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<p>Dynamic thermal mechanical analysis was used to evaluate the viscoelasticity of asphalt. The parameters included the energy storage modulus (<i>E</i>), the loss modulus (<i>E</i>′), and the loss tangent (tan<i>δ</i>). The impact of three kinds of particles containing CaCO<sub>3</sub> with different size and structure on the mechanical properties was also measured. The addition of limestone increases the glass transition temperature, while nano-CaCO<sub>3</sub>@SiO<sub>2</sub> decreases the glass transition temperature. Nano-CaCO<sub>3</sub> has a negligible effect on the glass transition temperature. The particle size of the limestone is 0.075 mm, which is a material at the micrometer level. During the heating process, it hinders the molecular movement and makes the material harder. Thus the glass transition temperature is relatively high.</p>

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Effect of Nano-CaCO3@SiO2 on Viscoelasticity of Asphalt

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • Yu Dai,
  • Peng Liu,
  • Chuanlin Hu,
  • Qunce Zhou

摘要

Dynamic thermal mechanical analysis was used to evaluate the viscoelasticity of asphalt. The parameters included the energy storage modulus (E), the loss modulus (E′), and the loss tangent (tanδ). The impact of three kinds of particles containing CaCO3 with different size and structure on the mechanical properties was also measured. The addition of limestone increases the glass transition temperature, while nano-CaCO3@SiO2 decreases the glass transition temperature. Nano-CaCO3 has a negligible effect on the glass transition temperature. The particle size of the limestone is 0.075 mm, which is a material at the micrometer level. During the heating process, it hinders the molecular movement and makes the material harder. Thus the glass transition temperature is relatively high.