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<p>Urban flooding and water management challenges due to impermeable pavements necessitate sustainable solutions like pervious concrete (PC). The aggregate plays an essential role in affecting the physical and mechanical properties of PC. Brick dust (BD), a waste byproduct of brick chip production, offers potential as a partial replacement for coarse aggregate (CA) in PC but remains understudied. This study examines the impact of incorporating BD, with a fineness modulus (FM) of 3.1, as a replacement for CA in increments of 5% up to 20% on properties such as porosity, abrasion resistance, durability, and water permeability. Porosity was measured using water displacement and image analysis, while water permeability was assessed using the modified constant head method (CHM) and the traditional field measurement method (FMM), and their results were compared. Abrasion resistance was evaluated using the Cantabro test with a Los Angeles abrasion machine, while durability was assessed through weight loss and water absorption in wet-dry cycles. The results show that each 5% BD addition reduces porosity by 3–4%, increases compressive strength by 1–3&#xa0;MPa, and lowers permeability, with strong linear correlations (<i>R</i><sup>2</sup> &gt; 90%). Image analysis showed porosity values 2–5% higher than those from the water displacement method, proving its effectiveness. While BD improves abrasion resistance and durability of standard-cured samples (SCS), wet-dry samples suffered severe durability losses, with 100% weight loss after 500 revolutions and compressive strength dropping below 50% of SCS values. This study advances waste utilization in eco-friendly infrastructure while addressing urban hydrological challenges.</p>

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Impact of brick dust addition on the physical and mechanical performance of pervious concrete

  • 期刊论文

  • 发表日期：

    2025年4月6日

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  • Md. Tushar Ali,
  • Muhammad Harunur Rashid

摘要

Urban flooding and water management challenges due to impermeable pavements necessitate sustainable solutions like pervious concrete (PC). The aggregate plays an essential role in affecting the physical and mechanical properties of PC. Brick dust (BD), a waste byproduct of brick chip production, offers potential as a partial replacement for coarse aggregate (CA) in PC but remains understudied. This study examines the impact of incorporating BD, with a fineness modulus (FM) of 3.1, as a replacement for CA in increments of 5% up to 20% on properties such as porosity, abrasion resistance, durability, and water permeability. Porosity was measured using water displacement and image analysis, while water permeability was assessed using the modified constant head method (CHM) and the traditional field measurement method (FMM), and their results were compared. Abrasion resistance was evaluated using the Cantabro test with a Los Angeles abrasion machine, while durability was assessed through weight loss and water absorption in wet-dry cycles. The results show that each 5% BD addition reduces porosity by 3–4%, increases compressive strength by 1–3 MPa, and lowers permeability, with strong linear correlations (R2 > 90%). Image analysis showed porosity values 2–5% higher than those from the water displacement method, proving its effectiveness. While BD improves abrasion resistance and durability of standard-cured samples (SCS), wet-dry samples suffered severe durability losses, with 100% weight loss after 500 revolutions and compressive strength dropping below 50% of SCS values. This study advances waste utilization in eco-friendly infrastructure while addressing urban hydrological challenges.