Design of Methodology for Non-Destructive Testing of Steel-Reinforced-Fiber-Concrete

Komárková, Tereza

doi:10.4028/www.scientific.net/kem.714.179

Cited by 11 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The details of the fields and other aspects are shown in, for example, Fig.1. An improved, more accurate methodology [1], [16], [18]- [19] was designed to expand the set of current impedancebased techniques. The novel approach is capable of evaluating the orientation and local densities of components of a composite, namely, components of a reinforcement containing electrically or electrically and magnetically conductive fibers.…”

Section: Impedance-based Evaluation Of Composite Materials Quality Viamentioning

confidence: 99%

A Non-Destructive Impedance Method Using Resonance to Evaluate the Concentration of Steel Fibers in Concrete

Bachorec

Fiala²,

Steinbauer

et al. 2018

Measurement Science Review

View full text Add to dashboard Cite

Steel-fiber reinforced concrete is a composite material characterized by outstanding tensile properties and resistance to cracking. The concrete, however, exhibits such characteristics only on the condition that the steel fibers in the final, hardened composite are distributed evenly. Current methods to evaluate the distribution and concentration in a fiber composite are either destructive or exhibit a limited capability of evaluating the concentration and orientation of the fibers. In this context, the paper discusses auxiliary techniques and laboratory tests that evaluate the density and orientation of the fibers in a composite material, presenting an innovative approach to impedance-based non-destructive testing. The actual methodology utilizes the resonance of the measuring device and the measured sample set; the desired state occurs within the interval of f = 10 kHz and 2 GHz.

show abstract

Section: Impedance-based Evaluation Of Composite Materials Quality Viamentioning

confidence: 99%

A Non-Destructive Impedance Method Using Resonance to Evaluate the Concentration of Steel Fibers in Concrete

Bachorec

Fiala²,

Steinbauer

et al. 2018

Measurement Science Review

View full text Add to dashboard Cite

show abstract

“…Electrical resistivity measurements are one possible non-destructive test method for this analysis. This approach is beneficial since it is easier to apply and less costly compared to other methods such as CT-scanning, cross-sectional analysis via microscope or inductive techniques (see [12,[18][19][20][21][22][23][24][25][26][27][28][29]). With the help of an optimised experimental setup, this study focuses on the validation of electrical resistivity as a novel approach to assess the fibre content and orientation of drilling cores extracted from concrete plates with fibre contents up to 80 kg/m 3 .…”

Section: Introductionmentioning

confidence: 99%

A New Method to Determine the Steel Fibre Content of Existing Structures—Evaluation and Validation

2022

View full text Add to dashboard Cite

The in-situ measurement of the content and orientation of steel fibres in concrete structures is of great importance for the assessment of their specific mechanical properties, especially in the case of repair. For existing structures, the actual fibre content as well as the orientation of the fibres, which is based on many factors such as casting or compacting direction, is typically unknown. For structural maintenance or rehabilitation, those factors have to be determined in order to apply meaningful structural design calculations and plan necessary strengthening methods. For this reason, a new method based on the analysis of drilling cores of concrete structures has been established. The newly developed non-destructive test setup used in this research consists of a framework for cylindrical specimens in combination with an LCR meter to determine the electrical resistance of the fibre reinforced concrete. In combination with a suitable FEM model, concretes with fibre contents up 80 kg/m3 were analysed to derive a first model to assess the actual fibre content of steel fibre reinforced concretes. After a calibration of the literature’s equation by use of an adjusted aspect ratio for the analysis of drilling cores, the estimation of the fibre content is possible with high accuracy for the tested material combination. The results show that the newly developed test method is suitable for the rapid and non-destructive structural diagnosis of the fibre content of steel fibre reinforced concrete based on drilling cores using electrical resistivity measurements.

show abstract

“…The development of new NDT methods usable for evaluating the concentration and orientation of steel fibers in composites has been discussed several times among the professional public [5][6][7]. The authors themselves have been researching and publishing in this area for a long time [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

NDT Methods Suitable for Evaluation the Condition of Military Fortification Construction in the Field

et al. 2020

View full text Add to dashboard Cite

The protective structure is designed to protect the live force against the impact of a shock wave and projectiles, it cannot be diagnosed by the destructive method which devalues the protective structure by sampling. The authors are looking for a combination of suitable non-destructive technology (NDT) methods that would be used in the future to prove the degree of damage to cement-based protective structures after an explosion. This article represents the first part of an experiment designed to verify the applicability of NDT methods, to evaluate the degree of damage of the protective structure in the field. The experiment consists of three parts. The first part is a laboratory verification of the initial material characteristics of the materials used. The first test set of structural elements is made of steel fiber-reinforced concrete. The elements are evaluated using NDT methods and for comparison by destructive laboratory methods. The second part is the impact of structures using explosion and evaluation of the condition of structures using NDT methods in the field. The last part is used to verify the results of the NDT method, which ensures the residual strength of the structure in the laboratory and try to find the relationship between changes in the results of NDT methods and the residual strength. Radiography was included in the introductory and concluding parts of the experiment to verify the results. Although this method is not suitable for using in-situ, it is the only standardized method of the NDT methods used.

show abstract

Design of Methodology for Non-Destructive Testing of Steel-Reinforced-Fiber-Concrete

Cited by 11 publications

References 5 publications

A Non-Destructive Impedance Method Using Resonance to Evaluate the Concentration of Steel Fibers in Concrete

A Non-Destructive Impedance Method Using Resonance to Evaluate the Concentration of Steel Fibers in Concrete

A New Method to Determine the Steel Fibre Content of Existing Structures—Evaluation and Validation

NDT Methods Suitable for Evaluation the Condition of Military Fortification Construction in the Field

Contact Info

Product

Resources

About