Self-sensing damage assessment and image-based surface crack quantification of carbon nanofibre reinforced concrete

Erdem, Savaş; Hanbay, Serap; Blankson, Marva Angela

doi:10.1016/j.conbuildmat.2016.12.197

Cited by 70 publications

(26 citation statements)

References 18 publications

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“…In recent years, the use of nanomaterials to enhance the mechanical properties of cementitious composites has been considered as a promising approach. [34][35][36] Several nanomaterials, including Silica, 37 titania, 38 alumina, 39 iron oxide, 40 nanoclay, 41 nano-kaolinite, 42 carbon nanotubes [43][44][45] or nanofibers, 46,47 and graphene oxide, 48 were used as modifiers to enhance the performances of cement-based materials. Although previous studies have demonstrated that the addition of nanomaterials has positive effects on the mechanical properties enhancement of cementitious composites, however, the weight fractions of the nano modifiers were ranged from 3 to 10 wt%, which largely limited their applications in civil infrastructures because of the relatively high cost of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Low dosage nano-silica modification on lightweight aggregate concrete

Zhang

Xie

Cheng

et al. 2018

Nanomaterials and Nanotechnology

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Although the nano modification has been considered as a promising approach to enhance the mechanical properties of cement-based concrete, the investigation of low dosage nano modification on lightweight cement-based concrete is still very limited. In this study, the lightweight concrete, which was modified with low dosage nano-silica particles, were investigated. Non-prewetting and prewetting methods were used to prepare the lightweight concrete samples. The compressive and flexural strengths were tested to evaluate the modification effects of low dosage nano-silica on lightweight concrete. The microstructure analyses demonstrate that the hydration process of the cement paste can be changed with addition of nanosilica, and new types of hydration products have been observed in nano modified cementitious matrix. The interface between the lightweight aggregates and the cement paste can be reinforced by low dosage of nano-silica due to the new types of hydration products. However, relatively high dosage of nano-silica will reduce the modification effect because of the internal stress, which is resulted from the volume expansion of the new types of hydration product, at the interface of the lightweight aggregates and the cement paste. This study not only shows the possibility of low dosage nano modification on the mechanical properties enhancement of lightweight concrete but also provides potential modification mechanisms, which help to design and fabricate high-performance lightweight concrete materials.

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Section: Introductionmentioning

confidence: 99%

Low dosage nano-silica modification on lightweight aggregate concrete

Zhang

Xie

Cheng

et al. 2018

Nanomaterials and Nanotechnology

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“…Recently there has been a lot of interest in the development of innovative cement-based materials with crack self-sensing capabilities [21,22] or general self-sensing properties [23,24]. These materials are based on the addition of electrically conductive fibres or particles to the cement matrix and the modification of its electrical properties, without compromising the mechanical performance of the composite material.…”

Section: Introductionmentioning

confidence: 99%

Effect of Metallic Waste Addition on the Physical and Mechanical Properties of Cement-Based Mortars

et al. 2018

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Featured Application: The development of advance construction materials based on waste valorisation is a reality. The cement-based mortar with recycled metallic waste presented in this study could be potentially used as a building material with crack self-monitoring properties.Abstract: This paper investigates the influence of the type and amount of recycled metallic waste on the physical and mechanical properties of cement-based mortars. The physical and mechanical properties of cement mortars, containing four different amounts of metallic waste (ranged 4 to 16% by cement weight), were evaluated by measuring the bulk density, total porosity, flexural and compressive resistance, and dynamic elastic modulus by ultrasonic tests. All the properties were measured on test specimens under two curing ages: 7 and 28 days. Additionally, the morphological properties and elemental composition of the cement and metallic waste were evaluated by using Scanning Electron Microscopy (SEM), energy dispersive X-ray spectroscopy (EDXS), and X-ray fluorescence (XRF). Main results showed that the addition of metallic waste reduced the bulk density and increased the porosity of the cement-based mortars. Furthermore, it was observed that flexural and compressive strength proportionally increased with the metallic waste addition. Likewise, it was proven that elastic modulus, obtained by compressive and ultrasonic tests, increases with the metallic waste amount. Finally, based on a probability analysis, it was confirmed that the addition of metallic waste did not present a significant effect on the mechanical performance of the cement-based mortars.

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“…Strain-sensing [17] and damage sensing properties [4,12,13,20,21] on cement composites has been studied by adding different percentages of carbon fibers and carbon nano tubes (CNT) and also in combination of both [22]. Few other researchers have also studied real application for traffic monitoring and health monitoring of structures [23,24] using carbon fibers in concrete.…”

Section: Strain Sensing Principalmentioning

confidence: 99%

Strain and Damage Sensing Property of Self-compacting Concrete Reinforced with Carbon Fibers

Cholker

Tantray

2019

IJE

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A B S T R A C TPresent paper investigated the strain and damage sensing property on concrete cubes embedded with carbon fibers. Concrete cubes of dimension 150 mm have been casted with different concentration of carbon fibers to study the strain and damage sensing property under cyclic loading that can be further used for health monitoring as non-destructive testing (NDT) approach. All the specimens were tested under cyclic loading within elastic region of the sample for three cycles of loading with a maximum load of 195kN for strain sensing test. During cyclic loading, fractional change in resistance (FCR) is calculated and co-relation with the stress is plotted. During strain sensing test, gauge factors (GF) were also calculated during loading and unloading on the samples. From obtained results, it is found that the concrete sample containing 1.5% of carbon fibers by weight of cement gives best co-relation between stress and FCR that can be further used for health monitoring purpose. Along with strain sensing property, damage sensing property and ultimate load carrying capacities of all the specimens are also reported in present paper with detailed explanation.

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Self-sensing damage assessment and image-based surface crack quantification of carbon nanofibre reinforced concrete

Cited by 70 publications

References 18 publications

Low dosage nano-silica modification on lightweight aggregate concrete

Low dosage nano-silica modification on lightweight aggregate concrete

Effect of Metallic Waste Addition on the Physical and Mechanical Properties of Cement-Based Mortars

Strain and Damage Sensing Property of Self-compacting Concrete Reinforced with Carbon Fibers

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