PERTANIKA JOURNAL OF SCIENCE AND TECHNOLOGY

Plentiful modern buildings in urban and rural zones, especially buildings constructed from reinforced concrete (RC) materials, were exposed to severe defects such as spalling and delamination as the years progressed. The most used method to repair damages on existing RC is through the use of shotcrete cement grout or heavy-duty structure tape retrofits. These methods involved multiple manpower, modern equipment and a longer time of structural healing, which led to a higher cost of maintenance. Therefore, the application of self-healing microcapsules within the RC structures is one of the solutions to support the rehabilitation of cementitious-based products by developing a building with self-healing properties. This research investigates the concrete’s self-healing performances subjected to low velocity impact using large (L) and small (S) self-healing microcapsules measured at 70 mm × 10 mm and 70 mm × 5 mm. The positions (Point 1, 2 and 3) of the microcapsule in the concrete were placed based on the simulated results of severe cracks on the impacted control concrete sample from the ANSYS explicit dynamics. Post impact results show that the concrete with L microcapsules had 68.2% more self-healing efficiency compared to S microcapsules, showing it had better damage recovery.