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| FHWA > Engineering > Pavements > Concrete > CPTP Status Report |
CPTP Status Report - Task 65 Engineering ETG Review CopyAppendix B - CPTP Project DetailsTask 9 (00) - Influence of Sealing Transverse Contraction Joints on the Performance of Concrete PavementsContracting Dates: March 2003 to March 2006 Project Goals/Objectives: The goals of this project are to 1) evaluate the effect on long-term performance of unsealed transverse joints in concrete pavements with different pavement cross-sections and slab dimensions, traffic levels, and climatic conditions, 2) evaluate the effect of different transverse joint sealant materials and configurations on the long-term performance of concrete pavement in various climatic regions, and 3), determine the cost-effectiveness of sealing transverse contraction joints for different pavement designs and materials over a range of climatic zones and traffic levels. Background: Currently, 96 percent of the state highway agencies require transverse joint sealing, adding about 2 to 7 percent to the initial construction cost of their pavements and even more when considering resealing activities and life-cycle cost analysis. If the use of narrow, unsealed joints on short jointed concrete pavements can provide equally long-term pavement performance as sealed joints, states can save millions of dollars in construction and maintenance costs by eliminating joint sealing on those projects. Reduction in traffic delays during sealant maintenance and increases in worker safety are possible benefits from the elimination of sealants where they are not found cost-effective. Status: The contract for this project was awarded in March 2003. In the first quarter, a report was produced: Review of Literature on Concrete Pavement Joint Sealing Practices, Performance, and Cost-Effectiveness which covered 51 references. The references mostly cover joint sealing in concrete pavements at original construction, although there is some mention of resealing. Work was planned for the quarter recently completed, on subtask 2, to survey opinions and experiences. As the subtask 1 literature review yielded little detail on the cost specifics, and since these costs would be out of date anyway, a particular effort in subtask 2 was planned to obtain joint sealing cost data from contractors and material and equipment suppliers. Work is currently being conducted on a field data collection plan, with a preliminary field testing program being conducted in Phoenix in February 2004 and the bulk of the field work being conducted in early summer 2004. Available Reports/Articles/Presentations: FHWA RFP Objectives, Scope of Work and Proposed Work Plan; Contractor's Work Plan Other Related Reports/Articles/Presentations/Studies: LTPP Data Analysis: Relative Performance of Jointed Plain Concrete Pavement with Sealed and Unsealed Joints. Prepared by Kathleen T. Hall and James A. Crovetti, December 2000. Task 10 (00) - Revision of ISLAB 2000 for Subbase/Pavement InteractionContracting Dates: June 2000 to September 2001 Project Goals/Objectives: Revise the ISLAB 2000 analysis program to account for interaction between the concrete slab and the underlying layer. Background: One of the main drawbacks of many finite element programs is their ability to adequately model the interface condition between the PCC slab and the underlying layer. The existing finite element programs for pavement analysis assume either zero or full bond (no slippage) for the interface condition. In reality, the amount of layer slippage under a heavy wheel load is somewhere between these two extremes. Having a capability to model and specify the varying levels of slippage between the slab and an underlying layer would greatly improve our ability to fine tune concrete pavement design. Status: An appropriate mathematical model has been identified, involving a 40 degree-of-freedom stiffness element to address layer interaction. The ISLAB-2000 computer code has been modified to include the layer interface model. The ISLAB-2000 graphical user interface (GUI) has been modified to allow the user to enter new structural model parameters (friction parameters, horizontal joint stiffness, horizontal restraint). The Users Guide and installation CD were delivered to IPRF on Aug. 14, 2002. The project has been invoiced to the extent of budget by contractor. Work on this project was suspended in June 2002 per direction of IPRF. No further activity or deliverable is expected. Available Reports/Articles/Presentations: IPRF RFP Objectives, Scope of Work and Proposed Work Plan; Contractor's Work Plan Task 11 (00) - Workshops on Concrete Pavement Technology for State DOT Pavement EngineersContracting Dates:
Duration: Annual State DOT Workshops for 4 years. Professor's Seminar in 2001 Project Goals/Objectives: Conduct two-day workshops on current concrete pavement technology for state DOT engineers. Background: Improvements to the design, construction, rehabilitation, and asset management of concrete pavements will only be made when technological advances are put into use. State Departments of Transportation are the primary agents for such advancement as they are responsible for building and maintaining the large majority of highways in the U.S. Therefore, it is essential for key state DOT engineers to become familiar with new concrete pavement technology. One effective method for transferring technology is through workshops. Workshops are effective when leading authorities present new technology, followed by ample time for participants to share experiences and viewpoints. However, this format is only effective in changing DOT practices when key state DOT staff members are participants. It is important that the right representatives from the state DOTs, as well as pavement experts from the FHWA Regional Resource Centers, participate. Additionally, college professors of civil engineering can educate students on new technology. University professors, who teach pavement technology, are invited for updates on the latest advances in concrete pavements, including products and findings from the Concrete Pavement Technology Program. Status: The first state DOT workshop, entitled "Concrete Pavement Design - 2000 and Beyond" was held August 10-11, 2000, in Breckenridge, Colorado. Many positive comments were received from participants regarding the workshop's format, discussion topics, and quality of presentations. The second state DOT workshop was held in San Francisco, CA on June 28-29, 2001. The 2001 Professor's Workshop took place on June 18-20, 2001 in Skokie, IL. No further activity is anticipated. The ACPA has been conducting Professor Workshops annually since 2002. Available Reports/Articles/Presentations: IPRF RFP Objectives, Scope of Work and Proposed Work Plan; Contractor's Work Plan Conference presentations CDs are available. Task 12 (00) - Develop a Plan to Investigate the Impacts of Pavement Cracking on Long-Term PerformanceContracting Dates: October 2000 to November 2000 Project Goals/Objectives: Conduct a thorough literature search and compile a summary report of the impacts of pavement cracking on long-term concrete pavement. Prepare a research plan to address the impacts of pavement cracking on long-term performance. Background: Uncontrolled cracking in concrete pavements can be the result of many factors. While such cracking is undesirable, the long-term effects on pavement performance and durability are not clear. Key questions include: What type of cracks affect pavement performance and durability? How does cracking affect performance of pavements built on different bases? How many cracks can be tolerated without significantly affecting ride quality? When is crack repair or slab replacement needed? Status: The feasibility studies were completed and both concluded that enough information was available to determine the potential for success of a study of the impact of cracking on pavement performance. This task is now complete. Available Reports/Articles/Presentations: IPRF RFP Objectives, Scope of Work and Proposed Work Plan; Contractor's Work Plan. Task 13 (00) - Determine Actual Pavement Life Cycle CostsContracting Dates: August 2000 to January 2002 Project Goals/Objectives: Conduct comprehensive life cycle cost analyses for three specific highway sections, and prepare and distribute reports disclosing the results. Background: Many state DOTs have developed life cycle cost analysis models, and frequently conduct such analyses as part of a pavement type selection process. The FHWA has provided some additional guidance on the use and application of life cycle costing, particularly in the area of probabilistic modeling procedures. Unfortunately, very rarely do agencies ever determine actual life cycle cost data from existing projects to assess the reasonableness of their approach or assumptions. Status: This was a 100% industry funded project. Life cycle cost studies were completed in Tennessee, Utah, and Oklahoma. Individual reports/flyers have been produced for distribution by ACPA. Available Reports/Articles/Presentations: A Comparison of Pavement Performance and Costs, Interstate 40, Tennessee. ACPA Special Report SR991P. 2000. Other Related Reports/Articles/Presentations/Studies: A Comparison of Pavement Performance and Costs, Interstate 985 and State Rout 400, Georgia. ACPA Special Report SR994P. 2003. Task 14 (00) - AURORA 2000 Pavement System Analysis ToolContracting Dates: October 1997 to June 2002 Project Goals/Objectives: Develop a set of system analysis tools for pavements Background: The work was initiated in 1997 to develop a state-of-the-art, mechanistic pavement design selection and evaluation system. During the course of the work, it has evolved into a system of tools which address planning, design, construction, and economics and packages these tools in a common, user-friendly Windows interface Status: As the result of a technical review by the project panel, the final deliverables were submitted on September 29, 2000. Software was demonstrated to federal and state DOT and industry representatives at San Francisco Technology Transfer Workshop on June 28-29, 2001. Project is complete. Contract to perform independent evaluation of Aurora 2000 has been awarded (during Fall 2003) to Quality Engineering Solution. Completion of the independent evaluation is expected in January 2004. Available Reports/Articles/Presentations: No reports or other products are available for public release. Task 15 (01) - Long-Term Plan for Concrete Pavement Research and TechnologyContracting Dates: Contract Amount: Contractor: Iowa State University Project Goals/Objectives: Develop a Long-Term Plan and to develop an Action Plan to implement the Long-Term Plan Background: Task 15 was originally conceived and initiated to address the need for focus and direction in Concrete Pavement Technology Program activities beyond the current work and resources. The Long-Term Plan being developed through this endeavor will chart a path from the current state-of-the-practice to a new generation of concrete pavements. It is intended to guide concrete pavement research, development and technology activities both within and outside of the Concrete Pavement Technology Program, and FHWA's post-TEA-21 Infrastructure Technology Program. Status: Work on this project resumed (under a new cooperative agreement) in March 2003. The contractor's updated work plan was discussed at a meeting with the project technical panel in early July, and has been revised based on their input. The most significant change recommended by the panel is the addition of a by-invitation "summit" to the planned outreach effort. The project team is striving to complete the plan well in advance of the contract end date, such that the scheduled delivery date for the project deliverables is January 2004. An in-depth discussion of this project is planned for the October 6-7 meeting. Available Reports/Articles/Presentations: IPRF RFP Objectives, Scope of Work and Proposed Work Plan; Contractor's Work Plan 4th Outreach Info
Concrete Pavement Technology Long Term Research and Technology Plan - FHWA, ACPA, and AASHTO - Official "Flag" version 1.1. Task 16 (01) - Smoothness Criteria for Concrete PavementsContracting Dates: Start Date April 2003 - 30 month duration project Project Goals/Objectives: To determine what profile characteristics are objectionable, how to measure them, what causes them, and how to avoid creating them; specifically to:
Background: Research has shown that concrete pavements built smooth initially stay smooth longer than pavements built rough initially. To provide smoother pavements, many agencies utilize incentive and disincentive provisions in their construction contracts. These provisions provide a financial incentive to contractors who exceed the require pavement smoothness while penalizing contractors who build a pavement rougher than specified. Forty-five of 52 State Highway Agencies (SHAs) utilize specifications for pavement smoothness for construction acceptance for concrete pavement. Of the SHA's using smoothness specifications for concrete pavements most currently use a profilograph or other response-type roughness meter. However, there is growing trend to change the measurement device to inertial profiler and to more advanced roughness indices (International Roughness Index, IRI). AASHTO is currently considering adoption of a Provisional Standard for Pavement Smoothness based upon inertial profilers and IRI. While there is substantial experience with inertial profilers and IRI for pavement management, the use of inertial profilers and IRI as a construction quality control and quality assurance device is relatively new. There are aspects of using inertial profilers and IRI for quality control and acceptance of concrete pavement that require a more thorough understanding before improved pavement smoothness specifications can be implemented on a widespread basis. Status: Work in progress. The initial meeting of the Technical Advisory Panel was held in June 2003. Available Reports/Articles/Presentations: FHWA RFP Objectives, Scope of Work and Proposed Work Plan; Contractor's Work Plan Other Related Reports/Articles/Presentations/Studies: CD-ROM Proceedings, Fourth Annual Pavement/Materials and Testing Workshop, FHWA Office of Pavement Technology and Office of Infrastructure Research and Development, Pavement Smoothness, Friction, Tire/Pavement Noise, and Texturing, Arlington, VA, December 9-11, 2003. Task 51 (99) - Mobile Concrete LaboratoryContracting Dates: Start date October 1, 2002 - 3-year contract plus 2 option years Project Goals/Objectives: Introduce Federal, State, and local transportation personnel to state-of-the-art concrete technology for materials selection and mixture design, as well as for field and laboratory testing. Background: Transferring new technology to highway construction agencies and contractors is often a slow process. The Mobile Concrete Laboratory (MCL), initiated by FHWA, attempts to shorten the acceptance time for new technologies and research through further refinement of these technologies. In many cases, the technologies are validated in the field on actual projects, results are documented, and recommendations are made to the participating agency and the researcher. New technologies are also introduced to state highway agencies (SHA's) and industry through demonstrations at the job site, equipment exhibitions at events attended by decision makers, teaching personnel how the new technology can be used, and publishing articles on the results of the MCL activities. Status: During FY 2003, MCL has provided services to the LTPP program to evaluate the use of the impact-echo technique on existing concrete pavements to measure thickness in lieu of taking destructive cores. MCL has eight ongoing equipment loans to highway agencies evaluating these new technologies. The laboratory was on display at the Concrete Paving Conference in Austin, TX. The MCL staff also arranged and made technical presentations at an Admixture Workshop for New Jersey DOT, a High-Volume Fly Ash Workshop for Colorado DOT, and a Mixture Design Workshop at the Fourth Annual Pennsylvania Concrete Seminar. Technical presentations were made at the Texas Concrete Pavement Workshop; the Self-Consolidating Conference in Chicago, IL; the ACPA First Annual Concrete Pavement Conference in Albany, NY; and the SCAN Conference in Raleigh, NC. At this time, MCL is committed to FY 2003 projects in Florida and continued work in Pennsylvania. Requests have been received for MCL participation in field projects in California, Indiana, Iowa, Utah and North Carolina. Available Reports/Articles/Presentations: FHWA RFP Objectives, Scope of Work and Proposed Work Plan; Contractor's Work Plan Task 52 (98) - Quality Concrete Rehabilitation and Preservation (SP-205)Contracting Dates: Started in 1997 - Ongoing Project Goals/Objectives: Special Project 205 will develop guidance on concrete pavement rehabilitation and repair techniques as well as strategies that emphasizes the do's and don't's, and why and when for CPR and preventive maintenance of concrete pavements. The following repair techniques were covered: Full-depth repairs, Partial-depth repairs, Retrofit load transfer, Grooving and grinding, Subsealing, and Joint Resealing. Background: SP-205 will evaluate the effect of timing on the performance of maintenance and non-overlay rehabilitation strategies. Also the performance of the individual rehabilitation and maintenance strategies for Portland cement concrete pavements will be studied and documented. The last major FHWA effort on concrete pavement rehabilitation was in the mid 1980's. It is time to re-examine the performance of CPR techniques available and to evaluate the influence of new equipment and materials on cost effectiveness of the repairs and maintenance. Status: Field demonstration project were constructed in MN (Retrofit load transfer), OR (removing ruts due to studded tire wear), WI (partial depth repair), and OK (monolithic bonded overlay and dowel bar retrofit). Only the OR construction report has been received. The field reviews have been completed. The final report needs to be prepared. Available Reports/Articles/Presentations: FHWA RFP Objectives, Scope of Work and Proposed Work Plan; State DOT Work Plans Task 53 (98) - High Performance Concrete Pavements (TE-30)Contracting Dates: Start 1995 - Ongoing Project Goals/Objectives: The goals of the TE-30 Project are to construct selected highway projects to explore the applicability of innovative concrete pavement design and construction concepts and monitor the performance of those projects over at least a 5-year period. Background: Under Test and Evaluation Project 30 (TE-30), High Performance Concrete Pavement (HPCP), the FHWA is exploring the applicability of innovative portland cement concrete (PCC) pavement design and construction concepts in the United States. Suggested innovation areas for the program include increased service life, decreased construction time, reduced life-cycle costs, reduced maintenance costs, ultra-smooth ride quality pavements, use of recycled or waste products, use of innovative construction equipment or procedures, and use of innovative quality initiatives. An example project is MN/DOT's design for 60-year PCC design which incorporated use of w/cm below 0.40, requirement for graded aggregate to minimize paste volume, slag cement requirement to achieve low permeability concrete, and stainless steel clad dowels to prevent corrosion. Status: A report documenting the status of the projects constructed under the TE-30 program was produced in 2001. A new contract has been released to document new projects that have been added to the program and to update performance data on other projects. State highway agencies involved in the program continue to monitor the performance of their projects, and many have prepared construction and status reports. A contract was awarded during fall 2003 to update the status of the TE-30 projects. Available Reports/Articles/Presentations: FHWA RFP Objectives, Scope of Work and Proposed Work Plan; State DOT Work Plans General: Public Roads - Fine-Tuning Innovative Technologies by Mark Swanlund, July/August 2002. Illinois
Iowa
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Task 54 (99) - Repair and Rehabilitation of Concrete PavementsContracting Dates: February 2000 to December 2003 Project Goals/Objectives: The goal of this project is to develop systematic, user-friendly guidelines for use by state highway agencies in 1) selecting between the better approach between concrete repair and concrete rehabilitation, and 2) selecting specific materials and repair/rehabilitation techniques in order to optimize performance and service life. Background: The selection of appropriate maintenance and rehabilitation strategies for existing concrete pavements is a complex and involved process. There are a wide range of variables that must be considered in the process, including projected traffic loadings; structural and functional characteristics of the existing pavement; material types, conditions, and properties; environmental factors; and geometric constraints. Many of these factors are closely related to one another and the interactions between them are often extremely complex and difficult to isolate. Consequently, improved guidance is needed on the identification and selection of appropriate repair or rehabilitation treatments, including the selection of appropriate materials and techniques. Status: A set of four reports has been completed and the computer program for the analysis of rehabilitation strategies (SAPER) is undergoing final modifications. A contract modification was awarded to make the deliverables comply with Section 508, to coordinate full and partial depth pre-cast repairs of a CRCP in the Houston District, and to work on a European Format Project on "pavement strengthening." The European project will analyze accelerated load and field tests. Final project deliverables are anticipated by early 2004. Available Reports/Articles/Presentations: FHWA RFP Objectives, Scope of Work and Proposed Work Plan; Contractor's Work Plan Task 55 (99) - Accelerated Load Testing of Ultra-Thin WhitetoppingContracting Dates: 1998 to 2003 Project Goals/Objectives: To construct and test UTW sections at the FHWA's Accelerated Loading Facility, in order that data can be collected, to evaluate and develop design procedures. Note: an IPRF Contractor has developed an updated ACPA UTW design method, based on stationary finite element models. Background: FHWA and the American Concrete Pavement Association began a cooperative agreement in 1998. Response data was collected on eight sections of UTW, at the Accelerated Load Facility (ALF). Status: Field tests are complete. About $325,000 in contract funds operated the two ALF machines for about 18 months of ALF testing, over the period May 1998 to December 2000. The FHWA Principal Investigator is preparing a final FHWA Report on the Project. The loading of the eight UTW lanes and data collection is complete, including development of an ALF-UTW database. Assistance continues to be given to the ACPA and their contractors in data analysis. About 100 more 150 mm cores were extracted to conduct the Iowa shear test for bond between the PCC and HMAC materials, and to determine the shear strengths of the existing HMAC layers. In practically every case the bond strength was higher than the shear strength of the HMAC. Sections were removed in the spring of 2002 for construction of the next ALF experiment on modified asphalt concrete pavements. The two study objectives were to provide a database of accelerated load tests of ultra thin whitetopping, and to evaluate current mechanistic models. An Accelerated Load Facility (ALF)/ Ultra thin Whitetopping (UTW) database version 1 was produced. In addition an extensive analysis has been conducted of the separate pavement response database. The finding was that current stationary load finite element models used for UTW, fail to capture the fundamental behavior. This analysis plus a User's Manual for the ALF/UTW database will comprise the Final Report. Available Reports/Articles/Presentations: No reports or other products are available.
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