Evaluation of structural responses of continuously reinforced concrete pavement (CRCP) using falling weight deflectometer

Pangil Choi, Dong Ho Kim, Bong Hak Lee, Moon C. Won

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The objective of this study is to suggest reasonable structural evaluation method of continuously reinforced concrete pavement (CRCP) using falling weight deflectometer (FWD). The effects of transverse crack spacing and temperature conditions were investigated in CRCP sections with various slab thicknesses and pavement ages. A total of 20 CRCP sections were selected throughout Texas and structural responses were evaluated from 2006 to 2013 for 8 testing years. Test results show that transverse crack spacing has little effect on deflection and load transfer efficiency (LTE). The LTE values were maintained at above 90%, regardless of crack spacing, temperature condition or pavement age. Temperature variations had small effects on deflections at cracks and the mid-slab, but almost no effects on LTE. Maximum deflections and back-calculated k-values appear to be better indicators of structural condition of CRCP than LTE. Load transfer efficiency is not the best indicator of structural condition of transverse cracks in CRCP. Deficiencies in slab support are the primary cause of full-depth distresses in Texas, and back-calculated k-values, which combine both a maximum deflection and the shape of deflection bowl from FWD testing, may be a better indicator of the structural condition of CRCP.

Original languageEnglish
Pages (from-to)28-39
Number of pages12
JournalCanadian Journal of Civil Engineering
Volume43
Issue number1
DOIs
StatePublished - Oct 8 2015

Keywords

  • Continuously reinforced concrete pavement
  • Falling weight deflectometer
  • Load transfer efficiency
  • Modulus of subgrade reaction
  • Structural responses
  • Transverse crack

Fingerprint

Dive into the research topics of 'Evaluation of structural responses of continuously reinforced concrete pavement (CRCP) using falling weight deflectometer'. Together they form a unique fingerprint.

Cite this