Experimental Investigation and Benchmarking of 3D Textile Reinforced Cementitious Composites (original) (raw)
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Experimental study and benchmarking of 3D textile reinforced cement composites
Cement and Concrete Composites, 2019
Textile Reinforced Cement composites (TRC) have become a key research topic when it comes to lightweight alternative construction materials for traditional concrete industry. While most of the research performed on TRC combines a cementitious matrix material with 2D fibre textiles, this paper investigates the mechanical behaviour of TRC reinforced with 3D fibre textiles. The main goal is to investigate the influence of the transversal fibre that is connecting the fibre layers and is typical for 3D textiles, on the tensile and flexural properties of the TRC. Therefore two fibre textile architectures were compared, firstly an unaltered 3D fibre textile and secondly a tensile-equivalent 2D fibre textile with equal in-plane textile reinforcement. An experimental campaign in tension and bending was performed on four different TRC layups. When comparing the bending behaviour of the unaltered 3D-TRCs with the 2D alternatives, an increase in stiffness in the post-cracking stage was observed, while no influence was observed in tension. The experimental results were also compared with numerical predictions of the 2D-TRCs to put in evidence the influence of the 3D architecture.
Applied Sciences
As previous research has shown, the use of 3D textiles does not only facilitate the manufacturing process of Textile Reinforced Cement (TRC) composites but also influences the mechanical properties of the TRC. A fundamental understanding of the contribution of the transversal connections in the 3D textile to the loadbearing behavior of 3D TRCs is, however, still lacking in the literature. Therefore, this research experimentally investigates two different parameters of 3D TRCs; firstly, the 3D textile typology, namely knitted versus woven transversal connections, is investigated. Secondly, the influence of the stress direction with respect to the orientation of these connections (parallel or perpendicular) is studied. A clear influence of the orientation is witnessed for the woven 3D TRC system while no influence is observed for the knitted 3D TRC. Both woven and knitted 3D TRC systems show an increased post-cracking bending stiffness compared to an equivalent 2D system (with the sam...
Tensile strength of 3D textiles reinforced cementitious composites plates
MATEC Web of Conferences, 2018
Tensile plate specimens with dimension of 450×100×40mm were cast with 3D glass fabric having three different thicknesses 6, 10 and 15mm to measure their tensile strength. Plates with one and two layers of chicken wires, as well as micro steel fiber of 0.75% volume fraction were tested under tensile for comparison with references plates. Cement mortar with 61.2MPa cube compressive strength at 28 days was designed for casing the plates. The results indicated that after cracking of the mortar the textile reinforcement adds a strain hardening trajectory, that cause failure to occurs at slightly higher load and a higher strain. The improvement in tensile strength at 28 days ranged between 5 to 30%, and for 90 days between 5 to 60% for the three types of fibres used. Based on the results a significant increase was indicated with micro steel fiber.
FLEXURAL BEHAVIOR OF 3D TEXTILES REINFORCED CEMENTITIOUS COMPOSITES PLATES
This paper presents the flexural behavior of plate specimens (with dimension 500×500×40 mm) containing 3D glass fabric having three different thicknesses 6, 10 and 15mm with different number of layers and orientation. For comparison plates with one and two layers of chicken wires as well as plates with micro steel fiber of 0.75% volume fraction were casted. All plate specimens were cast with cement mortar having 61.2MPa cube compressive strength at 28 days and tested under flexural. From the test, it was observed that the load carrying capacities are higher in the case of plates with 3D glass fabric and showed a gradual increase in toughness beyond the ultimate load as compared with non-fibrous plates. The flexural strength was increased significantly the fiber thickness and number of fibers layers was increased. Based on the results a significant increase was indicated with micro steel fiber.
Thin fiber and textile reinforced cementitious systems (SP-244)
The publication contains ten papers that were presented at the technical session on Thin Fiber and Textile Reinforced Cementitious Systems held in New York, NY, in Fall 2005. The topics of the papers cover experimental and theoretical materials aspects such as the effect of different input fibers, fabric type, and construction and matrix on mechanical and long-term properties of the composite; experimental and theoretical considerations on yarn-to-matrix bond and load transfer; as well as applications of the cementitious composites proposed and examples of strengthening of reinforced concrete using textile-reinforced concrete.
Fabric structure and its reinforcing efficiency in textile reinforced cement composites
Composites Part A: Applied Science and Manufacturing, 2003
In polymer matrices reinforced with fabrics, the effectiveness of the reinforcement is reduced when the yarns do not maintain a straight geometry. In cement composites, this concept may not be adequate since the nature of the interaction between the cement matrix and the fabric and its individual yarns is more complex, as concluded from pullout tests. The present paper discusses the bulk properties and geometrical characteristics of textile fabrics that need to be considered in order to predict the performance of cement composites reinforced with textile fabrics. It was found that the geometry of a given fabric could enhance the bonding and enable one to obtain strain hardening behavior from low modulus yarn fabrics, due to the special shape of the yarn induced by the fabric. On the other hand, variations of the geometry in a fabric could drastically reduce the efficiency, resulting in a lower strengthening effect of the yarns in the fabric, relative to single yarns not in a fabric form. Therefore, in cement composites the fabrics cannot be viewed simply as a means for holding together continuous yarns to be readily placed in the matrix, as is the case in composites with polymer matrix.
Durability study of textile reinforced cementitious composites with low fiber volume fraction
2017
Steel reinforced concrete is the most popular material for modern building solutions. One of its well-known issues is the high susceptibility of steel to corrosion. In recent times, research has focused on the replacement of steel rebars in reinforced concrete. The use of textiles has gained a strong interest in this context. These textiles can be impregnated into mortars or concrete and are not sensitive to corrosion. However, for practical applications, an analysis of their durability performance and long term behavior is necessary.In this paper textile reinforced cementitious composites (TRCs) with a low fiber volume fraction are studied. To study their long term behavior, the specimens were aged by performing heatrain and freeze-thaw cycles, according to EN 12467. After ageing, the structural performance of the aged specimens was compared to reference specimens by means of a uniaxial tensile test. To compare the structural behavior quantitively, a focus was placed on the mechani...
Materials, 2022
In general, 20–25% of the original fibre weight is considered waste in the production of high-quality textiles for the construction sector. A market analysis has shown that in the Republic of Croatia alone, up to 327 tonnes of this waste is produced annually, which is enough to reinforce 50 to 150 thousand m3 of cementitious composites. This preliminary study aims to evaluate the contribution of glass, basalt and carbon fibres generated as waste in the local production of high-performance technical textiles, to the fresh and hardened properties of fibre reinforced mortars. In order to investigate the influence of fibres, three types of fibres in two different lengths (5 and 10 mm) were used, while the amount of fibres was constant. The obtained results show that due to the fibre presence, workability is reduced regardless of the type and length of the fibre. The tested fibres have a negligible effect on compressive strength, but the use of basalt and carbon fibres increases the tens...