Development of Mechano-Responsive CNT-Epoxy Concrete

Abstract

Cracking in engineering concrete structures poses a significant problem as it not only accelerates the rate of deterioration but also diminishes the structural strength. The current repair materials being used are capable of short-term repairs only and may result in destroying the concrete structure due to additional damage. In this study, Carbon nanotube (CNT)-Epoxy concrete is proposed as a sensing repair material to address this problem. The authors assess the electrical properties of samples based on the CNT content and aggregates and report on the optimal mixing ratio of CNT-Epoxy concrete. The electro-mechanical characterization of CNT-Epoxy concrete was evaluated through a series of experiments such as static and cyclic loadings. CNT-Epoxy concrete exhibits accurate sensing response under compression and maintains a consistent cyclic response. The findings from the study demonstrate that CNT-Epoxy concrete is an effective material for repairing concrete cracks, offering favorable compressive strength, and showing reliable sensing ability. © The Author(s) 2025.