Application of Superabsorbent Polymer as Self-Healing Agent in Self-Consolidating Concrete for Mitigating Precracking Phenomenon at the Rebar–Concrete Interface

Improved autogenous healing capacity of concrete using superabsorbent polymers (SAPs) was used as an efficient approach for mitigating damage between steel rebar and self-consolidating (SCC). The results normal (NC) those SCC mixtures were compared. Two SAPs with different particle sizes chemical compositions in the experimental program. Results showed that despite greater reduction effect SAP a smaller size on compressive strength, containing this type had highest bond strength uncracked specimens, compared larger sizes, SAP-modified NC mixtures. Moreover, considerably improvement factors large crack widths (w≥0.30 mm) without polymers; almost 46%, 30%, 24% obtained average stress, residual stress SAP-containing mixtures, respectively. Furthermore, complete recovery (100% factor) mixture w=0.10 mm after 28-day period.