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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Study of the influence of cements on creep in concretes used in civil construction

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Author(s):
M. A. Coimbra [1] ; W. Libardi [2] ; M. R. Morelli [3]
Total Authors: 3
Affiliation:
[1] Universidade Federal de S. Carlos. Departamento de Engenharia de Materiais
[2] Universidade Federal de S. Carlos. Departamento de Engenharia de Materiais
[3] Universidade Federal de S. Carlos. Departamento de Engenharia de Materiais
Total Affiliations: 3
Document type: Journal article
Source: Cerâmica; v. 52, n. 321, p. 98-104, 2006-03-00.
Abstract

This paper reports on a study of the influence of two different types of Portland cement on the creep property of concretes, a viscous elastic property originating in the hardened cement paste and presumably related mainly to the removal of adsorbed water. The causes of creep in concrete are complex. It is a generally accepted fact that, in addition to the movement of moisture, other causes contribute to the creep phenomenon. The nonlinearity of the stress-deformation relation in concrete, especially at levels of stress exceeding 30 to 40 per cent of the ultimate stress, clearly indicates the contribution of transition zone microcracks to creep, a phenomenon well known in civil and materials engineering. The controlled microstructure formation technique has been indicated as a promising alternative for understanding the creep mechanism. This study included a review of the literature to identify the main parameters and variables involved in the creep property, aiming to encourage development and research on this subject. (AU)