Self-Sensing Cementitious Composites: Review and Perspective

Abstract

Self-sensing concrete (SSC) has been vastly studied for its possibility to provide a cost-effective solution for structural health monitoring of concrete structures, rendering it very attractive in real-life applications. In this review paper, comprehensive information about the components of self-sensing concrete, dispersion methods and mix design, as well as the recent progress in the field of self-sensing concrete, has been provided. The information and recent research findings about self-sensing materials for smart composites, their properties, measurement of self-sensing signal and the behavior of self-sensing concrete under different loading conditions are included. Factors influencing the electrical resistance of self-sensitive concrete such as dry-wet cycle, ice formation and freeze thaw cycle and current frequency, etc., which were not covered by previous review papers on self-sensing concrete, are discussed in detail. Finally, major emphasis is placed on the application of self-sensing technology in existing and new structures.

Electrical resistance and self-sensing properties of pressure-sensitive materials with graphite filler in Kuralon fiber concrete

“…Although not significantly contributing to the conductivity, the addition of fibers was effective in mitigating damage to the conductive network caused by the extension of cracks. The test results also showed that the recovery rate of resistance variation was higher than that of the normal concrete group when the specimens exceeded the compressive failure strength, which is consistent with previous studies by Ding et al [26] and Bekzhanova et al [27].…”

“…It shows that adding K fibers to conductive concrete can reduce the speed at which cracks develop within concrete. The use of fibers can significantly reduce the trend of increasing resistivity [27] and has great potential for monitoring fatigue damage in different concrete structures [46].…”

“…Most studies have investigated the resistance of self-sensing concrete using composite materials [25] and admixtures [26]. In addition, the age, degree of hydration [27], and moisture content [28] of cement matrix materials are critical factors in the influence of electrical resistance [29]. Hanxun et al [30] showed that dried polyvinyl alcohol fiber specimens showed higher resistivity based on the effect of the moisture content on resistivity due to changes in electrical conductivity of the filler and the concrete matrix.…”

Electromechanical properties of self-sensing cement pastes polarized while fresh

“…If the stresses in the structural element is known, its life expectancy can be easily calculated using the simple beam theory [6]. The non-intrinsic sensors is based on utilizing external sensing devices such as: strain gauges, fiber optic sensors, and piezoelectric sensors [7]. While the intrinsic sensors are based on enhancing the self-sensing capabilities of the material.…”

Nanomodification of Lightweight Fiber Reinforced Concrete with Micro Silica and Its Influence on the Constructive Quality Coefficient

“…At the same time, the following tasks are considered: environmental protection, involvement of waste in the production of building materials to reduce the consumption of cement and improve the economic performance, improving the quality of building materials, including their operational resistance and durability, creation of waste-free technologies to produce building materials. Furthermore, the structural health monitoring techniques can investigate their condition to ensure the safety of the infrastructure during its service life [ 3 , 4 , 5 ].…”