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<p>Rapid urbanization and monsoon-intense rainfall in Bangladesh exacerbate urban waterlogging, while conventional reinforced concrete drainage covers hinder infiltration and increase surface runoff. This study proposes and validates a modified pervious concrete drainage cover slab as a permeable alternative, aimed at improving stormwater infiltration. The modified pervious concrete (MPC) incorporates lime mortar and recycled PET fibers, offering a water-permeable, lower-carbon solution. Laboratory optimization identified an MPC mix that achieved adequate mechanical performance (≈ 18&#xa0;MPa compressive strength at 28&#xa0;days) while retaining interconnected porosity, and a field-scale prototype demonstrated a high infiltration capacity (≈ 480&#xa0;mm/h). A cradle-to-gate lifecycle assessment indicated that MPC reduces embodied greenhouse-gas emissions by ≈ 37% compared to conventional reinforced concrete slabs, primarily by avoiding steel reinforcement and utilizing PET waste. The proposed MPC drainage cover provides a practical solution to improve stormwater infiltration and reduce embodied carbon in flood-prone Bangladeshi cities.</p> Graphical abstract

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Modified pervious concrete drainage cover slab: engineering performance and lifecycle carbon assessment

  • 期刊论文

  • 发表日期：

    2026年6月16日

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  • Abid Hussain,
  • Md. Akhtar Hossain,
  • Proton Sarker,
  • Zarin Anan Adeeba

摘要

Rapid urbanization and monsoon-intense rainfall in Bangladesh exacerbate urban waterlogging, while conventional reinforced concrete drainage covers hinder infiltration and increase surface runoff. This study proposes and validates a modified pervious concrete drainage cover slab as a permeable alternative, aimed at improving stormwater infiltration. The modified pervious concrete (MPC) incorporates lime mortar and recycled PET fibers, offering a water-permeable, lower-carbon solution. Laboratory optimization identified an MPC mix that achieved adequate mechanical performance (≈ 18 MPa compressive strength at 28 days) while retaining interconnected porosity, and a field-scale prototype demonstrated a high infiltration capacity (≈ 480 mm/h). A cradle-to-gate lifecycle assessment indicated that MPC reduces embodied greenhouse-gas emissions by ≈ 37% compared to conventional reinforced concrete slabs, primarily by avoiding steel reinforcement and utilizing PET waste. The proposed MPC drainage cover provides a practical solution to improve stormwater infiltration and reduce embodied carbon in flood-prone Bangladeshi cities.

Graphical abstract