Sensing accumulated cracking with smart coated and uncoated carbon based TRC

Goldfeld, Yiska; Yosef, Lidor

doi:10.1016/j.measurement.2019.04.033

Cited by 18 publications

(34 citation statements)

References 35 publications

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“…Note, however, that the width of the macro-cracks in case of coated TRC beams are also relatively small if compared to uncoated ones. The difficult in distinguishing between the electrical signals of the micro- and macro- cracked states is also reported in Goldfeld and Yosef (2019), which investigated the sensory capabilities of coated and uncoated TRC beam specimens to distinguish between accumulated cracking scenarios under mechanical loading.…”

Section: Resultsmentioning

confidence: 90%

“…The core filaments that are bonded and characterized by a homogenous cross-section reduce the degradation associated with the post-cracking phenomena of TRC elements (Aveston et al, 1971). From the sensory point of view, it was found that, in case of strain and damage sensing, the above mechanism eventually limits the monitoring capabilities of the coated carbon rovings to distinguish between micro- and macro-cracks (Goldfeld and Yosef, 2019). It is assumed that also in the current case, coating will affect the electrical signal.…”

Section: Sensory Conceptmentioning

confidence: 99%

“…The high tensile strength of the rovings and their high resistance against corrosion enable the production of thin-walled and structurally strong TRC elements. The use of electrically conductive rovings, such as carbon rovings, that are characterized by high mechanical performance enables the rovings to serve both as the main reinforcement system as well as the sensory agent for detecting mechanical loading (Christner et al, 2012; Goldfeld et al, 2016a, 2017b; Wen and Chung, 1999; Wen et al, 2000), strain (Horoschenkoff and Christner, 2012; Quadflieg et al, 2016; Teomete, 2015), cracking (Goldfeld et al, 2017a; Goldfeld and Yosef, 2019); or water infiltration (Goldfeld and Perry, 2018, 2019; Goldfeld et al, 2016b, 2016c).…”

Section: Introductionmentioning

confidence: 99%

“…It is achieved by using different binding configurations (Hegger and Voss, 2008; Peled and Bentur, 2003; Peled et al, 1999; Quadflieg et al, 2017; Stolyarov et al, 2015), applying pre-treatment procedures such as coating (Gao et al, 2004; Hegger et al, 2006), combining binding and coating (Perry et al, 2020), or by improving the penetrability of the cementitious matrix (Brockmann, 2007). However, from the sensory point of view it was found (Goldfeld and Yosef, 2019) that coating eventually limits the sensory capabilities in case of monitoring the exact structural state and the severity of cracks.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Monitoring capabilities of various smart self sensory carbon-based textiles to detect water infiltration

Perry

Dittel

Gries

et al. 2021

Journal of Intelligent Material Systems and Structures

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The study investigates the capabilities of various configurations of self-sensory carbon-based textiles to detect and distinguish between the severity of water infiltration through cracked zones along textile reinforced concrete (TRC) elements. The investigation aims to explore whether an optimal smart textile configuration can improve the structural performance while providing sensitive sensory capabilities. Such an investigation is needed for the development of intelligent TRC structures. Specifically, the study experimentally investigates the effect of two types of bindings and the effect of coating on the mutual structural-sensory performances. The sensory concept is based on changes of the electrical mechanism of two adjacent carbon rovings due to infiltration of water through cracked zones. Eight TRC beam samples were cast and mechanically loaded up to cracking. The cracked zones were monitored, and each zone was separately examined by performing a wetting event. It is demonstrated that the type of binding and coating, which significantly affect the structural response, reflect and affect the measured electrical signal. It is found that there is a tradeoff mechanism between the structural response and the sensory capabilities. While specific textile configuration improves the structural performance, it may reduce its sensory capability to distinguish between the magnitude of water infiltration.

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Section: Resultsmentioning

confidence: 90%

Section: Sensory Conceptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Monitoring capabilities of various smart self sensory carbon-based textiles to detect water infiltration

Perry

Dittel

Gries

et al. 2021

Journal of Intelligent Material Systems and Structures

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“…33 It was found that the ERC is strongly affected and reflected by the micro-structural mechanism. 16,21 The contribution of each sub-rovings in transferring the electrical current can be correlated to the strain and stress re-distribution along the roving cross section during the loading process. Goldfeld and Yosef 21 offered the GF concept to correlate between the relative ERC and the integrative strain along the roving location.…”

Section: Introductionmentioning

confidence: 99%

Smart self-sensory carbon-based textile reinforced concrete structures for structural health monitoring

Yosef

Goldfeld

2020

Structural Health Monitoring

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The goal of this study is to develop a structural health monitoring methodology for smart self-sensory carbon-based textile reinforced concrete elements. The self-sensory concept is based on measuring the electrical resistance change in the carbon roving reinforcement and by means of an engineering gage factor, correlating the relative electrical resistance change to an integral value of strain along the location of the roving. The concept of the nonlinear engineering gage factor that captures the unique micro-structural mechanism of the roving within the concrete matrix is demonstrated and validated. The estimated value of strain is compared to a theoretical value calculated by assuming a healthy state. The amount of discrepancy between the two strain values makes it possible to indicate and distinguish between the structural states. The study experimentally demonstrates the engineering gage factor concept and the structural health monitoring procedure by mechanically loading two textile reinforced concrete beams, one by a monotonic loading procedure and the other by a cyclic loading procedure. It is presented that the proposed structural health monitoring procedure succeeded in estimating the strain and in clearly distinguishing between the structural states.

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New perspectives on carbon reinforced concrete structures—Why new composites need new design strategies

Curbach,

Hegger,

Bielak

et al. 2024

Civil Engineering Design

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In civil engineering, carbon is typically regarded as a modern material to serve as reinforcement in concrete structures. Compared to steel reinforcement, it features two substantial benefits: It is not sensitive to corrosion, and has an enormously increased tensile strength. In contrast, carbon reinforcement is sensitive to lateral pressure and lacks the property of strain hardening. As a first step of establishing carbon reinforced concrete as a new building composite material, carbon reinforcement has basically served to replace the state‐of‐the‐art steel reinforcement. This target led to pioneering findings with respect to determining the material properties of the composite and developing advanced individual components. However, barely substituting steel by carbon does not allow to fully utilise the carbon's benefits while its disadvantageous properties reveal the limits of this approach. Instead, novel design principles are required to meet the material's nature aiming at appropriately using its beneficial properties.Currently, new construction principles are being researched for high‐performance building material combinations such as textile and carbon reinforced concrete. This paper provides an overview of baselines in the preliminary stages of this research. The overview includes history, inspiration, concrete matrices, non‐metallic reinforcement, structural elements, modelling, production, tomography, and sustainability. The objective of the study is to provide a baseline for the envisaged development of principles for future construction: radically new concepts for the design, modelling, construction, manufacturing, and use of sustainable, resource‐efficient building elements made of mineral building materials with the aim of entirely benefiting from the materials’ potential.This article is protected by copyright. All rights reserved.

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Sensing accumulated cracking with smart coated and uncoated carbon based TRC

Cited by 18 publications

References 35 publications

Monitoring capabilities of various smart self sensory carbon-based textiles to detect water infiltration

Monitoring capabilities of various smart self sensory carbon-based textiles to detect water infiltration

Smart self-sensory carbon-based textile reinforced concrete structures for structural health monitoring

New perspectives on carbon reinforced concrete structures—Why new composites need new design strategies

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