Micro carbon fiber based concrete as a strain-damage sensing material

Cholker, Arvind Kumar; Tantray, Manzoor

doi:10.1016/j.matpr.2019.06.629

Cited by 14 publications

(5 citation statements)

References 12 publications

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“…The slow strength gain of the CC can be attributed to the carbon and graphite used as conductive fillers in its mix. It is important to note that the addition of the conductive fillers decreased the compressive strength, which is similar to the results in [6,14,[49][50][51][52], where the increase in conductive fillers in the mix, such as carbon, contributed to a decrease in the compressive strength. Similarly, the conductive fillers affected the stiffness; therefore, the MOE of both mixes differed by 35%.…”

Section: Compressive and Moe Control Samplessupporting

confidence: 82%

Self-Consolidated Concrete-to-Conductive Concrete Interface: Assessment of Bond Strength and Mechanical Properties

EL-Afandi,

Yehia,

Landolsi

et al. 2023

Fibers

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In this paper, the mechanical properties and bond strength of composite samples that consist of a conductive concrete (CC) layer and a self-consolidated concrete (SCC) layer are investigated. The bond strength study includes two parameters: (1) surface preparation and (2) casting and testing directions. The surface preparation study shows that, compared to the other methods in this study, the shear key method is the most suitable surface preparation method to fully utilize the CC in a composite. Moreover, the casting direction study reveals that the strength is heavily dependent on the type of test used along with CC’s layer positioning. The flexural strength study confirms that positioning the CC mix in the tensile region is beneficial since it can increase the flexural strength of a structure because of the hybrid steel fibers included in the mixture. Finally, different codes/specifications and published theoretical results are used to predict the CC’s mechanical properties, and the predictions are not as accurate as the SCC predictions, which can be attributed to the presence of conductive fillers in the CC mix.

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Section: Compressive and Moe Control Samplessupporting

confidence: 82%

Self-Consolidated Concrete-to-Conductive Concrete Interface: Assessment of Bond Strength and Mechanical Properties

EL-Afandi,

Yehia,

Landolsi

et al. 2023

Fibers

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“…A correlation between the fractional change in the electrical resistivity and the change in the strain of concrete reinforced with 0.5, 1, 1.5, and 2 wt% CSFs (relative to the weight of the cement) has been reported by Cholker et al [58]. They used CSFs with a diameter and length of 7 µm and 6 mm, respectively.…”

Section: Carbon Short Fibresmentioning

confidence: 76%

A review of intrinsic self-sensing cementitious composites and prospects for their application in transport infrastructures

Abedi

Fangueiro

Correia

2021

Construction and Building Materials

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“…Various studies [25,27] have suggested that the electrical resistance of the CNM changes as the material experiences damage. This correlation leads to the idea of incorporating CNM in the simulated rock layers to measure their electrical resistance changes as a result of excavation.…”

Section: Using Resistance Change To Reflect Materials Damagementioning

confidence: 99%

A Carbon Nanocomposite Material Used in the Physical Modelling of the Overburden Subsidence Process

Xie,

Ning,

et al. 2023

Nanomaterials

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Carbon nanomaterial is widely used in structural health monitoring due to the advantage of sensitivity and good mechanical properties. This study presents a novel approach employing carbon nanocomposite materials (CNMs) to characterize deformation and damage evolution in physical modelling. As the primary measurement method, the CNM is used to investigate the deformation characteristics of a 200–400 m thick sandstone bed at a 1 km deep longwall mine. The sandstone unit is identified as an ultra-thick key stratum (UTKS), with its thicknesses varying across different mining panels of the UTKS. The results of CNM monitoring show that the UTKS remains stable even after a consecutive excavation of 900 m in width. This stability impedes the upward propagation of overlying strata failure, leading to minimal surface subsidence. The study demonstrates the huge potential of CNM in the mining area, which can be useful for investigating material damage in physical modelling studies. The findings suggest that the cumulative extraction width in individual mining areas of the mine should be controlled to avoid a sudden collapse of the UTKS, and that special attention should be paid to where the UTKS’s thickness changes substantially. The substantial variation in UTKS thickness significantly impacts the pattern of overburden subsidence.

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Micro carbon fiber based concrete as a strain-damage sensing material

Cited by 14 publications

References 12 publications

Self-Consolidated Concrete-to-Conductive Concrete Interface: Assessment of Bond Strength and Mechanical Properties

Self-Consolidated Concrete-to-Conductive Concrete Interface: Assessment of Bond Strength and Mechanical Properties

A review of intrinsic self-sensing cementitious composites and prospects for their application in transport infrastructures

A Carbon Nanocomposite Material Used in the Physical Modelling of the Overburden Subsidence Process

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