Asphalt concrete is the primary material for road construction but is affected by environmental conditions and repeated loading, leading to issues like rutting, fatigue cracking, and material degradation. This study examines the mechanical properties of asphalt concrete reinforced with Metakaolin (MK), a pozzolanic material that enhances asphalt stability and reduces deterioration. Metakaolin was added at 2%, 4%, 6%, 8%, and 10% by weight of AC60/70 asphalt cement. Marshall Stability and flow tests showed that stability peaked at 4% metakaolin before declining, while flow values decreased as metakaolin content increased, aligning with asphalt concrete standards. The findings suggest that optimal metakaolin content improves mechanical properties, reduces deformation, and extends pavement life. Additionally, pozzolanic materials help lower carbon emissions, supporting sustainable pavement development. This research offers an innovative approach to improving construction materials while minimizing environmental impact.

Abstract

Asphalt concrete is the primary material for road construction but is affected by environmental conditions and repeated loading, leading to issues like rutting, fatigue cracking, and material degradation. This study examines the mechanical properties of asphalt concrete reinforced with Metakaolin (MK), a pozzolanic material that enhances asphalt stability and reduces deterioration. Metakaolin was added at 2%, 4%, 6%, 8%, and 10% by weight of AC60/70 asphalt cement. Marshall Stability and flow tests showed that stability peaked at 4% metakaolin before declining, while flow values decreased as metakaolin content increased, aligning with asphalt concrete standards. The findings suggest that optimal metakaolin content improves mechanical properties, reduces deformation, and extends pavement life. Additionally, pozzolanic materials help lower carbon emissions, supporting sustainable pavement development. This research offers an innovative approach to improving construction materials while minimizing environmental impact.