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The present study explores the durability characteristics of an alkali-activated binder (AAB) made from red soil, focusing on its sorptivity and resistance to acid and sulfate exposure. As the construction industry seeks sustainable alternatives, understanding AAB properties is crucial for their broader adoption. The results indicate that AAB mortar achieves a compressive strength of 39.25 MPa after 28 days, approximately 19% stronger than conventional cement (CC) mortar. This enhanced strength is due to higher silicon, aluminum, and calcium oxide levels, which improve pozzolanic reactions, along with the beneficial role of ground granulated blast-furnace slag (GGBS) in forming critical gel compounds. Durability assessments reveal that AAB has significantly lower water absorption rates and exhibits superior resistance to 5% sulfuric acid, with minimal surface cracking compared to CC. Additionally, AAB shows no damage when exposed to magnesium sulfate, while CC suffers deterioration. These findings underscore the potential of AABs as durable, sustainable construction materials, warranting further research to optimize their applications.

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Comparative Durability Study on Locally Available Red Soil Blended Alkali-Activated Binder and Conventional Cement Binder

  • 会议论文

  • 发表日期：

    2026年

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  • Souvik Das,
  • Sahil Pritam Swain,
  • Bijoli Mondal,
  • Dibyendu Adak

摘要

The present study explores the durability characteristics of an alkali-activated binder (AAB) made from red soil, focusing on its sorptivity and resistance to acid and sulfate exposure. As the construction industry seeks sustainable alternatives, understanding AAB properties is crucial for their broader adoption. The results indicate that AAB mortar achieves a compressive strength of 39.25 MPa after 28 days, approximately 19% stronger than conventional cement (CC) mortar. This enhanced strength is due to higher silicon, aluminum, and calcium oxide levels, which improve pozzolanic reactions, along with the beneficial role of ground granulated blast-furnace slag (GGBS) in forming critical gel compounds. Durability assessments reveal that AAB has significantly lower water absorption rates and exhibits superior resistance to 5% sulfuric acid, with minimal surface cracking compared to CC. Additionally, AAB shows no damage when exposed to magnesium sulfate, while CC suffers deterioration. These findings underscore the potential of AABs as durable, sustainable construction materials, warranting further research to optimize their applications.