The study of the hardening process Portland cement`s concrete with bio cementing additivesElena S. Dergunova, Valeria A. Goncharova, Alexey Y. Romanchukevich and Margarita A. GoncharovaMATEC Web Conf., 329 (2020) 04008DOI: https://doi.org/10.1051/matecconf/202032904008