Validation of correction factors for concrete coefficient of thermal expansion.
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2010-07-01
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Alternative Title:LTRC research project capsule : technology transfer program : 10-2C.
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Abstract:To complete the objectives, AASHTO T 366-09 results will be compared to ASHTO TP 60-00 results. The results will then be used as input values for the MEPDG and the results evaluated.
Major changes between AASHTO TP 60-00 and AASHTO T 336-09 will be reviewed and the implication of the changes will be investigated. Since the commercial automated divide (HM-251) is used to measure CTE value, the software that controls the testing procedure should be upgraded to account for the difference in CTE values for the calibration specimen.
After the software is upgraded, the correct CTE of the specimen used for the LTRC project 07-02C will be measured based on AASHTO T 336-09. By comparing the CTE value measured by AASHTO TP 60-00 and AASHTO T 336-09, the correction factors will be calculated to produce correct CTE values for duplicated specimen without further measurement.
This project will greatly assist the Department in implementation of the Mechanistic-Empirical Pavement Design Guide. The updated CTE values will allow LADOTD design engineers to better predict long term portland cement concrete pavement performance.
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