RESEARCHES OF INFLUENCE OF CYCLICALLY OPERATING NEGATIVE AND POSITIVE TEMPERATURES ON THE DAMPING PROPERTIES OF CEMENT COMPOSITES

Abstract: results of a research of the damping properties of cement composites with various water cement relation, with additive super – and hyper softeners, fillers – ground quartz and microsilicon dioxide, quartz sands of various fineness at cyclic influence of negative and positive temperatures are given in the article. The damping properties of cement composites are determined by a resonant method. It is revealed that the studied structures of composites show changes of the damping properties at cyclic influence of negative and positive temperatures. Decrease in the damping properties is characteristic of all structures at the beginning of the researches, and then at increase in cyclic influence of negative and positive temperatures there is a further reduction or increase in an indicator. It is established that increase in decrement of fluctuations with growth of duration of an experiment is caused by destructive processes in structure of material.

Keywords: cement composites, filler, concretes of a new generation, thermo-cyclic testing, the damping capacity, logarithmic decrement of oscillations