Modification of Fine Concrete with Carbon Nanotubes

The priority direction of construction materials science is the production of materials with increased performance characteristics. The most common building material is concrete, of various functional purposes. The development of the construction complex leads to the design of increasingly complex structures, the construction of which requires highly efficient concrete with increased operational reliability. In this article, the application of a modifying complex additive to concrete of carbon nanotubes “Taunit-M” and plasticizer SP-3 is considered. Two methods of introducing nanoscale additives into the composition of fine concrete are considered. The results of two series of tests of beam samples at the age of 28 days using different methods of nanotube injection, namely, the use of an ultrasonic dispersant and the use of a linear induction apparatus (LIA), are presented. The positive effect of the introduction of nanotubes on the strength characteristics of concrete has been established. It is determined that the use of LIA provides a greater increase in strength due to the double effect of activation of the cement binder and the distribution of the nano-additive by active mixing due to vortex action.