Strain and damage sensing properties on multifunctional cement composites with CNF admixture

Galao, Ó.; Baeza, F. Javier; Zornoza, E.; Garcés, P.

doi:10.1016/j.cemconcomp.2013.11.009

Cited by 238 publications

(139 citation statements)

References 36 publications

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“…To this end, paste specimens were cast in 4ˆ4ˆ16 cm 3 molds and moist-cured at 95%-98% RH for 14 days. The experimental details of the measurements can be found elsewhere [39]. The average obtained resistivity was 1.5 Ω¨m.…”

Section: Common Experimental Details Of the Electrochemical Tests In mentioning

confidence: 99%

“…To this end, paste specimens were cast in 4 × 4 × 16 cm 3 molds and moist-cured at 95%-98% RH for 14 days. The experimental details of the measurements can be found elsewhere [39]. The average obtained resistivity was 1.5 Ω m. The measurements of steel corrosion potential (Ecorr) and all the single electrode potentials, were performed using Ag-AgCl reference electrodes.…”

Section: Common Experimental Details Of the Electrochemical Tests In mentioning

confidence: 99%

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Graphite–Cement Paste: A New Coating of Reinforced Concrete Structural Elements for the Application of Electrochemical Anti-Corrosion Treatments

2016

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This paper reviews research carried out towards the development of a novel conductive coating for reinforced concrete structures in order to enable the application of electrochemical anti-corrosion treatments. The coating is composed of a hardened paste containing graphite powder and cement. The applied techniques were electrochemical chloride extraction (ECE), cathodic protection (CP), and cathodic prevention, as well as combined treatments such as ECE-CP. This research has demonstrated their efficiency when using the new conductive coating as an anode system. The influence of the shape of the structural elements on the performance of the electrochemical treatments was also studied. Several characteristics of the coating have been determined, such as conductivity, durability, adhesion to the concrete surfaces, and ease of application. The results demonstrate the adequacy of using this coating as the anode for anti-corrosion treatments on reinforced concrete structural elements of different shapes, for the purpose of extending service life.

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Section: Common Experimental Details Of the Electrochemical Tests In mentioning

confidence: 99%

Section: Common Experimental Details Of the Electrochemical Tests In mentioning

confidence: 99%

Graphite–Cement Paste: A New Coating of Reinforced Concrete Structural Elements for the Application of Electrochemical Anti-Corrosion Treatments

2016

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“…For this purpose, paste specimens were cast in 4 x 4 x 16 cm 3 molds, and moist-cured for 14 days in the same above mentioned curing chamber. The experimental details of the measurements can be found elsewhere [23]. The average value of resistivity obtained was 1.5 Ω m.…”

Section: Concretementioning

confidence: 99%

Influence of different ways of chloride contamination on the efficiency of cathodic protection applied on structural reinforced concrete elements

Calero

Climent

Terradillos

2017

Journal of Electroanalytical Chemistry

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Cathodic protection is a method to protect reinforced concrete structures located in saline environments against corrosion effect produced by Cl -penetration. But there are significant differences among these aggressive environments. The aim of this article is to show how different ways of saline contamination can affect the efficiency of cathodic protection. For this research, a series of laboratory specimens representing structural elements were subjected to two versions of cathodic protection (cathodic protection strictly speaking, and cathodic prevention), while two different ways of saline contamination were applied (permanent immersion in a NaCl solution and periodic pouring of discrete amounts of a NaCl solution in atmospheric exposure). Depending on the saline environment, differences in the efficiency of cathodic protection were detected. Results can be useful to determine the specific features of the cathodic protection to be applied in each case, taking into account both the initial Clcontent of the structural element and the particular saline environment where it is located.

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“…This is a powerful advantage over off-the-shelf sensing technologies that are known to have limited scalability due to economic and or technical constraints [29,30]. The self-sensing ability of cement-based materials or sensors is obtained through mapping variations in strain to variations in electrical characteristics of the material such as electrical resistivity or conductivity [31][32][33][34][35][36][37][38][39]. Literature demonstrates that suitable fillers for cementitious matrices yielding self-sensing materials are carbon-based particles of short, micro or nano sizes [40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Static and Dynamic Strain Sensitivity of Smart Concrete Sensors Doped with Carbon Nanotubes for SHM of Large Structures

Meoni¹,

D’Alessandro²,

Downey³

et al. 2018

Preprint

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Abstract:The availability of new self-sensing cement-based strain sensors allows the development of dense sensor networks for Structural Health Monitoring (SHM) of reinforced concrete structures. These sensors are fabricated by doping cement-matrix materials with conductive fillers, such as Multi Walled Carbon Nanotubes (MWCNTs), and can be embedded into structural elements made of reinforced concrete prior to casting. The strain sensing principle is based on the multifunctional composites outputting a measurable change in their electrical properties when subjected to a deformation. Previous work by the authors was devoted to material fabrication, modeling and applications in SHM. In this paper, we investigate the behavior of several sensors fabricated with and without aggregates and with different MWCNTs content. The strain sensitivity of the sensors, in terms of fractional change in electrical resistivity for unit strain, as well as their linearity are investigated through experimental testing under both static and dynamically varying compressive loadings. Moreover, the responses of the sensors when subjected to destructive compressive tests are evaluated. Overall, the presented results contribute to improving the scientific knowledge on the behavior of smart concrete sensors and to furthering their understanding for SHM applications.

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Strain and damage sensing properties on multifunctional cement composites with CNF admixture

Cited by 238 publications

References 36 publications

Graphite–Cement Paste: A New Coating of Reinforced Concrete Structural Elements for the Application of Electrochemical Anti-Corrosion Treatments

Graphite–Cement Paste: A New Coating of Reinforced Concrete Structural Elements for the Application of Electrochemical Anti-Corrosion Treatments

Influence of different ways of chloride contamination on the efficiency of cathodic protection applied on structural reinforced concrete elements

An Experimental Study on Static and Dynamic Strain Sensitivity of Smart Concrete Sensors Doped with Carbon Nanotubes for SHM of Large Structures

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