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 (BJRS), Rio de Janeiro, Brazil, v. 13, n. 1, p. e2777, 2025. DOI: 10.15392/2319-0612.2025.2777. Disponível em: https://bjrs.org.br/revista/index.php/REVISTA/article/view/2777. Acesso em: 17 jul. 2025.