Effect of Bacillus megaterium bacteria on geopolymer concrete as self-healing agent in repairing cracks of bridge structureStella Nathania, Luthfi Muhammad Mauludin, Gandhi Widiarnoko and Muhammad Azhar Ariefkha DaniE3S Web Conf., 664 (2025) 05001DOI: https://doi.org/10.1051/e3sconf/202566405001