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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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Adamczewski, Grzegorz
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Publications (4/4 displayed)
- 2021Concrete corrosion in a wastewater treatment plant – A comprehensive case studycitations
- 2020Relation between microstructure, technical properties and neutron radiation shielding efficiency of concretecitations
- 2018Risk of concrete carbonation with mineral industrial by-productscitations
- 2018Influence of Method of Preparation of PC Mortar with Waste Perlite Powder on Its Rheological Properties
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article
Relation between microstructure, technical properties and neutron radiation shielding efficiency of concrete
Abstract
The paper presents a study on the properties of New Generation Shielding Concrete (NGS-Concrete) modifiedby materials containing fast neutron moderators and thermal neutron absorbers. The reference ordinaryconcrete (OC) was modified by the change of the coarse aggregate from crushed granite to magnetiteone and cement from CEM III 42.5N to CEM I 42.5R. The addition of gadolinium oxide, polypropylenemacro- or/and microfibers, acrylic dispersion, acrylic dispersion together with gadolinium oxide, epoxydispersion, and finally the inorganic chemical compound containing boron (NaBH4) was used as well.The experimental program included: microstructure studies (analysis of fracture surface, visual andimage analysis of cross sections, observations using scanning electron microscopy – SEM, volume andabsolute density and total porosity calculated from gravimetric measurements), compressive strength,ultrasonic pulse velocity (UPV) as well as neutron radiation shielding efficiency measurement expressedas half value layer (HVL), determined by the neutron radiation equivalent dose reduction. The relationswere investigated using a multiple regression analysis of experimental results. A good correlationbetween the compressive strength and ultrasonic pulse velocity for all concretes was confirmed. The neutronradiation shielding efficiency expressed as HVL was mainly influenced by volume density (VD). Themathematical model HVL (VD) turned out to be the most reliable, whereas any other independent variableadded to this bivariate model was statistically not significant. It was concluded that neutron radiationshielding depends on the volume density of concrete, which is determined mainly by phase andatomic composition changes of aggregate and a lesser extent by microstructure changes