The pore structure and autogenous shrinkage of high-performance concrete with ternary binders

Y. Akkaya, M. Konsta-Gdoutos, S. P. Shah

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

1 Scopus citations

Abstract

Most modem high performance concretes contain supplementary cementitious materials such as silica fume, slag or fly ash. However, highly reactive silica fume adversely affects the autogenous shrinkage properties and increases the risk of cracking at early ages. In order to compensate for the adverse effects of silica fume, ultrafine fly ash was also incorporated into the binder phase of the concrete. Part of cement and part of silica fume were replaced by ultrafine fly ash and early age properties of the mixtures with these ternary binders were compared. Strength gain was followed by compression testing and, autogenous shrinkage properties were measured under free conditions. It is seen that ternary binders can decrease the autogenous shrinkage strains, while keeping the early strength gain at a comparable level. Results of the thermogravimetric analysis showed that mixtures with ternary binders had a similar hydration rate compared to the mixture with silica fume only. Mercury intrusion porosimetry proved that the amount of finer pore volume, one of the major reasons of autogenous shrinkage, was decreased with the incorporation of ultrafine fly ash.

Original languageEnglish (US)
Title of host publication8th CANMET/ACI International Conference on Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete
EditorsV.Mohan Malhotra
PublisherAmerican Concrete Institute
Pages233-248
Number of pages16
ISBN (Electronic)9780870311468
StatePublished - May 1 2004
Event2004 8th CANMET/ACI International Conference on Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete - Las Vegas, United States
Duration: May 23 2004May 29 2004

Publication series

NameAmerican Concrete Institute, ACI Special Publication
VolumeSP-221
ISSN (Print)0193-2527

Conference

Conference2004 8th CANMET/ACI International Conference on Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete
Country/TerritoryUnited States
CityLas Vegas
Period5/23/045/29/04

Keywords

  • Autogenous shrinkage
  • Critical pore radius
  • Early age concrete
  • Pore structure

ASJC Scopus subject areas

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

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