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Material and Construction Optimization for Prevention of Premature Pavement Distress in PCC Pavements

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Material and Construction Optimization for Prevention of Premature Pavement Distress in PCC Pavements

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    1. Material and Construction Optimization for Prevention of Premature Pavement Distress in PCC Pavements Technical Advisory Group Meeting April 9, 2003 Center for Portland Cement Concrete Pavement Technology Iowa State University

    3. Concrete mixtures: complex chemical and physical systems Variety of ingredients & sources Proportioning and mixing procedures Construction procedures Construction Practices are not always Integrated with Material Practices ! The Issue

    5. Project Objectives Bring together material science and construction practices Best Practice Manual to simplify and specify how to produce affordable, durable, reliable concrete pavements consistently Develop new quick battery of tests to measure performance Incorporate computer software systems to predict performance. Five training modules to communicate best practices and research results

    6. Managing Performance

    7. Managing Performance

    9. Understanding Performance

    10. Understanding Performance Previous Research Current Practice Performance Problems- Past and Current Suite of Tests Demonstration Projects

    11. Stages Mix Design Stage Characterize the materials Characterize the concrete Materials are similar but not the same as project materials Go/ No Go

    12. Stages Pre-Construction Verification Project materials Verify mix design Field lab tests

    13. Stages Quality control Monitor the concrete Predict performance HIPERPAV

    17. ISU - Mix Optimization Project Proposed research Lab Study Set baseline for field work (ideal conditions and batch precision) Evaluate new mix control technology Develop a strategy for mixture optimization

    18. ISU - Mix Optimization Project Proposed research Field Study Evaluate homogeneity Evaluate workability (just after mixing and then just before paver) Set baseline for uniformity of concrete produced in the field

    20. FHWA Task 64

    22. HIPERPAV Prediction Tool to Help Achieve Construction Optimization Predicts Controlling Cracking of Pavements Predict Optimum Sawing Window Predict Impact of Adverse Weather on Construction of Pavement

    25. Training Modules Targeted Preliminary Guidelines for Prevention of Premature Pavement Distress Compatibility Identification Training Modification Material Property Integration Best Construction Practices Material and Construction Effects on Pavement Performance

    27. Summary of Proposed Funding Sources: $1,200,000 16 Pooled fund participants ($15,000/yr. x 16 x 5yrs.) $ 314,000 Iowa DOT and PCC Center ($160,000 IHRB + $154,000 PCC Center) $ 200,000 Industry (ACPA / State Paving Assoc. & Others) $ 500,000 PCC Center Federal Appropriation $2,214,000 Total

    28. Proposed Schedule Phase I - 18 months Phase II – 24 months Phase III – 18 months Total: 60 months

    29. Questions ??

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