Effect of modulus of elasticity on creep prediction of high strength concrete containing pozzolans

N. Suksawang, H. H. Nassif

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

Abstract

The use of pozzolanic material, such as fly ash and silica fume, is becoming more popular in producing high performance/high strength concrete (HP/HSC) for various structural applications. Many studies have addressed the mechanical properties as well as durability of HP/HSC, however, the effect of pozzolans on the shrinkage and creep behaviors are not clearly addressed. There is a need to understand and identify how changes in the composition and porosity of HP/HSC, and consequently the elastic modulus, would affect its early age as well its long term performance. The main objective of this paper is to examine the effect of using various models for modulus of elasticity on the prediction of creep of high strength concrete (HSC) containing pozzolans. The study included an experimental program and a comparison of available analytical models for predicting the compressive creep and modulus of elasticity of HSC. Results from creep tests performed on different mixes (with compressive strength up to 90 MPa) were compared with those from prediction models available in the literature. Three creep models, ACI 209, CEB 90, and GL 2000, were used. In addition, various values of modulus of elasticity obtained from experimental calculation, ACI 318, ACI 363, CEB 90, Gardner, and from an equation proposed by the authors were evaluated. Results show that the modulus of elasticity has high impact on the accuracy of predicted creep and that available modulus of elasticity models needs to be revised to reflect HSC containing pozzolans.

Original languageAmerican English
Title of host publicationShrinkage and Creep of Concrete
EditorsN.J. Gardner, Jason Weiss
PublisherAmerican Concrete Institute
Pages261-284
Number of pages24
ISBN (Electronic)9780870311789
StatePublished - Mar 1 2005
Event2005 Shrinkage and Creep of Concrete Symposium at the 2005 ACI Spring Convention - New York, United States
Duration: Apr 17 2005Apr 20 2005

Publication series

NameAmerican Concrete Institute, ACI Special Publication
VolumeSP-227

Conference

Conference2005 Shrinkage and Creep of Concrete Symposium at the 2005 ACI Spring Convention
Country/TerritoryUnited States
CityNew York
Period4/17/054/20/05

ASJC Scopus subject areas

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

Keywords

  • Creep
  • Fly ash
  • High strength concrete
  • Mathematical models
  • Pozzolans
  • Prediction
  • Silica fume
  • Trinary blended concrete

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