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Feasibility study of smart functional strain-hardening cementitious composites: Self-sensing model and experimental performance.
- Source :
-
Construction & Building Materials . Jul2024, Vol. 436, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- This work aims to conduct the feasibility study of a smart functional strain-hardening cementitious composites (SHCC) which integrates the strengthening function and self-sensing function with both experimental testing and theoretical model. Specifically, the smart functional SHCC were experimentally explored in terms of self-sensing property, electrical conductivity, microstructure, mechanical properties, and workability. The effects of test parameters such as the type of conductive material (i.e., multi-walled carbon nanotubes (MWCNT), carbon fibers, aluminum powder, and copper powder), conductive material dosage, and water-to-binder ratio were studied comprehensively. The results showed that smart functional SHCC fabricated with MWCNT and carbon fibers showed better self-sensing capacity, conductivity, mechanical properties and workability compared with those fabricated with copper powder and aluminum powder. More importantly, a bi-linear mechanical-electrical model considering fracture damage was proposed to predict the relationship between mechanical stress and electrical signal, and predict the crack initiation and internal damage. This work can promote a more comprehensive understanding for developing smart functional SHCC to achieve integrated self-sensing and strengthening functions. • A smart functional strain-hardening cementitious composites (SHCC) that can achieve both "strengthening function" and "self-sensing monitoring capability" was developed. • The feasibility of the integrated method of strengthening and self-sensing monitoring based on smart functional (SHCC) for coastal bridges was verified. • A bi-linear mechanical-electrical model considering fracture damage was proposed, which can predict the relationship between mechanical stress and electrical signal, and the crack initiation and internal damage. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09500618
- Volume :
- 436
- Database :
- Academic Search Index
- Journal :
- Construction & Building Materials
- Publication Type :
- Academic Journal
- Accession number :
- 177905576
- Full Text :
- https://doi.org/10.1016/j.conbuildmat.2024.136850