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

Abstract This work examines the influence of iron oxide nanoparticles (Fe 3 O 4 NPs) on neutron and gamma-ray radiation shielding characteristics Portland cement paste. Experimental evaluations were supplemented with theoretical studies using NXCom program. pastes 5, 10, 15, 20, 30 wt% nanomagnetite replacement produced. Moreover, rheological, early strength development, compressive strength, mercury intrusion porosimetry (MIP) tests performed. The results showed that increasing amount Fe NPs in a mix leads to gradual increment measured viscosity yield stress. High nano-Fe content substantially impeded development process led decrement 7- 28-day MIP exhibited total porosity, average pore volume, as was increased. All macroscopic cross-sections slow, fast thermal neutrons constantly increased result addition magnetite nanoparticles, their variations being markedly linear. Similarly, gamma attenuation test indicated powder enhances capability paste energy range interest (0.08–2.614 MeV). In conclusion, can be successfully used producing lead-free cementitious composites improved properties. However, certain drawbacks related an matrix porosity thus mechanical performance should taken into account.