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
This study presents a new approach towards the production of sol-gel silica-coated Bi2 O3 /Gd2 O3 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 Bi2 O3 /Gd2 O3 structures and evaluated as a cement filler in Portland cement pastes. Isothermal calorimetry studies and early strength evaluations confirmed that both proposed coating types can overcome retarded cement hydration process, attributed to Bi2 O3 presence, resulting in improved one day compressive strength by 300% and 251% (depending on coating method) when compared to paste containing pristine Bi2 O3 and Gd2 O3 particles...
January 12, 2024: Nanomaterials