Critical role of carbon nanofibers in boosting C-S-H density and fracture toughness in fine recycled aggregate concrete.

ABSTRACT: This work investigates the influence of carbon nanofibers (CNFs) on densification and toughening mechanisms in fine recycled aggregate concrete (RAC). RAC is concrete produced using recycled concrete aggregates (RCA) produced from crushed old concrete. Although RCA offers a way to reduce the carbon footprint on concrete via raw resource recycling, the porosity and residual cement within RCA often lead to poor durability and performance of RAC. Prior studies have attempted to improve the properties of RAC using nanomaterials, yet a fundamental understanding of molecular mechanisms is lacking. Using novel synthesis methods and advanced nanoscale mechanical characterization methods such as scratch testing and grid nanoindentation, we investigate the influence of CNFs on toughening mechanisms

SUBMITTER: Buettner N 

PROVIDER: S-EPMC12307936 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature