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Influence of composite materials confinement on alkali-aggregate mechanical behaviour

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Abstract

In a previous study [6], we have presented an original experimental procedure for results expansion alcali aggregate reaction. Our main goal is to identify the influence of the confinement by composite materials on alkali-aggregate expansion.

In this paper, we are going to present a serie of compressive tests that were carried out in order to investigate the mechanical behaviour during alkali aggregate attack at different ageing periods. We also evaluate the influence of composite material confinement on the mechanical characteristics of these concretes. This will be demonstrated in this second part.

The specimens used for expansion were loaded in compression until they fractured at four successive stages in the ageing process.

Our results show a significant increase in the mechanical characteristics of the confined alkali reactive specimens in comparison with the non confined specimens: the confined specimens not only withstand compressive stresses four to five times as high as non-confined ones, but their stress/strain curves follow a ‘linear evolution’ whereas non-confined specimens seem to behave like powdery materials. Our experiments show that the increase in strength is much more important with this kind of alkali aggregate concrete confined by composite materials.

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Authors and Affiliations

  1. Laboratoire Mécanique Matériaux Structure (L2MS), Université Claude Bernard Lyon I, 82, bd Niels Bohr Domaine Scientifique de la Doua, 69622, Villeurbanne Cedex, France

    I. Mohamed, S. Ronel & L. Curtil

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  1. I. Mohamed
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  2. S. Ronel
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  3. L. Curtil
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Mohamed, I., Ronel, S. & Curtil, L. Influence of composite materials confinement on alkali-aggregate mechanical behaviour. Mater Struct 39, 479–490 (2006). https://doi.org/10.1007/s11527-005-9019-2

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  • DOI: https://doi.org/10.1007/s11527-005-9019-2

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