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Title: Methodology for Identifying Zero-Stress Time for Jointed Plain Concrete Pavements
Accession Number: 01518132
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: This study focused on identifying the zero-stress time (TZ) in jointed plain concrete pavements (JPCPs). TZ is the time when the concrete slab is sufficiently strong to deform (thermally expand or contract and thus curl) despite the existing external restraints, including the friction at the base–slab interface. It is critical to be able to identify TZ so that the temperature gradient present in the slab at TZ, known as the built-in temperature gradient, can be characterized. In this study, TZ was established through the instrumentation of 36 concrete slabs in four JPCP construction projects. Strain–temperature behavior in each slab was used to identify TZ. The slabs in each project were paved at different times of the day (morning, noon, early afternoon, and late afternoon) to investigate the effects of the ambient curing conditions on TZ. The degree of hydration at TZ (αTZ) was established for each slab. The field data were used in the development of a model for predicting αTZ as a function of the concrete water-to-cement ratio, unit weight, early-age elastic modulus, and slab thickness.
Monograph Title: Monograph Accession #: 01547891
Report/Paper Numbers: 14-3599
Language: English
Authors: Nassiri, SomayehVandenbossche, Julie MJanssen, Donald JPagination: pp 62–71
Publication Date: 2014
ISBN: 9780309295307
Media Type: Print
Features: Figures
(6)
; Photos; References
(27)
; Tables
(5)
TRT Terms: Uncontrolled Terms: Subject Areas: Construction; Highways; Materials; Pavements; I52: Construction of Pavements and Surfacings
Files: TRIS, TRB, ATRI
Created Date: Jan 27 2014 3:14PM
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