Influence of Silica Fume on the Tensile Strength of Concrete

In concrete, cracks can propagate very easily in tension, and the cracking of concrete due to its tensile stress being exceeded may cause serviceability and durability problems. This article reports on a study undertaken to determine the isolated influence of silica fume on the split and flexural tensile strength of concrete; the study also reports corresponding compressive strengths. The study included extensive experimentation on water-binder ratios ranging from 0.26 to 0.42 and silica fume-binder ratios from 0.0 to 0.3. The compressive, as well as the tensile, strengths increased with silica fume incorporation, and the results indicate that the optimum replacement percentage is not a constant one, but depends on the w/c (water to cement) ratio of the mix. The optimum 28-day split tensile strength has been obtained in the range of 5-10% silica fume replacement level, whereas the value for flexural strength ranged from 15% to 25%.


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  • Accession Number: 01000512
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 2 2005 8:55AM