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<p>This study examines the effects of incorporating various proportions of aluminium powder (0.1–0.3%) as a partial replacement for cement and glass fibre (0.0-0.2%) as a partial replacement for fine aggregate, on the properties of sustainable Autoclaved Aerated Concrete (AAC) material. A rigorous statistical analysis has been undertaken to develop and validate the models that predict the impact of these materials on the properties of AAC. Mathematical models have been developed using regression analysis of the data obtained from required trial runs of experiments. It has been observed that with the increment of aluminium powder percentage in AAC, the water permeability coefficient response increases, whereas increment of fibre content slightly decreases water permeability coefficient. The compressive strength of AAC increases with the increment of fibre content and rather decreases with the increment of aluminium content. A corresponding increase in production cost of AAC has been recorded due to the increment in aluminium and fibre content. Accordingly, optimization adopting central composite design (CCD) coupled with desirability function has been conducted to determine the optimal quantity of aluminium and fibre for which maximum compressive strength can be achieved, while minimizing water permeability and production cost. The findings of this paper provide valuable insights for optimizing AAC mixtures, offering both economic and structural benefits. This work also reveals that the AAC blocks are more sustainable as lower CO<sub>2</sub> emissions (177.50 kgCO<sub>2</sub>-eq/m<sup>3</sup>) in construction Material production as compared to clay fired brick, aligning with United Nations Sustainable Development Goal 13 related to climate action.</p> Graphical Abstract <p></p>

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Optimizing Autoclaved Aerated Concrete Properties and Cost Efficiency by Utilizing a Hybrid Strategy of Response Surface Methodology and Desirability Approach

  • 期刊论文

  • 发表日期：

    2025年10月15日

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  • Palash Dey,
  • Ashim Paul,
  • Mrinmoy Dhar,
  • Sulaem Musaddiq Laskar

摘要

This study examines the effects of incorporating various proportions of aluminium powder (0.1–0.3%) as a partial replacement for cement and glass fibre (0.0-0.2%) as a partial replacement for fine aggregate, on the properties of sustainable Autoclaved Aerated Concrete (AAC) material. A rigorous statistical analysis has been undertaken to develop and validate the models that predict the impact of these materials on the properties of AAC. Mathematical models have been developed using regression analysis of the data obtained from required trial runs of experiments. It has been observed that with the increment of aluminium powder percentage in AAC, the water permeability coefficient response increases, whereas increment of fibre content slightly decreases water permeability coefficient. The compressive strength of AAC increases with the increment of fibre content and rather decreases with the increment of aluminium content. A corresponding increase in production cost of AAC has been recorded due to the increment in aluminium and fibre content. Accordingly, optimization adopting central composite design (CCD) coupled with desirability function has been conducted to determine the optimal quantity of aluminium and fibre for which maximum compressive strength can be achieved, while minimizing water permeability and production cost. The findings of this paper provide valuable insights for optimizing AAC mixtures, offering both economic and structural benefits. This work also reveals that the AAC blocks are more sustainable as lower CO2 emissions (177.50 kgCO2-eq/m3) in construction Material production as compared to clay fired brick, aligning with United Nations Sustainable Development Goal 13 related to climate action.

Graphical Abstract