Chloride Resistance and Compressive Strength of Concrete with Silica Fume
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Abstract
This paper aims to study the chloride penetration resistance and compressive strength of concrete containing silica fume. The binder content in concrete was replaced by silica fume at 5%, 7.5%, 10% and 15% by weight of binder. The water to binder ratios were used at 0.40 and 0.50. The rapid chloride penetrations of concrete were tested at 7, 28 and 91 days of water curing. Chloride penetration by bulk diffusion were tested at 28 days of water curing and immersed in 5.0% chloride concentration for 28, 56 and 91 days. The compressive strengths of concrete were tested at 7, 14, 28, 56 and 91 days of water curing. From the experimental results, it was found that the use of silica fume to replace binder content in concrete resulted in the increase of the chloride penetration resistance and compressive strength of concrete. Concrete with 15% silica fume replacement had the highest chloride penetration resistance and compressive strength. Considering the relationship between compressive strength and charge passed content and chloride diffusion coefficient of concrete, it was noted that the charge passed content and the chloride diffusion coefficient decreased with increasing compressive strength. Based on the relationship equations, the charged pass content and the chloride diffusion coefficient can be determined from the compressive strength of concrete.
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References
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