Zobrazeno 1 - 10
of 18
pro vyhledávání: '"M El-Khayatt A"'
Autor:
Hamdy A. Abdel-Gawwad, Ahmed M. El-Khayatt, A. Alkaoud, Alaa M. Rashad, Piotr Smarzewski, Mohammed Abd Elrahman, Khalifa Al-Jabri, Taher A. Tawfik
Publikováno v:
Case Studies in Construction Materials, Vol 21, Iss , Pp e03461- (2024)
In this paper, a new strategy is applied to synthesize a safe-to-use one-part (OP) alkali-activated binder via controlling the activation rate of blast furnace slag (BFS) and fly ash (FA). The proposed strategy involved creating a reactive powder wit
Externí odkaz:
https://doaj.org/article/e8ba20a0291c490f8d7a188a1d6c3047
Autor:
Pawel Sikora, Ahmed M. El-Khayatt, H. A. Saudi, Maxime Liard, Didier Lootens, Sang-Yeop Chung, Paweł Woliński, Mohamed Abd Elrahman
Publikováno v:
International Journal of Concrete Structures and Materials, Vol 17, Iss 1, Pp 1-14 (2023)
Abstract This work examines the influence of iron oxide nanoparticles (Fe3O4 NPs) on neutron and gamma-ray radiation shielding characteristics of Portland cement paste. Experimental evaluations were supplemented with theoretical studies using NXCom p
Externí odkaz:
https://doaj.org/article/626d55b51ca049db89696e30ffcdbc49
Autor:
Karol Federowicz, Mateusz Techman, Szymon Skibicki, Mehdi Chougan, Ahmed M. El-Khayatt, H.A. Saudi, Jarosław Błyszko, Mohamed Abd Elrahman, Sang-Yeop Chung, Pawel Sikora
Publikováno v:
Materials & Design, Vol 233, Iss , Pp 112246- (2023)
The main objective of this study is to develop 3D printed heavyweight concrete (3DPHWC) to produce elements with a dry density of up to 3500 kg/m3 by replacing natural aggregate (SA) with magnetite aggregate (MA) up to 100%. A comprehensive systemati
Externí odkaz:
https://doaj.org/article/84338acf73e64d30b5a8f95cc838761b
Autor:
Krzysztof Cendrowski, Karol Federowicz, Mateusz Techman, Mehdi Chougan, Ahmed M. El-Khayatt, H. A. Saudi, Tomasz Kędzierski, Ewa Mijowska, Jarosław Strzałkowski, Daniel Sibera, Mohamed Abd Elrahman, Pawel Sikora
Publikováno v:
Nanomaterials, Vol 14, Iss 2, p 168 (2024)
This study presents a new approach towards the production of sol-gel silica-coated Bi2O3/Gd2O3 cement additives towards the improvement of early mechanical performance and radiation attenuation. Two types of silica coatings, which varied in synthesis
Externí odkaz:
https://doaj.org/article/edde05257c844abf96c87ba112a0e80d
Autor:
Pawel Sikora, Mateusz Techman, Karol Federowicz, Ahmed M. El-Khayatt, H.A. Saudi, Mohamed Abd Elrahman, Marcin Hoffmann, Dietmar Stephan, Sang-Yeop Chung
Publikováno v:
Case Studies in Construction Materials, Vol 17, Iss , Pp e01320- (2022)
This study presents the comparison of microstructural and durability characteristics of 3D printed concrete (3DPC) depending on its production method (printing or casting). Printed samples with different numbers of layers, as well as a cast specimen
Externí odkaz:
https://doaj.org/article/a628c9b7ae1b4097869d12f962807bf4
Publikováno v:
Frontiers in Bioscience-Landmark, Vol 28, Iss 4, p 84 (2023)
Background: Trans-[Cu (quin)2(EtOH)2], a new copper (II) complex, was characterized using a variety of computational techniques to explore its biological role in pharmacological applications. Methods: The computational methods included density functi
Externí odkaz:
https://doaj.org/article/f44d37adc8604b6d8fbae9807ff67245
Autor:
Mostafa A. Masoud, Ahmed M. El-Khayatt, Mohamed G. Shahien, Bottros R. Bakhit, Ibrahim I. Suliman, Ahmed M. Zayed
Publikováno v:
Toxics, Vol 10, Iss 11, p 697 (2022)
Serpentinites are metamorphic rocks that are widely applied as aggregates in the production of radiation-shielding concrete. Different varieties of massive serpentinite mountains located in Egypt exist without real investment. Hence, this study aims
Externí odkaz:
https://doaj.org/article/ff91f915ff0a4b51bd17972abaf62fa1
Autor:
Fawzia E. M. Elbashir, Wassim Ksouri, Farouk Habbani, Ahmed M. El-Khayatt, Mohamed Hassan Eisa, Ibrahim I. Suliman
Publikováno v:
Applied Sciences, Vol 12, Iss 8, p 3857 (2022)
We compared the results of absorbed dose measurements made using the TRS-398, TG-51, and DIN protocols and their associated uncertainties to reduce discrepancies in measurement results made using the three protocols. This experiment was carried out o
Externí odkaz:
https://doaj.org/article/771ad3ca00ac44bebfcdb62f145ef0eb
Publikováno v:
Sustainability; Volume 15; Issue 12; Pages: 9245
Appropriate glass systems can provide efficient transparent radiation shielding. The current study involved the preparation of the glass system with a composition of xEu2O3-(15-x)ZnO-10CaO-35PbO-40P2O5 (where x = 0, 1, 2, 3, and 4 wt.% Eu2O3). The fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=multidiscipl::d057e952603527056982da3bf429abc4
Autor:
Mostafa A. Masoud, Ahmed M. El-Khayatt, Mohammad W. Marashdeh, Mohamed G. Shahien, Bottros R. Bakhit, Wael Abdelwahab, Mohamed Abdel Rafea, Ahmed M. Zayed
Publikováno v:
Sustainability; Volume 14; Issue 23; Pages: 16225
Barite and hematite are the most common heavy-weight minerals applied as aggregates in radiation shielding concrete (RSC). Therefore, to limit the cement consumption and reduce the CO2 emissions accompanying its production, the aim of this study is t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79de4e7d2c15f915ed87aa8d64da84b2