Nano-tailored multi-functional cementitious composites

Öztürk, Oğuzhan; Yıldırım, Gürkan; Keskin, Ülkü Sultan; Siad, Hocine; Şahmaran, Mustafa

doi:10.1016/j.compositesb.2019.107670

Cited by 82 publications

(13 citation statements)

References 37 publications

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“…Through autogenous self-healing, conventional ECCs are capable of self-healing their microcracks with widths up to 150 μm. 69,70 It was shown in a recent study that 71 the level (i.e., width) of self-healable microcrack width can be increased up to 400 μm and self-healing period can be shortened significantly in the presence of different nanomaterials. Similar to the literature findings, it is very likely that in the presence of different nanocalcite inclusions, fast and effective closure of microcracks through autogenous self-healing is possible (thanks to seeding effect and further reactions of nanocalcite), which ultimately helps in reducing the widths of microcracks (even completely closing them) and improving transport/ durability properties of ECCs developed in the current work, on top of the already-improved mechanical properties.…”

Section: Load Versus Mid-span Deflection Curvesmentioning

confidence: 99%

Effect of different nanosized limestone formations on fiber‐matrix interface properties of engineered cementitious composites

Demirhan

2022

Structural Concrete

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Eight different ECC mixtures were produced by the utilization of three types of nanosized limestone formations as uncoated nanosized calcite (UNC), nano-CaCO 3 (NCC), and coated nanosized calcite (CNC) and also two aggregate to binder volume fractions (A/B) of 0.36 and 0.45. Mechanical properties in terms of compressive strength and flexural characteristics (flexural strength, mid-span beam deflection, and flexural toughness) were investigated at the curing ages of 7, 28, and 90 days. It was revealed that ECC mixtures modified by nanomaterials exhibited better mechanical and flexural properties regardless of curing age and type of nanosized limestone formation. ECC mixtures modified by UNC showed better contributions. Both parameters, namely curing ECC samples in air conditions and utilization of low water to binder ratio in the production of ECC mixtures, were seen as key-determinant factors through reported results. Thus, these two variables drive the nanosized limestone formations to behave mainly as a filler material instead of exhibiting the expected mechanism.

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Section: Load Versus Mid-span Deflection Curvesmentioning

confidence: 99%

Effect of different nanosized limestone formations on fiber‐matrix interface properties of engineered cementitious composites

Demirhan

2022

Structural Concrete

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“…Final results showed that samples with 0.5 wt.% of CNTs recovered up to 5% of flexural strength, which proved self-healing ability to some extent. Öztürk et al [ 106 ] tested the self-healing abilities of concrete specimens with PVA fibers, nanosilica and 0.55 wt.% of CNTs. Healing efficiency has been evaluated based on the comparison of electrical resistance of pre-cracked and healthy specimens as well as visual and SEM inspection.…”

Section: Applications Of Cementitious Nanocompositesmentioning

confidence: 99%

Recent Advancements in Carbon Nano-Infused Cementitious Composites

2021

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A rising demand for efficient functional materials brings forth research challenges regarding improvements in existing materials. Carbon infused cementitious composites, regardless of being an important research topic worldwide, still present many questions concerning their functionality and properties. The paper aims to highlight the most important materials used for cementitious composites, their properties, and their uses while also including the most relevant of the latest research in that area.

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“…Similar to mechanical properties, the corrosion resistance and electrical conductivity of cement-matrix composites have also indicated good results through the introduction carbon nanomaterials [14][15][16][17][18][19][20]. Several studies in the literature have shown that both GO and CNTs can effectively improve the mechanical properties (e.g., strength) and durability of cementitious composites-however they have adverse effects on the workability aspects [20,21].…”

Section: Introductionmentioning

confidence: 96%

Modification of cementitious composites with graphene oxide and carbon nanotubes

2020

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Both graphene oxide (GO) and carbon nanotubes (CNTs) are carbon-based nanomaterials. Due to their favorable dispersibility in water and excellent mechanical properties, they are potential additives for use as reinforcements in cementitious composites. In this laboratory study, GO and CNTs were simultaneously used as additives to improve the mechanical properties (e.g., compressive strength) and durability (e.g., frost resistance, water impermeability) of cementitious composites. To maintain and optimize the mortar fluidity, fly ash (20% by the mass of the cementitious materials) was also added into the cementitious composite. Based on the laboratory test results, the compressive strength of the cementitious composite was maximized to 43.50 MPa with an optimal dosage of 0.08% GO, by weight of the total mixture. Addition of 0.04% GO (by total mixture weight) and higher dosages of up to 0.08% exhibited a strengthening effect on the cement composites due to the simultaneous bridging effect of 0.15% CNTs and the nucleation effect of GO. Furthermore, the addition of GO and CNTs contributed to improving the freeze-thawing resistance and impermeability of the cementitious composites. Overall, the study results indicated that the addition of GO and CNTs could potentially improve the mechanical properties and durability of cementitious composites, which could be very beneficial for various industrial applications such as concrete roads or building constructions.

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Nano-tailored multi-functional cementitious composites

Cited by 82 publications

References 37 publications

Effect of different nanosized limestone formations on fiber‐matrix interface properties of engineered cementitious composites

Effect of different nanosized limestone formations on fiber‐matrix interface properties of engineered cementitious composites

Recent Advancements in Carbon Nano-Infused Cementitious Composites

Modification of cementitious composites with graphene oxide and carbon nanotubes

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