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Concrete 3D printing is extensively studied as an innovative construction technique. However, achieving optimal mechanical performance remains a significant challenge. To enhance the mechanical properties of 3D-printed mortar, it is essential to incorporate supplementary cementitious material rich in SiO2 as a partial replacement for cement. This study investigated five mortar mixtures designated CM, M-5, M-10, M-15, and M-20. The CM mix consisted of Portland cement, sand, superplasticizer (SP), and viscosity-modifying agent (VMA). In the other four mixes, Portland cement was partially replaced by SBA at 5%, 10%, 15%, and 20% by weight. The research explored the impact of SBA on both compressive and flexural strength of printed mortar specimens. The findings demonstrate that increasing the SBA content enhances the compressive strength of the printed mortar up to a 20% replacement level. As for flexural strength, it improves with up to 15% SBA replacement, after which it begins to decline. This improvement is attributed to the fineness of the SBA particles. This study offers practical strategies for reducing cement usage while simultaneously enhancing the strength of 3D-printed mortar.

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Enhancement of Mechanical Strength of 3D-Printed Mortar Using Partial Replacement of Cement by Sugarcane Bagasse Ash

  • 会议论文

  • 发表日期：

    2026年

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  • Syed Muhammad Mudassir Zia,
  • Jiao-Long Zhang

摘要

Concrete 3D printing is extensively studied as an innovative construction technique. However, achieving optimal mechanical performance remains a significant challenge. To enhance the mechanical properties of 3D-printed mortar, it is essential to incorporate supplementary cementitious material rich in SiO2 as a partial replacement for cement. This study investigated five mortar mixtures designated CM, M-5, M-10, M-15, and M-20. The CM mix consisted of Portland cement, sand, superplasticizer (SP), and viscosity-modifying agent (VMA). In the other four mixes, Portland cement was partially replaced by SBA at 5%, 10%, 15%, and 20% by weight. The research explored the impact of SBA on both compressive and flexural strength of printed mortar specimens. The findings demonstrate that increasing the SBA content enhances the compressive strength of the printed mortar up to a 20% replacement level. As for flexural strength, it improves with up to 15% SBA replacement, after which it begins to decline. This improvement is attributed to the fineness of the SBA particles. This study offers practical strategies for reducing cement usage while simultaneously enhancing the strength of 3D-printed mortar.