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Similar to engineering materials used in civil engineering,aerospace engineering and other applications,an asphalt concrete also suffers from fatigue cracking due to a cyclic loading conditions on the road,which results in a decrease of the stiffness and the strength. The self healing capability has been investigated widely due to its unique contribution to the recovery of the stiffness and the strength from cracking and then to extend the service life of asphalt pavements. In this paper,general concepts of self healing and self healing asphalt concrete were introduced. Then,the parameters that influence the self healing capability of the asphalt binder and asphalt concrete were discussed. Inspired from other self healing materials,the possibilities of applying microcapsule self healing system in asphalt concrete were investigated in detail.
Similar to engineering materials used in civil engineering, aerospace engineering and other applications, an asphalt concrete also suffers from fatigue cracking to a cyclic loading conditions on the road, which results in a decrease of the stiffness and the strength. The self healing capability has been investigated widely due to its unique contribution to the recovery of the stiffness and the strength from cracking and then to extend the service life of asphalt pavements. In this paper, general concepts of self healing and self healing asphalt concrete were introduced. Then, the parameters that influence the self healing capability of the asphalt binder and asphalt concrete were discussed. Inspired from other self healing materials, the possibilities of applying microcapsule self healing system in asphalt concrete were investigated in detail.