USE OF INTERNAL RESERVOIR FOR CONCRETE SELF-HEALING

Abstract

Autogenous healing, an inherent ability of concrete for self-repair, can be enhanced through the incorporation of internal curing agents acting as reservoirs. This research investigates the effectiveness of specific internal curing agents, superabsorbent polymer (SAP) and lightweight aggregates (LWA) and cenosphere. The study examined the moisture kinetics of SAP and evaluated the mechanical properties of concrete with internal reservoir. To assess self-healing performance, specimens are deliberately cracked and subjected to dry and dry-wet conditions over different periods. Additionally, X-ray diffraction analysis (XRD) and thermogravimetric analysis (TGA) are employed to analyze new products formed on cracked surfaces. The findings highlight the significant improvement in autogenous healing and the promotion of further hydration resulting from the inclusion of internal curing agents. This investigation provides valuable insights into the potential of internal reservoirs to facilitate self-repair processes in concrete structures.