Self-diagnostic lime-pozzolan-cement restoration nanocomposites: Effect of graphene modification and cyclic loading level under compression

Dimou, Angeliki-Eirini; Asimakopoulos, Georgios; Karatasios, Ioannis; Gournis, Dimitrios; Metaxa, Zoi S.; Kourkoulis, Stavros K.; Alexopoulos, Nikolaos D.

doi:10.1016/j.dibe.2022.100068

Cited by 6 publications

(6 citation statements)

References 24 publications

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“…In contrast with the two former graphene nanostructures, GCOOH pastes do not show enhanced piezoresistive response, but the percentage of resistance change remains practically constant for all loading levels. GCOOH displays a different behavior in the case of blended lime-cement binders, with outstanding piezoresistive response, as shown in previous work of the authors [ 26 ].…”

Section: Resultssupporting

confidence: 52%

“…The impedance spectra of the dispersions were interpreted via their respective Bode Plots. The respective Bode plots for all graphene-based nanostructures can be seen in [ 25 , 26 ], while similar approach was followed for the MWCNTs nanostructures. Figure 5 and Figure 6 display the Bode plots for the two different types of MWCNTs dispersion investigations and for four different concentrations per type.…”

Section: Resultsmentioning

confidence: 99%

“…As noticed in relevant research articles, e.g., [ 25 , 26 ], graphene oxide dispersions exhibit lower impedance values, since it contains many different conductive functional groups. In contrast, rGO dispersions exhibit the highest impedance values in comparison with the other nanostructures.…”

Section: Resultsmentioning

confidence: 99%

“…Likewise, modification of MWCNTs improves their compatibility and stability, enhancing the potential of MWCNTs in sensing applications, e.g., [ 24 ]. For each nanostructure, aqueous dispersions were produced to find the optimal combination of ultrasonic energy and nano-reinforcement concentration (as wt.% of the binder), as described in previous works of the authors, e.g., [ 25 , 26 ]. The dispersion medium in the present investigation was bottled water (Epirotic Bottling Industry S.A.—VIKOS S.A.).…”

Section: Methodsmentioning

confidence: 99%

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Piezoresistive Properties of Natural Hydraulic Lime Binary Pastes with Incorporated Carbon-Based Nanomaterials under Cyclic Compressive Loadings

et al. 2022

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Natural Hydraulic Limes (NHL) are extensively used for the restoration of Monuments of Cultural Heritage, often combined with pozzolanic materials, such as natural pozzolans and metakaolin etc. In the present study, five (5) different cases of binary lime-based pastes composed of a specific type of NHL (NHL5) and metakaolin as pozzolanic addition were examined, that were reinforced with carbon nanostructures, namely graphene and carbon nanotubes. For the first time in restoration mortars, the incorporation of carbon nanostructures was investigated, aiming to produce materials with adequate piezoresistive response, so that they have the potential to be exploited for in situ structural health monitoring. The compressive strength, flexural strength, electrical resistance and piezoresistive response of the composite pastes was examined. The results showed that all modified carbon nanostructures lead to a significant reduction in electrical resistance. The pastes reinforced with 2D nanostructures (graphene family) displayed up to 30% increase in compressive strength and the pastes reinforced with 1D nanostructures (carbon nanotubes) displayed enhanced flexural strength (up to 100% increase). Piezoresistivity was attained for almost all investigated pastes, nevertheless the graphene oxide (GO) was considered as optimal reinforcement as the sensing ability of such pastes was found to be almost proportional to the applied compressive load level.

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Section: Resultssupporting

confidence: 52%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Piezoresistive Properties of Natural Hydraulic Lime Binary Pastes with Incorporated Carbon-Based Nanomaterials under Cyclic Compressive Loadings

et al. 2022

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“…Additionally, the flexural strength of the pastes increased with the addition of GO and rGO, respectively 14% and 7%. [ 161 ] Further work needs to focus on the design of new approaches that take into consideration the complexity of the building materials, GRMs, and their intricated interactions.…”

Section: Applications In Cultural Heritagementioning

confidence: 99%

Present Status and Perspectives of Graphene and Graphene‐related Materials in Cultural Heritage

Galvagno,

Tartaglia,

Stratigaki

et al. 2024

Adv Funct Materials

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Cultural heritage faces recurring degradation processes and natural aging phenomena, demanding the envisioning of innovative preservation solutions inspired by cutting‐edge scientific research. Over extended time frames, current preservation strategies often prove inadequate in preserving the different constituent materials of cultural assets, which are thus threatened by their inherent fragility and by the complex interactions with the surrounding environment. The distinctive properties of graphene and graphene‐related materials (GRMs) now offer unexplored opportunities in the field of cultural heritage, addressing various forms of deterioration phenomena. This work critically analyzes early‐stage literature on the use of graphene and GRMs. Strengths, weaknesses, and limitations in anti‐corrosion, anti‐fading, and consolidation properties of graphene and GRMs are thoroughly investigated, along with their possible applications in smart sensors to monitor the state of health of endangered artifacts. The aim is to elucidate how specific characteristics of graphene and GRMs can be applied to the conservation, diagnostics, and monitoring of artistic and archaeological assets. Future perspectives in the design of stable, long‐lasting, and compatible graphene‐based solutions for cultural heritage protection are highlighted, providing a detailed discussion on potentials and pitfalls.

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Nano-reinforced Ternary Lime-Based Composites for Structural Health Monitoring of Cultural Heritage Monuments

Stogia,

Kourkoulis,

Alexopoulos

2023

Advanced Nondestructive and Structural Techniques for Diagnosis, Redesign and Health Monitoring for the Preservation of Cultura

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Self-diagnostic lime-pozzolan-cement restoration nanocomposites: Effect of graphene modification and cyclic loading level under compression

Cited by 6 publications

References 24 publications

Piezoresistive Properties of Natural Hydraulic Lime Binary Pastes with Incorporated Carbon-Based Nanomaterials under Cyclic Compressive Loadings

Piezoresistive Properties of Natural Hydraulic Lime Binary Pastes with Incorporated Carbon-Based Nanomaterials under Cyclic Compressive Loadings

Present Status and Perspectives of Graphene and Graphene‐related Materials in Cultural Heritage

Nano-reinforced Ternary Lime-Based Composites for Structural Health Monitoring of Cultural Heritage Monuments

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