Аннотация:Search of new thermally steady substrates is necessary for decrease in cost of production of carbon nanofibres. Optimum parameters of receiving a metakaolin and condition of its introduction in cement are investigated. It is established that the burned kaolinic clay can be used as a substrate for cultivation of carbon nanofibres (CNFs). It is shown that introduction in composition of cement of 3% of a metakaolin together with 1% of CNFs in the presence of 0,2% of Melflux 1641F superplasticizer increases durability of a cement stone at compression for 35%, and at a bend – practically twice.