In association with the CP Road Map Program
The National Concrete Consortium E-News (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 December 2018 E-News, please click on image at left, or go to: http://www.cproadmap.org/publications/e-news_Dec2018.cfm#pubs-2
Moving Advancements into Practice (MAP) Brief: The December 2018 MAP Brief, “Performance Experience and Lessons Learned from SPS 2 Test Sections of the Long-Term Pavement Performance Program (LTTP)”, provides a summary of the performance and lessons learned from the SPS-2 test sections and includes highlights from the SPS-2 Tech Days. For the December MAP Brief, please click on image to the right, or go to: http://www.cproadmap.org/publications/e-news_Dec2018.cfm#pubs-2.
Recent publications from the CP Tech Center:
- Guide for Concrete Pavement Distress Assessments and Solutions 500-page Guide 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. This manual goes into the details of the different types of distress observed in the field.
To continue reading, please go to: http://www.cproadmap.org/publications/e-news_Dec2018.cfm#pubs-1
To download the PDF of the Guide, please go to: https://intrans.iastate.edu/app/uploads/2019/01/concrete_pvmt_distress_assessments_and_solutions_guide_w_cvr.pdf
For the ISCP December article titled “Now Available Online! “Guide for Concrete Pavement Distress Assessments & Solutions: Identification, Causes, Prevention, & Repair”, please go to: https://www.concretepavements.org/2018/12/31/now-available-online-guide-for-concrete-pavement-distress-assessments-solutions-identification-causes-prevention-repair/ - Three webinars on Microfibers for Concrete Pavements, Presenters Jeff Roesler, President-ISCP and University of Illinois Urbana-Champaign and Amanda Bordelon-Utah Valley University is a series of threewebinars sponsored by the CP Tech Center and funded by the TTCC pooled fund project. All of the series are available on the CP Tech Center website. The series cover the following topics:
• Fiber Reinforced Concrete Overview
• Effects of Macrofibers on Behavior & Performance of Concrete Slabs & Overlays
• Overview of Macrofiber Software & Guidelines for Concrete Overlay Design
For the webinars, please go to: https://cptechcenter.org/recorded-webinars/
NCC State Survey: Member states of the National Concrete Consortium (NCC) have the ability to poll other member states regarding specifications, materials, construction, research, or other issues related to concrete paving.
At the 2018 NCC fall meeting (September 18), Maria Masten, P.E., Concrete Materials Engineer-Minnesota Department of Transportation and Chairperson of NCC presented the NCC State Reports Fall 2018—QC/QA State Practices, Tolerances, Quality Plans, Plant Certification, E-Construction, and PEM Status. For the Presentation, please click on image to right, or go to: https://intrans.iastate.edu/app/uploads/2018/10/2018-Fall-NCC-States-Reports_rev10-20-18.pdf
News from the Road
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.
Quantifying the Effects of Preservation Treatments on Pavement Performance (report date: October 2018): TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 858 titled “Quantifying the Effects of Preservation Treatments on Pavement Performance”, presents a framework for quantifying the effects of preservation treatments on pavement performance, along with a guidance document to facilitate implementation of the framework. The proposed framework uses performance measures that quantify the changes in pavement performance in terms of condition (e.g., cracking and faulting of concrete pavements and cracking and rutting of asphalt pavements), service life, and life-cycle costs. The guide also identifies alternate pavement performance measures (e.g., friction and composite pavement condition indices) and describes a process for assessing their appropriateness for use in quantifying the effects of preservation treatments on pavement performance. To continue reading, please go to: http://www.cproadmap.org/publications/e-news_Dec2018.cfm#pubs-2. To download the report, please go to: http://www.trb.org/Main/Blurbs/178307.aspx.
Jointed Plain Concrete Pavement Design and Construction Review (report date: February 2018): An experimental research study was conducted to develop optimized concrete mixtures for jointed plain concrete (JPC) pavements and field evaluation of newly constructed JPC pavement sections along South Dakota highways. Using South Dakota aggregates, different concrete mixtures were assessed for optimum workability, durability, and cost. A new laboratory technique that involves measuring the “specific work” of fresh concrete was developed to compare workability of different mixtures. The study documents the field data obtained from newly constructed JPC pavements and what they demonstrated. To continue reading, please go to: http://www.cproadmap.org/publications/e-news_Dec2018.cfm#pubs-2. To download the document, please click on the image right, or go to: https://www.ugpti.org/resources/reports/downloads/mpc18-364.pdf.
Fiber (Steel) Reinforced Concrete for Improved Performance of Transportation Infrastructure (report date: February 2018): Steel fiber-reinforced concrete (SFRC) provides improved tensile performance of concrete. This improved performance can be used in slabs to reduce the volume of conventional steel reinforcement, create longer spans, or reduce slab thickness. Use of SFRC can lead to a reduction in structure weight and improvements in the safety and speed of construction. These benefits can result in cost savings in both the short term (construction labor) and the long term (improved quality and durability). The project consisted of four main tasks. To continue reading, please go to: http://www.cproadmap.org/publications/e-news_Dec2018.cfm#pubs-2. To access the full document, please go to: https://apps.azdot.gov/ADOTLibrary/publications/project_reports/pdf/SPR705.pdf
Reliable Early Opening Strength for Concrete Pavements and Patch Work (report date: February 2018): The requirements for opening concrete pavement repairs to traffic vary greatly around the country. States and their transportation departments specify these different requirements for various reasons, including traffic opening requirements, environmental conditions, and locally available materials, among other factors. This project reviewed the practices and requirements for early-opening-to-traffic concrete used by state DOTs. Transportation agencies have a need to specify the most efficient and effective early opening strengths and would benefit from understanding the latest thinking and practices adopted by similar agencies. Knowing the best approach to take can lead to dependable concrete, increased use of travel lanes, and a reduced cost of the materials and construction methods. To continue reading, please go to: http://www.cproadmap.org/publications/e-news_Dec2018.cfm#pubs-2.
Construction and Rehabilitation of Concrete Pavements under Traffic (report date: 2018): With advancements in materials, equipment, placement procedures, and project management techniques, the construction and rehabilitation of concrete pavements can be effectively accomplished under traffic. Many projects have been constructed under varying levels of traffic, ranging from temporary closures to the maintenance of high traffic volumes adjacent to or through the projects. However, the current state of the practice in constructing or rehabilitating concrete pavements under traffic relies primarily on a few high-profile and well-documented projects. To continue reading, please go to: http://www.cproadmap.org/publications/e-news_Dec2018.cfm#pubs-2.
Development of Durable “Green” Concrete Exposed to Deicing Chemicals via Synergistic use of Locally Available Recycled Materials and Multi-scale Modifiers (report date: February 2018): From the economic and social perspectives, the use of waste materials would not be attractive until their costs and quality can satisfy the construction requirements. In this study, a pure fly ash paste (PFAP) was developed in place of ordinary Portland cement paste (OPCP); prepared at room temperature and without direct alkali activation.; samples using only the as-received class C coal fly ash (CFA), water, and a very small amount of borax (Na2B4O7). These mechanical and other properties of the PFAP make it a viable “green” construction binder suitable for a host of structural and non-structural applications. Advanced characterization of the raw material and PFAP pastes was employed to elucidate the hydration mechanisms of this “green” binder. The obtained knowledge sheds light on the role of class C CFA in the hydration process and may benefit the expanded use of various CFAs in cementitious materials. To continue reading, please go to: http://www.cproadmap.org/publications/e-news_Dec2018.cfm#pubs-2. To download the PDF of the report, please click on image above right, go to: http://cem.uaf.edu/media/257098/cesticc-final-report-xn.pdf.
If you’d like to find out more about the CP Road Map or learn how you can get involved, contact:
Dale Harrington, HCE Services | E-mail: dharrington@hceservices.com | P: 515-964-2020
Sabrina Shields-Cook, Editor | E-mail: shieldsc@iastate.edu