No abstract

The study presents the results of the composition development for producing heat-insulating fire-resistant coating for concrete and metal surfaces of various construction facilities. The composition includes binder - siloxane rubber, filler - hollow carbon microspheres, and flame retardant additive – electroplating sludge. Siloxane rubber improves heat-insulating properties of the obtained coating. Hollow carbon microspheres used as fillers in the amount of 20-50 wt.p. decrease heat insulation of the coating. Flame retardant additive in the amount of 10-15 wt.p. provides self-extinction effect to the cured coating. The study demonstrates that hollow carbon microspheres characterized by low heat insulation ratio are much more effective as compared to the glass or ceramic microspheres. Besides, they provide high strength and low specific weight due to their valuable physical and chemical properties. Metals hydroxides and oxides contained in the electroplating sludge serve as flame retardants in the polymer heat insulating coating, and effectiveness of their activity is directly proportional to their content in the composition, but the increase of galvanic sludge over 15% is undesirable, as the composition viscosity increases physical and mechanical properties of polymer coating. The study demonstrates that siloxane resin based composition filled with hollow carbon microspheres and containing flame retardant additive of galvanic sludge facilitates producing comparatively cheap but rather effective construction polymer coatings with good heat-insulating and fire resistant characteristics.

No abstract

The paper presents the research results dealing with the development of energy-efficient thermal insulation material based on the binder of 10 % polycarbosilane solution in xylene, filled with various hollow microspheres and fibrous filler from quartz fibers. According to the research results the best effect was demonstrated by the samples of thermal insulation material, containing hollow carbon microspheres as filler. When the binder contains 10% of polycarbosilane solution in xylene-15-70% wt., hollow carbon microspheres 12-65% wt. and quartz fibers 8-43% wt., the resulting foam possesses reduced density, low thermal conductivity and good strength characteristics. It allowed this material to be recommended for the use as energy-efficient heat-resistant insulation in various industries, including power and aircraft engineering.

The results of developing protective polymer coating characterized by high strength and containing galvanic waste are presented. This coating is designed to protect concrete and metal surfaces of various building structures against adverse natural and external impact. The coating is developed basing on polymethylphenylsiloxane binder, tetraisopropyltitanate hardener and anthropogenic waste - galvanic sludge - used as the filler. The application of polymethylphenylsiloxane as a binder improves heat-resistant properties of the resulting coating and reduces its water absorption. Galvanic sludge in an amount of 5-15 wt. allows increasing the coating strength properties and reducing its cost, meanwhile solving another important issue - safe disposal of galvanic sludge.