Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.13091/1165
Title: Nano-tailored multi-functional cementitious composites
Authors: Öztürk, Oğuzhan
Yıldırım, Gürkan
Keskin, Ülkü Sultan
Siad, Hocine
Şahmaran, Mustafa
Keywords: Engineered Cementitious Composites (Eccs)
Self-Healing
Self-Sensing
Nano-Silica (Ns)
Carbon Nanotubes (Cnt)
Self-Healing Capability
Electrical-Properties
High Volumes
Fly-Ash
Transport
Permeability
Performance
Durability
Strength
Concrete
Issue Date: 2020
Publisher: ELSEVIER SCI LTD
Abstract: This paper explores the effects of single and binary use of nano-additions on the self-sensing and self-healing efficiencies of cementitious composites in achieving a material that combines high mechanical and multifunctional performances. The researchers studied three nano-tailored cementitious compositions incorporating nano-silica (NS), multi-walled carbon nanotubes (CNT) and binary NS/CNT, as well as control composites prepared without nano-additions. The study included compressive strength testing on sound specimens and an evaluation of combined self-sensing/self-healing capabilities with electrical resistivity (ER) measurements conducted before and after preloading and during the self-healing recovery stage. Recovery rates were also evaluated via crack width measurements recorded by video microscope and compared to ER testing results. To account for different self-healing products, microstructural characterization was performed on healed cracks using scanning electron microscopy coupled with EDX (SEM/EDX) and thermo-gravimetric (TG/DTG) analyses. Results show that while the single use of CNT can promote self-sensing and self-healing properties, using binary NS/CNT can significantly enhance these performances. The density and amounts of C-S-H and CaCO3 in healed cracks increased with the addition of nano-materials, especially for the binary NS/CNT.
URI: https://doi.org/10.1016/j.compositesb.2019.107670
https://hdl.handle.net/20.500.13091/1165
ISSN: 1359-8368
1879-1069
Appears in Collections:Mühendislik ve Doğa Bilimleri Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections

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