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The research aims to investigate the effect of an internal curing agent in blended concrete with 100% replacement of river sand with robo sand as a fine aggregate. Polyethylene glycol-400 (PEG-400) is used as an internal curing agent with dosages of 0.5, 1, and 1.5% by the weight of the cementitious content in the concrete. A water curing regime is also performed which is considered as conventional concrete. M65 grade of concrete is considered for the experimental process. Two different microfines, alccofine-1203 and microsilica, are used along with GGBS, to compare how different microfines influence the properties of concrete. Various tests are performed on the concrete to scrutinize the mechanical properties like compression test, flexure test, and split tensile test. Durability tests like water permeability, chemical resistance, and RCPT are conducted. A non-destructive test, ultrasonic pulse velocity is evaluated. The experiment shows that by using of PEG-400 as curing agent, there is an improvement of hydration reaction in concrete forming better cement paste matrix. PEG-400 has shown effective results in improving different properties of concrete. About 1% of PEG-400 is found to be the optimum dosage. With usage of Alccofine-1203 showed more effectiveness in improving mechanical properties of concrete, whereas using microsilica in concrete showed better results in durability properties.

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Assessing the Performance of Mechanical and Durability Properties of Internally Cured Blended Concrete Using Robo Sand as Fine Aggregate

  • 会议论文

  • 发表日期：

    2026年

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  • M. Kalyan,
  • Moinuddin Ahmed,
  • V. Bhikshma,
  • A. Saketh Reddy,
  • U. Nagaraju

摘要

The research aims to investigate the effect of an internal curing agent in blended concrete with 100% replacement of river sand with robo sand as a fine aggregate. Polyethylene glycol-400 (PEG-400) is used as an internal curing agent with dosages of 0.5, 1, and 1.5% by the weight of the cementitious content in the concrete. A water curing regime is also performed which is considered as conventional concrete. M65 grade of concrete is considered for the experimental process. Two different microfines, alccofine-1203 and microsilica, are used along with GGBS, to compare how different microfines influence the properties of concrete. Various tests are performed on the concrete to scrutinize the mechanical properties like compression test, flexure test, and split tensile test. Durability tests like water permeability, chemical resistance, and RCPT are conducted. A non-destructive test, ultrasonic pulse velocity is evaluated. The experiment shows that by using of PEG-400 as curing agent, there is an improvement of hydration reaction in concrete forming better cement paste matrix. PEG-400 has shown effective results in improving different properties of concrete. About 1% of PEG-400 is found to be the optimum dosage. With usage of Alccofine-1203 showed more effectiveness in improving mechanical properties of concrete, whereas using microsilica in concrete showed better results in durability properties.