ФОРМИРОВАНИЕ СТРУКТУРЫ И СВОЙСТВ ГЕОПОЛИМЕРНОГО ПЕНОБЕТОНА ПРИ РАЗНЫХ СПОСОБАХ ПРИГОТОВЛЕНИЯ ЯЧЕИСТОЙ СЫРЬЕВОЙ СМЕСИ

Abstract

It is known that the quality of a concrete composite, especially a cellular one, largely depends not only on the properties of the original raw materials but also on many technological factors, which are often decisive. In particular, this is relevant when forming a cellular structure. This article discusses the influence of various methods of preparing a cellular raw mixture in the synthesis of geopolymer foam concrete on the features of the formation of its cellular structure, as well as its physical and mechanical properties. Visual analysis was used to assess the quality of formation of the cellular structure. It has been established that for the preparation of a geopolymer cellular raw mixture, 2 methods were identified as the most effective, in which a 4-stage mixing of components is provided: preparation of foam; preparation of an aqueous alkaline solution; mixing of solid-phase components; preparation of a geopolymer suspension followed by the addition of foam. It was found that when using both methods with a 4-stage mixing of components, samples of geopolymer foam concrete contribute to providing the lowest values for such physical characteristics as average density: 615 and 620 kg/m3; and thermal conductivity coefficient: 0.109 and 0.112 W/m2∙oC. At the same time, the least effective methods of preparing a raw mixture are a one-stage mixing of components, in which an almost destroyed cellular structure is observed and, as a result, unsatisfactory indicators of physical and mechanical properties.