The first microcapsule-based self-healing cement–bentonite cut-off wall materials
نویسندگان
چکیده
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.
منابع مشابه
Evaluation of a Microcapsule Based Self-healing System for Cementitious Materials
An international cooperation research project has been financially supported by China Nature Science Foundation, which consists of three relatively independent, but strategically integrated research sub-programs, aiming at the formation of a selfhealing system based on the microcapsule principle for the cementitious composites. In this paper, a self-healing system triggered by physical process ...
متن کاملPolydimethylsiloxane-Based Self-Healing Materials
Self-healing represents a new paradigm for active and responsive materials. As first demonstrated by White et al., and subsequently in additional publications, polymer composites can be engineered to chemically self-heal. However, the chemistry of previous systems possesses inherent shortcomings due to the potential side reactions with the polymer matrix and air. Here we present a new, chemical...
متن کاملMicromechanical Properties of a New Polymeric Microcapsule for Self-Healing Cementitious Materials
Self-healing cementitious materials containing a microencapsulated healing agent are appealing due to their great application potential in improving the serviceability and durability of concrete structures. In this study, poly(phenol-formaldehyde) (PF) microcapsules that aim to provide a self-healing function for cementitious materials were prepared by an in situ polymerization reaction. Size g...
متن کاملLow-Temperature Self-Healing of a Microcapsule-Type Protective Coating
Low-temperature self-healing capabilities are essential for self-healing materials exposed to cold environments. Although low-temperature self-healing concepts have been proposed, there has been no report of a microcapsule-type low-temperature self-healing system wherein the healing ability was demonstrated at low temperature. In this work, low-temperature self-healing of a microcapsule-type pr...
متن کاملMicrocapsule induced toughening in a self-healing polymer composite
Microencapsulated dicyclopentadiene (DCPD) healing agent and Grubbs’ Ru catalyst are incorporated into an epoxy matrix to produce a polymer composite capable of self-healing. The fracture toughness and healing efficiency of this composite are measured using a tapered double-cantilever beam (TDCB) specimen. Both the virgin and healed fracture toughness depend strongly on the size and concentrati...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geotechnique
سال: 2023
ISSN: ['0016-8505', '1751-7656']
DOI: https://doi.org/10.1680/jgeot.19.p.316