Scholarlink

<p>Premature distress in flexible pavements under heavy traffic, particularly in the form of rutting, fatigue cracking, and moisture-induced damage, remains a major challenge in tropical and high-temperature regions. To address these limitations, this study investigates the performance of ethylene–vinyl acetate (EVA)–modified VG-40 bitumen for durable and fatigue-resistant pavement applications. VG-40 binder was modified with varying EVA contents (0–10%), and Dense Bituminous Macadam (DBM) and Bituminous Concrete (BC) mixes were prepared using optimum binder contents of 5.2% and 5.5%, respectively. A comprehensive experimental program was conducted, including conventional binder tests, Marshall stability, indirect tensile strength (ITS), rutting resistance, moisture susceptibility (RMS and TSR), resilient modulus, and Fourier Transform Infrared (FTIR) spectroscopy to evaluate physicochemical interactions. The results demonstrated that 4% EVA provides the optimum balance between stiffness and flexibility. At the binder level, penetration decreased by 18.75%, softening point increased by 12%, and viscosity improved, indicating enhanced high-temperature performance. At the mixture level, Marshall Stability increased by 81.6% and 69.6% for DBM and BC, respectively, while Marshall Quotient and fatigue-related parameters showed substantial improvement. ITS results confirmed enhanced fatigue resistance, with resilient modulus values of 3232.22&#xa0;kPa for DBM and 3048.9&#xa0;kPa for BC. Both mixes satisfied moisture resistance criteria, with RMS and TSR values exceeding 80%. FTIR analysis verified effective polymer–bitumen interaction. Overall, 4% EVA-modified VG-40 demonstrates superior mechanical performance, durability, and suitability for high-traffic pavement applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Comprehensive evaluation of mechanical, fatigue, and durability performance of EVA-modified VG-40 asphalt mixes under heavy traffic

  • 期刊论文

  • 发表日期：

    2026年4月1日

查看全文
  • Arvind Singh Gaur,
  • Imran Ahmad Khan

摘要

Premature distress in flexible pavements under heavy traffic, particularly in the form of rutting, fatigue cracking, and moisture-induced damage, remains a major challenge in tropical and high-temperature regions. To address these limitations, this study investigates the performance of ethylene–vinyl acetate (EVA)–modified VG-40 bitumen for durable and fatigue-resistant pavement applications. VG-40 binder was modified with varying EVA contents (0–10%), and Dense Bituminous Macadam (DBM) and Bituminous Concrete (BC) mixes were prepared using optimum binder contents of 5.2% and 5.5%, respectively. A comprehensive experimental program was conducted, including conventional binder tests, Marshall stability, indirect tensile strength (ITS), rutting resistance, moisture susceptibility (RMS and TSR), resilient modulus, and Fourier Transform Infrared (FTIR) spectroscopy to evaluate physicochemical interactions. The results demonstrated that 4% EVA provides the optimum balance between stiffness and flexibility. At the binder level, penetration decreased by 18.75%, softening point increased by 12%, and viscosity improved, indicating enhanced high-temperature performance. At the mixture level, Marshall Stability increased by 81.6% and 69.6% for DBM and BC, respectively, while Marshall Quotient and fatigue-related parameters showed substantial improvement. ITS results confirmed enhanced fatigue resistance, with resilient modulus values of 3232.22 kPa for DBM and 3048.9 kPa for BC. Both mixes satisfied moisture resistance criteria, with RMS and TSR values exceeding 80%. FTIR analysis verified effective polymer–bitumen interaction. Overall, 4% EVA-modified VG-40 demonstrates superior mechanical performance, durability, and suitability for high-traffic pavement applications.