Influence of Mix Composition on Mechanical Properties of High-Performance Silica-Fume Concrete

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Title: Influence of Mix Composition on Mechanical Properties of High-Performance Silica-Fume Concrete

Author(s): Francois De Larrard and Larrard and Robert Le Roy

Publication: Special Publication

Volume: 132

Issue:

Appears on pages(s): 965-986

Keywords: compressive strength; high-strength concretes; self-dessication; mathematical models; modulus of elasticity; shrinkage; silica fume; superplasticizers; Materials Research

Date: 5/1/1992

Abstract:
Discusses the relationship between the composition and the mechanical properties (compressive strength, modulus of elasticity, autogenous shrinkage) of high-strength concretes (HSC) in the range of 50 to 100 Mpa. The models proposed for each of these properties are based on an analysis of the hardened concrete as a composite material, making it possible to go from the properties of the concrete to those of its matrix. The properties of the matrix are related to the two main parameters of composition (water-cement and silica-cement ratios) by empirical models obtained by smoothing the experimental data. Eleven concretes were made using the same constituents; the parameters of composition were varied separately to determine their influence on the properties in question. These experimental data, together with other data taken from the literature, were used to evaluate the accuracy of the proposed models. It is finally shown that these models, which sum up the current knowledge of the material, can be useful in designing HSCs according to specifications.