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Journal articles on the topic 'Reinforced concrete; Non-destructive testing'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Corbett, D., and G. Tronca. "Non-Destructive Testing of Steel Fibre Reinforced Concrete." IOP Conference Series: Materials Science and Engineering 246 (September 2017): 012016. http://dx.doi.org/10.1088/1757-899x/246/1/012016.

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2

Lute, Marina. "Non-Destructive Vibration Tests on Reinforced Concrete Structures." Key Engineering Materials 660 (August 2015): 186–91. http://dx.doi.org/10.4028/www.scientific.net/kem.660.186.

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The purpose of this paper is looking at the dynamic response of existing reinforced concrete structures which have possibly sustained various levels of damage, a set of tests need to be identified that will be able to detect damage and quantify the damage if damage exists. In this work it is presented a further study on the effect of damage on the behavior of reinforced concrete beams. In particular, the non-linear behavior of these beams is considered once significant cracking has been introduced, outlining the stage of testing carried out in dynamic field.

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Abdallah, Wafaa, Jacqueline Saliba, Ziubir-Mehdi Sbartaï, Marwan Sadek, Fadi Hage Chehade, and S. Mohammed ElAchachi. "Reliability analysis of non-destructive testing models within a probabilistic approach." MATEC Web of Conferences 281 (2019): 04003. http://dx.doi.org/10.1051/matecconf/201928104003.

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The diagnosis of reinforced concrete is essential to detect the degradation and thus maintain the structural performance of civil engineering structures. This paper aims to establish a mathematical relationship between the ultrasonic pulse velocity UPV (considered as an observable variable) and two concrete properties indicators (compressive strength fc and water content W) within a probabilistic framework. Synthetic simulations are proposed to derive a conversion model between the statistical properties of the output and the input parameters for a reinforced concrete structure by taking into

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4

Zezulová, Eva, and Tereza Komárková. "Techniques of Non-Destructive Testing of Steel Fiber Reinforced Concrete." Key Engineering Materials 755 (September 2017): 153–58. http://dx.doi.org/10.4028/www.scientific.net/kem.755.153.

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Non-destructive testing (NDT) is seeing increasingly frequent use in civil engineering thanks to the fact that the tests are repeatable and do not cause serious damage to the material. The requirements for the development and modernization of available testing devices and methodologies are ever increasing and the testing of existing structures often requires the use of NDT. Unfortunately, every measurement and methodology has its limits and the measurement devices for the evaluation of steel fiber reinforced concrete (SFRC) are no exception. In recent decades there has been an effort to modern

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5

Komárková, Tereza. "Design of Methodology for Non-Destructive Testing of Steel-Reinforced-Fiber-Concrete." Key Engineering Materials 714 (September 2016): 179–85. http://dx.doi.org/10.4028/www.scientific.net/kem.714.179.

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Measuring instruments used for non-destructive testing of structures thanks to advances in electronics and electrical engineering are still more frequently applied. Among the building materials with which the ability to perform quality control using non-destructive testing methods would be most welcome is indisputably steel reinforced fibre concrete (SFRC). The paper deals with the design of new methods and methodologies that enable determination of the concentration and orientation of steel fibres in steel fibre reinforced concrete. Especially the distribution of steel fibres in concrete is t

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6

Concu, Giovanna, Barbara De Nicolo, and Luisa Pani. "Non‐destructive testing as a tool in reinforced concrete buildings refurbishments." Structural Survey 29, no. 2 (2011): 147–61. http://dx.doi.org/10.1108/02630801111132821.

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7

Belentsov, Yuri A., and Liliya F. Kazanskaya. "Non-destructive methods of concrete quality control as factor in reliability of concrete and reinforced concrete structures in transport facilities." Transportation Systems and Technology 4, no. 1 (2018): 058–67. http://dx.doi.org/10.17816/transsyst2018041058-067.

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Aim: The development of theory and practice of construction science leads to a need to enhance the basics of design, construction and operation of concrete and reinforced concrete structures. Despite significant progress, there is risk of collapse of different structures at various stages of their lifecycle. Current state of construction industry leads to a need to increase the quality and reliability of buildings and structures under construction. Methods: The authors have used methods of probabilistic forecasting in this work Results: The development of methods of construction ma

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Ulybin, Aleksey V., and Alexander V. Puzanov. "About Test Methods of Corrosion State of Reinforced Concrete Structures." Applied Mechanics and Materials 578-579 (July 2014): 981–86. http://dx.doi.org/10.4028/www.scientific.net/amm.578-579.981.

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The article describes the traditional methods used in Russia for testing of reinforcement corrosion conditions including peculiarities and weak sides of it. The new methods of non-destructive testing, which are used mainly in foreign countries, are overviewed there. The physical basics and the advantages of the testing method of half-cell potential are also characterized. A relatively new method of non-destructive testing of reinforcement corrosion condition is the method of measuring the concrete resistivity. The article describes the principal of its application and the factors influencing t

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Davidyuk, Artem, and Igor Rumyantsev. "Quality control of high-performance concrete in high-rise construction during operation." MATEC Web of Conferences 170 (2018): 01035. http://dx.doi.org/10.1051/matecconf/201817001035.

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With onset of the XXI century, the demand for construction of high-rise buildings with the load-bearing framework made of high-performance cast-in-situ concrete has increased many-fold in the construction sector. Specific features of the high-performance concrete of bearing structures in the situation of real operation of high-rise buildings are continuously studied by scientists and specialists all over the world, and regulatory and methodological documents are being complemented and adjusted. High-performance concretes and structures made of them possess some specific features that should be

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10

Rubaratuka, I. A., and P. Ndumbaro. "Application of Non-Destructive Testing in Evaluating Reinforced Concrete Structural Elements in Buildings." Tanzania Journal of Engineering and Technology 31, no. 1 (2008): 83–87. http://dx.doi.org/10.52339/tjet.v31i1.419.

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Of recent a large number of existing reinforced concrete buildings have required reconstruction, renovation and improvement. This tendency poses a number of problems that have to be solved, the main one being to determine the actual strength condition of the structural components/elements of the building. It includes determination of the qualityof materials used, specification of the types and description of apparent faults and damages and extent of wear of the building. To undertake this evaluation, non – destructive testing methods are used. In this paper, applications of non –destructive te

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11

Karla, Hornbostel, Tobias Danner, and Mette Rica Geiker. "Non-destructive Test Methods for Corrosion Detection in Reinforced Concrete Structures." Nordic Concrete Research 62, no. 1 (2020): 41–61. http://dx.doi.org/10.2478/ncr-2019-0005.

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AbstractSeveral inspection methods can be used to assess the corrosion state of steel reinforcement in concrete. Especially for periodical field surveys and monitoring, non-destructive testing (NDT) methods are to be preferred as they do not cause any or very limited damage to the existing concrete. In this paper, the corrosion state of three reinforced concrete beams exposed to marine environment for 25 years was evaluated by measuring three parameters; electrochemical potential, concrete resistivity and corrosion rate. The measurements were performed with commercial devices. It was found tha

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SANA, Ryosuke, Mochimitsu KOMORI, Mitsutaka HORI, and Kennichi ASAMI. "F31 Non destructive testing of the steel bar in Reinforced concrete(3rd)." Proceedings of Conference of Kyushu Branch 2011.64 (2011): 217–18. http://dx.doi.org/10.1299/jsmekyushu.2011.64.217.

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13

Meneghetti, F., and T. Meneghetti. "Non-destructive testing to evaluatein situ maturity on prestressed reinforced concrete members." Materials and Structures 18, no. 3 (1985): 171–80. http://dx.doi.org/10.1007/bf02472966.

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14

Kulkarni, Kishor S., Subhash C. Yaragal, and Babu Narayan S.K. "Core recovery: a damage diagnosis tool for thermally deteriorated concrete." Journal of Structural Fire Engineering 10, no. 2 (2019): 126–37. http://dx.doi.org/10.1108/jsfe-03-2018-0008.

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Purpose This paper aims to study and assess residual strengths of concrete specimen exposed to elevated temperatures by core recovery tests. Design/methodology/approach The appraisal of concrete structures is typically carried out by means of partially destructive tests such as tests on concrete cores taken from the structure and non-destructive testing. Findings This paper presents results associated with determination of residual compressive strengths of plain and reinforced concrete elements exposed to elevated temperatures by core recovery test. Physical observations and results of compres

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15

Zhang, Jianren, Hui Peng, and C. S. Cai. "Destructive Testing of a Decommissioned Reinforced Concrete Bridge." Journal of Bridge Engineering 18, no. 6 (2013): 564–69. http://dx.doi.org/10.1061/(asce)be.1943-5592.0000408.

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16

Drobiec, Łukasz, Jan Gierczak, Rajmund Ignatowicz, Piotr Kozioł, and Tomasz Nowak. "Concrete Tank Failure as the Result of Implementing Wrong Boundary Conditions for Wall Support—Case Study." Materials 14, no. 10 (2021): 2474. http://dx.doi.org/10.3390/ma14102474.

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Damage to large reinforced concrete structures is rarely due to design errors. Sometimes, however, a small error can lead to major damage and costly repairs. The article describes the damage, the results of non-destructive and destructive tests, the results of numerical calculations, and the method of repairing a reinforced concrete tank in a sewage treatment plant. The failure was caused by applying the wrong boundary conditions to the reinforced concrete wall support inside an existing biological reactor. During leak testing, one of the new walls cracked and was displaced, which resulted in

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17

Dua, G., and R. Mulaveesala. "Thermal wave imaging for non-destructive testing and evaluation of reinforced concrete structures." Insight - Non-Destructive Testing and Condition Monitoring 60, no. 5 (2018): 252–56. http://dx.doi.org/10.1784/insi.2018.60.5.252.

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18

., Karthik B. S. "NON DESTRUCTIVE TESTING AND SERVICEABILITY PROPERTIES OF HIGH STRENGTH GLASS FIBER REINFORCED CONCRETE." International Journal of Research in Engineering and Technology 05, no. 06 (2016): 314–18. http://dx.doi.org/10.15623/ijret.2016.0506057.

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19

Hobbs, Brian, and Mohamed Tchoketch Kebir. "Non-destructive testing techniques for the forensic engineering investigation of reinforced concrete buildings." Forensic Science International 167, no. 2-3 (2007): 167–72. http://dx.doi.org/10.1016/j.forsciint.2006.06.065.

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20

Štoller, Jiří, Eva Zezulová, and Marek Foglar. "Non-Destructive Examination of Cement Based Materials before and after Explosion Tests." Applied Mechanics and Materials 796 (October 2015): 125–36. http://dx.doi.org/10.4028/www.scientific.net/amm.796.125.

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The article describes the use of ultrasonic testing methods for examining slabs made from cement based materials. For the detection of cracks, in full-scale slabs before and after the explosion, ultrasonic pulse method was used. Data obtained before the explosion confirm the high quality of the cement based material. Another set of data taken after the explosion shows the scale of cracks in the slabs. The article compares material characteristics of the unreinforced concrete, steel fibre concrete and high performance fibre reinforced concrete on the basis of materials tested by using the passa

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21

Maj, Marek, Andrzej Ubysz, Hala Hammadeh, and Farzat Askifi. "Non-Destructive Testing of Technical Conditions of RC Industrial Tall Chimneys Subjected to High Temperature." Materials 12, no. 12 (2019): 2027. http://dx.doi.org/10.3390/ma12122027.

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Non-destructive tests of reinforced concrete chimneys, especially high ones, are an important element in assessing their condition, making it possible to forecast their safe life. Industrial chimneys are often exposed to the strong action of acidic substances, They are negatively exposed to the condensation of the flue gases. Condensate affects the inside of the thermal insulation and penetrates the chimney wall from the outside. This is one reason for the corrosion of concrete and reinforcing steel. Wet thermal insulation settles, and drastically reduces its insulating properties. This leads

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22

D., A. A. Lingga Ariya, Indradi Wijatmiko, and Christin Remayanti Nainggolan. "Pengaruh Variasi Mutu Beton Bertulang Terhadap Cepat Rambat Gelombang Dengan Menggunakan Metode Non Destructive Test." Rekayasa Sipil 14, no. 1 (2020): 60–69. http://dx.doi.org/10.21776/ub.rekayasasipil.2020.014.01.8.

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Preferably in testing, building structures need not be destroyed. Tests that can be used on the concrete can use non-destructive methods that do not damage the test objects. Examples of testing can use UPV tests that are aimed at knowing the quality of concrete from the pulse velocity. The test objects used in this study are reinforced concrete beams with dimensions 20 x 20 x 100 cm. Test objects are differentiated into 3 quality variations of reinforced concrete with quality of concrete12.5 MPa, 18.75 MPa, and 25 MPa. To conduct analysis of the concrete density used PUNDIT PL-200. Ultrasonic

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23

Rathod, Harsh, and Rishi Gupta. "Two dimensional non-destructive testing data maps for reinforced concrete slabs with simulated damage." Data in Brief 25 (August 2019): 104127. http://dx.doi.org/10.1016/j.dib.2019.104127.

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24

Vassou, V., and R. J. Kettle. "Near-surface characteristics of fibre-reinforced concrete floors: an investigation into non-destructive testing." Insight - Non-Destructive Testing and Condition Monitoring 47, no. 7 (2005): 400–407. http://dx.doi.org/10.1784/insi.2005.47.7.400.

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25

Liu, Lanbo, and Tieshuan Guo. "Seismic non-destructive testing on a reinforced concrete bridge column using tomographic imaging techniques." Journal of Geophysics and Engineering 2, no. 1 (2005): 23–31. http://dx.doi.org/10.1088/1742-2132/2/1/004.

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26

Rathod, Harsh, and Rishi Gupta. "Sub-surface simulated damage detection using Non-Destructive Testing Techniques in reinforced-concrete slabs." Construction and Building Materials 215 (August 2019): 754–64. http://dx.doi.org/10.1016/j.conbuildmat.2019.04.223.

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27

Komarkova, Tereza, Pavel Fiala, Miloslav Steinbauer, and Zdenek Roubal. "Testing an Impedance Non-destructive Method to Evaluate Steel-Fiber Concrete Samples." Measurement Science Review 18, no. 1 (2018): 35–40. http://dx.doi.org/10.1515/msr-2018-0006.

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Abstract Steel-fiber reinforced concrete is a composite material characterized by outstanding tensile properties and resistance to the development of cracks. The concrete, however, exhibits such characteristics only on the condition that the steel fibers in the final, hardened composite have been distributed evenly. The current methods to evaluate the distribution and concentration of 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 tests related to the evaluation of the

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Noori Hoshyar, Azadeh, Maria Rashidi, Ranjith Liyanapathirana, and Bijan Samali. "Algorithm Development for the Non-Destructive Testing of Structural Damage." Applied Sciences 9, no. 14 (2019): 2810. http://dx.doi.org/10.3390/app9142810.

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Monitoring of structures to identify types of damages that occur under loading is essential in practical applications of civil infrastructure. In this paper, we detect and visualize damage based on several non-destructive testing (NDT) methods. A machine learning (ML) approach based on the Support Vector Machine (SVM) method is developed to prevent misdirection of the event interpretation of what is happening in the material. The objective is to identify cracks in the early stages, to reduce the risk of failure in structures. Theoretical and experimental analyses are derived by computing the p

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Shu, Jiangpeng, Niklas Bagge, and Jonny Nilimaa. "Field Destructive Testing of a Reinforced Concrete Bridge Deck Slab." Journal of Bridge Engineering 25, no. 9 (2020): 04020067. http://dx.doi.org/10.1061/(asce)be.1943-5592.0001604.

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30

Vodička, Jan, Vladimír Křístek, and Václav Ráček. "Strength Classes of Concrete versus Strength Classes of Fibre Concrete." Solid State Phenomena 249 (April 2016): 112–18. http://dx.doi.org/10.4028/www.scientific.net/ssp.249.112.

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Basic characteristics of each produced concrete and fibre reinforced concrete are characterized by the compression strength recorded by the standard sets of tests performed on cylinders and cubes. In addition, for the fibre reinforced concrete, the characteristic tensile strength at formation of microcracks and cracks of standard widths is required. Proofs of the referred characteristic tensile strength should be carried out also by the destructive tests on standard specimens including the methodology provided for their implementation.The rapid development of fibre reinforced concrete, acceler

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31

Kravcov, Alexander N., Pavel Svoboda, Adam Konvalinka, et al. "Laser-Ultrasonic Testing of the Structure and Properties of Concrete and Carbon Fiber-Reinforced Plastics." Key Engineering Materials 722 (December 2016): 267–72. http://dx.doi.org/10.4028/www.scientific.net/kem.722.267.

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This paper discusses the possibility of studying composite materials by non-destructive laser-ultrasonic testing technique. Concrete samples and carbon-epoxy composites were examined, defects located and elastic wave velocities measured. The internal structure of the samples was visualized in 2D images.

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32

Gao, Li Jun, Yong Sheng Zhang, and Qin Li. "Research on Damage Status of the Reinforced Concrete Ground Floor Columns." Applied Mechanics and Materials 226-228 (November 2012): 1436–40. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.1436.

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In this paper, dynamic measurement method is applied to test the damage of the bottom reinforced concrete column. The comparison between the calculated first order frequency of the bottom reinforced concrete column and the measured first order frequency shows that the result is consistent. This indicates that this approach is feasible. However, in recent years, dynamic measurement method is widely used in non-destructive testing of bridges and floors. The principle of the dynamic measurement method for the detection of reinforced concrete column utilizes the measured natural frequency, vibrati

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Polimeno, Maria Rita, Ivan Roselli, Vincenza A. M. Luprano, Marialuisa Mongelli, Angelo Tatì, and Gerardo De Canio. "A non-destructive testing methodology for damage assessment of reinforced concrete buildings after seismic events." Engineering Structures 163 (May 2018): 122–36. http://dx.doi.org/10.1016/j.engstruct.2018.02.053.

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34

Zhang, Jin Quan, Hong Wei Ren, and Bo Yu. "Failure Testing of a Full-Scale Reinforced Concrete T-Girder Bridge." Advanced Materials Research 243-249 (May 2011): 1767–73. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.1767.

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As a common type of bridge, the reinforced concrete simply supported T-girder bridges have some usual disease problems such as web vertical cracks, incline cracks near the supports and diaphragm damage, and so on injured by transportation loads. In Shanxi province most of T-girder bridges appear to be under strength for current vehicle loads because most of which are designed by conventional methods and the old codes so it is important to evaluate how the existing damage influence the ultimate bearing capacity of the bridge. The destructive test is a directive mean of verifying the ultimate be

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Ibrahim, Yasser E., Nabil Al-Akhras, and Walid Al-Kutti. "Destructive and Nondestructive Testing on Silica Fume Concrete." Advanced Materials Research 919-921 (April 2014): 1890–93. http://dx.doi.org/10.4028/www.scientific.net/amr.919-921.1890.

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Factors such as poor design, bad workmanship and a harsh environment can combine to cause deterioration within a concrete structure leading to visually unacceptable surface cracking or spalling of concrete cover [. In aggressive environments, corrosion of steel reinforcing bars is responsible for major deteriorations in concrete structures. Reduction in bar diameter leads to a lower resistance, which can result in brittle failure of the bar. Initiation and progression of reinforcing steel corrosion can lead to progressive weakening of the structure due to damage accumulation over a period of t

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de Alcantara, Naasson P., Danilo C. Costa, Diego S. Guedes, Ricardo V. Sartori, and Paulo S. S. Bastos. "A Non-Destructive Testing Based on Electromagnetic Measurements and Neural Networks for the Inspection of Concrete Structures." Advanced Materials Research 301-303 (July 2011): 597–602. http://dx.doi.org/10.4028/www.scientific.net/amr.301-303.597.

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This paper presents a new non-destructive testing (NDT) for reinforced concrete structures, in order to identify the components of their reinforcement. A time varying electromagnetic field is generated close to the structure by electromagnetic devices specially designed for this purpose. The presence of ferromagnetic materials (the steel bars of the reinforcement) immersed in the concrete disturbs the magnetic field at the surface of the structure. These field alterations are detected by sensors coils placed on the concrete surface. Variations in position and cross section (the size) of steel

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SHUBBAR, ALI, Zainab Al-khafaji, Mohammed Nasr, and Mayadah Falah. "USING NON-DESTRUCTIVE TESTS FOR EVALUATING FLYOVER FOOTBRIDGE: CASE STUDY." Knowledge-Based Engineering and Sciences 1, no. 01 (2020): 23–39. http://dx.doi.org/10.51526/kbes.2020.1.01.23-39.

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The concrete structures deterioration in the last few decades required effective methods for evaluating and maintaining the structure condition. Currently, assessing the performance and safety of reinforced concrete (RC) structures relies on routine-based visual inspection (VI). However, there are another non-destructive test (NDT) technique that can provide a more accurate assessment of the structures. Thus, in this study, a footbridge located in Liverpool, UK is chosen as a case study and has NDT techniques used for assessment. The main objective of this research is to determine the conditio

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38

Budi Wijaya, Gunawan. "Comprehensive condition assessment program on the fire damaged structure - a project case in Singapore." MATEC Web of Conferences 195 (2018): 02034. http://dx.doi.org/10.1051/matecconf/201819502034.

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A fire damaged structure at the eastern part of Singapore was assessed. Some concrete spalling exposing corroded steel reinforcements were noted on the post tensioned concrete beam and reinforced concrete slab, raising a concern about the structural integrity of the overall floor. A comprehensive condition assessment was performed on the affected structural elements to determine the extent of the damage, which included some on-site destructive and non-destructive tests as well as some laboratory testing on the collected concrete and steel samples. Testing data revealed that the concrete was st

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Zulkefli, Zainordin Firdaus, Mohd Hafiz Zawawi, Nurul Husna Hassan, Mohd Remy Rozainy Mohd Arif Zainol, Mohamad Aizat Abas, and Ahmad Zhafran Ahmad Mazlan. "Calculating the Moduli Elasticity For Reinforced Concrete Using New Rule of Mixtures Approach for the Dam Structure." MATEC Web of Conferences 217 (2018): 04003. http://dx.doi.org/10.1051/matecconf/201821704003.

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Dam is the important structure use for water domestic store, electricity power supply, irrigation and flood control. Dam deal with reinforced concrete as a main material in construction. the material considerable safe when ability to support external and internal load. the capability of dam material due to safety is effect by degradation. Prevention monitoring must be conducted for high risk structure. Thus, moduli elastic is a mechanical property to measure stiffness and had relationship between stress and strain of material. While non-destructive and destructive testing in site inspection do

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40

ILYIN, Nikolay A., Denis A. PANFILOV, Nikita A. KOLESNEV, and Ivan A. SILANTYEV. "EVALUATION OF DESIGN FIRE RESISTANCE OF A REINFORCED CONCRETE BEAM WITH CENTRAL PROP." Urban construction and architecture 9, no. 4 (2019): 16–21. http://dx.doi.org/10.17673/vestnik.2019.04.3.

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The article describes the essence of the technological method of testing a reinforced concrete beam with central prop for fire resistance without destruction, based on a set of individual indicators of the quality of concrete and reinforcement. The influence of the geometrical dimensions of a reinforced concrete beam with central prop, the heating pattern of the calculated cross section under fire conditions, the placement of the reinforcement in the calculated cross section, the depth and degree of fire protection of the concrete, the coefficient of thermal diffusion of concrete, the magnitud

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Sriramadasu, Rajeshwara Chary, Ye Lu, and Sauvik Banerjee. "Identification of incipient pitting corrosion in reinforced concrete structures using guided waves and piezoelectric wafer transducers." Structural Health Monitoring 18, no. 1 (2018): 164–71. http://dx.doi.org/10.1177/1475921718809151.

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Corrosion poses a great threat to ageing civil infrastructure in the world, and researchers are seeking methods to monitor the corrosion in reinforced concrete structures. Detection of corrosion at its incipient stage has been an impending task in the non-destructive testing of materials. Several non-destructive testing methods to assess the presence of corrosion exist. The limitation of the current methods is that either they require measurement at several points or they require a large network of sensors. Guided wave-based monitoring overcomes these limitations because a large area can be sc

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Sánchez, J. L., A. Cobo, B. Díaz, and I. Mateos. "Estudio experimental del comportamiento a compresión de hormigones autocompactantes reforzados con fibras de acero = Experimental study of performance self-compacting concrete reinforced with steel fibers." Anales de Edificación 1, no. 2 (2015): 17. http://dx.doi.org/10.20868/ade.2015.3100.

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Resumen El hormigón autocompactante reforzado con fibras de acero presenta simultáneamente las ventajas de los hormigones autocompactantes y de los reforzados con fibras. Se consigue un material de altas prestaciones en cuanto a su colocación en obra, tenacidad y ductilidad. En este trabajo se ha estudiado el comportamiento mecánico de un hormigón autocompactante reforzado con fibras de acero. Se han realizado ensayos a compresión a distintas edades, así como ensayos no destructivos (medida de la velocidad de ultrasonidos e índice esclerométrico). Los resultados muestran la variación de la res

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43

Bardakov, V. V., A. I. Sagaydak, and S. V. Elizarov. "ACOUSTIC EMISSION BEHAVIOUR OF OVER-REINFORCED CONCRETE BEAMS." Kontrol'. Diagnostika, no. 255 (2019): 4–12. http://dx.doi.org/10.14489/td.2019.09.pp.004-012.

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The paper presents the results of the conducted experimental studies on three-point bend testing of over-reinforced concrete beams with incremental cyclic load, up to destruction, using the acoustic emission method. In total 3 RC beams differ from each other in reinforcement type, concrete composition and ultimate load were tested. Special attention is paid to the investigation of the relationship between destructive processes occurring during the testing of reinforced concrete beams and the evolution of acoustic emission data registered during the test. The analysis described in the article m

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Drobiec, Łukasz, Radosław Jasiński, and Wojciech Mazur. "The Use of Non-Destructive Testing (NDT) to Detect Bed Joint Reinforcement in AAC Masonry." Applied Sciences 10, no. 13 (2020): 4645. http://dx.doi.org/10.3390/app10134645.

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Detecting non-metallic reinforcement made of FRP (Fibre Reinforced Polymers) can be problematic, particularly at the stage of work inspection and constructional evaluation. In contrast to steel reinforcement, detecting non-metallic reinforcement is difficult using NDT (Non-Destructive Testing) techniques. These difficulties mainly arise from considerably lower density, radiation resistance or electromagnetic impedance and cross-section of rebars when compared to steel reinforcement. Specific problems with the reinforcement detection are experienced in masonry structures, in which reinforcement

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Bywalski, Czesław, Michał Drzazga, Mieczysław Kamiński, and Maciej Kaźmierowski. "A New Proposal for the Shear Strength Prediction of Beams Longitudinally Reinforced with Fiber-Reinforced Polymer Bars." Buildings 10, no. 5 (2020): 86. http://dx.doi.org/10.3390/buildings10050086.

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This paper investigates composite reinforcement with regard to its use as longitudinal reinforcement. The methods used to calculate the shear strength of concrete members reinforced with fibre-reinforced polymer (FRP) bars are analysed. The main parameters having a bearing on the shear strength of beams reinforced with composite bars are defined. A comparative analysis of the shear strength calculating algorithms provided in the available design recommendations concerning FRP reinforcement and formulas derived by others researchers is carried out. A synthesis of the research to date on sheared

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Bachorec, T., P. Fiala, M. Steinbauer, and Z. Roubal. "A Non-Destructive Impedance Method Using Resonance to Evaluate the Concentration of Steel Fibers in Concrete." Measurement Science Review 18, no. 5 (2018): 218–26. http://dx.doi.org/10.1515/msr-2018-0030.

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Abstract 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 densit

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Topolář, Libor, Luboš Pazdera, Michaela Hoduláková, Karel Mikulášek, Peter Orolin, and Oto Roth. "The Classification of Cracks Recorded during the Cyclic Loading of the Reinforced Concrete Beam by Acoustic Emission Method." Key Engineering Materials 776 (August 2018): 66–69. http://dx.doi.org/10.4028/www.scientific.net/kem.776.66.

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Non-destructive testing is a process of inspecting, testing, and evaluating materials, components or assemblies for discontinuities, or differences in characteristics without destroying the serviceability of a system or its part. The acoustic non-destructive methods are concerned with the state-of-the-art situation in the field of experimental studies of the physical properties of engineering materials. In this paper, the acoustic emission method was used for classification of cracks recorded during the cyclic loading of the reinforced concrete beam. Acoustic emission is a phenomenon of stress

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Küttenbaum, Stefan, Alexander Taffe, Thomas Braml, and Stefan Maack. "Reliability assessment of existing bridge constructions based on results of non-destructive testing." MATEC Web of Conferences 199 (2018): 06001. http://dx.doi.org/10.1051/matecconf/201819906001.

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The non-destructive testing methods available for civil engineering (NDT-CE) enable the measurements of quantitative parameters, which realistically describe the characteristics of existing buildings. In the past, methods for quality evaluation and concepts for validation expanded into NDT-CE to improve the objectivity of measured data. Thereby, a metrological foundation was developed to collect statistically sound and structurally relevant information about the inner construction of structures without destructive interventions. More recently, the demand for recalculations of structural safety

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Pospisil, Karel, Monika Manychova, Josef Stryk, Marta Korenska, Radek Matula, and Vaclav Svoboda. "Diagnostics of Reinforcement Conditions in Concrete Structures by GPR, Impact-Echo Method and Metal Magnetic Memory Method." Remote Sensing 13, no. 5 (2021): 952. http://dx.doi.org/10.3390/rs13050952.

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It is important to use adequately reliable non-destructive methods that would be capable of determining the reinforcement conditions in concrete structures. Three different methods: ground penetrating radar, impact-echo method, and metal magnetic memory method were used for testing laboratory-prepared reinforced concrete beams (with a reinforcing bar of the same diameter along its whole length, reinforcing bar locally impaired, and reinforcing bar interrupted). The ground-penetrating radar proved the correlation of signal parameters with the reinforcing bar condition. An impairment/interruptio

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Pourrastegar, Azita, Hesham Othman, and Hesham Marzouk. "Vibration-based damage identification for reinforced concrete slab-type structures using fiber-optic sensors and random decrement technique." RILEM Technical Letters 4 (May 8, 2020): 163–71. http://dx.doi.org/10.21809/rilemtechlett.2019.103.

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This paper presents and evaluates a damage identification system for reinforced concrete (RC) slab-type structures based on non-destructive vibration testing, Random decrement (RD) signal processing technique, and embedded smart network of fiber-optic sensors. The proposed system aims to overcome the challenges associated with the use of electrical sensors and signal processing of noisy dynamic data. Two experimental modal analysis investigations have been conducted. First modal testing focuses on investigating the capability of fiber-optic sensors and Multi-channel random decrement (MCRD) pro

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