Abstract
The article is concerned with the topical issue of effective lightweight concrete technology development. The objective of this study is to investigate properties of concrete mixes and lightweight magnesia concretes based on granulated expanded polystyrene and porous mineral filling materials. The following raw materials such as caustic magnesite, granulated expanded polystyrene, aluminosilicate microspheres, expanded perlite, and expanded vermiculite were used in the experiments. Concrete mixes were prepared using magnesia binder, porous fillers, and magnesium chloride solution. Technological properties of concrete mixes were determined by the Abrams cone slump; identity of the coefficient was ensured by magnesium chloride solution to caustic magnesite ratio. Concretes operating abilities were evaluated by density, strength, and strength-density ratio. Mathematical planning and processing of experimental results allowed us to develop models reflecting the dependence of magnesite concrete properties on the content and type of filling materials. Effect of each porous mineral filler on polystyrene concrete’s properties was determined. Caustic magnesite and combined fillers provide homogeneous and stable lightweight concrete structure with a density of 380–840 kg/m3 and strength of 0.9–8.7 MPa. The results of the study are aimed at expanding the range and improving technical characteristics of low-density concrete.
© 2026 Olga Miryuk, published by Riga Technical University
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