The Effect of Nanomagnetite on the Shielding Properties of Cementitious Composites

Author(s): Horszczaruk E., Brzozowski P., Sikora P., Cendrowski K. and Mijowska E.
Paper category: Proceedings
Book title: Proceedings of International Conferences (ICACMS) Advances in Construction Materials and systems Vol 2
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN: 978-2-35158-194-0
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 80-88
Total Pages: 9
Language : English

Abstract: Concrete is an economical and effective material for shielding stationary reactors. Due to possible accidental conditions such as steam leakage, fire or terrorist attacks requires satisfactory shielding properties along with high thermal resistance are desired parameters in such structures. One of the novel additives which can find its potential application leading to improvement of strength and microstructure are nanomaterials. In the present work the effect
of nanomagnetite (nano-Fe3O4) addition to cement pastes cured in normal conditions and exposed to temperature of 300 and 450οC on its gamma-ray shielding characteristics are investigated. Cement pastes containing addition of 5% and 10% (by mass of cement) of nanomagnetite have been prepared. The gamma-ray attenuation coefficients were measured as a function of the additive percentage of nanomagnetite for gamma-ray energy using 0.662
MeV 137Cs source. The obtained data revealed that the incorporation of nanomagnetite increase the density of cement pastes, therefore, improves the gamma-ray attenuation coefficient. Moreover, addition of nanomagnetite improved the thermal resistance of samples by reducing amount of cracks. This contributed to much denser structure resulting in better shielding properties while compared to plain cement paste. Radiation tests have been
supported with visual inspection of samples.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00