New guide to durable joints

Front cover of the Guide to the Prevention and Restoration of Early Joint Deterioration in Concrete Pavements

Through a contract with the Iowa Highway Research Board (TR-697), the CP Tech Center has developed a concise Guide to the Prevention and Restoration of Early Joint Deterioration in Concrete Pavements (December 2016). The guide provides background information about the causes of premature joint deterioration; many of the concepts parallel research related to performance-engineered mixtures. The final chapter on specification guidelines contains live links to supporting Iowa DOT publications.

This guide should be useful not only in Iowa but in all Snowbelt states; it is accompanied by a tech transfer summary outlining the most relevant concepts.

Spring NCC meeting

The National Concrete Consortium will meet April 25-27, 2017, in Salt Lake City, Utah. See online page for registration and hotel reservation information.

Spring webinars

Registration is open for new 90-minute webinars being offered in spring/summer 2017. Register for the dates and times that work best for you.

Best practices for jointed concrete pavements (developed through a contract with FHWA):

Dowel Basket Anchoring Methods

March 16: 12:00 noon Central, or March 30: 10:00 a.m. Central
Register online
Dowels are the most common form of load transfer in concrete pavements. They come in various sizes, shapes, and materials. To perform optimally over the course of the pavement life, they need to be oriented appropriately and within tolerable location limits in the slab. Proper placement ensures optimal load transfer with minimal added stress to the pavement. For this reason, attention to dowel placement during paving is important, and ensuring that dowel placement accuracy is maintained through paving is a necessary quality control activity. Instructor: Jerry Voigt, ACPA

Concrete pavement recycling (developed through an agreement with FHWA):

Environmental Considerations in Concrete Pavement Recycling

March 15, March 29, or May 18: 10:00 a.m. Central
Register online
As agencies are looking for opportunities to become more sustainable in their stewardship of public infrastructure, many are looking at applications for recycling existing concrete pavements on projects. This webinar gives practitioners an overview of the issues, approaches, and environmental benefits of RCA as a valuable engineered material. Topics include water quality, air quality, noise, waste generation, and minimizing/mitigating these issues. Instructor: Tara Cavalline, UNC-Charlotte

Construction Considerations in Concrete Pavement Recycling

April 5, April 19, and or May 3: 10:00 a.m. Central
Register online
Incorporating RCA into a project's design so that it is beneficial to the projects execution, realizes potential cost savings, and maintains or even results in material properties better that virgin material, requires thoughtful consideration by the designer and the contractor. This webinar addresses construction considerations for achieving the desired performance and cost savings while realizing sustainability goals. Topics include how to give the contractor flexibility in how to recycle, what products make economic sense, specifications, and project quality management. Instructor: Gary Fick, Trinity Construction Management Services

Case Studies in Concrete Pavement Recycling

May 24, June 21, or July 12: 10:00 a.m. Central
Register online
RCA has been used successfully in various applications on hundreds of paving projects built throughout the United States since the 1940s. This vast national experience offers many lessons. This webinar provides a working knowledge of opportunities for using RCA in pavement applications by reviewing the design, construction, and performance of concrete pavement recycling projects that have helped to shape current recommended RCA practices. Topics include structural design issues when using RCA in any layer, recycling D-cracked or ASR-damaged concrete, beneficial mix design modifications when using RCA, advancements in construction equipment, and documentation of economic benefits. Instructor: Mark Snyder, Engineering Consultant

Advancing PEM

In February AASHTO will publish a new provisional specification on performance-engineered mixtures, PP 84. This culminates a concerted effort of the CP Tech Center and its research partners working on behalf of FHWA, state agencies, and industry partners.

Now agencies and industry are invited to join a 5-year FHWA pooled fund (solicitation 1439) to participate in follow-through activities to ensure that agencies can specify, and contractors can deliver, concrete mixtures that reliably and sustainably meet performance needs in any given environment. These activities include significant training and assistance for all staffing levels, from the design office through construction.

Efforts will cover a variety of topics, such as

  • Identifying critical properties based on project location
  • Selecting tools to monitor compliance
  • Conducting new tests properly
  • Developing mixtures that meet requirements while improving their sensitivity to batching and construction processes and reducing financial and environmental impacts

Lab technician hired

Front cover of the Guide to the Prevention and Restoration of Early Joint Deterioration in Concrete Pavements

After a few years' absence, the CP Tech Center has rehired Jeremy McIntyre. Jeremy will be a technician working under Bob Steffes in the on-campus concrete lab. Welcome back, Jeremy!