Applicability of cementitious capsules in concrete production: initial assessment on capsule robustness, mechanical and self-sealing properties of concrete

The use of macrocapsules in self-healing applications offers a potential benefit by carrying larger amount healing agent comparison with microcapsules. However, the application is still limited to paste and mortar levels on lab-scale. This due concern that most capsules might be broken when mixed concrete components. In this study, cementitious tubular were used they considered as partial replacement coarse aggregates (2 vol% gravel). have dimension 54 mm 9 length outer diameter, respectively. A water-repellent (WRA) was entrapped proposed seal crack. Initial results revealed high survivability during mixing: 100% survival ratio tested drum mixer 70–95% planetary mixer. mechanical self-sealing properties containing embedded evaluated. With addition capsules, around 8% reduction compressive strength noticed, but no further effect splitting tensile detected compared without capsules. Ultrasonic pulse velocity (UPV) tests confirmed presence also did not significantly affect compactness hardened concrete. Furthermore, able break crack introduced it found 90% sealing efficiency achieved capsule-based result successful release into