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<p>This study investigated the use of floor-tile waste powder (FTWP) and incinerated hospital waste (HW) as 6% alternative mineral fillers in asphalt mastics and dense-graded mixtures, comparing them against conventional CaCO<sub>3</sub>. Laboratory testing, including dynamic shear and bending-beam rheometry, Marshall stability and flow, indirect tensile strength, and Kim deformation, showed that FTWP-modified mastic increased rutting resistance (G*/sin δ) by 86.52% and fatigue resistance (G *sin δ) by 87.48%, raised the softening point from 51&#xa0;°C to 56&#xa0;°C, and reduced penetration by 14.29% due to its finer particles and strong interparticle bonding. In mixtures, FTWP yielded a 16.63% higher Marshall stability (12.33 kN → 14.38 kN) and a tensile strength ratio of 94.36%, while life-cycle cost analysis demonstrated $1.22/ton savings compared to conventional mixes. HW also improved performance (e.g., 82.17% gain in G*/sin δ), though to a lesser extent. These enhancements offer immediate value for the design and maintenance of high-traffic pavements by delivering more durable, cost-effective, and sustainable surface courses.</p>

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Performance of Asphalt Binders and Mixtures Containing Hospital Waste and Floor Tile Waste Powder as Alternative Filler

  • 期刊论文

  • 发表日期：

    2025年8月20日

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  • A. I. Al-Hadidy,
  • Amani A. Al-Ttayiy,
  • Mohammed Ghanim Jamel,
  • Ayman T. Hamid

摘要

This study investigated the use of floor-tile waste powder (FTWP) and incinerated hospital waste (HW) as 6% alternative mineral fillers in asphalt mastics and dense-graded mixtures, comparing them against conventional CaCO3. Laboratory testing, including dynamic shear and bending-beam rheometry, Marshall stability and flow, indirect tensile strength, and Kim deformation, showed that FTWP-modified mastic increased rutting resistance (G*/sin δ) by 86.52% and fatigue resistance (G *sin δ) by 87.48%, raised the softening point from 51 °C to 56 °C, and reduced penetration by 14.29% due to its finer particles and strong interparticle bonding. In mixtures, FTWP yielded a 16.63% higher Marshall stability (12.33 kN → 14.38 kN) and a tensile strength ratio of 94.36%, while life-cycle cost analysis demonstrated $1.22/ton savings compared to conventional mixes. HW also improved performance (e.g., 82.17% gain in G*/sin δ), though to a lesser extent. These enhancements offer immediate value for the design and maintenance of high-traffic pavements by delivering more durable, cost-effective, and sustainable surface courses.