Porous Fly Ash/Aluminosilicate Microspheres-Based Composites Containing Lightweight Granules Using Liquid Glass as Binder
Miryuk O. Fediuk R. Amran M.
September 2022MDPI
Polymers
2022#14Issue 17
The modern energy-saving vector of development in building materials science is being implemented in a complex way through the development of new heat-insulating materials with the simultaneous exclusion of low-ecological cement from them. This article presents the results of the development of resource-saving technology for a heat-insulating composite material. The research is devoted to the development of scientific ideas about the technology and properties of effective cementless lightweight concretes. The aim of the work is to create a heat-insulating composite material based on porous granules and a matrix from mixtures of liquid glass and thermal energy waste. The novelty of the work lies in establishing the patterns of formation of a stable structure of a porous material during thermal curing of liquid glass with technogenic fillers. Studies of liquid glass mixtures with different contents of fly ash and aluminosilicate microspheres revealed the possibility of controlling the properties of molding masses in a wide range. To obtain a granular material, liquid glass mixtures of plastic consistency with a predominance of aluminosilicate microspheres are proposed. The matrix of composite materials is formed by a mobile mixture of liquid glass and a combined filler, in which fly ash predominates. The parameters of heat treatment of granular and composite materials are established to ensure the formation of a strong porous waterproof structure. The possibility of regulating the structure of composite materials due to different degrees of filling the liquid glass matrix with porous granules is shown. A heat-insulating concrete based on porous aggregate has been developed, characterized by the genetic commonality of the matrix and the granular component, density of 380–650 kg/m3, thermal conductivity of 0.095–0.100 W/(m °C) and strength of 3.5–9.0 MPa, resistance under conditions of variable values of humidity and temperature. A basic technological scheme for the joint production of granular and composite materials from liquid glass mixtures is proposed.
heat-insulating materials , lightweight concrete , liquid glass , porous filler , thermal energy waste
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Department of Construction and Building Materials Science, Rudny Industrial Institute, Rudny, 111500, Kazakhstan
Polytechnical Institute, Far Eastern Federal University, Vladivostok, 690922, Russian Federation
St. Petersburg Polytechnic University, St. Petersburg, 195251, Russian Federation
Department of Civil Engineering, College of Engineering, Prince Sattam Bin Abdulaziz University, Alkharj, 16273, Saudi Arabia
Department of Civil Engineering, Faculty of Engineering and IT, Amran University, Amran, 9677, Yemen
Department of Construction and Building Materials Science
Polytechnical Institute
St. Petersburg Polytechnic University
Department of Civil Engineering
Department of Civil Engineering
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