Optimization of the composition of fiber foam concrete with polypropylene fiber Fox Polfiber M12 produced by basf companyAllanazar Ilyasov, Anvar Adilkhodjaev, Irkin Makhamataliev and Allambergen AllamuratovE3S Web of Conf., 452 (2023) 06011DOI: https://doi.org/10.1051/e3sconf/202345206011