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<p>Fluid Mastic Asphalt mixture refers to a skeleton-ultra-dense asphalt mixture with virtually zero internal voids, formed by highly fluid mastic filling the voids of aggregates through self-flow or assisted compaction techniques such as vibration. The tensile deformability of Fluid Mastic Asphalt mixture significantly enhanced while ensuring resistance to rutting, thereby markedly improving their resistance to reflective and fatigue cracking. This improvement holds promise for addressing pavement distresses such as reflective cracking and fatigue cracking, thereby improving pavement durability. In this study, nine Fluid Mastic Asphalt mixtures with a wide range of asphalt contents (asphalt-aggregate ratio from 6.3 to 10.5%) were designed. The effects of asphalt-aggregate ratio, filler-asphalt ratio, and mastic content on the mechanical properties of Fluid Mastic Asphalt mixture—including strength, deformability, and resilience in both tensile and compressive directions were investigated through compressive strength tests, compressive resilient modulus tests, and self-designed tensile strength and tensile resilient modulus tests. The results demonstrate that Fluid Mastic Asphalt mixture exhibits exceptional deformation performance, particularly in tensile deformation. Compared to conventional mixtures, Fluid Mastic Asphalt mixture achieves maximum enhancements of 340% in tensile deformability and 140% in compressive deformability, along with 500% and 130% improvements in tensile and compressive resilience respectively, while maintaining comparable resilience ratios. These findings confirm Fluid Mastic Asphalt mixture’s superior coordinated deformation characteristics. Notably, Fluid Mastic Asphalt mixture displays greater tension-compression disparity and a broader adjustable range of tensile deformation than conventional mixtures, providing greater flexibility in deformation-oriented design. The filler-asphalt ratio exerts significantly greater influence on tensile deformation properties than does the mastic content. Therefore, reducing the filler-asphalt ratio (rather than increasing mastic content) is recommended when designing the optimal asphalt-aggregate ratio to improve mixture deformation properties. A predictive model for Fluid Mastic Asphalt mixture deformation properties was developed, providing a quantitative basis for deformation-oriented mix design.</p>

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Laboratory Investigations of the Tensile and Compressive Properties of Fluid Mastic Asphalt Mixtures with a Wide Range of Asphalt Contents

  • 期刊论文

  • 发表日期：

    2025年8月14日

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  • Guihai Nie,
  • Hao Li,
  • Kuanghuai Wu,
  • Xu Cai,
  • Wenke Huang,
  • Daxin Zhou,
  • Jiandong Huang

摘要

Fluid Mastic Asphalt mixture refers to a skeleton-ultra-dense asphalt mixture with virtually zero internal voids, formed by highly fluid mastic filling the voids of aggregates through self-flow or assisted compaction techniques such as vibration. The tensile deformability of Fluid Mastic Asphalt mixture significantly enhanced while ensuring resistance to rutting, thereby markedly improving their resistance to reflective and fatigue cracking. This improvement holds promise for addressing pavement distresses such as reflective cracking and fatigue cracking, thereby improving pavement durability. In this study, nine Fluid Mastic Asphalt mixtures with a wide range of asphalt contents (asphalt-aggregate ratio from 6.3 to 10.5%) were designed. The effects of asphalt-aggregate ratio, filler-asphalt ratio, and mastic content on the mechanical properties of Fluid Mastic Asphalt mixture—including strength, deformability, and resilience in both tensile and compressive directions were investigated through compressive strength tests, compressive resilient modulus tests, and self-designed tensile strength and tensile resilient modulus tests. The results demonstrate that Fluid Mastic Asphalt mixture exhibits exceptional deformation performance, particularly in tensile deformation. Compared to conventional mixtures, Fluid Mastic Asphalt mixture achieves maximum enhancements of 340% in tensile deformability and 140% in compressive deformability, along with 500% and 130% improvements in tensile and compressive resilience respectively, while maintaining comparable resilience ratios. These findings confirm Fluid Mastic Asphalt mixture’s superior coordinated deformation characteristics. Notably, Fluid Mastic Asphalt mixture displays greater tension-compression disparity and a broader adjustable range of tensile deformation than conventional mixtures, providing greater flexibility in deformation-oriented design. The filler-asphalt ratio exerts significantly greater influence on tensile deformation properties than does the mastic content. Therefore, reducing the filler-asphalt ratio (rather than increasing mastic content) is recommended when designing the optimal asphalt-aggregate ratio to improve mixture deformation properties. A predictive model for Fluid Mastic Asphalt mixture deformation properties was developed, providing a quantitative basis for deformation-oriented mix design.