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Overview of the SPS-2 National Experiment

Overview of the SPS-2 National Experiment. Wednesday April 9, 2014 Dover, DE Jack Springer, P.E. FHWA Highway Research Engineer. Presentation Overview. Quick Introduction to LTPP Review of SPS-2 Experiment Purpose National SPS-2 Experimental Design Lay of the Land Today.

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Overview of the SPS-2 National Experiment

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  1. Overview of the SPS-2 National Experiment Wednesday April 9, 2014 Dover, DE Jack Springer, P.E. FHWA Highway Research Engineer

  2. Presentation Overview • Quick Introduction to LTPP • Review of SPS-2 Experiment • Purpose • National SPS-2 Experimental Design • Lay of the Land Today

  3. LTPP Mission Statement To increase pavement life by investigation of various designs of pavement structures and rehabilitated pavement structures, using different materials and under different loads, environments, subgrade soil, and maintenance practices.

  4. LTPP’s GOAL is… HOW and WHY to provide answers to pavements perform as they do!

  5. LTPP Objectives • Evaluate existing design methods. • Develop improved design methodologies and strategies for the rehabilitation of existing pavements. • Develop improved design equations for new and reconstructed pavements. • Determine the effects of loading, environment, materialproperties and variability, construction quality, and maintenance levels on pavement distress and performance. • Determine the effects of specific design features on pavement performance. • Establish a national long-term database to support SHRP’s objectives and to meet the future needs of the highway industry.

  6. LTPP’s CORE FUNCTIONS Data Collection and Management Data Analysis Product Development

  7. Test Sections

  8. LTPP on the Web Connect to LTPP website through: http://www.fhwa.dot.gov/research/tfhrc/programs/infrastructure/pavements/ltpp/

  9. LTPP InfoPave

  10. SPS-2 Purpose • Determine the influence of concrete strength and pavement drainage on PCC pavement performance • Neither had quality experimental field data • Find impact of widened lanes • Determine impact of other design factors (slab thickness, base type)

  11. SPS-2 Purpose (cont.) • Planned products • Evaluation of existing design methods • Development of improved design equations • New and reconstructed pavements • Effects of specific design features on pavement performance • Development of a comprehensive database for pavement community

  12. National SPS-2 Experimental Design

  13. National SPS-2 Experimental Design • Primary Site Factors • Temperature: Freeze and No-Freeze • Precipitation: Wet and Dry • Subgrade: Fine Grained and Course Grained

  14. National SPS-2 Experimental Design * = Cell not filled

  15. Lay of the Land Today

  16. Lay of the Land Today • 13 of 14 Projects are Active • Delaware SPS-2 still active! • 84% (174/206) Sections are Active • SPS-2 Pavement Preservation Pooled Fund: http://www.pooledfund.org/Details/Solicitation/1336.

  17. Thank You ! Any Questions?

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