▎ 摘　　要

New multi-component composites based on Magnesium Oxychloride Cement (MOC) were developed as an alternative to commonly used construction materials. In this study, the MOC matrix was modified by the addition of tannic acid, graphene, and multi-walled carbon nanotubes (MWCNT). The prepared samples were analyzed in detail with a focus on micro- and macrostructural parameters, phase composition, and assessment of physical and mechanical properties. The influence of tannic acid addition on the hygric parameters and softening coefficient was also studied in detail. The results confirmed that the application of the carbon-based nanomaterials even in a very low amount significantly improved the mechanical properties of the multi-component composites. Interestingly, the addition of tannic acid led to an improvement in mechanical performance as well as water resistance. It was also demonstrated that the material porosity dramatically decreased with the application of dopants. The developed composites with improved material properties will find applications mainly in the construction industry.