Year 2024

• Functional Bi2O3/Gd2O3 Silica-Coated Structures for Improvement of Early Age and Radiation Shielding Performance of Cement Pastes

  Publication

  • P. Sikora
  • J. Strzałkowski
  • T. Kędzierski
  • K. Federowicz
  • E. Mijowska

  - Nanomaterials - Year 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 method and morphology, were used to coat Bi2O3/Gd2O3 structures and evaluated...

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Year 2023

• Development of 3D printed heavyweight concrete (3DPHWC) containing magnetite aggregate

  Publication

  • K. Federowicz
  • M. Techman
  • S. Skibicki
  • M. Chougan
  • A. M. El-Khayatt
  • H. Saudi
  • J. Błyszko
  • M. Abd Elrahman
  • S. Chung
  • P. Sikora

  - MATERIALS & DESIGN - Year 2023

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• Enhancing the Fresh and Early Age Performances of Portland Cement Pastes via Sol-Gel Silica Coating of Metal Oxides (Bi2O3 and Gd2O3)

  Publication

  • K. Cendrowski
  • K. Federowicz
  • M. Techman
  • M. Chougan
  • M. Sanytsky
  • T. Kędzierski
  • P. Sikora
  • E. Mijowska

  - Coatings - Year 2023

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• Rheological, Mechanical, Microstructural and Radiation Shielding Properties of Cement Pastes Containing Magnetite (Fe3O4) Nanoparticles

  Publication

  • P. Sikora
  • A. M. El-Khayatt
  • H. Saudi
  • M. Liard
  • D. Lootens
  • S. Chung
  • P. Woliński
  • M. Abd Elrahman

  - International Journal of Concrete Structures and Materials - Year 2023

  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 program. Portland cement pastes with 5, 10, 15, 20, and 30 wt% of nanomagnetite cement replacement were produced. Moreover, rheological, early strength development, compressive strength, and...

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• Seawater-mixed concretes containing natural and sea sand aggregates – A review

  Publication

  • S. Rathnarajan
  • P. Sikora

  - Results in Engineering - Year 2023

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Year 2022

• Insight into the microstructural and durability characteristics of 3D printed concrete: Cast versus printed specimens

  Publication

  • P. Sikora
  • M. Techman
  • A. M. El-Khayatt
  • H. Saudi
  • M. Abd Elrahman
  • M. P. Hoffmann
  • D. Stephan
  • S. Chung
  • K. Federowicz

  - Case Studies in Construction Materials - Year 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 with an identical mix composition, were produced and compared, with their microstructural pore and solid characteristics quantitatively and qualitatively investigated. For this purpose,...

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