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Cerâmica

versão impressa ISSN 0366-6913

Resumo

COIMBRA, M. A.; LIBARDI, W.  e  MORELLI, M. R.. Study of the influence of cements on creep in concretes used in civil construction. Cerâmica [online]. 2006, vol.52, n.321, pp. 98-104. ISSN 0366-6913.  http://dx.doi.org/10.1590/S0366-69132006000100015.

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.

Palavras-chave : Portland cement; concrete; properties; creep.

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