Physical-Technical Properties of Fiber Concretes Using Recycled Mineral Wool Raw Materials

A promising building material for bearing structures of buildings and structures is disperse-reinforced concretes (fiber concrete), having improved deformation characteristics, increased dynamic strength and lowered crack resistance. There are studies on the operation characteristics of disperse-reinforced concretes, where metal wire, glass fiber, polymer and basalt fibers were used as fiber. The possibility of using secondary raw materials as a fiber in the form of waste of mineral wool heat insulator based on basalt rocks remains understudied. The results of the studies conducted by the authors to assess the effect of fiber (BF) from waste of mineral wool insulator on the physical and mechanical properties of heavy fine concrete showed that the introduction of basalt fiber from secondary mineral wool raw materials into the concrete mixture in an amount of 1% of the cement mass makes it possibleto increase the bending strength by 34%, at the same time, there was a slight increase in the compressive strength by 10%, compared with the control samples. The results of the study of the microstructure of cement stone showed that in the samples reinforced with fiber from secondary mineral wool, a homogeneous, dense contact zone at the fiber/matrix boundary is formed due to the uniform distribution of the fiber in the volume of concrete. The field of application of secondary mineral wool raw material as a reinforcing additive when producing concrete structures subjected to dynamic loads is substantiated.

O.V. DEMYANENKO, Research Teacher (This email address is being protected from spambots. You need JavaScript enabled to view it.)
N.O. KOPANITSA, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
E.A. SOROKINA, Master (This email address is being protected from spambots. You need JavaScript enabled to view it.)
A.N. NICHINSKY, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Tomsk State University of Architecture and Building (2, Solyanaya Square, 634003, Tomsk, Russian Federation)

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