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Materials and Structures

, Volume 35, Issue 2, pp 97–101 | Cite as

Efficiency of lightweight aggregates for internal curing of high strength concrete to eliminate autogenous shrinkage

  • S. Zhutovsky
  • K. Kovler
  • A. Bentur
Scientific Reports

Abstract

High Strength Concretes (HSC) with extremely low water to binder (w/b) ratios are characterized by high cracking sensitivity which is a consequence of increased autogenous shrinkage. The major reason for autogenous shrinkage—self-desiccation—cannot be eliminated by traditional curing methods. The application of the concept of internal curing by means of saturated lightweight aggregate was applied and shown to be effective in eliminating autogenous shrinkage. The present paper describes an approach to optimize the size and porosity of the light-weight aggregate to obtain effective internal curing with a minimum content of such aggregate.

Keywords

Coarse Aggregate High Strength Concrete Water Absorption Capacity Autogenous Shrinkage Lightweight Aggregate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Résumé

Les bétons de haute résistance qui ont un rapport eau/liant extrêmement bas, sont caractérisés par une haute sensibilité à la fissuration, qui est l'une des conséquences d'un retrait endogène plus important. La raison principale du retrait endogène—l'auto-dessiccation—ne peut être éliminée par les méthodes conventionnelles de cure. L'application du concept de la cure interne au moyen de granulats légers saturés a été pratiquée et s'est avérée effective pour éliminer le retrait endogène. Cet article décrit une approche visant à améliorer la taille et la porosité du granulat léger afin d'obtenir une cure interne effective avec un volume minimum d'un tel granulat.

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Copyright information

© RILEM 2002

Authors and Affiliations

  • S. Zhutovsky
    • 1
  • K. Kovler
    • 1
  • A. Bentur
    • 1
  1. 1.Technion-Israel Institute of TechnologyIsrael

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