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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Strain Rate Sensitivities of Strength and Deformation of High-Strength Silica Fume Concrete
Author(s): N. Han and J. C. Walraven
Publication: Special Publication
Appears on pages(s): 687-702
Keywords: compression; deformation; high-strength concretes; porosity; silica fume; strains; strength; tension; Materials Research
Abstract:The sensitivity of strength and deformation of high-strength concrete incorporating silica fume to variations in strain rates were studied experimentally and compared with those of normal strength concrete (without silica fume). The observed phenomena in the experiments were qualitatively interpreted according to an assumed mechanism of strain rate sensitivity of concrete. The differences of the material structure between high-strength concrete with silica fume and normal strength concrete without silica fume are discussed in this paper; emphasis is placed on the change of pore structure and moisture content due to the incorporation of silica fume for high-strength concrete and its influence on the rate sensitivities to strength and deformation of concrete. In particular, the Stefan Effect is believed to play a very important role in the case of rate sensitivity. In general, it was found that high-strength silica fume concrete is more sensitive to the variation of strain rate than normal strength concrete as far as strength and deformation in compression are concerned. However, in tension, this rate sensitivity is less pronounced.
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