Analysis of electrical and piezoresistive properties of mortar reinforced with carbon microfibers

Abstract

Multifunctional mortars have been developed for applications in self-sensing systems, electromagnetic shielding, cathodic protection, and other areas. In this research, mortar was produced based on the limits of the Brazilian standard NBR 11173 (reinforced mortars), with carbon microfiber. Mechanical strengths and modulus of elasticity properties were analyzed, as well as electrical and piezoresistivity properties. From the results obtained, an increase in tensile strength was observed, as well as in electrical conductivity and piezoresistivity. Therefore, it can be concluded that the studied mix proportion has potential for the development of further research aimed at the application of mortars with electrical properties. The application of these mortars as multifunctional cement composites can contribute to extending the durability of buildings and, consequently, reducing the demand for raw materials, aligning with the Sustainable Development Goals (SDG) established by the United Nations (UN).