MODIFICATION OF CEMENT AND CONCRETE WITH CARBON NANOMATERIALS, OBTAINED BY PLASMA METHOD

The paper presents the results of studies of the structure and phase composition of cement stone modified with carbon nanomaterials (CNM), which were obtained as a co-product in a plasma plant. Under the action of plasma arc from the electrode material and coal supplied for the gasification, carbon nanomaterials – fullerenecontaining soot are formed simultaneously in one apparatus. The introduction of carbon nanomaterials improves the physical, mechanical and performance properties of cement and concrete by accelerating the hydration process of Portland cement, improving the microstructure and reduction of porosity of cement stone. The results of differential thermal analysis and infrared spectrometry indicate a change in the formed CSH in cement with carbon nanomaterials. The improvement in strength at different times of hardening, frost resistance, water absorption and water resistance of concrete were found.