Water-resistant fiber-reinforced gypsum cement-pozzolanic composites Rustem Mukhametrakhimov, Albert Galautdinov, Polina Gorbunova and Tatyana Gorbunova E3S Web Conf., 138 (2019) 01011 Published online: 16 December 2019 DOI: 10.1051/e3sconf/201913801011