| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ferreira, Rui Miguel
VTT Technical Research Centre of Finland
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2023Modelling of aged reinforced concrete structures for design extension conditions (CONFIT)
- 2023A closer look at the corrosion of steel liner embedded in concretecitations
- 2019Design, construction, and NDT of a mock-up for reinforced concrete walls in NPP
- 2018Betonisiltojen lujuustutkimukset 2017-2018
- 2018Mock-up wall for non-destructive testing and evaluation of thick reinforced concrete structures in nuclear power plants
- 2016Detection capability of NDT methods in steel-concrete-steel composite elements
- 2016Modeling chloride ingress under freeze-thaw loading – 3D fem approach
- 2016NDE Research of Nuclear Power Plant Primary Circuit Components and Concrete Infrastructure in Finland
- 2016Selection Matrix for Non-Destructive Testing of NPP Concrete Structures
- 2013Condition assessments and corrosion measurements of cooling water chambers in a nuclear power plant
- 2012Concrete durability based on coupled deterioration by frost, carbonation and chloride
- 2012Influence of metakaoline on the chloride penetration performance of concrete
- 2012Simulation technique for service life assessment of façade refurbishment
- 2012Service life design of concrete subject to frost attack and carbonation/chloride penetration
- 2012Effect of concrete frost deterioration on chloride penetration and carbonation
- 2009New trends in concrete-polymer composite materials and systems
- 2008New trends in concrete-polymers composite materials and systems
- 2006Estimating long-term durability parameters based on electrical resistivity measurements
- 2006Concrete workability and water resistance improvement using polymeric admixtures
- 2006Quality control based on electrical resistivity measurements
- 2004Probabilistic assessment of the durability performance of concrete structures
Places of action
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article
Detection capability of NDT methods in steel-concrete-steel composite elements
Abstract
Steel concrete steel (SC) is a structural typology and construction method. Continuous steel plates are used on the surfaces of concrete walls/slabs, having both the roles of formwork and tensile reinforcement. The steel plates completely replace the longitudinal reinforcement, but shear reinforcement may still be present. SC gained popularity in industrial applications, with the notable use in modules of the AP-1000 nuclear power plant (NPP). The presence of thick continuous steel plates on both sides of the construction elements hinders the use of many traditional non-destructive evaluation (NDE) techniques to assess concrete quality or damage. In fact, reliable and cost effective assessment of structures is an outstanding challenge to the use of SC construction in nuclear applications. To understand the limitations and possibilities of NDE techniques, several tests were performed on full scale SC elements. The elements were approximately 0.8x0.8x9.0m beams, tested earlier to static loads and with understood damage of the concrete. The NDE methodologies applied were Ultrasound 3D tomographer, Impact-Echo, Impulse-Response, Ground Penetrating Radar, Betatron and Ultrasonic testing. The objective was to detect cracks of different sizes and configurations in the beams. Width ranges of 0.1…1 mm were studied, on cracks perpendicular or oblique to the surface, generated by pure bending and combined bending and shear. Both crack types may be present in NPP walls/floors damaged by accidental overload. The results show that Ultrasound 3D tomographer (as well as the other ultrasonic testing devices) and Ground Penetrating Radar are not suitable for testing trough the steel surface, due to loss of the transmitted energy in the steel plates. Impact-Echo testing revealed promising results whereas Impulse-Response is suitable for detecting de-bonding of the steel plate from the concrete. Radiographic testing proved to be applicable in cases when the cracks had sufficient opening and length close enough to the film side.