Вестник Дагестанского государственного технического университета: Технические науки (Jun 2019)
FOAM GYPSUM PRODUCTS BASED ON LOCAL BINDERS
Abstract
Objectives. The problems of production of porous gypsum products on a local gypsum binder in the Karachay-Cherkess Republic are considered. Method. The study is based on the method of "dry" mineralization of foams, developed at the Moscow State University of Civil Engineering. As the source materials used plaster binder brand G-6 Ust-Dzhegutinsky plaster plant. An alkyl dimethylamine oxide (amine oxide) foaming agent was chosen as a foaming agent (PO). The choice of software is made taking into account its compatibility with the gypsum binder. At the same time, software of various classes was studied. Studies were performed to obtain foamed gypsum with an average density of 900 kg / m3. Result. A technology for the production of foam gypsum is proposed, based on the technology for the production of foam concrete by the method of “dry” mineralization of foams. The choice of foaming agent was made by comparative evaluation of the studied parameters of foaming agents of various classes. A technique has been developed for designing foamed gypsum formulations to produce products of a given average density. The technique includes the determination of the flow rate of HS, water flow and foaming agent, the determination of the B / T ratio. It was proposed to design the GHG compositions based on a given design average material density (), which in this case is equal to the consumption of dihydrate gypsum (CaSO42H2O). In the proposed method of obtaining foam – gypsum masses, the distinctive feature is the use of the technological properties of dense foams with low multiplicity. The boundary conditions for obtaining wall foam-gypsum products from a local gypsum binder that meet the requirements of GOST have been determined. Conclusion. Using modern research methods, it has been established that foam-hypo products from Ust-Dzhegutinsky gypsum of grade G-6 meet the requirements of standards for building heat-insulating and construction-heatinsulating products with a density of 400-1000 kg / m 3.
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