Search academic texts

Information × Registration Number 0213U001512, 0112U001478 , R & D reports Title Physico-chemical basis for the creation of environmentally friendly flame geocement coatings to protect wood structures popup.stage_title Head Krivenko Pavlo, Registration Date 01-03-2013 Organization Kiev National University of bildiny and tecture popup.description2 Using the known laws with respect to the controlled formation of the microstructure of the matrix phase matching properties of the material, allowed by controlled sol-gel synthesis and energy impacts (cavitation treatment at P = 1,8-4,2 atm., t = 10 min., T = 30 ° C), synthesized at the nanoscale in geotsementi composition Na2O • Al2O3 • 6SiO2 • 20H2O phases - heulandite, fozhagitu and Na-mordenite at high temperatures can form a heat-resistant aluminosilicate aerated karkas.Posredstvom optimization optimum compositions discovered coatings capable of swelling containing filler aluminosilicate microspheres in an amount of 20-28%, silica-alumina pellets - in the amount of 25-35%, are characterized by technological Spreadability within 168-175 mm, and high adhesion (1 point) to a wood base. Revealed that the protective coating, filled with silica-alumina granules, 1.1-1.2 times greater importance and is characterized by swelling ratio of inventories to further swelling compared to coated silica-alumina-filled microspheres. It is shown that wood samples vogneobrobka geotsementnimy coatings molifikovani mixture polioksietilenu with Agocel S2000 and Walocel MT 400 PFV, improves their fracture toughness and flammability exposure period (120 seconds of flame exposure, the flame temperature - 1300oC). It is noted that the width of the surface area and depth of coatings, intumescent to a pine planted the fire at the time of impact is reduced by 1.02-fold compared with baseline values. A similar pattern is found for insulating coatings on birch lining width of the surface area and depth of penetration at the time of fire exposure 1,49-1,52 times reduced compared with initial values. Determined that the wood samples coated with a protective aluminum silicate coating swells, characterized by a minimum value of speed burnout 0.002 - 0.0024 kg / s . m 2, which is 1.3-1.6 times less than the criterion (0.0032 kg / s.m 2 ) and in 1,8-3,3 times smaller counterpart. According to its characteristics developed protective coatings formulations are a group G1 of combustibility, flammability - the group B1, for durability - 10 ... 12 years. Product Description popup.authors Єзерська Людмила Петрівна Білан Ярослав Валерійович Гузій Сергій Григорович Киричок Володимир Іванович Кравченко Анастасія Володимірівна Кривенко Павло Васильович Петропавловський Олег Миколайович Чеховська Ала Вікторівна popup.nrat_date 2020-04-02 Close