Measurement and modeling of concrete tensile creep and shrinkage at early age

M. D. D'Ambrosia, D. A. Lange, Z. C. Grasley

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Synopsis: Volumetric instability of concrete is a primary cause for early age cracking of concrete pavements and structures. Creep and shrinkage of concrete were studied under restrained conditions and under constant applied load during the first week after casting. Early age behavior was characterized by a uniaxial test that measures shrinkage strain and restrained shrinkage stress. The extent of stress relaxation by tensile creep is determined using simple superposition analysis. The experimental measurements are compared with some current creep and shrinkage models to assess their validity for early age prediction. The B3 model has been previously modified to accommodate early age creep, and this modification was employed in the current study. Test results for normal concrete mixes with different w/c are discussed and compared to model predictions. Comparisons show that the B3 model is accurate when the early age modifications are employed.

Original languageEnglish (US)
Title of host publicationAutogenous Deformation of Concrete
EditorsOle Mejlhede Jensen, Dale P. Bentz, Pietro Lura
PublisherAmerican Concrete Institute
Pages99-112
Number of pages14
ISBN (Electronic)9780870311437
StatePublished - Mar 1 2004
Event2002 Autogenous Deformation of Concrete - Phoenix, United States
Duration: Oct 27 2002Nov 1 2002

Publication series

NameAmerican Concrete Institute, ACI Special Publication
VolumeSP-220
ISSN (Print)0193-2527

Conference

Conference2002 Autogenous Deformation of Concrete
Country/TerritoryUnited States
CityPhoenix
Period10/27/0211/1/02

Keywords

  • Creep
  • Early age
  • Modeling
  • Restrained drying
  • Shrinkage

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science

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