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This study is part of ongoing research that investigated the potential application of ureolytic bacteria that have been isolated in the laboratory, in order to enhance calcined clay concrete’s compressive strength in a saline environment. The formation of calcite by Bacillus Subtilis bacteria is a laboratory model bacterium, which is able to generate precipitation of calcite in an appropriate media augmented with a calcium source. Clay material used was sun-dried and pulverized after which it was calcined at a temperature of 600 °C for two hours. The calcined clay was used to replace 5, 15, 25 and 35% by mass of cement, a total of 96 numbers of concrete cubes (100 × 100 × 100 mm) were cast and cured in potable water and chloride environment. Compressive strength tests were carried out after 3, 7, 14, 21 and 28 days of curing and it was found that concretes cured in the saline environment generally develop greater strength in comparison with concretes cured in potable water and calcined clay concrete at 15% gave the greatest strength in both curing environment.

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Mechanical Properties of Calcined Clay Concrete Prepared with Cultured Bacteria Cured in Saline Environment

  • 会议论文

  • 发表日期：

    2025年

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  • Akindehinde Ayotunde Akindahunsi,
  • Stella Mojisola Adeyemo,
  • Iyanuoluwa Isaac Oyeniyi,
  • Emmaunel Olorunfemi Ojo

摘要

This study is part of ongoing research that investigated the potential application of ureolytic bacteria that have been isolated in the laboratory, in order to enhance calcined clay concrete’s compressive strength in a saline environment. The formation of calcite by Bacillus Subtilis bacteria is a laboratory model bacterium, which is able to generate precipitation of calcite in an appropriate media augmented with a calcium source. Clay material used was sun-dried and pulverized after which it was calcined at a temperature of 600 °C for two hours. The calcined clay was used to replace 5, 15, 25 and 35% by mass of cement, a total of 96 numbers of concrete cubes (100 × 100 × 100 mm) were cast and cured in potable water and chloride environment. Compressive strength tests were carried out after 3, 7, 14, 21 and 28 days of curing and it was found that concretes cured in the saline environment generally develop greater strength in comparison with concretes cured in potable water and calcined clay concrete at 15% gave the greatest strength in both curing environment.