Influence of the fabric construction parameters and roving type on the tensile property retention of high-performance rovings in warp-knitted reinforced fabrics and cement-based composites

Abstract

In this work, the tensile property retention characteristics of high-performance glass and carbon rovings in warp-knitted reinforced fabrics and cement-based composites used in structural applications were investigated. Three types of warp-knitted fabrics, with differing stitch patterns, and cement-based composites were produced. The tensile strength retention and Young’s modulus retention of the roving in these fabrics and their influence on the properties of cement-based composites were compared on the basis of the stitch type. Samples of warp-knitted fabrics composed of glass fibres and carbon fibres exhibit retention of 76–87% and 65–87.6%, respectively, of the initial strength of the rovings. The highest Young’s modulus retention (∼80%) occurs in the case of the fabric sample composed of glass rovings. The retention of the Young’s modulus in the fabric samples composed of carbon rovings was 37–60%. In addition, the translation of strength from the roving to the fabric and retention of the Young’s modulus in the carbon rovings decreased with increasing strength and modulus, respectively, of the original roving. On the basis of the data presented, we provided guidelines for the possible application of the developed fabrics. As conclusion, it is possible to reduce the cost of the raw materials by using fabrics whose original rovings have low tensile strength and Young’s modulus, but high retention properties.

Monitoring capabilities of various smart self sensory carbon-based textiles to detect water infiltration

“…The reasons for the differences in the electrical readings between the two bindings are related to their level of impregnation and accordingly their bonding mechanism. The influence of the binding is mainly induced by the roving cross-section (relatively circular or elliptical), (Hegger and Voss, 2008; Peled and Bentur, 2003; Peled et al, 1999; Perry et al, 2020; Quadflieg et al, 2017; Stolyarov et al, 2015). Generally, in uncoated textile, due to cracking the filaments that are located at the interphase with the concrete matrix tend to break, and only the core filaments continue to carry the internal tensile load.…”

“…From the structural response point of view, an enhanced structural performance is achieved by improving the textile impregnation and the bonding between the textiles and the cementitious matrix. It is achieved by using different binding configurations (Hegger and Voss, 2008; Peled and Bentur, 2003; Peled et al, 1999; Quadflieg et al, 2017; Stolyarov et al, 2015), applying pre-treatment procedures such as coating (Gao et al, 2004; Hegger et al, 2006), combining binding and coating (Perry et al, 2020), or by improving the penetrability of the cementitious matrix (Brockmann, 2007). However, from the sensory point of view it was found (Goldfeld and Yosef, 2019) that coating eventually limits the sensory capabilities in case of monitoring the exact structural state and the severity of cracks.…”

“…Since enhancement of one aspect may not necessarily improve the other as well. From the structural point of view, it is the state of the art to use impregnant textile and most of the studies in the literature were focused on investigating various textile configurations with respect to their structural performance (Hegger and Voss, 2008; Peled et al, 2017; Quadflieg et al, 2017; Stolyarov et al, 2015). The current study aims to answer the question whether a textile configuration that enhanced the structural performance can also improve the sensory capabilities.…”

A review on the damping properties of fiber reinforced polymer composites

“…The damping mechanism of fiber reinforced composites is different from common metals. The approaches of energy dissipation in fiber reinforced composites mainly include the viscoelastic characteristics of matrix and fiber, the damping due to interface region and matrix cracks, and the viscoplastic damping [23,26].…”

Analysis of reinforcement efficiency and microscopic characterization of glass and carbon roving geometry in prestressed concrete composites

“…Accordingly, samples of fabrics and concrete composites made with flattened rovings have higher strength compared to reinforcing rovings with elliptical crosssections. Thus, it was found 20,28 that an increase in contact length significantly increases the strength of the concrete composite. A similar conclusion can be made by comparing the cross-sectional shape of the prestressed roving with the cross-sectional shape of the roving in the warp-knitted reinforcing fabrics, as shown for carbon roving in Figure 11.…”