Determination of coefficient of thermal expansion effects on Louisiana’s PCC pavement design.

Details

• Creators:
  Shin, Hak-Chul ; Chung, Yoonseok
• Corporate Creators:
  Louisiana State University (Baton Rouge, La.). Department of Civil and Environmental Engineering
• Corporate Contributors:
  Louisiana. Dept. of Transportation and Development ; Louisiana Transportation Research Center ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Expansion
  • Thermal expansion
  • Expansion joints
  • Pavement design
  • Thermal expansion
  • Portland cement
  • Cement additives
  • Testing
  • Portland cement concrete
  • Additives
  More +
• Publication/ Report Number:
  FHWA/LA.11/451
• Resource Type:
  Tech Report
• Geographical Coverage:
  Louisiana
• Edition:
  Final report; Feb. 1, 2007-Apr. 31, 2009.
• Corporate Publisher:
  Louisiana Transportation Research Center
• Abstract:
  With the development of the Mechanistic Empirical Pavement Design Guide (MEPDG) as a new pavement design tool, the ; coefficient of thermal expansion (CTE) is now considered a more important design parameter in estimating pavement ; performance including cracking, faulting, and international roughness index (IRI). This study was conducted to measure ; typical CTE values of Portland cement concrete (PCC) pavements having various aggregates used in Louisiana and to ; investigate the relationship between CTE and other critical variables such as aggregate types, age of concrete, dimension of ; specimen, amount of course aggregate in mixture, relative humidity, and concrete mechanical properties. AASHTO TP 60-00 ; was used for measuring concrete CTE and a recently new standard test method, AASHTO T 336-09, was adopted to replace ; the TP 60-00. A calibration factor was developed to convert the CTE values measured by AASHTO TP 60-00 to that of the ; new standard testing method. From the analysis of measured data, it was found that aggregate types, coarse aggregate ; proportion, and relative humidity have a significant influence on CTE. This finding was confirmed with a statistical analysis of ; variance (ANOVA). CTE tests and mechanical property tests were also performed at different ages to provide input data for ; Level 1 design of MEPDG. Based on the results of the MEPDG analysis, current maximum joint spacing 20 ft. (6.1 m) in ; jointed plain concrete pavement (JPCP) can be adjusted to 15 or 18 ft. (4.6 or 5.5 m) when Kentucky limestone is used as a ; coarse aggregate.
  More +
• Format:
  PDF
• Funding:
  07-2C / 736-99-1450
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/23571/dot_23571_DS1.pdf
• File Type:
  [PDF - 2.44 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:623489edf0ad98ba531e5e7e673db0d2559469b1998bd70f088ee3f08ba06745591b26be25a52955e16dc0b38144aaa60899a38a809cd0a734c7105dd4b620ad