Abstract
To determine the modulus of elasticity of concrete precisely is very important for structures that require strict control of the deformability. International codes propose a wide variety of formulae which establish a relationship between modulus of elasticity and compressive strength. Most of these codes are valid up to 50 MPa, the usual limit for normal concretes. A research programme has been carried out to establish the modulus of elasticity-compressive strength curve for low and high strength concretes. The effect of the aggregate also has been studied. This is an important factor to take into account, sometimes more important than the concrete strength itself or even age. A model code formula provides good correlation with experiment up to a compressive strength of 120 MPa. Other aggregates not considered for this code have been studied and results given. Also, the influence of age on the modulus of elasticity is discussed.
Resume
Il est très important de déterminer avec précision le module d'élasticité du béton dans les structures qui demandent un contrôle strict de la déformation. Les codes internationaux proposent une grande variété de formules, lesquelles établissent une relation entre le module d'élasticité et la résistance à la compression. La plupart de ces codes sont valables jusqu'à 50 MPa, limite usuelle pour des bétons normaux. On a réalisé un programme de recherche afin d'établir la courbe module d'élasticité/résistance à la compression de bétons à haute et basse résistance. L'influence du granulat a aussi été étudiée. Ceci est un facteur important à considérer, parfois plus important que la résistance ou l'âge. les formules proposées par notre model code ont présenté le meilleur ajustement aux résultats jusqu'a 120 MPa de résistance à la compression. D'autres granulats, qui n'ont pas été considérés dans ce code, ont aussi été étudiés et la proposition a été complétée. L'influence de l'âge sur le module d'élasticité a aussi été étudiée.
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Gutierrez, P.A., Canovas, M.F. The modulus of elasticity of high performance concrete. Materials and Structures 28, 559–568 (1995). https://doi.org/10.1007/BF02473187
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DOI: https://doi.org/10.1007/BF02473187