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<p>The appropriate use of fillers is crucial for the performance of asphalt mixtures, as fillers fill the voids between aggregates and enhance pavement compressive strength. Rock dust (SD), a traditional filler, often faces availability challenges in regions distant from crushed stone production. Cement (CE), with its strong binding properties, has emerged as a viable alternative. This study explored the relationship between compressive stress, strain, and volumetric properties in mixtures of SD, CE, and asphalt with varying asphalt contents. SD and CE were consistently use asphalt contents levels ranging from 5 to 7% in 0.5% increments. Ultrasonic pulse velocity (UPV) test results revealed that the compressive strength with SD was 4.5% lower compared to CE mixtures. A difference of less than 10% indicated that SD and CE are compatible as filler replacements. This study was designed to address the scarcity of SD in areas with limited access to natural crushed stone and sand resources. The compressive strength and strain of asphalt mixtures with SD and CE exhibited a four-part pattern: load adjustment, reversible, and irreversible deformation, with elastoplastic behavior at 80% of peak stress. This behavior was attributed to the similarity in most physical properties of both fillers, despite differing peak stresses. CE provided superior compressive strength, volumetric properties, elastic modulus, dynamic modulus, and toughness index compared to SD, demonstrating better resistance to deformation and cracking. Volumetric tests, including void in mix (VIM), void in the mineral aggregate (VMA), and void filled by bitumen (VFB), showed that mixtures containing SD and CE with 6-7% asphalt content were compatible.</p>

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Reliability laboratory investigation of hot asphalt mixtures containing stone dust and cement as fillers: combined compressive strength and ultrasonic pulse velocity

  • 期刊论文

  • 发表日期：

    2025年1月7日

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  • Andre Pieli Pratama,
  • Muhammad Akbar Caronge,
  • Muhammad Wihardi Tjaronge

摘要

The appropriate use of fillers is crucial for the performance of asphalt mixtures, as fillers fill the voids between aggregates and enhance pavement compressive strength. Rock dust (SD), a traditional filler, often faces availability challenges in regions distant from crushed stone production. Cement (CE), with its strong binding properties, has emerged as a viable alternative. This study explored the relationship between compressive stress, strain, and volumetric properties in mixtures of SD, CE, and asphalt with varying asphalt contents. SD and CE were consistently use asphalt contents levels ranging from 5 to 7% in 0.5% increments. Ultrasonic pulse velocity (UPV) test results revealed that the compressive strength with SD was 4.5% lower compared to CE mixtures. A difference of less than 10% indicated that SD and CE are compatible as filler replacements. This study was designed to address the scarcity of SD in areas with limited access to natural crushed stone and sand resources. The compressive strength and strain of asphalt mixtures with SD and CE exhibited a four-part pattern: load adjustment, reversible, and irreversible deformation, with elastoplastic behavior at 80% of peak stress. This behavior was attributed to the similarity in most physical properties of both fillers, despite differing peak stresses. CE provided superior compressive strength, volumetric properties, elastic modulus, dynamic modulus, and toughness index compared to SD, demonstrating better resistance to deformation and cracking. Volumetric tests, including void in mix (VIM), void in the mineral aggregate (VMA), and void filled by bitumen (VFB), showed that mixtures containing SD and CE with 6-7% asphalt content were compatible.