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The incorporation of pozzolanic additives in concrete may yield benefits such as increased compressive strength and decreased permeability. Specifically, the addition of silica fume (SF) in concrete has been found to enhance its strength and durability properties although it reduces workability. The introduction of nano-silica (nS) further diminishes workability. The current study is focused to evaluate and optimize the dosages of these materials to attain the optimal equilibrium between workability and desired concrete properties. The content of nano silica has been varied from 0–4% for substituting cement in silica fume (10%) based concrete. The results indicate that an increase in nS concentration in the presence of SF leads to a noticeable decrease in compaction factor values with increase in mechanical strength providing resistance towards water absorption and sulphate attack. Thus, optimal dosage of these pozzolanic additives is highly desirable in the society to promote sustainable construction techniques.

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Mechanical Properties and Durability of Nanosilica Strengthened Silica Fume-Based Concrete

  • 会议论文

  • 发表日期：

    2026年

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  • Sandeep Singla,
  • Anjali Gupta,
  • Tanu Taneja

摘要

The incorporation of pozzolanic additives in concrete may yield benefits such as increased compressive strength and decreased permeability. Specifically, the addition of silica fume (SF) in concrete has been found to enhance its strength and durability properties although it reduces workability. The introduction of nano-silica (nS) further diminishes workability. The current study is focused to evaluate and optimize the dosages of these materials to attain the optimal equilibrium between workability and desired concrete properties. The content of nano silica has been varied from 0–4% for substituting cement in silica fume (10%) based concrete. The results indicate that an increase in nS concentration in the presence of SF leads to a noticeable decrease in compaction factor values with increase in mechanical strength providing resistance towards water absorption and sulphate attack. Thus, optimal dosage of these pozzolanic additives is highly desirable in the society to promote sustainable construction techniques.