INCREASING IN IMPACT VISCOSITY OF FIBER-ASH-CONCRETE Fediuk R.S., Liseytsev Yu.L., Taskin A.V., Timokhin R.A., Klyuev S.V., Cézar Casagrande https://doi.org/10.34031/2618-7183-2020-3-6-5-16 Download PDF 5-16 p. fedjuk-1