The NCC E-News is the newsletter of the Long-Term Plan for Concrete Pavement Research and Technology (CP Road Map)—a national research plan developed and jointly implemented by the concrete pavement stakeholder community. For the SEPTEMBER 2019 E-News, please click on image to the right, click on the link under each individual article description below, or for the entire E-News, please go to: http://www.cproadmap.org/publications/e-news_Sept2019.cfm
CP ROAD MAP: THIS SEPTEMBER 2019
Moving Advancements into Practice (MAP) Brief:
MAP Briefs describe promising research and technologies that can be used now to enhance concrete paving practices. The September 2019 7-page MAP Brief, “Overview of the Guide for Concrete Pavement Distress Assessments and Solutions,” summarizes:
• Concrete pavement distress
• Who the guide was developed for
• Why the guide was developed
• How the guide was developed
• How to use this guide
• Organization and Scope of this Guide
• Division 1: Full-Depth Concrete Pavements Chapters and Distresses:
Chapters 1-13
• Division 2: Concrete Overlay Chapters and Distresses: Chapters 14-19
The Guide for Concrete Pavement Distress Assessments and Solutions is intended to assist with pavement preservation by helping to identify the causes and remedies for concrete pavement distress. By understanding the basic principles of concrete pavement preservation, engineers will be able manage their pavement networks to provide safe and dependable roadways while minimizing disruptions to the public for repair and maintenance activities. Establishing a proactive approach to pavement condition monitoring and planned maintenance activities will reward owner agencies with not only long life from their concrete pavements but also reduced ownership costs and minimal disruption to the traveling public. For the September 2019 MAP Brief, please click on image above right, or go to: http://www.cproadmap.org/publications/MAPbriefSept2019.pdf
CP Road MAP E-News … News from the Road
Highlights research around the country that is helping the concrete pavement community meet the research objectives outlined in the CP Road Map. The research projects and the summaries described herein are the products of the researchers and sponsors.
Durability of Latex-Modified Concrete Mixed with a Shrinkage Reducing Agent for Bridge Deck Pavement—A report from the National Research Foundation of Korea examined the feasibility of applying a shrinkage reducing agent to latex-modified concrete to reduce shrinkage cracking. Latex modified concrete (LMC) is used for a bridge deck pavement method introduced in Korea in the 2000s. Currently, it is the concrete pavement method being used for most highway bridges … to continue, please go to: http://www.cproadmap.org/publications/e-news_Sept2019.cfm#News-1
Tension Testing of Ultra-High Performance Concrete—A project led by the FHWA in partnership with the French Roads and Bridges Research Agency developed a material-scale direct-tension test for Ultra-high-performance concrete (UHPC) that can be completed on cast or extracted specimens. UHPC is a class of cementitious composite materials designed to exhibit exceptional mechanical and durability properties, including sustained post-cracking tensile strength. Laboratory tests of structural elements have clearly indicated that UHPC components can exhibit tensile mechanical properties far in excess of those expected from conventional or fiber-reinforced concretes. This study developed … to continue, please go to: http://www.cproadmap.org/publications/e-news_Sept2019.cfm#News-2
Investigation and Evaluation of Iowa Department of Transportation Bridge Deck Epoxy Injection Process—research sponsored by the Iowa Department of Transportation (Iowa DOT) developed a specification detailing the proper materials, equipment, and procedures for bridge deck epoxy injection. Since the 1970s, the Iowa DOT has used concrete overlays as a means of restoring its bridge decks and, as a result, the service life of the deck is commonly extended many years. This procedure has proven to be both effective and economically attractive. Despite that, concrete overlays cannot be considered a permanent repair as they are subject to harsh conditions, similar to the original bridge decks. As time passes, … to continue, please go to: http://www.cproadmap.org/publications/e-news_Sept2019.cfm#News-3
Impact of Environmental Factors on Pavement Performance in the Absence of Heavy Loads—A project sponsored by the FHWA aimed to identify and quantify the effects of environmental factors and pavement design on pavement performance in the absence of heavy loads. The objectives of this study were to identify and quantify the effects of environmental factors and pavement design on pavement performance in the absence of heavy loads; establish what the environmental effects are and develop recommendations for mitigating these effects through effective designs, materials selection, and construction; estimate the portion of total pavement damage caused by environmental factors; and establish a database of pavement design features, materials properties, and performance to be used in the future for similar analyses. Site-by-site analyses of the Long-Term Pavement Performance program’s … to continue, please go to: http://www.cproadmap.org/publications/e-news_Sept2019.cfm#News-4
Development of Cost-Effective Ultra-High Performance Concrete (UHPC) for Colorado’s Sustainable Infrastructure—Research sponsored by the Colorado DOT (CDOT) developed a ultra-high performance concrete (UHPC) mixture using locally available materials, with a cost analysis showing that the prototype UHPC is up to 74% less expensive than commercial products. This report presents the development of UHPC using locally available materials, which reduce construction costs when compared to commercial products. A UHPC mixture was formulated with the aim of achieving a specified compressive strength of 20 ksi. The report examines implications of various constituent types with an emphasis on silica compounds (silica fume, silica powder, silica sand, finer silica sand, pyrogenic silica, and precipitated silica), including steel and polypropylene fibers. Bond tests were conducted to evaluate … to continue, please go to: http://www.cproadmap.org/publications/e-news_Sept2019.cfm#News-5
To find out more about the CP Road Map or learn how you can get involved, please contact:
Dale Harrington, HCE Services
E-mail: dharrington@hceservices.com | P: 515-964-2020
Sabrina Shields-Cook, Editor | E-mail: shieldsc@iastate.edu
Or, visit the CP Road Map homepage for more details: http://www.cproadmap.org