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Asphalt concrete is mainly used for the surfacing layer of road pavements in Nigeria. It has been reported to fail prematurely, and the early failure has been attributed to the fact that the road is the main transportation mode in Nigeria, thus exerting pressure on the transportation facilities. It is important to evaluate the properties of stone mastic asphalt as an alternative pavement surfacing material for flexible pavement in Nigeria to address the problem. Therefore, this study involves a comparative analysis of the conventional asphalt concrete and stone mastic asphalt using the Marshall mix design, the main method used to design bituminous mixtures in Nigeria. The asphalt concrete was prepared following the specifications in the General Specifications, Road and Bridges prepared by the Federal Ministry of Works and Housing, Nigeria, while the stone mastic asphalt was prepared following the British standard. The aggregates used were examined, and the aggregate abrasion value (AAV), aggregate impact value (AIV) and aggregate crushing value (ACV) were found to be within the values specified. The 60/70 penetration grade bitumen commonly used in Nigeria was used for both mixtures. Marshall test was carried out on the asphalt concrete and stone mastic asphalt, and the stability, flow, density, air voids, voids in mineral aggregates and voids filled with bitumen were determined. The results indicated that the values obtained were within the acceptable limits in the specifications. Also, it was found that the stone mastic asphalt has slightly higher stability, indicating its better fatigue resistance compared to conventional asphalt concrete. Again, the stone mastic asphalt has a lower flow value, implying it possesses better resistance to permanent deformation than asphalt concrete. However, further investigation, such as the skid resistance test, indirect tensile fatigue test (ITFT), indirect tensile stiffness modulus (ITSM), and repeated load axial test (RLAT) will be carried out to establish the performance of the stone mastic asphalt.

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Evaluation of Marshall Properties of Asphalt Concrete and Stone Mastic Asphalt for Nigerian Roads

  • 会议论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年

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  • Olumide Moses Ogundipe,
  • James Olugbenga Aribisala,
  • Daniel Oluwafemi Oguntayo

摘要

Asphalt concrete is mainly used for the surfacing layer of road pavements in Nigeria. It has been reported to fail prematurely, and the early failure has been attributed to the fact that the road is the main transportation mode in Nigeria, thus exerting pressure on the transportation facilities. It is important to evaluate the properties of stone mastic asphalt as an alternative pavement surfacing material for flexible pavement in Nigeria to address the problem. Therefore, this study involves a comparative analysis of the conventional asphalt concrete and stone mastic asphalt using the Marshall mix design, the main method used to design bituminous mixtures in Nigeria. The asphalt concrete was prepared following the specifications in the General Specifications, Road and Bridges prepared by the Federal Ministry of Works and Housing, Nigeria, while the stone mastic asphalt was prepared following the British standard. The aggregates used were examined, and the aggregate abrasion value (AAV), aggregate impact value (AIV) and aggregate crushing value (ACV) were found to be within the values specified. The 60/70 penetration grade bitumen commonly used in Nigeria was used for both mixtures. Marshall test was carried out on the asphalt concrete and stone mastic asphalt, and the stability, flow, density, air voids, voids in mineral aggregates and voids filled with bitumen were determined. The results indicated that the values obtained were within the acceptable limits in the specifications. Also, it was found that the stone mastic asphalt has slightly higher stability, indicating its better fatigue resistance compared to conventional asphalt concrete. Again, the stone mastic asphalt has a lower flow value, implying it possesses better resistance to permanent deformation than asphalt concrete. However, further investigation, such as the skid resistance test, indirect tensile fatigue test (ITFT), indirect tensile stiffness modulus (ITSM), and repeated load axial test (RLAT) will be carried out to establish the performance of the stone mastic asphalt.