Ефективні сухі будівельні суміші для елементів підлог цивільних будівель

Abstract

The work is devoted to solving the problem of creating effective dry building mixtures for the elements of floors of civil buildings, by performing directional porousing of mixtures and activation of its components, using industrial wastes. The hypothesis for obtaining effective dry building mixtures for elements of floors of civil buildings by the introduction of fine mineral powders, as complex additives-modifiers and stabilizers of the properties of dry mixes. To this end, ash removal and carbonate limestone wastes can be applied with their complex activation together with other components of the mixture. In the work it is established that the introduction of mineral additives allows to increase the technical characteristics of foam. Thus, the multiplicity of foam without mineral additive is 15, and the resistance is 210 s. When adding fine-grained carbonate limestone powder, the foam stability increases to 468 s and the multiplicity drops to 13,5. This is because the fine particles of the fillers saturate the foam solution, forming a foam system and increasing the native density. Foam resistance increases due to the increase in surface tension of the water membranes of the foaming agent around the air bubbles, due to the dissociation of mineral matter on their surface. It is experimentally established that the sound insulation capacity of an obstacle, 3 cm thick, made from the developed dry mixes , is ΔL = 15-35 dB. Below are the recommendations for the manufacture and formulation of porous mixtures for floor elements, technological schemes for mechanical activation and manufacture of dry mixes economic effect of the application of the results of work is given.