway agencies, contractors, consultants, and academia.  Concrete overlays and performance-engineered concrete mixtures (including the use of recycled concrete aggregates) are two technology initiatives that have received support in the form of outreach, education & training, and technology transfer.

ACPA to Lead Visioning Session for Concrete Pavements

The American Concrete Pavement Association is gathering a group of members and specifiers to envision the future of concrete pavements in the year 2040.  The visioning session, called Vision 2040, will take place after the fall meeting of National Concrete Consortium meeting, on September 21 in Minneapolis.  

Vision 2040 is being modeled after a similar visioning session  that took place 20 years ago. 

The previous initiative was called, “Creating a New Generation of Pavements,” and was initiated by ACPA in 1997.   The result was five goals and a series of prioritized research and development, technology transfer, and technology implementation needs intended to help the industry reach those goals.  The statements were referred to as a “blueprint,” and became the basis for the “Concrete Pavement Road Map” published in 2005.  ACPA estimates about 80% of the blueprint has come to fruition and been completed over the last 20 years.  

Vision 2040 will provide key stakeholders with the opportunity to look forward and revisit needs, discuss aspirations and set priorities for concrete paving.  For more information about Vision 2040, contact Leif Wathne at 202.638.2272 or lwathne@acpa.org.

Pavement Design Web Solution Moves Forward

As reported at the ACPA Mid-Year meeting, the co-branded, web-based pavement design application being developed by ACPA, the NRMCA Research Foundation, and PCA, has taken some decisive steps forward.  

Development efforts led by ACPA’s Andy Gieraltowski and Eric Ferrebee have advanced to the point where many design modules are now ready for beta testing.  ACPA announced the software is also on track for availability in the fall of 2017.

ACPA promoters and project partners selected the name PavementDesigner.org for the new website.  When it goes live, pavement engineers, technical personnel, professors, and students will have a one-stop site to design cement-based pavement solutions.  Previously, the associations sold separate windows-based design applications. 

The new website will be free to use and not require software to be installed or updated.

Report Offers Insights into SPS-2 Concrete Pavements

The Long Term Pavement Performance (LTPP) SPS-2 study, or Strategic Study of Structural Factors for Rigid Pavements, represents the most comprehensive set of concrete pavement performance data in the United States, according to a report by Larry Scofield, P.E., IGGA/ACPA.  Scofield has been studying and evaluating the SPS-2 pavements, and has prepared a brief report that shows some interesting details about the pavements that comprise the LTPP test sections.

Map show states constructing SPS-2 projects (and year of construction). The pavement design features evaluated are: concrete thickness (8” and 11”); base type; flexural strength; lane width, and drainage.

Scofield reports the SPS-2 experiment consists of 12 LTPP test sections constructed in each of 14 states ranging in age from 15 to 23 years (2015), with the first project constructed in Kansas in 1992.  The original experimental design for the SPS-2 experiment consisted of 192 test section, but only 120 (63%) were constructed.  This will hinder future statistical analysis to some degree.  

Four states constructed replicated sections of the original design, thereby producing 48 additional test sections.  Of these, three states are in the wet-freeze zone and one state is in the dry-freeze zone.  This resulted in a total of 168 SPS-2 test sections.  In addition, 40 state supplemental sections were constructed and evaluated for a total of 208 sections.

  • Of the original 144 SPS-2 core test sections constructed, 83% (119) of the test sections are still in service after 16 to 24 years of traffic.
  • Of the original 40 SPS-2 State Supplemental test sections constructed, 90% of them are still in service after 16 to 24 years of traffic.
  • Of all the SPS-2 test sections constructed (core and supplemental) 84% are still in service after carrying traffic for 16 to 24 years.
  • The SPS-2 experiment has a higher percentage of surviving sections than any other SPS project. 
  • Since 84% of the SPS-2 test sections are still in service after 16 to 24 years of traffic, the experiment has outperformed all other LTPP experiments, providing evidence of concrete pavement’s long-life characteristics and the potential to sustain heavier axle loads than currently designed for.

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