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The incorporation of pozzolanic additives has the potential to promote the mechanical characteristics and longevity of concrete. These benefits may manifest in the form of heightened compressive strength and decreased permeability. The incorporation of pozzolanic additives in concrete has been found to enhance its strength and durability properties. However, this improvement is accompanied by a reduction in workability. The introduction of MS exacerbates this effect. This study is focused to evaluate the optimized dosages of microsilica (MS) in metakaolin (MK) based concrete to attain the optimal equilibrium between workability and the intended concrete characteristics. The content of MS has been varied from 0–15% for substituting cement. The results indicate that an increased MS concentration in the presence of MK cause a noticeable decrease in setting time with increase in consistency and mechanical strength providing microstructural enhancement at optimal dosage. The results have been confirmed by XRD analysis. Thus, optimal dosage of these pozzolanic additives is highly desirable to enhance structural aspects of the concrete.

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Mechanical Properties and Durability of Micro-Strengthened Metakaolin Based Concrete

  • 会议论文

  • 发表日期：

    2025年

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  • Manisha Bansal,
  • Manjeet Bansal,
  • Bal Krishan,
  • Rishav Garg

摘要

The incorporation of pozzolanic additives has the potential to promote the mechanical characteristics and longevity of concrete. These benefits may manifest in the form of heightened compressive strength and decreased permeability. The incorporation of pozzolanic additives in concrete has been found to enhance its strength and durability properties. However, this improvement is accompanied by a reduction in workability. The introduction of MS exacerbates this effect. This study is focused to evaluate the optimized dosages of microsilica (MS) in metakaolin (MK) based concrete to attain the optimal equilibrium between workability and the intended concrete characteristics. The content of MS has been varied from 0–15% for substituting cement. The results indicate that an increased MS concentration in the presence of MK cause a noticeable decrease in setting time with increase in consistency and mechanical strength providing microstructural enhancement at optimal dosage. The results have been confirmed by XRD analysis. Thus, optimal dosage of these pozzolanic additives is highly desirable to enhance structural aspects of the concrete.