Abstract
The physical origins of the basic creep of concrete are still poorly understood even though some researchers have proposed hypotheses concrening the physical mechanisms that govern this delayed behaviour of concrete. A very complete summing up of these hypotheses was produced, in the past, by, Neville; he shows that none of them, provides a satisfactory explanation of the bulk of basic creep. More recently, Rossi has proposed a new hypothesis, which has been the subject of several articles. This article concerns the use of the acoustic emission technique as a ‘tool’ to provide information on the pertinence of the physical hypothesis advanced by Rossi.
The counting of the total number of acoustic events together with a frequency analysis of the acoustic emission signals indicate that there is a strong correlation between the basic creep of concrete and the creation of microcracks in the material.
Resume
Les origines physiques du fluage propre du béton sont encore mal comprises bien qu'un certain nombre de chercheurs aient proposé des hypothèse concernant les mécanismes physiques qui régissent ce comportement différé du béton. Plus récement, Rossi a proposé une nouvelle hypothèse. Elle repose sur la création de microfissures au sein du matériau entraînant des mouvements internes de vapeur d'eau. Le présent article concerne l'utilisation de la technique d'émission acoustique comme ‘outil’ permettant de fournir des informations sur la pertinence de cette hypothèse physique. L'étude expérimentale montre que la déformation de fluage propre est proportionnelle au nombre cumulé de microfissures créées au sein du matériau. Elle renforce donc l'hypothèse que le fluage propre du béton repose sur la création de microfissures au sein du matériau.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Neville, A. M., ‘Creep of Concrete: Reinforced and Prestressed’, (North-Holland, Amsterdam, 1970).
Rossi, P. and Acker, P., ‘A new approach to the basic creep and relaxation of concrete’,Cement Concr. Res.,18 (1988) 799–803.
Rossi, P., ‘Influence of cracking in the presence of free water on the mechanical behaviour of concrete’,Mag. Concr. Res.,43(154) (1991) 53–57.
Idem, Rossi, P., ‘A new approach concerning the basic creep and relaxation of concrete’,Bulletin de Liaison des Laboratoire des Ponts et Chaussées, no. 153, pp. 73–76 (in French).
Rossi, P., Robert, J. L., Gervais, J. P. and Bruhat, D., ‘The use of acoustic emission in fracture mechanics applied to concrete’.Engng Fracture Mech.,35(4/5) (1990) 751–763.
Idem,, ‘Identification of the physical mechanisms underlying acoustic emissions during the cracking of concrete’,Mater. Struct.,22 (1989) 194–198.
Acker, P., ‘Measurement of time-dependent strains of concrete loaded in compression’, RILEM Recommendation.
Acker, P., Barral, A. and Clédat de la Vigeria, X., ‘Delayed behaviour of concrete: relaxation test apparatus’Bulletin de Liaison des Laboratoire des Ponts, et Chaussées, no. 128, pp. 121–123 (in French).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Rossi, P., Godart, N., Robert, J.L. et al. Investigation of the basic creep of concrete by acoustic emission. Materials and Structures 27, 510–514 (1994). https://doi.org/10.1007/BF02473211
Issue Date:
DOI: https://doi.org/10.1007/BF02473211