Exploring the radiation shielding efficiency of low-impact Portland cement pastes made with barium sulfate, silica fume and fly ash. Brazilian Journal of Radiation Sciences, Rio de Janeiro, Brazil, v. 13, n. 1, p. e2777, 2025. DOI: 10.15392/2319-0612.2025.2777. Disponível em: https://www.bjrs.org.br/revista/index.php/REVISTA/article/view/2777. Acesso em: 2 may. 2025.