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<p>Concrete durability is crucial for promoting sustainable construction, especially given the increasing need to reduce reliance on natural resources by incorporating recycled materials. However, the poor durability and effectiveness of recycled aggregate concrete (RAC) have hindered its use as structural concrete. As the superplasticizer (SP) can produce dense concrete with low porosity, investigating its influence on the durability of RAC is the main focus of this research. Natural aggregates were replaced with recycled concrete aggregate at replacement ratios of 0%, 25%, 50%, and 100%, with a 15% reduction in mixing water applied to half of the samples. The results demonstrated a substantial improvement in RAC durability with SP usage, as chloride ion permeability and total passing charge were reduced, indicating increased resistance to corrosion. These findings confirm that SP improves density and reduces water absorption, enhancing the viability of RAC for structural applications and supporting its use as a sustainable option in the construction industry.</p>

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Durability assessment of recycled aggregate concrete admixed with superplasticizer

  • 期刊论文

  • 发表日期：

    2025年6月10日

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  • Faruk Patowary,
  • Mohammad Al Amin Siddique

摘要

Concrete durability is crucial for promoting sustainable construction, especially given the increasing need to reduce reliance on natural resources by incorporating recycled materials. However, the poor durability and effectiveness of recycled aggregate concrete (RAC) have hindered its use as structural concrete. As the superplasticizer (SP) can produce dense concrete with low porosity, investigating its influence on the durability of RAC is the main focus of this research. Natural aggregates were replaced with recycled concrete aggregate at replacement ratios of 0%, 25%, 50%, and 100%, with a 15% reduction in mixing water applied to half of the samples. The results demonstrated a substantial improvement in RAC durability with SP usage, as chloride ion permeability and total passing charge were reduced, indicating increased resistance to corrosion. These findings confirm that SP improves density and reduces water absorption, enhancing the viability of RAC for structural applications and supporting its use as a sustainable option in the construction industry.