Title: Overview of the SPS-2 National Experiment
1Overview of the SPS-2 National Experiment
- Tuesday July 16, 2013
- Abilene, KS
- Jack Springer, P.E.
- FHWA Highway Research Engineer
2Presentation Overview
- Quick Introduction to LTPP
- Review of SPS-2 Experiment
- Purpose
- National SPS-2 Experimental Design
- Lay of the Land Today
3LTPP 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.
4LTPPs GOAL is
to provide answers to
pavements perform as they do!
5LTPP 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,
material properties 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 SHRPs objectives and to meet the future
needs of the highway industry.
6LTPPs CORE FUNCTIONS
- Data Collection and Management
- Data Analysis
- Product Development
7Test Sections
8(No Transcript)
9LTPP on the Web
Connect to LTPP website through
http//www.fhwa.dot.gov/research/tfhrc/programs/in
frastructure/pavements/ltpp/
10SPS-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)
11SPS-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
12National SPS-2 Experimental Design
13National SPS-2 Experimental Design
- Primary Site Factors
- Temperature Freeze and No-Freeze
- Precipitation Wet and Dry
- Subgrade Fine Grained and Course Grained
14National SPS-2 Experimental Design
Subgrade Climatic Condition Climatic Condition Climatic Condition Climatic Condition
Subgrade Wet Wet Dry Dry
Subgrade Freeze No-Freeze Freeze No-Freeze
Fine Ohio, Kansas (J) North Carolina (N) (R) (V)
Fine Michigan, Iowa (K) Arkansas (O) North Dakota (S) (W)
Coarse Delaware (L) (P) Nevada,Washington (T) California (X)
Coarse Wisconsin (M) (Q) Colorado (U) Arizona (Y)
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15Lay of the Land Today
16Lay of the Land Today
- 13 of 14 Projects are Active
- Kansas SPS-2 first one constructed
- 84 (174/206) Section are Active
- SPS-2 Pavement Preservation Pooled Fund
http//www.pooledfund.org/Details/Solicitation/133
6.
17Thank You ! Any Questions?