Increasing the Strength of Fine-Grained Concrete with the Use of Carbon Nanotubes and Mechanical Activation of the Mixture

Abstract

The results of studies to determine the effect of introducing a complex additive of carbon nanotubes and plasticizer into the composition of fine-grained concrete are presented. Two series of tests of beam samples were performed, and the strength characteristics of the studied compositions were determined. Two methods of introducing nano-additives into concretes were compared: using an ultrasonic dispersant and a linear induction wave action apparatus (LIA) by analyzing two series of tests of different compositions. It was established that the introduction of nanotubes using LIA provides a minimally greater increase in the compressive strength due to the activation of the cement binder by means of regrinding. However, the maximum increase in strength is achieved equally for each of the injection methods.