The first microcapsule-based self-healing cement–bentonite cut-off wall materials

Despite the extensive use of cement–bentonite in contaminated land containment applications, there are still many challenges related to durability. The development self-healing materials could provide more resilient, sustainable and reliable cut-off walls with significantly enhanced durability, reduced maintenance costs, safety protection against sudden or undetected failure. objective this study was develop wall incorporating microcapsules. Microencapsulated sodium silicate, as a healing agent, would be released into cracks when microcapsules rupture result any damage incurred, react matrix fill heal cracks. Novel switchable mechanical properties developed for cement applications were employed here. results demonstrated average crack mouth recovered permeability performance provided by compared control samples. X-ray microcomputed tomography scanning electron microscopy applied investigate process microcapsule-containing system. microstructural analysis confirmed survivability, uniform dispersion crack-triggered microcapsules, well release agent generation hydration products within These promising application microcapsule-based system materials.