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First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address.Khaliullin M.I. – candidate of technical sciences, associate professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Rakhimov R.Z. – doctor of technical science, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Gaifullin A.R. – candidate of technical sciences, senior lecturer E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan State University of Architecture and Engineering The organization address: 420043, Russia, Kazan, Zelenaya st., 1
Title of the articleThe effect of lime additive on the physico-mechanical properties of the composite gypsum-lime-pozzolanic binders
Abstract.The aim of this work was to develop cost-effective composite gypsum-lime-pozzolanic binders with improved physical and mechanical properties, particularly water resistance, which allows to extend the scope of the traditional application of gypsum building materials. Lime additive was introduced into the composition of the gypsum binder in conjunction with ground clay dust, as well as with hybrid mineral Supplement that includes ground haydite dust and blast furnace granulated slag. For the development of compositions of composite gypsum-lime-clay binders with high water resistance and composite water-resistant gypsum-lime-expanded clay, slag binders was investigated the effect of lime introduced into the complex with the pozzolanic additives on the strength characteristics and water resistance of the artificial stone on the basis of binders. Obtained dependencies allowed to reveal the optimum amount of lime depending on pozzolanic activity of samples of expanded-clay dust and blast furnace granulated slag of different dispersion and basicity of slag. It is shown that increasing the strength and water resistance of the artificial stone based on composite gypsum-lime-pozzolanic binders is because low basic calcium hydrosilicates formed in the result of the interaction of lime with the pozzolanic additives, fill the pores of the stone, further enhancing the contact intergrowths of crystals of dihydrate gypsum, limiting the possibility of penetration of water to them and their dissolution.
Keywords.pozzolanic additive, expanded clay dust, ground blast furnace slag, composite gypsum-lime-pozzolanic binders, pozzolanic activity, active mineral additives, artificial stone, water resistance.
For citations:Khaliullin M.I., Rakhimov R.Z., Gaifullin A.R. The effect of lime additive on the physico-mechanical properties of the composite gypsum-lime-pozzolanic binders // Izvestiya KGASU. 2015. №4(34) P.304-311.


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