Rezumat
Influence of complex acoustic-radio wave treatment of water on an index of activity of ions of hy- drogen, rheological specifications prepared by a cement-sand mixtures and technological parameters of the obtained plasticized fine-grained concrete studied. Two methods used to reach the maximum influence on an index of activity of ions of hydrogen of water, mobility, keeping of the prepared concrete compounds, den- sity and durability at compression of concrete. The first method – four -minute complex acoustic-radio wave treatment of water (high frequency (5.28 MHz) + ultra sound (44 kHz)), with the subsequent four minute additional impact of a high-frequency field. The second used method – four-minute complex treatment of water (high frequency (5.28 MHz) + ultra sound (1 MHz)) with the subsequent two-minute additional impact of a high frequency field. Assumptions about the mechanism of acoustic-radio-wave activation of water and its impact on the process of hardening and structure of Portland cement systems are stated.