Association News

ACPA Adds Instagram as Communications Resource

ACPA has added Instagram® to the list of available digital communications resources.   Instagram is a mobile device application where people share stories through photographs and infographics and short descriptions.  

Instagram is a quick way of sharing information in real time with a growing universe of followers.  Instagram was launched for Apple devices in 2010, and added Android capabilities in 2012.   ACPA first tried the technology during the 53rd annual meeting in December, and based on the large number of responses, has been posting photos and short descriptions since then.

A number of ACPA members also are on Instagram now, which makes the app a popular way to share photos and information that reflect association activities, while also sharing images posted by member companies as well. 

For those interested in Instagram, the mobile app is available through the Apple App Store (for IOS devices) and Google Play (for Android devices).   Current users can find ACPA at: #Concrete_Pavement_Association/

Other digital resources ACPA commonly uses include Twitter, Facebook, LinkedIn, and YouTube/Google Videos.

Make Plans to Attend ConExpo-Con/Agg

Make plans to attend ConExpo-Con/Agg 2017, scheduled for Tuesday, March 7, through Saturday, March 11 at the Las Vegas Convention Center, Las Vegas.   Held every three years, the show focuses on construction, aggregates, an300x250-ceca2017-225d ready mixed concrete.

The event is expected to include more than 2,500 exhibitors and more than 140 education sessions on a wide range of construction and materials topics.   ACPA will be exhibiting at the show in booth S60323 (South Hall).

Several new features are planned for 2017, including a 7,500 sq ft exhibit called the “Tech Experience,” which will focus on emerging technologies, innovative wearables, new materials, new safety and productivity technology and more.

Also planned for 2017 are 700 new exhibitors and education tracks; new technology to help visitors keep track of and follow-up with exhibitors; a “ConExpo-Con/Agg” radio broadcast; and a NASCAR weekend ticket offer.   The event also will feature a new badge-pack that includes free transportation options, access to exhibits, discounts at local bars and restaurants, and entry to the “Tech Experience.”

Click here to learn more or to register for the show.   

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.

Associations Brief Congress on Industry Priorities

NACA senior officials met with members and staff of the Congressional Cement Caucus.

The North American Concrete Alliance* met the Congressional Cement Caucus in Washington, D.C., on February 5 to present a briefing on the state of the cement and concrete industries and infrastructure priorities for the 115th Congress.  

Jim Toscas, Portland Cement Association’s President & CEO, kicked off the briefing with an overview of the industry and its goal of speaking with a strong, unified voice.  The briefing continued with brief remarks by senior officials representing the 11 NACA-affiliated associations.

Leif Wathne, ACPA Executive Vice President, offered comments on behalf of the association.  Two key points he made were:

  • ACPA works closely with the National Academies of Science; the American Association of State Highway and Transportation Officials; the Federal Highway Administration, Federal Aviation Administration, and the Department of Defense Tri-Services’ engineering commands.
  • ACPA senior staff and members also provide testimony before relevant Congressional Committees of jurisdiction, as we readily offer industry perspectives on policy matters, funding, research, and other topics associated with our Nation’s surface transportation infrastructure.

Following the briefings, there was time for questions & answers, which provided further insights into infrastructure priorities, which are gaining visibility, awareness, and traction in Washington, D.C. 

The Congressional Cement Caucus is co-chaired by Rep. Charlie Dent (R-Pa.-15) and Rep. Ruben Gallego (D-Ariz.-7).

_______________________________
*  NACA member organizations participating in the briefing included the American Concrete Pavement Association; American Concrete Pipe Association; American Concrete Pressure Pipe Association; American Concrete Pumping Association; Concrete Reinforcing Steel Institute; National Concrete Masonry Association; National Precast Concrete Association; National Ready Mixed Concrete Association; Portland Cement Association; Precast/Prestressed Concrete Institute; and the Tilt-Up Concrete Association.

Showcase Focuses on Two-Lift Concrete Pavements

Showcase participants had the opportunity to visit the two-lift concrete pavement construction site. (Photo: ACPA.)

As part of the second Strategic Highway Research Program (SHRP2) program’s Project R21, a technology showcase was held on January 31 in Burbank, Calif.   The focus of the showcase was two-lift concrete pavement construction, and the event drew roughly 70 people representing industry and the public sector. 

As a lead state for implementation of SHRP2 R21 technologies, Caltrans, along with Federal Highway Administration, co-sponsored the showcase.   The event began with a technical program featuring several agencies’ experience with two-lift concrete paving (including Caltrans, the Illinois Tollway, Minnesota DOT, Tennessee DOT, Texas DOT, and Virginia DOT), followed by a field visit to an ongoing two-lift paving project on Interstate 210 near Montrose, CA. Leif Wathne, ACPA Executive Vice President, was on hand for the event and provided insights on the technology during the discussions.

The project involves a 12-in. thick jointed-plain concrete pavement comprised of a 8-in. bottom lift and a 4-in. top lift. The bottom lift features two separate concrete mixtures, one with reduced cement content and one with recycled concrete aggregate.

About Project R21
Project R21 involves the development of design and construction guidelines for new composite pavement systems, including concrete pavements placed in two-lifts using a wet-on-wet process. Two-lift concrete pavements are said to provide significant potential benefits, including improved surface characteristics, reduced agency costs, lower energy costs, and reduced environmental impacts

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