Influence of the Chemical Composition of Minerals on the Mechanical Properties of Basalt Continuous Fibers

In this work, the aim was to define the dependence of the strength of basalt fibers (BCF) on their chemical composition, characterized by two parameters: the NBO/T ratio and the acidity modulus Ma. It makes it possible to predict the change in the mechanical parameters of fibers from their composition, since basalt rocks have a significant drawback - the inconstancy of the chemical composition. Fibers of various chemical compositions were obtained based on 14 different basalt deposits. Pearson’s correlation coefficient for NBO/T and ultimate tensile strength was 0.79, and for acidity modulus and tensile strength it was 0.53. The tensile strength of tested fibers from different deposits ranges from 1495 to 3380 MPa. In addition, with the help of the Raman spectra analysis, it was confirmed that tensile strength can be largely determined by the influence of the chemical composition of basalts on their structure.