Influence of creep and shrinkage on cracking in high strength concrete - INSA Toulouse - Institut National des Sciences Appliquées de Toulouse
Article Dans Une Revue Cement and Concrete Research Année : 1992

Influence of creep and shrinkage on cracking in high strength concrete

Résumé

Efficient use of high strength concrete (HCS) depends on a thorough understanding of its long term behaviour. However, its good mechanical performance must not blind its durability properties which are affected by cracking, as recent studies have shown. This paper deals with surface microcracking developed both by creep and shrinkage on young age loaded HSC. The HSC cylinders were stored for 400 days in an air conditioned room (50% RH and 20°C). Creep load up to 32 MPa was applied 28 hours after batching. Moreover, the effect of the desiccation was studied in unloaded samples. Microcracking was observed by SEM with replica technique and analyzed with the stereological tools of total projections. The main conclusion is that the intensity of the compressive creep load disturbs the orientation and density of surface microcracking due to desiccation and that recovery after unloading induces surface microcracking, which is strongly oriented in a given direction.

Domaines

Génie civil

Dates et versions

hal-02341234 , version 1 (31-10-2019)

Identifiants

Citer

Vincent Sicard, Raoul François, Erick Ringot, Gérard Pons. Influence of creep and shrinkage on cracking in high strength concrete. Cement and Concrete Research, 1992, 22 (1), pp.159-168. ⟨10.1016/0008-8846(92)90146-M⟩. ⟨hal-02341234⟩
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