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<p>The global pavement sector is facing a critical lack of natural aggregates. In response to this concern, this study examines the feasibility of combining reclaimed asphalt pavement (RAP) with sulfur-extended asphalt (SEA) for paving non-traffic areas of Saudi Arabia’s gas plant facilities. The study employs the Marshall mix method to design a mixture containing 30% sulfur as a partial replacement for bitumen and over 68% milled RAP aggregates. It determines the mixture’s performance by conducting mechanical tests, including stiffness modulus and indirect tensile strength, as well as field loading evaluations. The RAP-SEA mixture exhibited satisfactory structural integrity in terms of rutting and fatigue resistance when exposed to a load of up to 55 tons. Furthermore, economic analysis revealed a cost savings of 12.3% and 14.1% for the binder and wearing courses, respectively. Generally, the results confirmed the technical and financial viability of using RAP-SEA mixtures for sustainable pavements in industrial non-traffic applications.</p>

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The Effectiveness of RAP-SEA Asphalt Mixtures for Non-Traffic Areas in Saudi Arabia’s Gas Plant Facilities

  • 期刊论文

  • 发表日期：

    2026年3月4日

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  • Mohammad Fuad Hifnawi,
  • Nur Izzi Md Yusoff,
  • Shabir Hussain Khahro,
  • Muhamad Razuhanafi Mat Yazid,
  • Mohab Yaser Alamawi,
  • Abdalrhman Milad,
  • Abdur Rahim

摘要

The global pavement sector is facing a critical lack of natural aggregates. In response to this concern, this study examines the feasibility of combining reclaimed asphalt pavement (RAP) with sulfur-extended asphalt (SEA) for paving non-traffic areas of Saudi Arabia’s gas plant facilities. The study employs the Marshall mix method to design a mixture containing 30% sulfur as a partial replacement for bitumen and over 68% milled RAP aggregates. It determines the mixture’s performance by conducting mechanical tests, including stiffness modulus and indirect tensile strength, as well as field loading evaluations. The RAP-SEA mixture exhibited satisfactory structural integrity in terms of rutting and fatigue resistance when exposed to a load of up to 55 tons. Furthermore, economic analysis revealed a cost savings of 12.3% and 14.1% for the binder and wearing courses, respectively. Generally, the results confirmed the technical and financial viability of using RAP-SEA mixtures for sustainable pavements in industrial non-traffic applications.