2005-6 Work Plan Discussion

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2005-6 Work Plan Discussion July 14, 2005
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Opportunities in 2005/6

• Extension of Current Technical Thrusts
• Subgrade Stabilization -- Tutumluer/Thompson
• Raw Materials -- Struble
• PCC Pavement -- Roesler/Lange
• New Directions
• Pavement Icing Hazards -- Dempsey
• Asphalt overlays -- Buttlar/Al-Qadi
• Plantings, Wildlife and Safety --
  Herricks/Branham

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OMP Continuing Project for 2005-06

• Subgrade Soil Support and Stabilization
• Co-PIs Erol Tutumluer Marshall R. Thompson
• RA H.S. Brar
• Additional soil-lime testing will be conducted in
  the laboratory for soil samples with different
  lime percentages and lime sources
• Cooperate with OMP in the development of
  construction monitoring guidelines for 9L-27R
  subgrade soil lime modification stabilization

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OMP Continuing Project for 2005-06

• Subgrade Soil Support and Stabilization
• (Continued)
• Develop and recommend to OMP a program to
  evaluate the completed lime stabilization
  construction as related to the k-150
  requirement (U of I will cooperate with OMP in
  implementing the program)
• Continue to work with OMP on current and future
  subgrade soil support and stabilization issues
  for OMP runways/taxiways

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Proposed CEAT Materials Research for 2005-6 --
Leslie Struble

• Study impact of potassium acetate deicing
  chemicals on ASR (proposal submitted)
• Measure effectiveness of ASR mitigating
  admixtures

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PCC Pavements -- Roesler/Lange

• Continue toward current goals
• Concrete mix design, volume change, aggregate
  size, slab load transfer
• Saw cut timing
• Extend effort toward field instrumentation
• Validate material and pavement models
• Use of recycled concrete
• Internal curing

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Pavement Icing HazardsBarry Dempsey

• Adapt the Enhanced Integrated Climatic Model
  (EICM) to real time pavement temperature
  monitoring for icing and other winter hazard
  conditions.
• Basic Issues Icing conditions are not only a
  function of the air temperature but the
  temperature history in the pavement leading up to
  the possible icing condition. Pavement
  temperatures and air temperatures can be quite
  different based on the climate and pavement
  temperature history.The EICM is used extensively
  in the new AASHTO Design procedure and has been
  found to work very well in that application.

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Pavement Icing Hazards

• The EICM operates on hourly climatic data and
  predicts pavement temperatures with a high level
  of accuracy. The model has evolved over
  Dempseys 30 plus years of research and is quite
  sophisticated. It operates on local climatic
  data input. Through real time use of this model
  maintenance can monitor real time temperatures in
  the pavement so as to project the probability
  levels for icing or slippery surface conditions.
  
• Goal Better scheduling for anti icing chemical
  applications and more economical control of
  application rates

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Asphalt Overlays Reflective Cracking Causes and
Prevention
William G. Buttlar, Ph.D., P.E. Imad Al-Qadi,
Ph.D., P.E. University of Illinois at
Urbana-Champaign
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1) Reflective Cracking in Airport Overlays
2) Mechanism of Reflective Cracking

• - Do we need any modification in the current
  design?
• - Is there any way to reduce the maintenance cost
• or to delay reflective cracking?
• What analysis tools are needed?

Environmental and Load Related Factors
Field Performance
3) Key Factors
4) Tools

• Asphalt Overlay and interlayer properties
• Load transfer between the underlying concrete
  slabs
• Subgrade support
• Structural condition of the underlying slabs
• Fracture mechanisms (crack initiation and
  propagation)
• Bonding condition between slabs and underlying
  layer

LAB Testing
Computer Modeling
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Cutting-Edge Testing and Analysis Tools
Laboratory Tests
FE Modeling
Multi-scale Modeling
Image Processing
Material Properties
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Related Studies Tech Transfer

• FAA Overlay Study (2002-2005)
• NSF GOALI Study (2002-2006)
• FHWA Pooled Fund Thermal Cracking Study
  (2004-2006)
• IDOT Reflective Cracking Study (2005-2008)

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Analysis of Suitability of Soils at OHare to
Support Turfgrass Growth

• Dr. Bruce Branham
• Department of Natural Resources Environmental
  Sciences, UIUC

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GPR Applications in Pavements

• Quality control for new construction
• Diagnostic tool for existing structures
• Detect flaws
• Detect moisture
• Measure concrete slab and base thicknesses
• Detect rebar locations and estimate cover depth

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Reinforcement and Layer Interface Detection Using
GPR
CRCP (ground-coupled)